研究者データベース

中川 光弘(ナカガワ ミツヒロ)
理学研究院 地球惑星科学部門 地球惑星システム科学分野
教授

基本情報

所属

  • 理学研究院 地球惑星科学部門 地球惑星システム科学分野

職名

  • 教授

学位

  • 理学博士(東北大学)

ホームページURL

J-Global ID

研究キーワード

  • 噴火   火山   火山ガス   噴火史   岩手火山   火山活動   火山噴火   マグマ   津波   地震活動   千島弧   島孤マグマ   ポリバリック結晶作用   島孤型ソレアイト   マグマ系   千嶋孤   三宅島火山   岩石学   大規模珪長質マグマ   北方四島   結晶分化   北海道駒ケ岳火山   樽前火山   リモートセンシング   ルアペフ火山   後カルデラ火山   有珠火山   千島列島   地殻変動   カルデラ火山   地球化学   火山岩岩石学   火山学   地球化学   火山岩岩石学   火山学   Geochemistry   Igneous Petrology   Volcanology   Geochemistry   Igneous Petrology   Volcanology   

研究分野

  • 自然科学一般 / 地球生命科学
  • 自然科学一般 / 固体地球科学
  • 自然科学一般 / 固体地球科学

職歴

  • 2010年 - 2012年 北海道大学 理学(系)研究科(研究院) 教授
  • 2004年 - 2006年 北海道大学教授(大学院理学研究科地球惑星科学専攻) 教授
  • 2004年 - 2006年 Professor
  • 2006年 - 北海道大学教授(大学院理学研究院自然史科学部門地球惑星システム科学分野) 教授
  • 2006年 - Professor
  • 1995年 - 2004年 北海道大学助手(大学院理学研究科地球惑星科学専攻) 助手
  • 1995年 - 2004年 Research Associate
  • 1989年 - 1995年 北海道大学助手(理学部地質学鉱物学科岩石学講座) 助手
  • 1989年 - 1995年 Research Associate
  • 1986年 - 1989年 三菱鉱業セメント株式会社(セラミックス研究所) 研究員

学歴

  •         - 1986年   東北大学   理学研究科   博士課程後期
  •         - 1986年   東北大学
  •         - 1982年   東北大学   理学研究科   博士課程前期
  •         - 1982年   東北大学
  •         - 1980年   東北大学   理学部   地学第二学科
  •         - 1980年   東北大学

所属学協会

  • American Geophysical Union(AGU)   日本火山学会   日本岩石鉱物鉱床学会   日本地質学会   IAVCEI (International Association of Volcanology and Chemistry of the Earth's Interior)   

研究活動情報

論文

  • Kuritani, T, Xia, Q.-K, Kimura, J, Liu, J, Shmizu, K, Ushikubo, T, Zhao, D, Nakagawa, M, Yoshimira, S
    Scientific Reports 9 6549  2019年 [査読有り][通常論文]
  • Kuritani, T, Kanai, C, Yamashita, S, Nakagawa, M
    Lithos 348-349 105197  2019年 [査読有り][通常論文]
  • Nakagawa, M, Matsumoto, A, Kobayashi, K, Wada, K
    Journal of Disaster Research 14 766 - 779 2019年 [査読有り][通常論文]
  • Nakamura, H, Iwamori, H. Nakagawa, M
    Gondwana Research 70 36 - 49 2019年 [査読有り][通常論文]
  • Yoshimura, S, Kuritani, T, Matsumoto, A, Nakagawa, M
    Scientific Reports 9 786  2019年 [査読有り][通常論文]
  • 中川 光弘, 宮坂 瑞穂, 三浦 大助, 上澤 真平
    地質学雑誌 124 7 473 - 489 2018年07月 [査読有り][通常論文]
  • 石毛 康介, 中川 光弘, 石塚 吉浩
    地質学雑誌 124 4 297 - 310 2018年05月 [査読有り][通常論文]
  • Matsumoto, A, Hasegawa, T, Nakagawa, M
    Journal of Petrology 59 4 771 - 793 2018年05月 [査読有り][通常論文]
  • Y. Yanagida, M. Nakamura, A. Yasuda, T. Kuritani, M. Nakagawa, T. Yoshida
    Geochemistry, Geophysics, Geosystems 19 3 838 - 864 2018年03月 [査読有り][通常論文]
     
