Research activity information

• Report on the International Symposium “Submarine Caldera Volcanoes ─ The Cutting Edge of Our Understanding Achieved by Various Approaches ─” at Kobe and Post-conference Field Trip at Kagoshima in March 2024

  哲男 松野, 孝司 清杉, 礼奈 中岡, 由弦 山本, 克哉 金子, 賢太 上木, 揚二朗 山本, 亜妃 伊藤, 桂子 鈴木

  Dec. 2024, 火山, 69(4) (4), 223 - 228, Japanese

  [Refereed]


• Submarine cores record magma evolution toward a catastrophic eruption at Kikai Caldera

  Takeshi Hanyu, Nobukazu Seama, Katsuya Kaneko, Qing Chang, Reina Nakaoka, Koji Kiyosugi, Yuzuru Yamamoto, Tetsuo Matsuno, Keiko Suzuki-Kamata, Yoshiyuki Tatsumi

  Aug. 2024, Communications Earth & Environment, 5, 428

  [Refereed]

  Scientific journal


• Submarine pyroclastic deposits from 7.3 ka caldera-forming Kikai-Akahoya eruption

  Satoshi Shimizu, Reina Nakaoka, Nobukazu Seama, Keiko Suzuki-Kamata, Katsuya Kaneko, Koji Kiyosugi, Hikaru Iwamaru, Mamoru Sano, Tetsuo Matsuno, Hiroko Sugioka, Yoshiyuki Tatsumi

  Elsevier BV, Apr. 2024, Journal of Volcanology and Geothermal Research, 448, 108017 - 108017

  Scientific journal


• Shallow structure and late quaternary slip rate of the Osaka Bay fault, western Japan

  Mari Hamahashi, Hironori Otsuka, Yoshiaki Suzuki, Jun Arimoto, Tetsuo Matsuno, Nobukazu Seama, Yuzuru Yamamoto, Hiroko Sugioka, Stephen A. Bowden, Satoshi Shimizu, Hikaru Iwamaru, Mamoru Sano, Keita Suzuki, Katsuya Kaneko, Kazuo Nakahigashi, Yoshiyuki Tatsumi

  Abstract The Osaka Bay is situated at a seismically active region north of the Median Tectonic Line and east of Awaji Island in western Japan, known as part of the Kinki Triangle and the Niigata–Kobe Tectonic Zone. Dense distribution of active faults and high geodetic strain rates characterize the region, posing a major seismic hazard potential to the coastal and metropolitan areas of the Kansai region. To investigate the shallow structure and recent deformation history of active faults in the Osaka Bay, we acquired 15 high-resolution seismic profiles using a Mini-GI airgun and a Boomer as active sources, together with multi-beam bathymetry data across the Osaka Bay Fault. Our seismic sections image a ~ 0.1 to 3.7 km-wide asymmetric anticline forelimb above the Osaka Bay Fault at shallow depths, coupled with a ~ 2.6 km-wide syncline to the west, and a broad, ~ 11 km-wide syncline in the footwall to the east. The synclinal axial surface at shallow depths measured in this study ranges 75°–89°. We observe the vertical displacement of the Osaka Bay Fault increasing northwards along strike. The sediment thickness on the hanging wall, however, is variable, modified by non-tectonic processes such as by tidal currents, affecting the geometry of growth strata. The most recent deformation by the Osaka Bay Fault reaches to near the seafloor by active folding, with large vertical offsets of 8–14 m over the last ~ 11 ka, and 5–11 m over the last ~ 5 ka. By combining with previously reported borehole age data, the average uplift rate on the Osaka Bay Fault is estimated to be ~ 1.0 to 1.7 m/ka during the Latest Pleistocene to Holocene. The inferred slip of the Osaka Bay Fault during the Holocene is likely to account for > 5% of the regional geodetic strain accumulation within the Kinki Triangle. Further studies to evaluate the Holocene slip rates of regional faults are necessary to assess the seismic hazards and the internal strain budgets within the Kinki Triangle and the Niigata–Kobe Tectonic Zone. Graphical abstract

  Springer Science and Business Media LLC, Feb. 2024, Progress in Earth and Planetary Science, 11(1) (1)

  Scientific journal


• Voluminous magma formation for the 30-ka Aira caldera-forming eruption in SW Japan: contributions of crust-derived felsic and mafic magmas

  Ayumu Nishihara, Yoshiyuki Tatsumi, Katsuya Kaneko, Jun-Ichi Kimura, Qing Chang, Nobuo Geshi, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Hironobu Hinata, Keiko Suzuki-Kamata

  Understanding the origin, assembly, and evolution of voluminous magma that erupts in catastrophic caldera-forming eruptions (CCFEs) is a community imperative. A CCFE of the Aira caldera at 30 ka discharged over 350 km³ of magma, which can be grouped into petrographically and geochemically distinct types: voluminous rhyolite, small amounts of rhyodacite, and andesite magmas. To further understand the magma plumbing system of the Aira CCFE, we examined the geochemical characteristics of whole rock and plagioclase from its eruptive deposits. The trace element and ⁸⁷Sr/⁸⁶Sr signatures recorded in the plagioclase phenocrysts of these magmas indicate that the three magmas were originally produced by partially melting an identical source rock, which was estimated to be a mafic amphibolite with an ⁸⁷Sr/⁸⁶Sr signature of ∼0.7055 that comprised the lower crust. Melting of mafic amphibolite produced both felsic and mafic magmas by low and high degrees of partial melting, respectively. The mafic magma assimilated uppermost crustal materials and crystallized to produce an andesite magma type. The andesitic magma consists of phenocrysts (∼39 vol%) and melt with a dacitic (∼70 wt% SiO₂) composition. The felsic magma mixed with ∼10% of the andesite magma and crystallized, forming the rhyolite magma. The mixing between the andesite and rhyolite magmas before the Aira CCFE produced the rhyodacite magma. The 30-ka Aira CCFE magmas were generated only by melting two kinds of crustal materials with different geochemical characteristics and had geochemical variations due to different conditions of partial melting and mixing between various crustal melts. The lack of definitive evidence of the mantle component mixing with the Aira CCFE magmas suggests that the mantle-derived magmas worked only as a heat source for crustal melting.

  Frontiers Media SA, Jan. 2024, Frontiers in Earth Science, 11

  Scientific journal


• Characteristics of the Kikai-Akahoya and Kikai-Tozurahara eruption deposits from submarine cores

  Nakaoka R., Suzuki K., Kaneko K., Seama N., Kiyosugi K., Yamamoto Y., Matsuno T., Hanyu T., Shimizu S., Tatsumi Y.

  The Volcanological Society of Japan, 2024, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2024, 217 - 217, Japanese

  Research society


• Magmatic evolution leading to multiple calderagenic eruptions at Kikai volcano, Southwest Japan

  Maria Luisa Tejada, Tomoki Sato, Bogdan Vaglarov, Reina Nakaoka, Yoshi Tatsumi, Takeshi Hanyu, Qing Chang, Kenta Ueki, Katsuya Kaneko, Keiko Suzuki-Kamata, Takashi Miyazaki, Iona McIntosh, Nobukazu Seama, Koji Kiyosugi, Osamu Ishizuka, Morihisa Hamada

  Geochemical Society, 2024, Goldschmidt2024 abstracts

  International conference proceedings


• Evolution of magma supply system beneath a submarine lava dome after the 7.3-ka caldera-forming Kikai-Akahoya eruption

  Morihisa Hamada, Takeshi Hanyu, Iona M. McIntosh, Maria Luisa G. Tejada, Qing Chang, Katsuya Kaneko, Jun-Ichi Kimura, Koji Kiyosugi, Takashi Miyazaki, Reina Nakaoka, Kimihiro Nishimura, Tomoki Sato, Nobukazu Seama, Keiko Suzuki-Kamata, Satoru Tanaka, Yoshiyuki Tatsumi, Kenta Ueki, Bogdan S. Vaglarov, Kenta Yoshida

  Elsevier BV, Dec. 2022, Journal of Volcanology and Geothermal Research, 107738 - 107738

  Scientific journal


• Chemical evolution of magma toward the catastrophic eruption at Kikai Caldera recorded in Chikyu SCORE tephra

  Hanyu Takeshi, Chang Q., Kaneko Katsuya, Nakaoka Reina, Kiyosugi Koji, Suzuki―Kamata Keiko, Yamamoto Yuzuru, Matsuno Tetsuo, Seama Nobukazu, Tatsumi Yoshiyuki

  Kikai submarine caldera caused several catastrophic eruptions. In order to understand the eruption processes and magmatic evolution, we measured chemical composition of tephra collected via the SCORE program with D/V Chikyu. We used submarine tephra from the K-Ah eruption (7300 years ago), that from the K-Tz eruption (95000 years ago), and that intercalated between the two catastrophic eruptions, the age of which is approximately 40000 years ago or younger. The tephra from the K-Tz eruption is predominated by felsic pyroclasts, but the presence of a few mafic pyroclasts suggests the contribution of mafic melts during the K-Tz eruption. The tephra intercalated between the two catastrophic eruptions have chemical composition similar to those of K-Ah, implying that the storage of felsic magmas commenced at least 40000 years ago toward the next catastrophic eruption of K-Ah.

  GEOCHEMICAL SOCIETY OF JAPAN, 2022, Abstracts of Annual Meeting of the Geochemical Society of Japan, 69, 96, Japanese


• Characteristics of Kikai caldera volcanic product revealed by seafloor drilling samples

  Nakaoka Reina, Kaneko Katsuya, Seama Nobukazu, Suzuki Keiko, Kiyosugi Koji, Hanyu Takeshi, Yamamoto Yuzuru, Matsuno Tetsuo, Satoshi Shimizu, Sugioka Hiroko, Yoshiyuki Tatsumi

  Kikai Caldera volcano has repeatedly erupted in large scale eruptions such as the Kikai Akahoya eruption 7,300 years ago and the Kikai Tozurahara eruption 95,000 years ago, and detailed eruption history can be studied by combining seafloor and on-land surveys.In this study, core samples were collected by the SCORE program of CHIKYU based on the subsurface structure revealed by seismic reflection surveys of large eruptive ejecta on the seafloor, which are still largely unknown.The chemical composition of the volcanic glass was analyzed and compared with subaerial deposits, and it was found that the two large-scale eruptive ejecta are thickly deposited on the seafloor as well, and that the Kikai Akahoya product is divided into two units on the seafloor as well.In addition, the chemical compositional characteristics of volcanic glass in piston core samples from a wide area around the Kikai caldera suggest that the Kikai Akahoya product may have become less accessible to distant sites as the eruption progressed.

  GEOCHEMICAL SOCIETY OF JAPAN, 2022, Abstracts of Annual Meeting of the Geochemical Society of Japan, 69, 95, Japanese


• Evolution of magma plumbing system beneath a submarine caldera after the Akahoya eruption at Kikai volcano

  Hamada Morihisa, Hanyu Takeshi, McIntosh Iona M., Tejada Maria Luisa G., Chang Qing, Kaneko Katsuya, Kimura Jun-Ichi, Kiyosugi Koji, Miyazaki Takashi, Nakaoka Reina, Nishimura Kimihioro, Sato Tomoki, Seama Nobukazu, Suzuki-Kamata Keiko, Tanaka Satoru, Tatsumi Yoshiyuki, Ueki Kenta, Vaglarov Bogdan S.

  The Volcanological Society of Japan, 2022, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2022, 92 - 92, Japanese


• Drilling into the Mantle: A Key to Prognosticating the Future of the Ocean Planet

  Yoshiyuki Tatsumi, Nobuaki Suenaga, Shoichi Yoshioka, Katsuya Kaneko

  Water circulation, along with plate subduction, is considered based on the stabilities of hydrous phases and pressure–temperature profiles of the sinking oceanic plate. Water in a rather hot slab like the present one may be largely liberated at shallow depths (< 150 km) and return to the ocean via. arc magmatism. On the other hand, stabilization of dense hydrous minerals under cooler conditions, which current subduction zones will soon experience, causes the transportation or reflux of seawater to the deep mantle, which reduces the total mass of surface seawater. Simple calculations accepting water contents in the subducting slab suggested by a recent seismic velocity structure model indicate that the Earth's oceans are likely to disappear ∼80 million years hence. Significant changes may happen such as the end of plate tectonics and the onset of snowball Earth, with associated catastrophes affecting life. The only way to confirm this picture of the future of the ocean planet Earth is to examine deep hydration taking place along the outer rise through direct analyses of the upper mantle across the Moho.

  Last, Tokyo Geographical Society, Aug. 2021, Journal of Geography, 130(4) (4), 585 - 597, Japanese

  [Refereed]


• Contrasting volcano spacing along SW Japan arc caused by difference in age of subducting lithosphere

  Yoshiyuki Tatsumi, Nobuaki Suenaga, Shoichi Yoshioka, Katsuya Kaneko, Takumi Matsumoto

  The SW Japan arc built by subduction of the Philippine Sea (PHS) plate exhibits uneven distribution of volcanoes: thirteen Quaternary composite volcanoes form in the western half of this arc, Kyushu Island, while only two in the eastern half, Chugoku district. Reconstruction of the PHS plate back to 14 Ma, together with examinations based on thermal structure models constrained by high-density heat flow data and a petrological model for dehydration reactions suggest that fluids are discharged actively at depths of 90–100 km in the hydrous layer at the top of the old (> 50 Ma), hence, cold lithosphere sinking beneath Kyushu Island. In contrast, the young (15–25 Ma) oceanic crust downgoing beneath Chugoku district releases fluids largely at shallower depths, i.e. beneath the non-volcanic forearc, to cause characteristic tectonic tremors and low-frequency earthquakes (LFEs) and be the source of specific brine springs. Much larger amounts of fluids supplied to the magma source region in the western SW Japan arc could build more densely-distributed volcanoes.

  Springer Science and Business Media LLC, Dec. 2020, Scientific Reports, 10(1) (1), English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Control of volcanic activity by crustal structure: Inference from the Izu-Bonin-Mariana and Northeast Japan arcs

  Katsuya Kaneko, Kenta Mishiro, Yoshiyuki Tatsumi

  Lead, Nov. 2019, Geophysical Research Letters, 46, 12968 - 12976, English

  [Refereed]

  Scientific journal


• Vertical change in transparency of water at Lake Nyos, a possible indicator for the depth of chemocline

  Kazuto Saiki, Katsuya Kaneko, Takeshi Ohba, Romaric Ntchantcho, Alain Fouepe, Minoru Kusakabe, Gregory Tanyileke, Joseph.V. Hell

  Elsevier, Feb. 2019, Journal of African Earth Sciences, 152, 122 - 127, English

  [Refereed]

  Scientific journal


• Eruption history and petrogenesis of rocks from Nyos volcano (NW Cameroon): Evidence from lithostratigraphy and geochemistry

  Takeshi Hasegawa, Festus Tongwa Aka, Yasuo Miyabuchi, Linus Anye Nche, Tetsuo Kobayashi, Katsuya Kaneko, Asobo Nkengmatia Elvis Asaahk, Boniface Kankeu, Issa, Takeshi Ohba, Minoru Kusakabe, Joseph Victor Hell

  2019, Journal of volcanology and geothermal research, 378, 51 - 71, English

  [Refereed]

  Scientific journal


• Vertical distribution of dissolved CO2 in lakes Nyos and Monoun (Cameroon) as estimated by sound speed in water

  Kazuto Saiki, Katsuya Kaneko, Takeshi Ohba, Mitsuhisa Sanemasa, Minoru Kusakabe, Romaric Ntchantcho, Alain Fouepe, Gregory Tanyileke, Joseph V. Hell

  Geological Society of London, 2017, Geological Society Special Publication, 437(1) (1), 185 - 192, English

  [Refereed]

  Scientific journal


• Decreasing removal rate of the dissolved CO2 in Lake Nyos, Cameroon, after the installation of additional degassing pipes

  T. Ohba, S. Ooki, Y. Oginuma, M. Kusakabe, Y. Yoshida, A. Ueda, K. Anazawa, K. Saiki, K. Kaneko, Y. Miyabuchi, Issa, F. Aka, W. Fantong, A. Ako, G. Tanyileke, J. V. Hell

  Geological Society of London, 2017, Geological Society Special Publication, 437(1) (1), 177 - 184, English

  [Refereed]

  Scientific journal


• A new method to determine dissolved CO2 concentration of lakes Nyos and Monoun using the sound speed and electrical conductivity of lake water

  Mitsuhisa Sanemasa, Kazuto Saiki, Katsuya Kaneko, Takeshi Ohba, Minoru Kusakabe, Romaric Ntchantcho, Alain Fouepe, Gregory Tanyileke, Joseph V. Hell

  Geological Society of London, 2017, Geological Society Special Publication, 437(1) (1), 193 - 203, English

  [Refereed]

  Scientific journal


• Magma plumbing system of the Aso-3 large pyroclastic eruption cycle at Aso volcano, Southwest Japan: Petrological constraint on the formation of a compositionally stratified magma chamber

  Katsuya Kaneko, Kazuhisa Inoue, Takehiro Koyaguchi, Masako Yoshikawa, Tomoyuki Shibata, Toshiro Takahashi, Kuniyuki Furukawa

  Sep. 2015, JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 303, 41 - 58, English

  [Refereed]

  Scientific journal


• P70 Eruption history and magma systems of Nyos volcano, northwestern Cameroon

  Hasegawa T., Miyabuchi Y., Kobayashi T., F.T. Aka, K. Boniface, Issa, L.A. Nche, C.S.F. Nguemhe, Kaneko K., Ohba T., Kusakabe M., G Tanyileke, J.V. Hell

  The Volcanological Society of Japan, 2015, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 168 - 168, Japanese


• B3-08 Magma plumbing system of the Aso-3 large pyroclastic eruption cycle at Aso volcano, Southwest Japan : petrological constraint on the formation of a compositionally stratified magma chamber

  KANEKO Katsuya, INOUE Kazuhisa, KOYAGUCHI Takehiro, YOSHIKAWA Masako, SHIBATA Tomoyuki, TAKAHASHI Toshiro, FURUKAWA Kuniyuki

  The Volcanological Society of Japan, 2015, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 84 - 84, Japanese


• P72 Development of mobile sensor for volcanic observation "HOMURA" : Test campaign at Kirishima Iwo-yama

  KANEKO Katsuya, ITO Ko-ichi, IWAHORI Kodai, ANBE Yu-ichi, Sagi Hirotaro

  The Volcanological Society of Japan, 2015, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 170 - 170, Japanese


• Vertical profiles of dissolved CO2 concentration in Lakes Nyos and Monoun estimated from sound velocity of lake water

  Kazuto Saiki, Katsuya Kaneko, Takeshi OHBA, Mitsuhisa Sanemasa, Minoru Kusakabe, Romaric Ntchantcho, Alain Fouepe, Gregory Tanyileke, Joseph Hell

  2015, Journal of the Geological Society, English

  [Refereed]

  Scientific journal


• Development of small-size robot for volcanic exploration: Mobile sensor for volcanic observation "HOMURA" (Special issue: Unmanned observation robots)

  Kaneko K., Anbe Y., Ito K., Iwahori K.

  人が近づくことが危険な活動的火山の火口内で機動的に観測を行う小型ロボット,火山観測用自走式センサー「ほむら」の開発・実用化を目指している.ほむら開発において,走行不能になりにくいこと,製作・運用費を低くすることに重点をおき,上下対称形の車体をもつ,安価に製作できる試作機を完成させた.三宅島雄山と伊豆大島三原山の火山フィールドで走行を試験し,不整地でほむらが優れた移動能力を持つことを確認し,改良点を明らかにした.今後,通信系の改良と火山観測のための専用センサーを開発し,ほむら実用化に向けた運用試験を行いたい.

  The Japanese Society for Planetary Sciences, Jun. 2012, Planetary People - The Japanese Society for Planetary Sciences, 21(2) (2), 130 - 137, Japanese

  [Refereed]


• Development of Mobile Sensor for Volcanic Observation “HOMURA”

  KANEKO Katsuya, ITO Ko-ichi, ANBE Yu-ichi

  Monitoring of volcanic phenomena close to active volcanic vents and inside active craters is needed to predict change of volcanic activities and to understand dynamics of volcanic eruptions. In order to carry out safe volcanic monitoring, we have developed a prototype of a mobile sensor for volcanic observation “HOMURA” which is a new robotic system that has been designed to observe volcanic phenomena inside active volcanic craters. HOMURA is a small unmanned ground vehicle (approx. 780×560×300mm in dimension and 10kg in weight) with six wheels driven by electric motors and it is operated by wireless remote control at a distance of more than 1km. Data measured by some sensors in HOMURA are sent to the base station in real time. Materials of the vehicle body and wheels are aluminum with 2mm thick and plywood with 9mm thick, respectively. HOMURA can climb up and down a rough surface with slope angle of 30 degree. In addition, HOMURA does not readily become undrivable even in overturning during climbing because it has a unique body shape with a horizontal symmetry plane. HOMURA can be made and transported to mission fields at small costs. These allow us to make a new vehicle even if HOMURA should be lost by accident during missions and promptly to explore a sudden volcanic event by HOMURA. In test campaigns at Aso volcano and Izu-Oshima volcano, we confirmed that HOMURA has planned abilities on moving on rough surfaces and wireless communication.

  The Volcanological Society of Japan, Apr. 2010, BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN, 55(2) (2), 109 - 118, Japanese

  [Refereed]


• Crustal processes of magmas in large-scale silicic volcanism: a review and new insights on Aso volcano

  金子 克哉, 小屋口 剛博, 高橋 俊郎

  海洋出版, 2008, 号外地球, (60) (60), 187 - 197, Japanese


• Repeated large-scale eruptions from a single compositionally stratified magma chamber: An example from Aso volcano, Southwest Japan

  Katsuya Kaneko, Hiroki Kamata, Takehiro Koyaguchi, Masako Yoshikawa, Kuniyuki Furukawa

  Nov. 2007, JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 167(1-4) (1-4), 160 - 180, English

  [Refereed]

  Scientific journal


• Aso Volcano: Gigantic pyroclastic flow eruptions and post-caldera activity.

  Miyabuchi, Yasuo, Hideo Hoshizumi, Katsuya Kaneko, Yasuaki Sudo, Tsuneomi Kagiyama

  2007, Field Guide of Field excursions of City on Volcanoes 5 in Shimabara, C3.1-C3.20, English


• 阿蘇火山におけるAso-3大規模噴火をもたらしたマグマ溜まりの形成過程

  井上 和久, 金子 克哉, 小屋口 剛博

  海洋出版, Jun. 2006, 月刊地球, 28(6) (6), 392 - 399, Japanese

  Scientific journal


• 阿蘇火山におけるマグマ供給系の長期的進化

  金子克哉, 小屋口剛博, 古川邦之

  海洋出版, Feb. 2006, 月刊地球, 28(2) (2), 67 - 74, Japanese

  Scientific journal


• 阿蘇火山における大規模および小規模活動の岩石学的特長

  古川邦之, 金子克哉, 小屋口剛博, 鎌田浩毅

  2006, 月刊地球，28，392-399, Japanese


• A new technique of radiation thermometry using a consumer digital camcorder: Observations of red glow at Aso volcano, Japan

  T Saito, S Sakai, Iizawa, I, E Suda, K Umetani, K Kaneko, Y Furukawa, T Ohkura

  2005, EARTH PLANETS AND SPACE, 57(12) (12), E5 - E8, English

  [Refereed]

  Scientific journal


• Erratum to "Experimental study on the effects of crustal temperature and composition on assimilation with fractional crystallization at the floor of magma chambers" [J. Volcanol. Geotherm. Res. 129 (2004) 155-172] 10.1016/S0377-0273(03)00238-5

  Katsuya Kaneko, Takehiro Koyaguchi

  Jun. 2004, Journal of Volcanology and Geothermal Research, 134(3) (3), 249, English

  [Refereed]

  Scientific journal


• Experimental study on the effects of crustal temperature and composition on assimilation with fractional crystallization at the floor of magma chambers

  K Kaneko, T Koyaguch

  Jan. 2004, JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 129(1-3) (1-3), 155 - 172, English

  [Refereed]

  Scientific journal


• Thermal evolution of silicic mushy bodies after basalt replenishment. (共著)

  Koyaguchi, Takehiro, Katsuya Kaneko

  2001, Trans. Roy. Soc. Edinburgh,91, 47-60, English

  [Refereed]


• Simultaneous crystallization and melting at both the roof and floor of crustal magma chambers: Experimental study using NH4Cl-H2O binary eutectic system

  K Kaneko, T Koyaguchi

  Mar. 2000, JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 96(3-4) (3-4), 161 - 174, English

  [Refereed]

  Scientific journal


• Thermal evolution of silicic magma chambers after basalt replenishments

  Takehiro Koyaguchi, Katsuya Kaneko

  2000, Special Paper of the Geological Society of America, 350, 47 - 60

  International conference proceedings


• Thermal evolution of silicic magma chambers after basalt replenishments

  T Koyaguchi, K Kaneko

  2000, TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH-EARTH SCIENCES, 91, 47 - 60, English

  [Refereed]

  Scientific journal


• A two-stage thermal evolution model of magmas in continental crust

  T Koyaguchi, K Kaneko

  Feb. 1999, JOURNAL OF PETROLOGY, 40(2) (2), 241 - 254, English

  [Refereed]

  Scientific journal


• わが国の地質環境の長期的変動特性評価（その３）―東北日本を対象とした火山活動の時空分布特性評価.