    © 2018. American Geophysical Union. All Rights Reserved. The Ichinomegata maar, located in the back-arc side of the northeastern Japan arc, erupted calc-alkaline andesitic magma with abundant deep-crustal and mantle xenoliths at about 60–80 ka. We investigated the relationship between fractionated solids and differentiated silicic melts at middle to lower crust conditions through petrologic analyses of hornblende-bearing cumulate xenoliths and melt inclusions. The Sr and Nd isotope compositions are similar to those of the host magmas, suggesting their cognate origin. The crystallization sequence is determined to be olivine, spinel → clinopyroxene → hornblende, magnetite → plagioclase → apatite, based on the observation of texture and solid solution compositions. Of the five types of xenolith studied, the leuco-hornblende gabbro preserved interstitial glass and melt inclusions with a silica content (SiO2) of 63.9–74.0 wt % and high water content (up to 8.1 wt %). Hornblende geobarometry indicates an equilibrium pressure of 0.39–0.64 GPa, which corresponds to a depth of 15–24 km. The delay of plagioclase crystallization due to high water content characterizes differentiation of the hydrous arc magma. We successfully constructed an internally consistent differentiation model of the corundum-normative calc-alkaline trend to the silicic melt inclusions, starting from primitive basalt via successive fractionation of a calculated wherlite and cumulate xenoliths. In middle to late stage differentiation, hornblende gabbros are the dominantly fractionated assemblages. Our results are consistent with published differentiation experiments of hydrous arc magmas and the lithology of the deep crust beneath the back arc of the NE Japan arc as estimated from seismic tomography.
  • 長谷川健, 松本 亜希子, 東宮 昭彦, 中川 光弘
    地学雑誌 127 2 289 - 301 2018年 [査読有り][通常論文]
  • 中川光弘, 宮坂瑞穂, 富島千晴, 松本亜希子, 長谷龍一
    地学雑誌 127 2 247 - 271 2018年 [査読有り][通常論文]
  • 宮坂瑞穂, 中川光弘
    地学雑誌 127 2 229 - 246 2018年 [査読有り][通常論文]
  • Takeshi Kuritani, Tetsuya Sakuyama, Natsumi Kamada, Tetsuya Yokoyama, Mitsuhiro Nakagawa
    LITHOS 282 98 - 110 2017年06月 [査読有り][通常論文]
     
    The Pacific Plate subducting from the Japan Trench has accumulated in the mantle transition zone beneath NE Asia, and intraplate magmatism has been active above the stagnant Pacific slab. To understand the origin of the intraplate magmatism in relation to slab stagnation, a petrological and geochemical study was carried out on basaltic samples from a monogenetic volcano of the Fukue Volcano Group, southwest Japan. The eruption products consist of low-Si and high-Si groups, and the two magmas are hypothesized to originate from different mantle source material based on radiogenic isotopic compositions. The H2O contents of the primary magmas were estimated as similar to 2 wt.% for both the low-Si and high-Si groups. Analyses using multicomponent thermodynamics suggested that the low-Si and high-Si primary magmas were generated at similar to 2.5 GPa and 1345 degrees C and at similar to 1.8 GPa and 1285 degrees C, respectively. These results, and the geochemical characteristics of the products, indicated that the low-Si magma was generated in the asthenospheric mantle whereas the high-Si magma was produced by interaction of the low-Si magma with the sub-continental lithospheric mantle. The low mantle potential temperature of similar to 1300 degrees C and hydrous nature (H2O/Ce = similar to 650) of the low-Si magma suggested that the magma was generated by fluid-fluxed melting of the asthenospheric mantle. Based on these results and those obtained in previous studies, intraplate magmatism over the stagnant Pacific slab can be summarized as having been caused by either melting of the asthenospheric mantle through an influx of fluids derived from the mantle transition zone or decompression melting of a hydrous mantle plume derived from the mantle transition zone. We infer that the fluids for the flux melting have been released from the mantle transition zone where water was locally saturated. Meanwhile, hydrous mantle plumes have been generated at the mantle transition zone where a return flow of sub-lithospheric mantle material entrained beneath the subducting Pacific slab has intruded from below. (C) 2017 Elsevier B.V. All rights reserved.
  • Olga Bergal-Kuvikas, Mitsuhiro Nakagawa, Takeshi Kuritani, Yaroslav Muravyev, Nataliya Malik, Elena Klimenko, Mizuho Amma-Miyasaka, Akiko Matsumoto, Shunjiro Shimada
    CONTRIBUTIONS TO MINERALOGY AND PETROLOGY 172 5 172  2017年05月 [査読有り][通常論文]
     
    To understand the generation and evolution of mafic magmas from Klyuchevskoy volcano in the Kamchatka arc, which is one of the most active arc volcanoes on Earth, a petrological and geochemical study was carried out on time-series samples from the volcano. The eruptive products show significant variations in their whole-rock compositions (52.0-55.5 wt.% SiO2), and they have been divided into high-Mg basalts and high-Al andesites. In the high-Mg basalts, lower-K and higher-K primitive samples (>9 wt.% MgO) are present, and their petrological features indicate that they may represent primary or near-primary magmas. Slab-derived fluids that induced generation of the lower-K basaltic magmas were less enriched in melt component than those associated with the higher-K basaltic magmas, and the fluids are likely to have been released from the subducting slab at shallower levels for the lower-K basaltic magmas than for higher-K basaltic magmas. Analyses using multicomponent thermodynamics indicates that the lower-K primary magma was generated by similar to 13% melting of a source mantle with similar to 0.7 wt.% H2O at 1245-1260 degrees C and similar to 1.9 GPa. During most of the evolution of the volcano, the lower-K basaltic magmas were dominant; the higher-K primitive magma first appeared in AD 1932. In AD 1937-1938, both the lower-K and higher-K primitive magmas erupted, which implies that the two types of primary magmas were present simultaneously and independently beneath the volcano. The higher-K basaltic magmas evolved progressively into high-Al andesite magmas in a magma chamber in the middle crust from AD 1932 to similar to AD 1960. Since then, relatively primitive magma has been injected continuously into the magma chamber, which has resulted in the systematic increase of the MgO contents of erupted materials with ages from similar to AD 1960 to present.
  • 長谷川健, 中川光弘, 宮城磯冶
    地質学雑誌 123 5 269 - 281 2017年05月 [査読有り][通常論文]
  • 石毛康介, 中川光弘
    地質学雑誌 123 2 73 - 91 2017年 [査読有り][通常論文]
  • Oktory Prambada, Yoji Arakawa, Kei Ikehata, Ryuta Furukawa, Akira Takada, Haryo Edi Wibowo, Mitsuhiro Nakagawa, M. Nugraha Kartadinata
    BULLETIN OF VOLCANOLOGY 78 11 2016年11月 [査読有り][通常論文]
     
    Reconstruction of the eruptive history of Sundoro volcano is needed to forecast the probability of future eruptions and eruptive volumes. Sundoro volcano is located in Central Java (Indonesia), 65 km northwest of Yogyakarta, and in one of the most densely populated areas of Indonesia. On the basis of stratigraphy, radiocarbon dating, petrography, and whole-rock geochemistry, we recognize the following 12 eruptive groups: (1) Ngadirejo, (2) Bansari, (3) Arum, (4) Kembang, (5) Kekep, (6) Garung, (7) Kertek, (8) Watu, (9) Liyangan, (10) Kledung, (11) Summit, and (12) Sibajak. The Ngadirejo (34 ka BP) to Kledung (1 ka) eruptive groups are inferred to have been the stratovolcano building phase. Based on compositions of deposits, one or more magma reservoirs of intermediate chemical composition are inferred to have existed below the volcano during the periods of time represented by the eruptive groups. SiO2 of juvenile eruptive products ranges from 50 to 63 wt%, and K2O contents range from high K to medium K. The chemical composition and phenocryst content of eruptive products change with time. The lower SiO2 products contain mainly plagioclase, clinopyroxene, and olivine, whereas the more evolved rocks contain plagioclase, clinopyroxene, orthopyroxene, and rare hornblende and olivine. Our work has defined Sundoro's eruptive history for the period 1-34 ka, and this history helps us to forecast future activity. We estimated that the total amount of magma discharged since 34 ka is approximately 4.4 km(3). The average eruption rate over this group ranges from 0.14 to 0.17 km(3)/kyr. The eruption rate and the frequency of individual eruptions indicate that the volcano has been very active since 34 ka, and this activity in combination with our petrological data suggest the presence of one or more magma reservoirs that have been repeatedly filled and then discharged as eruptions have taken place. Our data further suggest that the volume of the crustal reservoir system has increased with time, such that explosive eruptions are more likely in the future and that they may be larger than the most recent small eruptions.
  • Takeshi Kuritani, Mitsuhiro Nakagawa
    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 17 10 4032 - 4050 2016年10月 [査読有り][通常論文]
     
    The Rishiri Volcano is located at the very rear of the Kuril Arc at its junction with the NE Japan Arc, and its 300 km depth to the slab surface is one of the deepest among the active arc volcanoes in the world. In this study, the origin of this ultra rear-arc magmatism was investigated by analyzing the basaltic lavas from the volcano. The lavas consist of low-K and high-K groups, with the low-K lavas predating the high-K lavas. Since it is unlikely that the high-K magmas are derivatives of the low-K magmas, the two magmas are thought to be derived from different source mantle materials. Analyses using multicomponent thermodynamics suggest that these magmas were both generated through the similar to 2% melting of a source mantle with 0.04-0.11 wt.% H2O at 1280-1340 degrees C and similar to 2.3 GPa. The temperatures at the surface of the subducting Pacific slab, from which the slab fluids were released, were estimated to be 860-960 degrees C for the low-K magmas and 930-1040 degrees C for the high-K magmas. These temperatures of the slab surface are remarkably higher than those predicted by thermal models. The estimated high temperatures of the slab surface and the latest detailed seismic tomography results suggest that the low-K and high-K magmatism resulted from the progressive production of fluids at the slab surface due to heating by the injection of hot mantle materials into a relatively large-scale fracture in the distorted portion of the subducting Pacific plate.
  • Shimpei Uesawa, Mitsuhiro Nakagawa, Akane Umetsu
    JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 325 1 27 - 44 2016年10月 [査読有り][通常論文]
     