  近藤浩文, 田中和広, 金子克哉

  1999, 電力中央研究所研究報告, no. U97064，44pp, Japanese

  [Refereed]


• Characterization of spatial and temporal distribution of volcanoes since 14 Ma in the Northeast Japan arc.

  Kondo, Hirofumi, Katsuya Kaneko, Kazuhiro Tanaka

  1999, Bull. Volcanol. Soc. Japan,40, 241-254, 43, 427 - 429, English

  [Refereed]


• Evolution of magma system in the crust -Investigations based on thought experiments and analogue experiments-

  KANEKO Katsuya, KOYAGUCHI Takehiro

  Thermal and compositional evolution of magmas in the continental crust are profoundly affected by the melting processes of the crust and convection in magmas. The results of calculations on heat transfer between a hot liquid and a cold solid suggest that the cooling rate of the liquid significantly increases when the solid/liquid interface moves due to melting driven by vigorous convection. Analogue experiments have been carried out using NH_4Cl-H_2O binary eutectic system to determine the conditions under which melting and/or convection occur at the roof and the floor of a magma chamber. When a cold solid mixture with the eutectic composition is placed at the top of a hot solution of higher NH_4Cl content, vigorous thermal convection occurs in the solution, which results in rapid melting of the solid roof to form a stable melt layer with negligible mixing of the underlying liquid. On the other hand, when the cold solid mixture is placed at the bottom of the hot solution, the convection is driven by compositional gradient due to floor melting as well as crystallization just above the floor. Because the compositional convection carries a low heat flux, the rate of melting and the temperature profile around the floor do not differ greatly from those that would be observed due to conductional one. Unlike the roof melting, the melt generated by the floor melting efficiently mixes with the overlying solution. The implication for the thermal and compositional evolution of a magma system is that, when a basaltic magma is emplaced in the continental crust, a silicic magma is rapidly formed by the roof melting, and that the magmas evolve very slowly after the temperatures of the magmas become as cool as the fusion temperature of the crust. The major effect of the floor melting would be that the liquid line of descent of the basaltic magma can be greatly modified by mixing with the melt generated at the floor.

  日本地質学会, Sep. 1996, 地質学論集, 46(46) (46), 29 - 41, Japanese

  [Refereed]

• 第8回IAVCEI陥没カルデラワークショップ研究集会報告

  下司 信夫, 後藤 芳彦, 金子 克哉, 三浦 大助, 長谷川 健, 富島 千晴, 柴田 翔平

  Jul. 2024, 火山, 69(2) (2), 79 - 86

  [Refereed]


• Geochemical characteristics of the lava dome at Kikai Caldera and its relationship to the Akahoya eruption magma

  朝田葵, 金子克哉, 羽生毅, 浜田盛久, 清水健二, 牛久保孝行, CHANG Qing

  2024, 日本火山学会講演予稿集, 2024


• Investigating the formation of the Kikai submarine lava dome using matrix glass volatile contents

  MCINTOSH Iona, HAMADA Morihisa, HANYU Takeshi, TEJADA Maria Luisa, MIYAZAKI Takashi, CHANG Qing, VAGLAROV Bogdan, KANEKO Katsuya, KIYOSUGI Koji, NAKAOKA Reina, SUZUKI-KAMATA Keiko, SEAMA Nobukazu

  2023, 日本地球惑星科学連合大会予稿集(Web), 2023


• Isotopes and trace element constraints on magma sources and variability at Kikai Caldera, SW Japan

  TEJADA M.L.G., HANYU T., MIYAZAKI T., HAMADA M., SATO T., SEAMA N., KANEKO K., NAKAOKA R., KIYOSUGI K., SUZUKI-KAMATA K., ISHIZUKA O.

  2023, 日本火山学会講演予稿集, 2023 (Web)


• Universarity and individuality of magmatic processes in three caldera volcano, Aso, Aira, and Kikai volcanoes, SW Japan

  KANEKO Katsuya, NISHIHARA Ayumu, KIKUCHI Ryohei, SHINJO Kento, NISHIMURA Kimihiko, KIMURA Jun-ichi, CHANG Qing, MIYAZAKI Takashi, HANYU Takeshi

  2023, 日本地球惑星科学連合大会予稿集(Web), 2023


• Drilling on the submarine caldera wall of the Kikai Caldera

  羽生毅, 宮崎隆, TEJADA M.L.G., 島伸和, 金子克哉, 中岡礼奈, 清杉孝司, 鈴木桂子, 清水賢, 西来邦章, 佐藤勇輝

  2023, 日本火山学会講演予稿集, 2023 (Web)


• Temporal evolution of silicic magma formation beneath Aira caldera volcano

  西原歩, 西原歩, 西原歩, 金子克哉, CHANG Q., 木村純一, 下司信夫, 宮崎隆, VAGLAROV B.

  2023, 日本火山学会講演予稿集, 2023 (Web)


• Investigating the formation of the Kikai submarine lava dome using matrix glass volatile contents

  MCINTOSH Iona, HAMADA Morihisa, HANYU Takeshi, TEJADA Maria Luisa, MIYAZAKI Takashi, CHANG Qing, VAGLAROV Bogdan, KANEKO Katsuya, KIYOSUGI Koji, NAKAOKA Reina, SUZUKI-KAMATA Keiko, SEAMA Nobukazu

  2022, 日本地球惑星科学連合大会予稿集(Web), 2022


• Late Pleistocene to Holocene dynamic basin environment at the Osaka Bay: Stratigraphic expressions of tectonic deformation, sea level fluctuation, and tidal waves

  HAMAHASHI Mari, OTSUKA Hironori, SUZUKI Yoshiaki, ARIMOTO Jun, YAMAMOTO Yuzuru, YAMAMOTO Yuzuru, SEAMA Nobukazu, SEAMA Nobukazu, BOWDEN Stephen, BOWDEN Stephen, MATSUNO Tetsuo, SUGIOKA Hiroko, SUGIOKA Hiroko, SHIMIZU Satoshi, SHIMIZU Satoshi, IWAMARU Hikaru, IWAMARU Hikaru, SANO Mamoru, SANO Mamoru, SUZUKI Keita, SUZUKI Keita, KANEKO Katsuya, KANEKO Katsuya, NAKAHIGASHI Kazuo, TATSUMI Yoshiyuki

  2022, 日本地球惑星科学連合大会予稿集(Web), 2022


• 鬼界海底カルデラ火山の地質岩石学的研究の進捗状況-溶岩ドーム流紋岩質マグマの温度・圧力の推定を中心として-

  浜田盛久, 羽生毅, 宮崎隆, TEJADA Maria L. G., 上木賢太, VAGLAROV Bogdan S., MCINTOSH Iona, 常青, 鈴木桂子, 金子克哉, 清杉孝司, 中岡礼奈

  2021, 海と地球のシンポジウム発表課題一覧・要旨集(CD-ROM), 2021


• 海底の鬼界アカホヤ噴火堆積物の特徴

  中岡礼奈, 鈴木桂子, 清水賢, 金子克哉, 島伸和, 清杉幸司, 松野哲男, 巽好幸, 羽生毅, 宮崎隆, TEJADA Maria Luisa G., 上木賢太

  2021, 海と地球のシンポジウム発表課題一覧・要旨集(CD-ROM), 2021


• 鬼界海底カルデラにおける物質科学的研究の現状

  清杉孝司, 巽好幸, 鈴木桂子, 金子克哉, 中岡礼奈, 山本由弦, 清水賢, 島伸和, 松野哲男, 菊池瞭平, 山口寛登, 羽生毅

  2021, 海と地球のシンポジウム発表課題一覧・要旨集(CD-ROM), 2021


• Estimation of temperature and pressure of rhyolitic lava dome magma at Kikai caldera

  M. Hamada,, T. Hanyu,, T. Miyazaki,, M. L. G. Tejada,, K. Ueki,, B. S. Vaglarov,, I. McIntosh,, Q. Chang,, K. Suzuki,, K. Kaneko,, K. Kiyosugi,, R. Nakaoka,

  The Volcanological Society of Japan, 2021, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2021, 76 - 76, Japanese


• Geochemical variation of magma at Kikai Caldera volcano recorded in Chikyu SCORE tephra

  Hanyu T., Chang Q., Kaneko K., Suzuki-Kamata K., Nakaoka R., Kiyosugi K., Yamamoto Y., Seama N., Tatsumi Y.

  The Volcanological Society of Japan, 2021, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2021, 75 - 75, Japanese


• Magma formation processes of Aso-2, Aso-3 and Aso-4 eruptions based on melt inclusions study

  Kikuchi Ryohei, Kaneko Katsuya

  The Volcanological Society of Japan, 2021, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2021, 147 - 147, Japanese


• An overview of volcanic rocks from submarine Kikai Caldera

  HANYU Takeshi, SEAMA Nobukazu, TANAKA Satoru, TATSUMI Yoshiyuki, ABE Shunsuke, HAMADA Morihisa, HANYU Tomoko, IWAMARU Hikaru, KADO Souko, KANEKO Katsuya, KIKUCHI Ryohei, KIYOSUGI Koji, MATSUNO Tetsuo, MCINTOSH Iona, MIYAZAKI Takashi, NAKAOKA Reina, OKAMOTO Nobuyuki, ORII Taiki, SHIMIZU Satoshi, SHINTANI Tsuyoshi, SUZUKI-KAMATA Keiko, TEJADA Maria Luisa, UEKI Kenta, VAGLAROV Bogdan Stefanov

  2020, 日本地球惑星科学連合大会予稿集(Web), 2020


• 鬼界海底巨大カルデラ火山における二重カルデラ形成過程の解明-新青丸KS-19-17航海概要報告-

  島伸和, 清杉孝司, 中岡礼奈, 松野哲男, 金子克哉, 清水賢, 鈴木桂子, 岡本信行, 羽入朋子, 井和丸光, 阿部俊輔, 佐野守, 木村純一, 杉岡裕子, 巽好幸, 羽生毅, 新谷毅, 益田晴恵, 亀尾桂, 沖野郷子, 榎正憲, 石塚治

  2020, 海と地球のシンポジウム発表課題一覧・要旨集(CD-ROM), 2020


• Voluminous silicic magma formation for the 30 ka Aira catastrophic caldera-forming eruption: contributions of crust-derived mafic and felsic magmas

  NISHIHARA Ayumu, TATSUMI Yoshiyuki, TATSUMI Yoshiyuki, SUZUKI-KAMATA Keiko, SUZUKI-KAMATA Keiko, KANEKO Katsuya, KANEKO Katsuya, KIMURA Jun-Ichi, CHANG Qing, HINATA Hironobu, MIYAZAKI Takashi, VAGLAROV Bogdan Stefanov

  2019, 日本地球惑星科学連合大会予稿集(Web), 2019


• 火山ガラス組成に基づく鬼界カルデラ海底採取火山灰と幸屋火砕流堆積物の対比

  中岡礼奈, 鈴木桂子, 鈴木桂子, 清水賢, 巽好幸, 巽好幸, 金子克哉, 金子克哉, 清杉孝司, 清杉孝司, 島伸和, 島伸和, 松野哲男, 松野哲男, 西村公宏, 林和輝

  2019, 日本地球惑星科学連合大会予稿集(Web), 2019


• ROVによる鬼界カルデラ海底調査の予察的報告

  清杉孝司, 鈴木桂子, 両角春寿, 両角春寿, 巽好幸, 金子克哉, 中岡礼奈, 佐野守, 清水賢, 井和丸光, 島伸和, 松野哲男, 西村公宏, 林和輝, 堀内美咲

  2019, 日本地球惑星科学連合大会予稿集(Web), 2019


• Melt inclusions surrounded by orthopyroxene layer in olivine phenocryst in the Aso-4 scoria.