    To understand the eruptive history, structure, and magmatic evolution of Yotei Volcano, southwest Hokkaido, Japan, we investigated the geology and petrology of tephras located around the base of the volcano. We identified 43 tephra units interbedded with soils (in descending stratigraphic order, tephras Y1-Y43), and four widespread regional tephras. Ten radiocarbon ages were obtained from soils beneath the Yotei tephras. On the basis of petrologic differences and, the stratigraphic positions of thick layers of volcanic ash soil, indicative of volcanic stratigraphic gaps, the Yotei tephras are divided into four groups (in ascending stratigraphic order): Yotei tephra groups I,II-1,II-2, and II-3. We calculated the age of each eruptive deposit based on the soil accumulation rate, and estimated the volume of each eruption using isopach maps or the correlation between eruption volume and the maximum thickness at similar to 10 km from the summit crater. The results regarding eruptive activity and the rate of explosive eruptions indicate four eruptive stages at Yotei Volcano over the list 50,000 years. Stage I eruptions produced Yotei tephra group I between ca. 54 cal. ka BP and up to at least ca. 46 cal. ka BP, at relatively high average eruption rates of 0.07 km(3) dense-rock equivalent (DRE)/ky. After a pause in activity of ca. 8000 years, Stage II-1 to II-2 eruptions produced Yotei tephra groups II-1 and II-2 from ca. 38 to ca. 21 cal. ka BP at high average eruption rates (0.10 km(3) DRE/ky), after a pause in activity of 2000-3000 years. Finally, after another pause in activity of 4000-5000 years, Stage II-3 eruptions produced Yotei tephra group II-3 from ca. 16.5 cal. ka BP until the present day, at low average eruption rates (0.009 km(3) DRE/ky). Whole-rock geochemical compositions vary within each tephra group over the entire eruption history. For example, group I and II-3 tephras contain the lowest and highest abundances, respectively, of K2O, P2O5, and Zr. Group II-1 has the highest abundances of Zr and Y. These trends indicate that the explosive activity was controlled by an evolving magma system. An understanding of these temporal changes in the chemical composition of the magma will enable future correlations of tephras with volcanic edifices, thereby revealing the full eruptive history and structure of Yotei Volcano, and constraining the timing of geological events in the region. (C) 2016 Elsevier B.V. All rights reserved.
  • Takeshi Hasegawa, Akiko Matsumoto, Mitsuhiro Nakagawa
    JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 321 15 58 - 72 2016年07月 [査読有り][通常論文]
     
    We investigated the eruptive sequence and temporal evolution of juvenile materials during the 120 ka Kutcharo pumice flow IV (Kp IV) eruption, which was the most voluminous (175 km(3): bulk volume) caldera-forming eruption of Kutcharo volcano. The eruptive deposits are divided into four units in ascending order. Unit 1 is widely dispersed and consists of silt-sized, cohesive ash. Unit 2 is a thin, moderately sorted pumice fall deposit with a restricted distribution and small volume (<0.2 km(3)). Unit 3, consisting of widely distributed ignimbrite, is the most voluminous. Unit 4 is also composed of pyroclastic flow deposits, but its distribution is limited to the northwest side of the caldera. Juvenile materials consist mainly of rhyolite pumice (74%-78% SiO2) associated with a minor amount of scoria (52%-73% SiO2) that are found only northwest of the caldera in Unit 3 and Unit 4. These scoriae can be classified on the basis of the P2O5 contents of their matrix glass into low-P, medium-P, and high-P types, which are almost entirely restricted to the lower part of Unit 3, Unit 4, and the upper part of Unit 3, respectively. These three types display distinct mixing trends with the rhyolitic compositions in SiO2-P2O5 variation diagrams. This evidence indicates that three distinct mafic magmas were independently and intermittently injected into the main body of silicic magma to erupt from the northwestern part of the magma system. Mafic injections did not occur in the southern part of the magma system. This petrologic evidence implies that the northwestern and southeastern flows of Unit 3 are heterotopic, contemporaneous products derived from multiple vent systems. Although Unit 2 was derived from an eruptive column, its volume is very small compared to Plinian fall deposits of typical caldera-forming eruptions. In our interpretation, the activity of the Kp IV eruption reached its climax rapidly, depositing Unit 3, without first producing a stable Plinian column. The presence of multiple vent systems could have allowed the system to bypass an initial eruptive stage with a stable Plinian column and begin its climactic stage, represented by Unit 3, rapidly. Multiple vents could have been the result of sequential injections of mafic magma in the early stages of the Kp IV eruption. (C) 2016 Elsevier B.V. All rights reserved.
  • Kuritani, T, Tanaka, M, Yokoyama, T, Nakagawa, M, Matsumoto, A
    Journal of Petrology 57 6 1223 - 1240 2016年06月 [査読有り][通常論文]
     
    The generation and evolution of basaltic magmas at Usu volcano, located at the junction between the NE Japan arc and the Kuril arc, have been investigated. The mafic products, which form the somma edifice of the volcano, consist of basalt (49 center dot 6-51 center dot 3 wt % SiO2) and basaltic andesite (52 center dot 0-54 center dot 9 wt % SiO2) lavas. The basaltic lavas show relatively tight compositional trends, and Sr-87/Sr-86 ratios tend to decrease with increasing whole-rock SiO2 content. The water content of the basaltic magmas was determined to be similar to 4 center dot 8 wt % based on plagioclase-melt thermodynamic equilibrium. Using this information and an olivine maximum fractionation model, the water content of the primary Usu magma was estimated to be 3 center dot 9 wt %. Multi-component thermodynamic calculations suggest that the primary magma was generated by similar to 23% melting of the source mantle with similar to 0 center dot 94 wt % H2O at similar to 1300A degrees C and similar to 1 center dot 4 GPa. The 0 center dot 94 wt % water content of the source mantle is significantly higher than that beneath volcanoes in the main NE Japan arc (generally < 0 center dot 7 wt % H2O); this implies that the wedge mantle at the arc-arc junction is intensively hydrated. The temperature of the wedge mantle of similar to 1300A degrees C at similar to 1 center dot 4 GPa is also significantly higher than that of the mantle in the main NE Japan arc. Unlike the basaltic lavas, the whole-rock compositions of the basaltic andesite lavas are scattered in Harker variation diagrams. This observation suggests that the compositional diversity was produced by at least two independent processes. To elucidate the processes responsible for this compositional diversity, principal component analysis was applied to the major element compositions of the samples. This suggests that 47% of the diversity of the whole-rock compositions can be explained by mixing with partial melts of lower crustal materials, 25% is explained by redistribution of plagioclase phenocrysts, and 16% is explained by fractionation of accessory minerals.
  • Takeshi Hasegawa, Mitsuhiro Nakagawa
    QUATERNARY INTERNATIONAL 397 18 39 - 51 2016年03月 [査読有り][通常論文]
     
    Akan volcano, in eastern Hokkaido in the southern Kurile arc, occupies a rectangular caldera (24 x 13 km) with a long (1.7-0.2 Ma) and complex history. This paper combines tephrostratigraphy, tephrochronology, and petrological and geochemical evidence to elucidate the eruptive history and evolution of the caldera. Pyroclastic deposits from Akan caldera are divided into at least 40 "eruptive units", separated by paleosols, that constitute 17 "eruptive groups" (Ak1 to Ak17, in descending stratigraphic order) that are petrologically distinct and separated by indicators of longer dormancy periods such as thick (> 30 cm) paleosols and angular unconformities. The estimated volumes of most eruptive groups are less than 10 km(3) dense rock equivalent, and four groups (Ak2, Ak4, Ak7, and Ak13) are larger. Group Ak2, exceeding 50 km3, is the largest. Pyroclastic deposits from Akan caldera are intercalated with pyroclastic deposits from the adjacent Kutcharo caldera and distal air-fall ash layers from central Hokkaido, suggesting that caldera-forming episodes overlapped in central and eastern Hokkaido. Radiometric ages from these exotic deposits range from 1.46 to 0.21 Ma, indicating that caldera-forming eruptions occurred at Akan volcano for more than 1 million years at an average magma discharge rate of approximately 10(-1) km(3)/kyr. Juvenile materials in Akan caldera pyroclastics consist of dominantly aphyric, two-pyroxene dacite to rhyolite. They are characterized by a wide range of K2O compositions (0.8-2.8 wt.%) within a narrow range of SiO2 compositions (67-73 wt.%). Plots of SiO2 vs. K2O suggest that each eruptive group is the product of a distinct, ephemeral magma system rather than a single long-lived magma system. These magma systems appear to have been generated and erupted successively beneath the caldera for more than 1 million years. Each magma system thus appears to represent a relatively short period of activity, and they were separated by relatively long dormancy periods before the next magma system. In particular, a long dormancy of 400 kyr preceded eruptive group Ak2, which consists of the most voluminous and compositionally varied silicic magmas. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.
  • Nadezhda G. Razzhigaeva, Akiko Matsumoto, Mitsuhiro Nakagawa
    QUATERNARY INTERNATIONAL 397 63 - 78 2016年03月 [査読有り][通常論文]
     
    We identified 32 distinct layers of Holocene tephra in the southern Kurile Islands on the basis of petrological features and C-14 ages of soils beneath or above the tephra layers. Three layers were derived from the volcanoes of Kunashir Island: one from Mendeleev volcano (ca. 2.6 cal ka) and two from Tyatya volcano (1420 cal. BP and AD 1973). Fourteen widely distributed silicic tephra layers were derived from four volcanoes in Hokkaido: Mashu, Rausudake, Tarumai, and Hokkaido-Komagatake. A widespread tephra was derived from Baitoushan volcano, between China and North Korea. Fourteen tephra layers have unknown source volcanoes: 1 silicic medium-K ash, 2 silicic low-K ash, and 11 scoria/pumice ash layers. Except for the medium-K ash, these tephra are presumed to be derived from the volcanoes in the Kurile Islands. It has been known that caldera-forming eruptions occurred at Mashu (Hokkaido) and Lvinaya Past (Iturup) volcanoes in the early Holocene (ca. 12-8 ka). However, we did not find any tephra from Lvinaya Past volcano. Our results provide evidence of the temporal and spatial evolution of eruptive activity in the southern Kurile arc. We conclude that the level of the eruptive activity in the southern Kurile Islands (especially Kunashir Island) has been lower than that in eastern Hokkaido since 8 ka. The islands produced mainly vulcanian and strombolian eruptions of mafic magma, whereas eastern Hokkaido produced plinian eruptions of silicic magma repeated at intervals of 1000-2000 years. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.
  • 増渕 佳子, 石崎 泰男, 白井 智仁, 松本 亜希子, 宮坂 瑞穂, 中川 光弘
    地質学雑誌 122 10 533 - 550 一般社団法人 日本地質学会 2016年 [査読有り][通常論文]
     