  Kikuchi Ryohei, Kaneko Katsuya

  The Volcanological Society of Japan, 2019, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2019, 34 - 34, Japanese


• Sr isotope features between large eruption and small eruption in Aso volcano

  SHINJO Kento, KANEKO Katsuya, KIMURA Junichi, CHANG Qing

  The Volcanological Society of Japan, 2019, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2019, 36 - 36, Japanese


• Genesis of large volume of felsic magma in the 7.3ka Kikai-Akahoya eruption

  Nishimura Kimihiro, Tatsumi Yoshiyuki, Kimura Jun-Ichi, Chang Qing, Suzuki-Kamata Keiko, Kaneko Katsuya, Kiyosugi Koji, NAKAOKA Reina, Hayashi Kazuki

  The Volcanological Society of Japan, 2019, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2019, 49 - 49, Japanese


• Geochemical characteristics of plagioclase phenocrysts in essential clasts of the Iwato eruption

  Nishihara A., Tatsumi Y., Kaneko K., Suzuki-Kamata K., Chang Q.

  The Volcanological Society of Japan, 2019, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2019, 38 - 38, Japanese


• Temporal evolution of processes and conditions of magma genesis at Aso volcano

  KANEKO Katsuya, Koyaguchi Takehiro

  The Volcanological Society of Japan, 2017, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2017, 28 - 28, Japanese


• A3-02 Monitoring of CO_2 concentration of lake water at Lakes Nyos and Monoun using the depth profile of sound velocity change

  Saiki K., Kaneko K., Ohba T., Johroku K.

  The Volcanological Society of Japan, 2015, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 30, Japanese


• A2-04 Measurements of water transparency in Cameroonian volcanic lakes

  Johroku K., Saiki K., Kaneko K., Ohba T.

  The Volcanological Society of Japan, 2015, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2015, 25, Japanese


• カメルーン北西部,ニオス火山の噴火史

  長谷川健, 宮縁育夫, 小林哲夫, AKA Festus, BONIFACE Kankeu, ISSA, MICHE Linus, FILS Salomon, 金子克哉, 大場武, 日下部実, GREGORY Tanyileke, JOSEPH Hell

  2015, 日本地球惑星科学連合大会予稿集(Web), 2015


• O14-06 音波を利用した火山湖探査(口頭発表セッション14 探査II,口頭発表)

  佐伯 和人, 金子 克哉, 大場 武

  10 Sep. 2014, 2014, "O14 - 06", Japanese


• Activities of development of robots for volcanic observation

  KANEKO Katsuya

  Robots for volcanic exploration have been developed and utilized safely to observe some volcanic phenomena during volcanic eruptions. UAV-type robots have been used to obtain picture data. UGV-type robots are expected to develop as stations for continuous volcanic monitoring. In the future, it is hoped that wireless communication technology in volcanic fields will be improved and that those robots will be more useful devices for real-time observation of volcanoes.

  一般社団法人電子情報通信学会, 30 Jul. 2014, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 114(166) (166), 201 - 205, Japanese


• Magma genesis and eruption proces of Aso-4

  金子 克哉

  岩波書店, Jan. 2014, 科学, 84(1) (1), 94 - 96, Japanese


• B1-22 Eruption history of Nyos volcano, northwestern Cameroon : Preliminary report

  Hasegawa T., Miyabuchi Y., Kobayashi T., Aka Festus T., Boniface Kankeu, Kaneko K., Ohba T., Kusakabe M., Tanyileke Gregory, Hell Joseph

  The Volcanological Society of Japan, 02 Nov. 2014, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2014, 66 - 66, Japanese


• P46 Development of mobile sensor for volcanic observation "HOMURA" : Wireless communication with FOMA cell phone

  KANEKO Katsuya, ITO Ko-ichi, ANBE Yu-ichi, IWAHORI Kodai

  Volcanological Society of Japan, 29 Sep. 2013, Programme and abstracts the Volcanological Society of Japan, 2013, 146 - 146, Japanese


• A3-13 Amounts, compositions, and timescales of magmas generated by melting of mafic crust : Effects of initial crustal temperature and injection rate and water content of hot magma

  KANEKO Katsuya

  The Volcanological Society of Japan, 2012, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2012, 46, Japanese


• B3-08 Measurement of CO_2 concentration in Cameroonian volcanic lakes by Sound Velocity Method

  Sanemasa M., Saiki K., Kaneko K., Ohba T., Kusakabe Minoru, Tanyileke G., Hell J. V.

  The Volcanological Society of Japan, 2012, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2012, 89, Japanese


• Water chemistry of lakes Nyos and Monoun, Cameroon

  Ohba Takeshi, Sasaki Yuka, Kusakabe Minoru, Yoshida Yutaka, Ueda Akira, Anazawa Katsuro, Kaneko Katsuya, Yasuo Miyabuchi, F.T. Issa, W Aka, G Fantong, J.V. Tanyileke

  In the middle of 1980s, the explosive discharges of CO2 gas (= limnic eruption) at Lake Nyos and Monoun killed about 1800 of resident around the lakes. The cause of the limnic eruption was the CO2 gas dissolved in lake water. The CO2 gas is originated in a degassing magma. A thermal water containing CO2 gas is expected to be discharged on the floor of lake bottom. The accumulation of the dissolved CO2 gas is brought by the strongly stratified lake water. The investigation on the water chemistry and the elucidation on the formation of stratification is important for the prediction of next limnic eruption.

  GEOCHEMICAL SOCIETY OF JAPAN, 2012, Abstracts of Annual Meeting of the Geochemical Society of Japan, 59, 307, Japanese


• B2-08 Generation processes of silicic and mafic magmas by crustal melting : Investigation of amount, composition, and generation timescale of magma with one-dimensional model

  KANEKO Katsuya

  The Volcanological Society of Japan, 2011, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2011, 85, Japanese


• P11 Development of mobile sensor for volcanic observation "HOMURA" and test campaigns in volcanic fields

  KANEKO Katsuya, ITO Ko-ichi, ANBE Yu-ichi, IWAHORI Kodai

  The Volcanological Society of Japan, 2010, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2010, 103, Japanese


• 3-B14 One dimensional model of production of mafic and silicic magmas in mafic crust by repeated injections of hydrous hot magmas

  KANEKO Katsuya

  The Volcanological Society of Japan, 2010, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2010, 86, Japanese


• P62 MAGMATIC FLUID SUPPLY INTO LAKES NYOS AND MONOUN, AND MITIGATION OF NATURAL DISASTERS IN CAMEROON

  Ohba T., Kusakabe M., Yoshida Y., Kozono T., Suzuki Y., Ichihara M., Saiki K., Kaneko K., Anazawa K., Sugai T., Tsujimura M., Ueda A., Terada A., Miyabuchi Y., Kobayashi T.

  The Volcanological Society of Japan, 2010, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2010, 154, Japanese


• A33 Petrogenesis of silicic and mafic magmas in large pyroclastic eruption cycles at Aso volcano

  KANEKO Katsuya, KOYAGUCHI Takehiro, TAKAHASHI Toshiro

  The Volcanological Society of Japan, 2009, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2009, 33, Japanese


• P16 Development of mobile sensor for volcanic observation "HOMURA"

  KANEKO Katsuya, ITO Ko-ichi, ANBE Yu-ichi

  The Volcanological Society of Japan, 2009, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2009, 116, Japanese


• 水槽の中のマグマ溜まり

  金子克哉

  2008, 人環フォーラム, (22 (Web)) (22 (Web))


• Magma genesis of silicic and mafic magmas in large eruption cycles at Aso volcano

  Kaneko Katsuya, Koyaguchi Takehiro, Takahashi Toshiro

  Mamga genesis of silicic and mafic magmas in three large pyroclasitic eruption cycles at Aso volcano between 150 ka and 90 ka has been investigated on the basis of geochemical data. In each large eruption cycle, the silicic and mafic magmas have identical isotope ratios of Sr so that they were generated from the same source material, whereas they do not have parent-daughter relationships by simple fractionation. Petrogenesis of these two magmas can be explained by partial melting of mafic lower crust due to injection of hot, mantle-derived magma. The mafic magma was produced by fractionation of partial melt with higher degree of lower mafic crust. The silicic magma is partial melt with lower degree of the lower mafic magma. Generation of these two magmas occurred in every large pyroclastic eruption cycle at Aso volcano.

  Japan Association of Mineralogical Sciences, 2008, Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences, 2008, 29 - 29, Japanese


• P13 Experimental Study on Spontaneous Stratification by Piling of Granular Mixtures

  Watanabe Shun-ichi, Yamada Ryo, Kaneko Katsuya

  The Volcanological Society of Japan, 2007, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2007, 43, Japanese


• P99 Observational maneuvers at Oshima Volcano of the Mobile Observatory for Volcanic Explosions, MOVE(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2006 FALL MEETING)

  Taniguchi H., Goto A., Ichihara M., Yamada I., Kaneko K., Shimano T., Maeno F., Kuri M., Ohba T., Kogure M., Inayama N., Kato A., Tsuchida Y., Matsuyama A., Tanaka K.

  The Volcanological Society of Japan, 2006, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2006, 213, Japanese


• 阿蘇火山における大規模および小規模噴火活動の岩石学的特徴

  古川邦之, 金子克哉, 小屋口剛博, 鎌田浩毅

  海洋出版, 2006, 月刊地球, 28(6) (6), 386 - 391, Japanese


• Report of IAVCEI 2004 General Assembly

  NAKADA Setsuya, FURUKAWA Ryuta, NAKAMICHI Haruhisa, ICHIHARA Mie, MORI Toshiya, KANEKO Katsuya, IZHIZUKA Yoshihiro, MANNEN Kazutaka, SAKUYAMA Tetsuya, SHIMANO Taketo

  記事種別: 会議・学会報告・シンポジウム

  The Volcanological Society of Japan, 2005, BULLETIN OF THE VOLCANOLOGICAL SOCIETY OF JAPAN, 50(1) (1), 25 - 30, Japanese


• P47 The Homogeneities and Heterogeneities of the Aso-3 Magma at Aso Volcano, SW Japan : Evidences from Sr, Nd and Pb Isotopic Compositions and Petrological Features(THE VOLCANOLOGICAL SOCIETY OF JAPAN 2005 FALL MEETING)

  Inoue Kazuhisa, Kaneko Katsuya, Yoshikawa Masako, Shibata Tomoyuki, Koyaguchi Takehiro, Furukawa Kuniyuki, Kamata Hiroki

  The Volcanological Society of Japan, 2005, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2005, 147, Japanese


• Long-Term evolution of magma plumbing system in Aso volcano : Hypothesis of barely water-saturated crust

  Kaneko Katsuya, Koyaguchi Takehiro, Furukawa Kuniyuki, Kamata Hiroki

  The Geological Society of Japan, 2005, Annual Meeting of the Geological Society of Japan, 2005, 63, Japanese


• Long-Term Evolution of Magma Plumbing System in Aso Volcano : Systematic depletion of incompatible elements and oxidation

  Furukawa Kuniyuki, Kaneko Katsuya, Koyaguchi Takehiro, Kamata Hiroki

  The Geological Society of Japan, 2005, Annual Meeting of the Geological Society of Japan, 2005, 63, Japanese

  [Refereed]


• Experimental study on the effects of crustal temperature and composition on assimilation with fractional crystallization at the floor of magma chambers (vol 129, pg 155, 2004)

  K Kaneko, T Koyaguchi

  Jun. 2004, JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH, 134(3) (3), 249 - 249, English

  Others


• Petrological Characteristics of Volcanic Ejecta between Large-scaleEruption Cycles in Aso Volcano

  FURUKAWA Kuniyuki, KANEKO Katsuya, KAMATA Hiroki

  The Volcanological Society of Japan, 2003, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2003, 142, Japanese


• デカン洪水玄武岩の印象

  金子克哉

  2002, 人環フォーラム, (12 (Web)) (12 (Web))


• Effects of temperature and composition of the floor of a magma chamber on assimilation with fractional crystallization process

  Kaneko Katsuya, Koyaguchi Takehiro

  The Volcanological Society of Japan, 2000, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 2000.2, 87, Japanese


• Petrological features of ejecta in Aso-4 eruption cycle

  Kaneko Katsuya, Kamata Hiroki, Koyaguchi Takehiro

  The Volcanological Society of Japan, 1999, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1999.2, 124, Japanese


• 70 Characterization of time-space distribution of volcanoes from 14Ma to present in Northeast Japan

  KONDO Hirofumi, TANAKA Kazuhiro, KANEKO Katsuya, TSUCHI Hiroyuki

  The Geological Society of Japan, 1997, Annual Meeting of the Geological Society of Japan, 1997, 139, Japanese


• The evolution of the magma system in the crust : Part 5 Relationship among temperature, saturation water content, and effective fusion temperature of crustal materials

  Kaneko Katsuya, Koyaguchi Takehiro

  The Volcanological Society of Japan, 1996, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1996.2, 30, Japanese


• Experimental Study of Dynamics of Volcanic Eruption

  Kurihara T., Udagawa S., Koyaguchi T., Tomiya A., Kaneko K., Ichihara M.