    沼沢火山の先カルデラ期とカルデラ形成期の噴出物の岩石記載,斑晶鉱物組成,全岩主・微量成分組成および同位体組成から,沼沢火山では,噴火期ごとに流紋岩~デイサイト質マグマで満たされた珪長質マグマ溜りが再生されたことが明らかとなった.マグマ蓄積率を求めると,カルデラ形成噴火では他の噴火期に比べ2~40倍の早さでマグマが蓄積されたと考えられる.また,4.3万年前の惣山噴火以降,珪長質マグマとともに安山岩質マグマが噴出している.先カルデラ期で噴出した安山岩質マグマは,噴火の主体となった珪長質マグマと同じ同位体組成をもち,起源物質は同じであると考えられる.一方で,カルデラ形成噴火で噴出した3種類のマグマは異なる同位体組成をもつことから,地下の多様な場でマグマが発生し,それが地殻中の浅所マグマ溜りに集積したことが示唆され,このことが大規模なカルデラ形成噴火を発生させた原因の一つになった可能性が高い.

  • 松本 亜希子, 中川 光弘, 井口 正人
    火山 61 3 545 - 558 特定非営利活動法人 日本火山学会 2016年 [査読有り][通常論文]
     

    On the 24th July, 2012, a large scale explosion occurred at Minamidake Summit crater of Sakurajima volcano, for the first time in last 1.5 years. This eruption is characterized by a clear, large preceding inflation ca.22 hours before the eruption. The juvenile glass particles in the volcanic ash of this eruption have less amount of microlite than those of Showa crater. The crystal size of microlite is also smaller. In contrast, their microlite number densities (MND) of plagioclase and pyroxenes are similar to those of Showa crater. According to the results of the decompression experiments by previous studies, the variations of crystallinity of microlite with the constant MND can be explained by the difference in the length of the duration for decompression, and/or the duration until the quench after the decompression. Considering these results, the juveniles of the summit eruption are derived from the eruption induced by relatively rapid decompression with rapid quench, and the juveniles from Showa crater are the products of the eruptions accompanied with the relatively slower decompression and/or the longer annealing after decompression. Therefore, it is interpreted that the 24th July, 2012 eruption was caused by rapid magma ascent with much shorter stagnation in the conduit. In contrast, the eruptions at Showa crater might have been induced by slower magma ascent and/or longer stagnation at a shallower depth of the conduit. This interpretation agrees with the data of geophysical observations. On matrix glass chemistry, juveniles of this summit eruption show the distinct trend from those of Showa crater. This feature can be produced by the difference in mode of microlite, which are crystallized during magma ascent. Accordingly, it is possible to evaluate the difference in magma ascent process, using the matrix glass chemistry.

  • Ryo Takahashi, Mitsuhiro Nakagawa
    JOURNAL OF PETROLOGY 56 6 1089 - 1112 2015年06月 [査読有り][通常論文]
     
    After about 5000 years of dormancy, the Hokkaido-Komagatake volcano started its historical eruptive stage with a plinian eruption in ad 1640. During this eruption, a zoned magma chamber was formed with upper mafic and lower silicic layers. This study focuses on the temporal evolution and eruption processes of the magma chamber based on petrological investigations of subsequent eruptions in ad 1694, 1856, 1929 and 1942. In all the eruptive products the majority of the clasts are strongly porphyritic white pumice (silicic andesite), which was derived from the silicic end-member magma. These are associated with small amounts of mafic ejecta (mafic to intermediate andesite). Based on density calculations for the magmas, the layered structure of the zoned magma chamber is likely to have been stable throughout the historical eruptive stage. In each eruption since ad 1694, relatively mafic magma erupted initially followed by more silicic magma. In addition, although there is petrological evidence for a mafic magma injection into a resident silicic magma chamber prior to the ad 1640 eruption, all eruptions from ad 1694 onwards appear to have taken place without new mafic injections. This suggests that since the ad 1694 eruption magmas have been erupted sequentially from the upper mafic part of the magma chamber. The composition of scoria, the most mafic ejecta, changed from relatively mafic magma in the ad 1694 eruption to gray pumice in later eruptions, which represent a hybrid magma. This temporal change is interpreted to indicate that mafic magma mixed gradually with more silicic magmas during repeated eruptions. In addition, the volume of the mafic and hybrid magmas decreased because of repeated eruptions without new mafic magma injections, so that the ad 1942 eruption was dominated by the eruption of silicic magma. We consider the present chamber to be filled with highly porphyritic, viscous silicic magma.
  • 松本 亜希子, 宮坂 瑞穂, 中川 光弘
    北海道大学地球物理学研究報告 78 78 1 - 9 北海道大学大学院理学研究院 2015年03月 [査読無し][通常論文]
  • Naomi Harada, Kota Katsuki, Mitsuhiro Nakagawa, Akiko Matsumoto, Osamu Seki, Jason A. Addison, Bruce P. Finney, Miyako Sato
    PROGRESS IN OCEANOGRAPHY 126 242 - 253 2014年08月 [査読有り][通常論文]
     
    Accurate prediction of future climate requires an understanding of the mechanisms of the Holocene climate; however, the driving forces, mechanisms, and processes of climate change in the Holocene associated with different time scales remain unclear. We investigated the drivers of Holocene sea surface temperature (SST) and sea ice extent in the North Pacific Ocean, and the Okhotsk and Bering Seas, as inferred from sediment core records, by using the alkenone unsaturation index as a biomarker of SST and abundances of sea ice-related diatoms (F. cylindrus and F. oceanica) as an indicator of sea ice extent to explore controlling mechanisms in the high-latitude Pacific. Temporal changes in alkenone content suggest that alkenone production was relatively high during the middle Holocene in the Okhotsk Sea and the western North Pacific, but highest in the late Holocene in the eastern Bering Sea and the eastern North Pacific. The Holocene variations of alkenone-SSTs at sites near Kamchatka in the Northwest Pacific, as well as in the western and eastern regions of the Bering Sea, and in the eastern North Pacific track the changes of Holocene summer insolation at 50 degrees N, but at other sites in the western North Pacific, in the southern Okhotsk Sea, and the eastern Bering Sea they do not. In addition to insolation, other atmosphere and ocean climate drivers, such as sea ice distribution and changes in the position and activity of the Aleutian Low, may have systematically influenced the timing and magnitude of warming and cooling during the Holocene within the subarctic North Pacific. Periods of high sea ice extent in both the Okhotsk and Bering Seas may correspond to some periods of frequent or strong winter-spring dust storms in the Mongolian Gobi Desert, particularly one centered at similar to 4-3 thousand years before present (kyr BP). Variation in storm activity in the Mongolian Gobi Desert region may reflect changes in the strength and positions of the Aleutian Low and Siberian High. We suggest that periods of eastward displacement or increased intensity of the Aleutian Low correspond with times of increased extent of sea ice in the western Okhotsk Sea and eastern Bering Sea. (C) 2014 Elsevier Ltd. All rights reserved.
  • 中川 光弘, 長谷川 健, 松本 亜希子
    科学 84 1 97 - 102 岩波書店 2014年01月 [査読有り][通常論文]
  • Ryo Takahashi, Mitsuhiro Nakagawa
    JOURNAL OF PETROLOGY 54 4 815 - 838 2013年04月 [査読有り][通常論文]
     
    Historical eruptive activity commenced at Hokkaido-Komagatake volcano in ad 1640 after about 5000 years of dormancy. The ad 1640 event was followed by another eruption in ad 1694. Petrological investigation of these eruptions provides useful information for understanding the initial state of the magma system and its early evolution. Both events were plinian eruptions in which the ejecta were primarily white pumice (silicic andesite) with lesser amounts of mafic clasts (mafic to intermediate andesite). In both cases the mafic material erupted prior to the silicic. The ad 1640 ejecta are of three types: white pumice, scoria and banded pumice. The whole-rock chemistry of the banded pumice shows a linear chemical trend connecting the white pumice and scoria, which is interpreted to indicate that magma mingling occurred between two end-members. Highly porphyritic white pumice shows no evidence of magma mixing, indicating that this material is directly representative of the silicic end-member magma. Scoria, which is interpreted to represent the mafic end-member magma, is nearly aphyric but the phenocrysts that are present are similar to those contained in the white pumice. In the ad 1640 eruption, the injected mafic magma is inferred to have ascended as a dike into a silicic chamber while mingling; the mafic material was erupted first. In the ad 1694 eruption, gray pumice occurs in addition to the other three types of ejecta and this has whole-rock compositions intermediate between those of the white pumice and scoria. In addition, the gray pumice contains phenocrysts with reverse zonation, suggesting that it is a product of mixing between the end-member magmas. These pumices suggest that a zoned magma body was formed during the ad 1640 eruption and that the two contrasting magmas mixed until the ad 1694 eruption. The chamber was compositionally reverse zoned and consisted of upper mafic and lower silicic zones with hybrid layers between them; the silicic magma was strongly porphyritic and thus denser than the aphyric mafic magma. The sequence of the ad 1694 eruption can be explained by sequential ejection from the upper part of the zoned chamber without a new injection of mafic magma. This is consistent with the view that the ad 1694 banded pumice was the product of mingling between the silicic and hybrid magmas and that mafic magma had not interacted with the silicic magma.
  • 小杉安由美, 中川光弘, 清野寛子
    地質学雑誌 119 743 - 758 2013年 [査読有り][通常論文]
  • Matsumoto, A, Nakagawa, M, Miyasaka, M, Iguchi, M
    Bull. Volcanol. Soc. Japan 58 191 - 212 2013年 [査読有り][通常論文]
  • Calderas and acrive volcanoes in central to eastern Hooaido
    Hasegwa, T, Nakagawa, M, Kishimoto, H
    Bull. Volcanol. Soc. Japan, CD BOOK 58 A1 1 - 34 2013年 [査読有り][通常論文]
  • Takeshi Hasegawa, Mitsuhiro Nakagawa, Hiroshi Kishimoto
    JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES 107 1 39 - 43 2012年02月 [査読有り][通常論文]
     