  The Volcanological Society of Japan, 1995, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1995.2, 116, Japanese


• 3) Evolution of magma system in the crust

  Kaneko Katsuya, Koyaguchi Takehiro

  The Geological Society of Japan, 1995, Annual Meeting of the Geological Society of Japan, 1995, 12, Japanese


• Evolution of magma system in the crust : Part III The role of mush in thermal and mterial transport

  Kaneko Katsuya, Koyaguchi Takehiro

  The Volcanological Society of Japan, 1995, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1995.2, 17, Japanese


• Solidification of Magma : Study based on density variation of magma

  Kaneko Katsuya, Koyaguchi Takehiro

  The Volcanological Society of Japan, 1994, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1994.2, 119, Japanese


• Magmatic Variation of Younger Ontake Volcano

  Katsuya Kaneko

  The Volcanological Society of Japan, 1992, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1992.1, 23, Japanese


• Magma System of Younger Ontake Volcano

  Kaneko Katsuya

  The Volcanological Society of Japan, 1991, PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN, 1991.2, 91, Japanese

• 海底堆積物コアから見た鬼界アカホヤ噴火と鬼界葛原噴火堆積物の特徴

  中岡礼奈, 鈴木桂子, 金子克哉, 島 伸和, 清杉孝司, 山本由弦, 松野哲男, 羽生 毅, 清水 賢, 巽 好幸

  日本火山学会2024年度秋季大会, Oct. 2024, Japanese

  Poster presentation


• 鬼界カルデラにおける溶岩ドームマグマの特徴とアカホヤ噴火マグマとの関係

  朝田 葵, 金子克哉, 羽生 毅, 浜田盛久, 清水健二, 牛久保孝行, 常 青

  日本火山学会2024年度秋季大会, Oct. 2024, Japanese

  Poster presentation


• Lithofacies and rock-magnetic properties of borehole cores drilled on the submarine caldera wall of the Kikai Caldera

  Kuniaki Nishiki, Yuki Sato, Takeshi Hanyu, Takashi Miyazaki, Maria Luisa Tejada, Kenta Ueki, Yoichi Usui, Katsuya Kaneko, Koji Kiyosugi, Keiko Suzuki-Kamata, Reina NAKAOKA, Takeshi Hasegawa, Makoto Okada

  Japan Geoscience Union Meeting 2024, May 2024, Japanese

  Oral presentation


• Evolution of magma plumbing system beneath a submarine lava dome after the 7.3-ka caldera-forming Kikai-Akahoya eruption: An update

  Morihisa Hamada, Takeshi Hanyu, Iona M. McIntosh, Maria Luisa, G. Tejada, Qing Chang, Katsuya Kaneko, Jun-Ichi Kimura, Koji Kiyosugi, Takashi Miyazaki, Reina NAKAOKA, Kimihiro Nishimura, Tomoki Sato, Nobukazu Seama, Keiko Suzuki-Kamata, Satoru Tanaka, Yoshiyuki Tatsumi, Kenta Ueki, Bogdan S. Vaglarov, Kenta Yoshida

  Japan Geoscience Union Meeting 2024, May 2024, Japanese

  [Invited]

  Invited oral presentation


• Petrogenesis of silicic and mafic magma in the Aso volcano on the basis of melt inclusion and groundmass analyses

  Ryohei Kikuchi, Katsuya Kaneko, Oliver Bachmann

  Japan Geoscience Union Meeting 2024, May 2024, Japanese

  Oral presentation


• Generation processes of three silicic pyroclastic flows’ magmas at Kuju volcano and difference of magmatic features between Kuju and Aso volcanoes

  Kazuki Fujimoto, Katsuya Kaneko, Ryohei Kikuchi

  Japan Geoscience Union Meeting 2024, May 2024, Japanese

  Oral presentation


• Evolution of magma toward caldera-forming eruption in Kikai Caldera; melt inclusion study of the submarine core

  Takeshi Hanyu, Katsuya Kaneko, Kenji Shimizu, Takayuki Ushikubo, Junji Yamamoto, Morihisa Hamada, Qing Chang

  Japan Geoscience Union Meeting 2024, May 2024, Japanese

  Oral presentation


• Origin of huge zoned ignimbrites of the Aso volcano based on melt inclusion and groundmass analyses

  Ryohei Kikuchi, Katsuya Kaneko, Olivier Bachmann

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Poster presentation


• Change of magmatic characteristics between the 7.3-ka caldera forming eruption and the post lava dome eruption

  Aoi Asada, Katsuya Kaneko, Takeshi Hanyu, Morihisa Hamada, Kenji Shimizu, Takayuki Ushikubo, Qing Chang

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Poster presentation


• Magma evolution from Tozurahara to Akahoya catastrophic eruptions at Kikai Caldera; a study on marine tephras from the Chikyu SCORE core

  Takeshi Hanyu, Nobukazu Sea, Katsuya Kanek, Qing Chang, Reina Nakaoka, Koji Kiyosugi, Yuzuru Yamamo, Tetsuo Matsuno, Keiko Suzuki-Kama, Yoshiyuki Tatsumi

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Poster presentation


• Investigating the formation of the Kikai submarine lava dome using matrix glass volatile contents

  Iona M. McIntosh, Morihisa Hamada, Takeshi Hanyu, Maria Luisa, G. Teja, Takashi Miyazaki, Qing Chang, Bogdan S. Vaglaro, Katsuya Kaneko, Koji Kiyosugi, Reina Nakaoka, Keiko Suzuki-Kama, Nobukazu Seama

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Oral presentation


• Magma genesis and temporal magmatic evolution in the three caldera volcanoes, Aso, Aira, and Kikai volcanoes, SW Japan

  Katsuya Kaneko, Ayumu Nishihara, Ryohei Kikuchi, Kento Shinjo, Kimihiko Nishimura, Jun-Ichi Kimura, Takeshi Hanyu, Qing Chang, Takashi Miyazaki

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Oral presentation


• Magma sources and variability at Kikai Caldera, SW Japan pre-, synand post calderagenic eruptions

  M. L. G. Tejada, T. Hanyu, T. Miyazaki, M. Hamad, Q. Chang, T. Sato, I. McIntosh, K, Ueki, B. Vaglarov, N. Seama, K. Kaneko, R. Nakaoka, K. Kiyosugi, K. Suzuki-Kamata, Y. Tatsumi, O. Ishizuka

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Oral presentation


• Evolution of magma supply system beneath a submarine lava dome after the 7.3-ka caldera forming Kikai-Akahoya eruption

  Morihisa Hamada, Takeshi Hanyu, Iona M. McIntosh, Maria Luisa G. Tejada, Qing Chang, Katsuya Kaneko, Jun-Ichi Kimura, Koji Kiyosugi, Takashi Miyazaki, Reina Nakaoka, Kimihiro Nishimura, Tomoki Sato, Nobukazu Sea, Keiko Suzuki, Kamata, Satoru Tanaka, Yoshiyuki Tatsum, Kenta Ueki, Bagdan S. Vaglaro, Kenta Yoshida

  International symposium "Submarine caldera volcanoes", Mar. 2024, English

  Poster presentation


• 九重火山における3つの火砕流堆積物に関する岩石学的研究

  藤本和希, 金子克哉, 菊池瞭平

  日本火山学会2023年度秋季大会, Oct. 2023, Japanese

  Poster presentation


• Isotopes and trace element constraints on magma sources and variability at Kikai Caldera, SW Japan

  M. L. G. Tejada, T. Hanyu, T. Miyazaki, M. Hamada, T. Sato, N. Seama, K. Kaneko, R. Nakaoka, K. Kiyosugi, K. Suzuki-Kamata, Kob, O. Ishizuka

  Volcanological Society of Japan 2023 Fall meeting, Oct. 2023, English

  Poster presentation


• 鬼界カルデラの海底カルデラ壁における掘削

  羽生 毅, 宮崎 隆, Maria Luisa Tejada, 島 伸和, 金子克哉, 中岡礼奈, 清杉孝司, 鈴木桂子, 清水 賢, 西来邦章, 佐藤勇輝

  日本火山学会2023年度秋季大会, Oct. 2023, Japanese

  Oral presentation


• Evolution of magma supply system beneath a submarine lava dome after the 7.3-ka caldera-forming Kikai-Akahoya eruption

  西原 歩, 金子克哉, 常 青, 木村純一, 下司信夫, 宮崎 隆, Bogdan Vaglarov

  日本火山学会2023年度秋季大会, Oct. 2023, Japanese

  Oral presentation


• Evolution of magma supply system beneath a submarine lava dome after the 7.3-ka caldera-forming Kikai-Akahoya eruption

  Morihisa Hamada, Takeshi Hanyu, Iona M. McIntosh, Maria Luisa, G. Tejada, Qing Chang, Katsuya Kaneko, Jun-Ichi Kimura, Koji Kiyosugi, Takashi Miyazaki, Reina NAKAOKA, Kimihiro Nishimura, Tomoki Sato, Nobukazu Seama, Keiko Suzuki-Kamata, Satoru Tanaka, Yoshiyuki Tatsumi, Kenta Ueki, Bogdan Stefanov Vaglarov, Kenta Yoshida

  Japan Geoscience Union Meeting 2023, May 2023, Japanese

  Oral presentation


• Investigating the formation of the Kikai submarine lava dome using matrix glass volatile contents

  Iona McIntosh, Morihisa Hamada, Takeshi Hanyu, Maria Luisa Tejada, Takashi Miyazaki, Qing Chang, Bogdan Vaglarov, Katsuya Kaneko, Koji Kiyosugi, Reina Nakaoka, Keiko Suzuki-Kamata, Nobukazu Seama

  Japan Geoscience Union Meeting 2023, May 2023, English


• Major and trace elemental composition of melt inclusions in magmas of Aso-2, Aso-3, and Aso-4 eruptions in Aso volcano

  Ryohei Kikuchi, Katsuya Kaneko, Olivier Bachman

  Japan Geoscience Union Meeting 2023, May 2023, Japanese

  Oral presentation


• Universarity and individuality of magmatic processes in three caldera volcano, Aso, Aira, and Kikai volcanoes, SW Japan

  Katsuya Kaneko, Ayumu Nishihara, Ryohei Kikuchi, Kento Shinjo, Kimihiko Nishimura, Jun-ichi Kimura, Qing Chang, Takashi Miyazaki, Takeshi Hanyu

  Japan Geoscience Union Meeting 2023, May 2023, Japanese

  Oral presentation


• Evolution of magma plumbing system beneath a submarine caldera after the 7.3-ka caldera-forming Akahoya eruption at Kikai volcano, SW Japan

  Morihisa Hamada, Takeshi Hanyu, Iona McIntosh, Maria Luisa Tejada, Qing Chang, Katsuya Kaneko, Jun-Ichi Kimura, Koji Kiyosugi, Takashi Miyazaki, Reina Nakaoka, Kimihiro Nishimura, Tomoki Sato, Nobukazu Seama, Keiko Suzuki-Kamata, Satoru Tanaka, Yoshiyuki Tatsumi, Kenta Ueki, Mr Bogdan Vaglarov

  IAVCEI 2023 Scientific Assembly, Jan. 2023, English

  Oral presentation


• Common and individual magmatic processes in three caldera volcano, Aso, Aira, and Kikai volcanoes, SW Japan

  Katsuya Kaneko, Ayumu Nishihara, Ryohei Kikuchi, Kento Shinjo, Kimihiko Nishimura, Jun-Ichi Kimura, Qing Chang, Takashi Miyazaki, Takeshi Hanyu

  IAVCEI 2023 Scientific Assembly, Jan. 2023, English

  Oral presentation


• 鬼界海底カルデラにおけるアカホヤ噴火以降のマグマ供給系進化

  浜田 盛久, 羽生 毅, Iona M. McIntosh, Maria Luisa, G. Tejada, 常 青, 金子 克哉, 木村 純一, 清杉 孝司, 宮崎 隆, 中岡 礼奈, 西村 公宏, 佐藤 智紀, 島 伸和, 鈴木 桂子, 田中 聡, 巽 好幸, 上木 賢太, Bogdan S. Vaglarov

  日本火山学会2022年秋季大会, Oct. 2022, Japanese

  Oral presentation


• 海底掘削試料から明らかになった鬼界カルデラ火山噴出物の特徴

  中岡 礼奈, 金子 克哉, 島 伸和, 鈴木 桂子, 清杉 孝司, 羽生 毅, 山本 由弦, 松野 哲男, 清水 賢, 杉岡 裕子, 巽 好幸

  日本地球化学会年会, Sep. 2022, Japanese

  [Invited]

  Invited oral presentation


• Investigation of subaerial and submarine deposits of pyroclastic density currents: A case study at Kikai volcano, SW Japan

  清杉孝司, 出口翔太, 金子克哉, 鈴木桂子, 中岡礼奈, 清水賢, 島伸和, 巽好幸, 羽生毅

  Japan Geoscience Union Meeting 2022, May 2022, Japanese


• Evolution of magma plumbing system in Aso caldera volcano: oxidation by mantle-derived magma

  金子克哉, 小屋口剛博

  Japan Geoscience Union Meeting 2022, May 2022, Japanese


• Late Pleistocene to Holocene dynamic basin environment at the Osaka Bay: Stratigraphic expressions of tectonic deformation, sea level fluctuation, and tidal waves

  浜橋真理, 大塚宏徳, 鈴木克明, 有元純, 山本由弦, 島伸和, Bowden Stephen, 松野哲男, 杉岡裕子, 清水賢, 井和丸光, 佐野守, 鈴木啓太, 金子克哉, 中東和夫, 巽好幸

  Japan Geoscience Union Meeting 2022, May 2022, Japanese

  Oral presentation


• 海の巨大カルデラ火山の仕組みを探るー鬼界火山の総合研究

  金子 克哉

  J-DESCシンポジウム「地球掘削科学の近未来の課題：人新世の未来に向けて」, Mar. 2022

  [Invited]

  Nominated symposium


• 鬼界海底カルデラ火山の溶岩ドーム流紋岩質マグ マの温度・圧力の推定

  浜田盛久, 羽生 毅, 宮崎 隆, Maria Tejada, 上木賢太, Bogdan Vaglarov, Iona McIntosh, 常 青, 鈴木 桂子, 金子克哉, 清杉孝司, 中岡 礼奈

  日本火山学会2021年秋季大会, Oct. 2021, Japanese

  Oral presentation


• 鬼界カルデラ火山のマグマ変化－ちきゅう SCORE 試料より

  羽生 毅, 常 青, 金子克哉, 鈴木桂子, 中岡礼奈, 清杉孝司, 山本由弦, 松野哲男, 島 伸和, 巽 好幸

  日本火山学会2021年秋季大会, Oct. 2021, Japanese

  Oral presentation


• メルト包有物分析に基づく Aso-2、Aso-3、Aso-4 噴火のマグマ形成過程

  菊池瞭平, 金子克哉

  日本火山学会2021年秋季大会, Oct. 2021, Japanese

  Poster presentation


• Comparison of subaerial and submarine deposits from the Kikai Akahoya eruption

  中岡 礼奈, 鈴木 桂子, 清水 賢, 金子 克哉, 島 伸和, 清杉 孝司, 羽生 毅, 巽 好幸, Leg, 乗船研究者一同, 乗船研究者一同, 乗船研究者一同

  JpGu-AGU Joint Meeting 2021, Jun. 2021, Japanese

  Oral presentation


• Shallow structure and late Quaternary slip rate on the Osaka Bay Fault: Aspects of climate-tectonic interaction

  浜橋 真理, 大塚 宏徳, 鈴木 克明, 有元 純, 松野 哲男, 清水 賢, 井和丸, 佐野 守, 鈴木 啓太, 金子 克哉, 中東 和夫, 日高 伊都子, 山本 由弦, 巽 好幸

  JpGu-AGU Joint Meeting 2021, Jun. 2021, Japanese

  Oral presentation


• An emplacement mechanism of submarine pyroclastic products: insight form the seismic studies on Kikai caldera

  清水 賢, 島, 伸, 中岡 礼奈, 鈴木 桂子, 清杉 孝司, 金子 克哉, 松野 哲男, 巽 好幸

  JpGu-AGU Joint Meeting 2021, Jun. 2021, Japanese

  Oral presentation


• Drilling of Kikai caldera volcano for elucidation of magma plumbing system and flow-deposition processes of large ignimbrite

  金子 克哉, 羽生 毅, 中岡 礼奈, 清杉 孝司, 島 伸和, 松野 哲男, 山本 揚二朗, 羽入 朋子

  JpGu-AGU Joint Meeting 2021, Jun. 2021, Japanese

  [Invited]

  Invited oral presentation


• Contrasting volcano spacing along SW Japan arc caused by difference in age of subducting lithosphere

  松本 拓己, 好, 末永 伸明, 吉岡 祥一, 金子 克哉

  JpGu-AGU Joint Meeting 2021, Jun. 2021, Japanese

  [Invited]

  Invited oral presentation


• Silicic magma formations in the Aira caldera region during the last 100,000 years inferred from geochemical characteristics of plagioclase

  西原 歩, 金子 克哉, 常, 青, 下司 信夫

  JpGu-AGU Joint Meeting 2021, Jun. 2021, Japanese

  Oral presentation


• Petrogenesis of Nekodake magma in Aso volcano

  角 想子, 金子 克哉

  Japan Geoscience Union Meeting 2021, Jun. 2021, Japanese

  Oral presentation


• An overview of volcanic rocks from submarine Kikai Caldera

  羽生 毅, 島 伸和, 田中 聡, 巽 好幸, 阿部 俊輔, 浜田 盛久, 羽入 朋子, 井和丸 光, 角 想子, 金子 克哉, 菊池 瞭平, 清杉 孝司, 松野 哲男, McIntosh Iona, 宮崎 隆, 中岡 礼奈, 岡本 信行, 織井 大樹, 清水 賢, 新谷 毅, 鈴木 桂子, Tejada Maria Luisa, 上木 賢太, Vaglarov, Bogdan S

  JpGu-AGU Joint Meeting 2020, Jul. 2020, English

  Poster presentation


• Preliminary report of marine sediments drilled and cored by D/V Chikyu at Kikai volcano, SW Japan

  清杉 孝司, 巽 好幸, 鈴木 桂子, 金子 克哉, 中岡 礼奈, 山本 由弦, 羽生 毅, 清水 賢, 島 伸和, 松野 哲男, 菊池 瞭平, 山口 寛登

  JpGu-AGU Joint Meeting 2020, Jul. 2020, English

  Poster presentation


• Seismic facies and distribution of submarine pyroclastic deposits originated from multiple large-scale eruptions of Kikai caldera

  Satoshi Shimizu, Reina NAKAOKA, Nobukazu Seama, Tomoko Hanyu, Keiko Suzuki-Kamata, Koji Kiyosugi, Katsuya Kaneko, Tetsuo Matsuno, Hikaru Iwamaru, Takeshi Hanyu, Shunsuke Abe, Nobuyuki Okamoto, Yoshiyuki Tatsumi

  JpGu-AGU Joint Meeting 2020, Jul. 2020, English

  Poster presentation


• Petrological and geochemical features between large and small eruptions in Aso volcano

  Kento Shinjo, Katsuya Kaneko, Jun-ichi Kimura, Qing Chang

  JpGU-AGU Joint Meeting2020, Jul. 2020, English


• Three types of magmas relating to production of the Aso-4 mafic magma: a melt inclusions approach.

  Ryohei Kikuchi, Katsuya Kaneko

  JpGu-AGU Joint Meeting 2020, Jul. 2020, English

  Poster presentation


• Genesis of andesite and rhyolite magmas prior to the 30ka Aira catastrophic caldera-forming eruption

  Ayumu Nishihara, Yoshiyuki Tatsumi, Katsuya Kaneko, Qing Chang, Nobuo Geshi, Keiko Suzuki

  JpGu-AGU Joint Meeting 2020, Jul. 2020

  Poster presentation


• Control of volcanic activity by crustal structure: Inference from the Izu-Bonin-Mariana and Northeast Japan arcs

  Katsuya Kaneko, Kenta Mishiro, Yoshiyuki Tatsumi

  2019 Fall meeting, American Geophysical Union, Dec. 2019, English

  Oral presentation


• Magma plumbing system for the 30 ka Aira catastrophic caldera-forming eruption, Southwest Japan: contributions of crust-derived mafic and felsic magmas

  Ayumu Nishihara, Yoshiyuki Tatsumi, Katsuya Kaneko, Jun-Ichi Kimura, Keiko Suzuki-Kamata, Qing Chang, Takashi Miyazaki, Bogdan Vaglarov

  2019 Fall meeting, American Geophysical Union, Dec. 2019, English

  Poster presentation


• Flow and depositional processes of the Koya Pyroclastic Flow formed by the Kikai caldera-forming eruption at 7.3 ka

  Reina Nakaoka, Keiko Suzuki-Kamata, Satoshi Shimizu, Nobukazu Seama, Katsuya Kaneko, Koji Kiyosugi, Tetsuo Matsuno, Yoshiyuki Tatsumi

  2019 Fall meeting, American Geophysical Union, Dec. 2019, English

  Oral presentation


• Genesis of large volume of felsic magma in the 7.3 ka Kikai-Akahoya eruption

  Kimihiro Nishimura, Yoshiyuki Tatsumi, Jun-ichi Kimura, Qing Chang, Keiko Suzuki, Katsuya Kaneko, Koji Kiyosugi, Reina Nakaoka, Kazuki Hayashi

  2019 Fall meeting, Volcanological Society of Japan, Sep. 2019, Japanese

  Oral presentation


• Geochemical characteristics of plagioclase phenocrysts in essential clast of the Iwato eruption

  Ayumu Nishihara, Yoshiyuki Tatsumi, Katsuya Kaneko, Keiko Suzuki, Qing Chang

  2019 Fall meeting, Volcanological Society of Japan, Sep. 2019, Japanese

  Oral presentation


• Sr isotope features between large eruption and small eruption in Aso volcano

  Kento Shinjo, Katsuya Kaneko, Jun-ichi Kimura, Qing Chang

  2019 Fall meeting, Volcanological Society of Japan, Sep. 2019, Japanese

  Oral presentation


• Melt inclusions surrounded by orthopyroxene layer in olivine phenocryst in the Aso-4 scoria

  Ryohei Kikuchi, Katsuya Kaneko

  2019 Fall meeting, Volcanological Society of Japan, Sep. 2019, Japanese

  Oral presentation


• 鬼界カルデラ・アカホヤ噴火の水中火砕流の分布

  Satoshi Shimizu, Nobukazu Seama, Reina Nakaoka, Tetsuo Matsuno, Koji Kiyosugi, Hikaru Iwamaru, Mamoru Sano, Kimihiro Nishimura, Keiko Suzuki-Kamata, Katsuya Kaneko, Hiroto Yamaguchi, Misaki Horiuchi, Toki Hirose, Kazuki Hayashi, Yoshiyuki Tatsumi

  Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conference

  Oral presentation


• Identification of submarine volcanic ash around the Kikai caldera with the Koya pyroclastic flow deposit inferred from glass composition

  Reina Nakaoka, Keiko Suzuki-Kamata, Satoshi Shimizu, Yoshiyuki Tatsumi, Katsuya Kaneko, Koji Kiyosugi, Nobukazu Seama, Tetsuo Matsuno, Kimihiro Nishimura, Kazuki Hayashi

  Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conference

  Oral presentation


• Summary of Kikai submarine caldera researches conducted by KOBEC(Kobe Ocean-Bottom Exploration Center)

  Nobukazu Seama, Tetsuo Matsuno, Koji Kiyosug, Satoshi Shimizu, Reina Nakaoka, Keiko Suzuki-Kamata, Yasutomo Seto, Mamoru Sano, Yuiko Morita, Hikaru Iwamaru, Haruhisa Morozumi, Misaki Horiuchi, Kimihiro Nishimura, Hiroshi Ichihara, Kazuki Hayashi, Toki Hirose, Katsuya Kaneko, Hiroto Yamaguchi, Yuki Okizono, Hiroko Sugioka, Kazuo Nakahigashi, Yojiro Yamamoto, Tatsuya Koda, Shuichi Kodaira, Yoshiyuki Tatsumi, Scientific Party of T, S Fukae-maru, Kikai caldera, research cruises

  Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conference

  Oral presentation


• Voluminous silicic magma formation for the 30 ka Aira catastrophic caldera-forming eruption: contributions of crust-derived mafic and felsic magmas

  Ayumu Nishihara, Yoshiyuki Tatsumi, Keiko Suzuki-Kamata, Katsuya Kaneko, Jun-Ichi Kimura, Qing Chang, Hironobu Hinata, Takashi Miyazaki, Bogdan Stefanov Vaglarov

  Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conference

  Oral presentation


• Preliminary report of the sea floor survey by a remotely operatedvehicle (ROV) at the Kikai caldera, SW Japan

  Koji Kiyosugi, Keiko Suzuki-Kamata, Haruhisa Morozumi, Yoshiyuki Tatsumi, Katsuya Kaneko, Reina Nakaoka, Mamoru Sano, Satoshi Shimizu, Hikaru Iwamaru, Nobukazu Seama, Tetsuo Matsuno, Kimihiro Nishimura, Kazuki Hayashi, Misaki Horiuchi

  Japan Geoscience Union Meeting 2019, May 2019, Japanese, Makuhari Messe, Chiba, Domestic conference

  Oral presentation


• Contributions of crust-derived mafic/intermediate and felsic magmas to the Aira catastrophic caldera-forming eruption inferred from geochemical characteristics of essential clasts

  西原 歩, 巽 好幸, 鈴木 桂子, 金子 克哉, 木村 純一, 常 青, 日向 宏伸

  日本地球惑星科学連合2018年大会, May 2018, Japanese, 幕張メッセ, Domestic conference

  Oral presentation


• Temporal evolution of processes and conditions of magma genesis at Aso volcano

  KANEKO KATSUYA, 小屋口 剛博

  2017 Fall meeting of Japan volcanological society, Sep. 2017, Japanese, Kumamoto University, Temporal transition of magmatic features of Aso volcano during several ten years with three large pyroclastic eruption is elucidated. On the basis of it, a model of magma plumbing system for Aso volcano is proposed., Domestic conference

  Invited oral presentation


• Difference in erupted magma volume inferred from the crustal density structures of the Izu-Bonin-Mariana arc and the northeast Honshu arc

  三宅 健太, TATSUMI YOSHIYUKI, KANEKO KATSUYA

  JpGU-AGU Joint Meeting 2017, May 2017, Japanese, Makuhari Messe, Chiba, Hypothesis on mechanisms governing erupting volume and composition of magma in the Izu-Bonin-Mariana arc and the Northeastern Japan arc is proposed on the basis of estimation of crustal density structures in the two arcs., International conference

  Oral presentation


• Development of mobile sensor for volcanic observation “HOMURA”: operation at Kirishima Iwo-yama and test for a long-term operation at Kyoto University

  KANEKO KATSUYA, IWAHORI KODAI, ITO KOICHI, SAGI HIROTARO

  JpGU-AGU Joint meeting 2017, May 2017, Japanese, Makuhari Messe, Chiba, It is reported results of test campagins of "Homura", a robot for volcanic exploration, in real volcanic field, and usefulness of it., Domestic conference

  Oral presentation


• Magma plumbing system of the Aso-3 large pyroclastic eruption cycle at Aso volcano, Southwest Japan: petrological constraint on the formation of a compositionally stratified magma chamber

  Katsuya KANEKO, Kazuhisa INOUE, Takehiro KOYAGUCHI, Masako YOSHIKAWA, Tomoyuki SHIBATA, Toshiro TAKAHASHI, Kuniyuki FURUKAWA

  American Geophysical Union 2015 Fall meeting, Dec. 2015, English

  Oral presentation


• Development of mobile sensor for volcanic observation “HOMURA”: Test campaign at Kirishima Iwo-yama, SW Japan

  KANEKO Katsuya

  American Geophysical Union 2015 Fall meeting, Dec. 2015, English

  Oral presentation


• Development of mobile sensor for volcanic observation “HOMURA”-Test campaign at Kirishima Iwo-yama

  Katsuya KANEKO, Ko-ichi ITO, Kodai IWAHORI, Yu-ichi ANBE, Hirotaro Sagi

  Programme and abstracts: The Volcanological Society of Japan 2015 fall meeting, Sep. 2015, Japanese

  Oral presentation


• Magma plumbing system of the Aso-3 large pyroclastic eruption cycle at Aso volcano, Southwest Japan: petrological constraint on the formation of a compositionally stratified magma chamber

  Katsuya KANEKO, Kazuhisa INOUE, Takehiro KOYAGUCHI, Masako YOSHIKAWA, Tomoyuki SHIBATA, Toshiro TAKAHASHI, Kuniyuki FURUKAWA

  Programme and abstracts: The Volcanological Society of Japan 2015 fall meeting, Sep. 2015, Japanese

  Oral presentation


• Monitoring of CO2 concetration of lake water at Lakes Nyos and Monoun using the depth profile of sound velocity change

  Kazuto Saiki, Katsuya Kaneko, Takeshi OHBA, Keisuke Johroku

  Fall meeting 2015, the Volcanological Society of Japan, Sep. 2015, Japanese, Domestic conference

  Oral presentation


• Measurements of water transparency in Cameroonian volcanic lakes

  Keisuke Johroku, Kazuto Saiki, Katsuya Kaneko, Takeshi Ohba

  Fall meeting 2015, the Volcanological Society of Japan, Sep. 2015, Japanese, Domestic conference

  Oral presentation


• Activities of development of robots for volcanic observation

  KANEKO Katsuya

  Abstracts of the Institute of Electronics, Information and Communication Engineers, Aug. 2014, Japanese

  Oral presentation


• Development of mobile sensor for volcanic observation “HOMURA”: wireless communication with FOMA

  Katsuya KANEKO, Ko-ichi ITO, Kodai IWAHORI, Yu-ichi ANBE

  Japan Geoscience Union Meeting 2014, May 2014, Japanese, Domestic conference

  Poster presentation


• One dimensional physical model on crustal melting by repeated injections of hot magmas into lower crust

  KANEKO Katsuya

  The fifth collapsed caldera workshop, Jan. 2014, English, International conference

  Poster presentation


• Development of mobile sensor for volcanic observation “HOMURA”: wireless communication with FOMA

  Katsuya KANEKO, Ko-ichi ITO, Yu-ichi ANBE, Kodai IWAHORI

  Fall meeting 2013, the Volcanological Society of Japan, Oct. 2013, Japanese, Domestic conference

  Poster presentation


• Generation processes of magmas of large pyroclastic eruption cycles at Aso volcano, SW Japan

  Katsuya Kaneko, Takehiro Koyaguchi

  2013 IAVCEI General Assembly, Jul. 2013, English, International conference

  Keynote oral presentation


• Amount, composition and timescale of magmas generated by melting in lower crust

  KANEKO Katsuya

  2013 IAVCEI General Assembly, Jul. 2013, English, International conference

  Poster presentation


• Amount, composition, and generation timescale of magma produced by melting of lower crust

  KANEKO Katsuya

  日本地球惑星連合2013年度連合大会, May 2013, Japanese, Domestic conference

  Poster presentation


• Amounts, compositions, and timescales of magmas generated by melting of mafic crust: Effects of initial crustal temperature and injection rate and water content of hot magma

  KANEKO Katsuya

  Fall meeting 2012, the Volcanological Society of Japan, Oct. 2012, Japanese, Domestic conference

  Oral presentation


• Amount and Timescale of Magmas Generated by Crustal Melting:Insights through 1-D Physical Model

  KANEKO Katsuya

  AOGS 9th Annual General Meeting, Aug. 2012, English, International conference

  Invited oral presentation


• Effects of relationship between temperature and melt fraction of crustal rock on magma generation by crustal melting

  KANEKO Katsuya

  Japan Geoscience Union Meeting 2012, May 2012, Japanese, 日本地球惑星科学連合, Domestic conference

  Invited oral presentation


• One dimensional model on crustal melting by injections of hot magmas into continental crust

  KANEKO Katsuya

  American Geophysical Union 2011 Fall Meeting, Dec. 2011, English, International conference

  Poster presentation


• Amounts, compositions, and timescales of magmas generated by melting of mafic crust: Effects of initial crustal temperature and injection rate and water content of hot magma

  KANEKO Katsuya

  Fall meeting 2011, the Volcanological Society of Japan, Oct. 2011, Japanese, Domestic conference

  Oral presentation


• One dimensional model on crustal melting by injections of hot magmas into continental crust

  KANEKO Katsuya

  Japan Geoscience Union Meeting 2011, May 2011, Japanese, Domestic conference

  Oral presentation


• 阿蘇火山の大規模噴火における珪長質および苦鉄質マグマの成因

  金子克哉, 小屋口剛博, 高橋俊郎

  日本鉱物学会2008年度年会, Sep. 2008, Japanese, 日本鉱物学会, Domestic conference

  Invited oral presentation


• 阿蘇火山におけるマグマ供給系 の長期的進化 ―系統的な不適合元素の枯渇と酸化―

  古川邦之, 金子克哉, 小屋囗剛愽, 鎌田浩毅

  日本地質学会2005 年度秋季 大会、京都大学, 2005, Japanese


• 伊豆大島三原山における無人火山探査車MOVE の運用試験

  谷口宏充, 後藤章夫, 久利美和, 市原美恵, 前野深, 嶋野岳人, 金子克哉, 山田功夫

  (科学研究費 特定領域研究「マグマ爆発のダイナミクス」2006 年度報告書), Japanese

• 日本情報地質学会


• 日本岩石鉱床学会


• American Geophysical Union


• 日本火山学会

• Elucidation of magma plumbing system beneath caldera volcanoes on the basis of comparative studies on three caldera volcanoes in Kyushu, Japan

  金子 克哉, 鈴木 桂子, 木村 純一, 巽 好幸, 中岡 礼奈, 谷 健一郎, 清杉 孝司

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Grant-in-Aid for Scientific Research (A), Kobe University, Apr. 2019 - Mar. 2024

  カルデラ火山は，大陸地殻を持つ火山帯に普遍的に存在し，大量の大規模珪長質マグマを生産・噴出し，広範囲に壊滅的な被害をもたらすこともある．加えて，地球科学の基本問題である大陸地殻の形成と進化に直接関わっており重要な研究対象である． 2021年度でも引き続き，九州の阿蘇，姶良，鬼界の3つのカルデラ火山のマグマ発生に関わる岩石学的，地球科学的研究を行うとともに，それらの研究により得られたデータから噴火現象に関わる火山学的な検討も行った．阿蘇火山では，噴出物斑晶中のメルトインクルージョンの分析を主として行い，これまで得られていたメルトインクルージョンに基づくマグマの多様性を整理し，結論として阿蘇のマグマは，熱源となったマントルで生成したマグマと下部地殻溶融のマグマの2種類が本質であることを明らかにした．さらに，熱源マグマの水量が多いこと，また，大量の珪長質マグマの起源物質である下部地殻は含水量が少ないことを明らかにした．姶良火山では，噴出物の同位体組成および微量元素組成の分析を主として行い，珪長質マグマが生成した下部地殻の岩石学的条件を明らかにするとともに，噴出に直接かかわった浅部マグマ溜まりでの地殻同化過程を明らかにした．また，3万年前の大規模噴火後にマグマ供給系の条件が大きく変化したことを明らかにした．鬼界火山では，7300年前の大規模噴火の海底化の火砕流分布を岩石学的研究と地震学的研究から明らかにし，精密な体積見積もりを行い，先研究で見積もられた倍の海底火砕流堆積物が存在していたことを明らかにした．また，3回の大規模噴火の毎に，マグマ供給系が大きく変わり，大規模噴火が終了するとマグマの性質が変化し，次の大規模噴火のマグマ性質へと変化する可能性が明らかになった．


• マグマ生成から噴火へーメルト包有物からの新展開

  羽生 毅, 清水 健二, 金子 克哉, 木元 克典, 山本 順司, 石塚 治

  日本学術振興会, 科学研究費助成事業, 基盤研究(B), 国立研究開発法人海洋研究開発機構, 01 Apr. 2020 - 31 Mar. 2023

  本研究の目的は、火山岩試料の斑晶鉱物に含まれるメルト包有物の揮発性成分と固体元素の組成を測定することにより、マグマ生成から噴火に至る過程における揮発性成分の挙動を調べることである。そのために、島弧火山や海洋島火山の火山岩を対象として、研究に適した斑晶鉱物を含む岩石試料を選別した。所属機関の方針により、出張をして野外調査を実施することが困難であったため、既存の岩石より研究に用いる試料を選んだ。本年度は、海洋島玄武岩としてセントヘレナ島とオントンジャワ海台の試料、島弧火山として鬼界カルデラの試料から選別した。これらについて、全岩化学組成のデータがそろっていない試料について、その主成分や微量成分組成の測定を行った。また、メルト包有物試料を準備するために、各試料を粗く粉砕した後に鉱物を精選した。実体顕微鏡下で鉱物を観察し、比較的大きい（３０ミクロン以上）メルト包有物を含んでいる鉱物をハンドピックして集めた。観察の結果、鬼界カルデラの試料のメルト包有物は均質なガラス質になっているが、セントヘレナやオントンジャワの試料は徐冷したために微細な二次鉱物が成長していることが分かった。後者については、加熱ステージを用いてメルト包有物の均質化を行う必要があるため、そのための準備として鉱物試料の両面研磨作業を行った。両面研磨や加熱ステージを用いた均質化には繊細な作業が求められるため、これらをルーチン的に行えるようにするために、実験室や器具の整備、加熱ステージの最適化を行った。並行して、次年度以降マイクロラマン分光、X線CT、二次イオン質量分析、レーザーアブレーションICP-MS分析を微小なメルト包有物に対して行うために、分析条件の最適化や試験的な分析を行った。これらと合わせて、マントル由来の揮発性成分等の先行研究に関して文献調査をし、既存のデータのコンパイルを行った。


• Development of a mobile sensor for volcanic observation "HOMURA"

  Kaneko Katsuya, ITO Koichi, ANBE Yuichi, IWAHORI Kodai, SAGI Hirotaro

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Challenging Exploratory Research, Kyoto University, 01 Apr. 2015 - 31 Mar. 2017

  We have been developing a practical unmanned-ground-vehicle-type robot for volcanic observation, “HOMURA”, that carries out monitoring near active craters. Homura can obtain pictures of crater and data of sensors in real time with data communication of cellular phone. In this study, we newly did installation of volcanic gas sensors, improvement of softwares for HOMURA, and installation of a solar panel so that we more efficiently use HOMURA for a long time. We also carried out two test campaigns at a natural volcanic field (Kirishima-Iwoyama), and confirmed that HOMURA is stably operated and useful. We will continue volcanic observation by HOMURA.


• Development of a data transfer core system for volcano observation using cellphone network

  SAIKI Kazuto, KANEKO Katsuya

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Challenging Exploratory Research, Osaka University, 2011 - 2013

  When we operate volcano-observation robot, the key technology is mutual data transfer between a operator and a robot. In this research, we developed a data transfer core system for volcano observation using cellphone network by adding software and additional hardware. The operator sends commands to the observation robot and the robot sends observed data to the operator through the data transfer core system. We set the system to our unmanned aerial vehicle (UAV) and unmanned ground vehicle (UGV) and carried out field tests of the system at Izu-Oshima to prepare the next eruption of Izu-Oshima volcano.


• Magma generation processes by crustal melting at subduction zone with continental crust

  KANEKO Katsuya

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Kyoto University, 2011 - 2013

  We carried out numerical experiments of magma genesis by crustal melting on the basis of physical model where hot magmas injecting into crust repeatedly melt the crust and produce magmas, in order to clarify amount, composition, and generation timescale of magma produced by crustal melting and understand variety of igneous activities in continental margin. The results of the numerical experiments indicate that (1) the initial crustal temperature and injection rate of the hot magmas govern total amount of crustal melt, (2) composition of crustal melt is dominantly affected by the initial crustal temperature and injection thickness of the hot magma, and (3) generation timescale for magmas with more than 1 km3 volume is several ten thousands years. These results are consistent with features of natural igneous activity.


• Field experiments of MOVE for the construction of robot system for volcano observation

  TANIGUCHI Hiromitsu, GOTO Akio, UEKI Sadato, NAGATANI Keisi, KANEKO Katsuya, NISHIMURA Takeshi, OSHIMA Hiromitsu, ICHIHARA Mie, SAIKI Kazuto

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Tohoku University, 2007 - 2009

  We are aiming at the development of the robotic system that can observe the volcano by wireless control in a near future. For that purpose, we developed MOVE (Mobile Observatory for Volcanic Explosions) based on Grant-in-Aid for Scientific Research on Priority Areas "Volcanic Explosion" that had ended in 2002 fiscal year. This MOVE is improved in the present study for the achievement of the robotic system. In addition, we tried to clarify various problems for development and the solutions based on the field experiment of MOVE. The vegetation and geographical barriers became the troubles when MOVE was used on an actual volcano, and the problem occurred in the wireless control. To avoid this, the base station vehicle was produced in the present study. The wireless machine and the extensible antenna, etc. were installed in the base station car. Next, we selected the volcanoes they were able to be applied actually. The selection was judged based on the possibility of volcanic eruption and the absence of trouble in wireless control. The trouble to the wireless was judged by the examination using the geographical software (KASHMIR) and the site investigation. As a result, two volcanoes (the Aso volcano and the Oshima volcano) were selected for the field experiment. Running and observation experiments in the field were performed twice (March and October, 2009) at these two volcanoes. In these experiments, the wireless control became possible by moving the base station at the points where the wireless control was impossible in the experiment before. As a result, the transport of MOVE from a point parting at about 2km to the summit crater succeeded by the wireless control at the Aso volcano and the Miharayama volcano. Moreover, at the Miharayama experiment, we exchanged the information with the robot researcher in a different field like the engineering system etc. and obtained useful information for the robotic system construction in the future. However, to use the robotic system for the progress in science and disaster prevention, it was clarified that a lot of problems were left such as an increase in the capital, the number of researchers and the construction of operation organization.


• Study on magma plumbing system of Aso volcano by methods of mare drilling isotope analysis

  KANEKO Katsuya, YOSHIKAWA Masako, TAKAHASHI Toshiro, SHIBATA Tomoyuki, KOYAGUCHI Takehiro, KAMATA Hiroki

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Kyoto University, 2005 - 2007

  Activities of Aso volcano are characterized by four large pyroclastic eruption cycles (LPEC) and many minor eruptions between them after 300 ka. In order to understand magma genesis of Aso volcano, we investigated petrological and geochemical features of magmas of three large eruption cycles between 150 ka and 90 ka. It is emphasized that systematic data of Sr isotope ratio of whole-rock, glass, and plagioclase phenocryst (micro-drilling method) have been obtained. In each LPEC, the magmas erupted from a layered magma chamber with silicic magmas overlying denser mafic magmas. Important geochemical features of silicic and mafic magmas are summarized as follows. 1. Whole-rock Ni content of a silicic magma is equal to or larger than that of a mafic magma in each large eruption cycle. 2. Silicic and mafic magmas in each LPEC have identical Sr isotope ratios in whole-rock, glass, and plagioclase phenocryst. 3. Magmas of the three LPECs have different Sr isotope ratios. 4. Water content of mafic magma is larger than that of silicic magma at least in Aso-2 and Aso-3. 5. petrological features of magmas of Aso volcano systematically change with time : magmatic temperature decreases, K2O content to SiO2 content decreases, oxygen fugacity increases. The feature 3 indicates that the magmas of each LPEC were produced by distinct processes from those of magma generation of the other LPECs. The feature 2 strongly suggests that the silicic and mafic magmas of each LPEC are from a same source material. On the other hand, the feature 1 indicates the silicic magma was not generated by fractionation of the mafic magma. These geochemical data request that the silicic and mafic magmas of each LPEC were generated from a same source material whereas they have no parent-daughter relationship on fractionation. The magma genesis of these silicic and mafic magmas can be explained qualitatively as follows. The source material is a gabbro. The mafic magma was produced by fractional crystallization of segregated partially-molten magma from the gabbro with high degree of partial melting and then fractional crystallization. The silicic magma was generated as segregated partially-molten magma from the gabbro with low degree of partial melting that was not fractionated after segregation. Magma generation of partial melting of a gabbro probably occurs in a lower crust : hot magmas from mantle rise and heat up the lower crust. The mafic magma is produced near the hot mantle magma. The silicic magma is generated by low degree of partial melting of the lower crust relatively far from the mantle magma. The feature 5 is explained by increase of water content in lower crust (i.e., source material of magma).


• 地殻内マグマ溜りにおける固液共存状態にあるマグマの二重拡散対流過程の解明

  金子 克哉

  日本学術振興会, 科学研究費助成事業, 若手研究(B), 京都大学, 2003 - 2004

  地殻内マグマ溜りにおける固液共存状態にあるマグマ溜りの二重拡散対流過程の解明を行うため,液相のみにおける二重拡散対流における混合の実験を行った.液中の組成の垂直プロファイルを精度良く測定することが必要となるため,本年度新たに,電気伝導度を利用して連続的に精度良く組成プロファイルを測定できる装置を新たに開発した.実験では,前年度開発した装置により,水槽中に塩水を入れ,下面より,対流プリュームの径および間隔を制御して上部塩水より低密度液を注入すし,これにより起こる組成対流により,液の混合効率を測定する.重要な結果は,以下の通りである.(1)プリューム間隔がある値以下の場合,その他の条件が混合効率に影響を与えない.(2)プリューム間隔がある値以上の場合,混合効率と注入流量の関係は単調な関数になるのではなく,注入流量の増大とともに,混合効率は減少した後増加する(すなわち最小値が存在する)という現象がみられ,これまでの結果と比較して,定性的にも異なる傾向が新しく明らかになった.(3)プリューム径は混合効率に対して,あまり大きな影響を与えない.さらに,下面からの結晶化が起こる場合の,マッシュ形成を含めた液の分化を考察し,天然のマグマ溜りのモデルへと発展させるため,マッシュや液の平均的な運動量,組成,熱などの保存則に基づく物理モデルを構築した.現段階では,定性的な時間的進化を再現するとはいうものの,実験結果を定量的に説明するものにはなっていないため,今後の検討が必要である.


• マグマの発生・上昇プロセス

  1998

  Competitive research funding


• Processes of generationa and upwelling of magma

  1998

  Competitive research funding


• 阿蘇火山の進化過程

  1996

  Competitive research funding


• Evolution of Aso volcano

  1996

  Competitive research funding


• マグマ溜りの進化過程

  1992

  Competitive research funding


• evolntion of magma chambers

  1992

  Competitive research funding