    The eruptive history and magma systems of large-scale explosive eruptions (VEI>5) in eastern Hokkaido, Japan, are reviewed on the basis of recently reported high-resolution tephrostratigraphy. More than 70 large-scale explosive eruptions have been recorded from the Akan, Kutcharo, Atosanupuri, and Mashu caldera volcanoes in the past 1.7 Ma. The total tephra volume of these eruptions is estimated to be approximately 1000 km(3). The discharge rate increases remarkably from 0.2 km(3)/kyr to 2.0 km(3)/kyr at approximately 0.2 Ma. The discharge rate is still high owing to the recent frequent activity of the Mashu caldera. The silicic magma systems of the Akan, Kutcharo, and Mashu calderas formed independently. On the other hand, the magma olAtosanupuri is associated with that of Kutcharo caldera.
  • 長谷川健, 中川光弘, 伊藤順一, 山元孝広
    地質学雑誌 117 12 686 - 699 2011年12月15日 [査読無し][通常論文]
  • 長谷川 健, 中川 光弘, 岸本 博志
    月刊地球 33 12 726 - 734 海洋出版 2011年12月 [査読無し][通常論文]
  • 長谷川健, 中川光弘, 岸本博志
    月刊地球 33 12 726 - 734 2011年12月01日 [査読無し][通常論文]
  • Takeshi Hasegawa, Mitsuhiro Nakagawa, Mitsuhiro Yoshimoto, Yoshihiro Ishizuka, Wataru Hirose, Sho-ichi Seki, Vera Ponomareva, Rybin Alexander
    QUATERNARY INTERNATIONAL 246 1-2 278 - 297 2011年12月 [査読有り][通常論文]
     
    A tephrostratigraphic and petrological study of the Chikurachki (1816 m)-Tatarinov-Lomonosov volcanic chain (CTL volcanic chain) and Fuss (1772 m), located at the southern part of Paramushir Island in the northern Kurile Islands, was carried out to reveal the explosive eruption history during the Holocene and the temporal change of the magma systems of these active volcanoes. Tephra successions were described at 54 sites, and more than 20 major eruptive units were identified, consisting of pumice fall, scoria fall and ash fall deposits, each of which are separated by paleosol or peat layers. The source volcano of each recognized tephra layer was confirmed by correlation with proximal deposits of each eruption center with respect to petrography and whole-rock and glass chemistry. The age of each layer was determined by radiocarbon dating and the stratigraphic relationship with the dated, widespread tephra from Kamchatka according to the thickness of paleosols bracketed between tephra layers. The Holocene activity in this region was initiated by eruptions from the Tatarinov and Lomonosov volcanoes. After the eruptions, the Fuss and Chikurachki volcanoes started their explosive activities at ca. 7.5 ka BP, soon after the deposition of widespread tephra from the Kurile Lake caldera in southern Kamchatka. Compared with Fuss located on the back-arc side, Chikurachki has frequent, repeated explosive and voluminous eruptions. Whole-rock compositions of the rocks of the CTL volcanic chain and Fuss are classified into medium-K and high-K groups, respectively. These suggest that magma systems beneath the CTL volcanic chain and Fuss differ from each other and have been independently constructed. The rocks of the Chikurachki volcano are basalt-basaltic andesite and have gradually evolved their chemical compositions; when graphed on a SiO(2)-oxide diagram, these form smooth trends from mafic to more felsic. This suggests that the magma system evolved mainly by fractional crystallization. In contrast, matrix glass chemistries for Fuss pumices are distinct for each eruption and show different K(2)O levels on a SiO(2)-K(2)O diagram. This implies that the magma system of Fuss has been frequently replaced. Both volcanoes have been active under the same subduction system. However, the Chikurachki volcano will continue eruptive activity under a stable magma system with a higher magma discharge rate, whereas Fuss may continue construction with an intermittent supply of distinct, small magma batches. (C) 2011 Elsevier Ltd and INQUA. All rights reserved.
  • Mitsuhiro Nakagawa, Naoto Hiraga, Ryuta Furukawa
    JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH 205 1-2 1 - 16 2011年08月 [査読有り][通常論文]
     
    Tarumai Volcano started a series of historic eruptive activity in AD 1667 after a dormancy of approximately 2000 years. The historic juvenile ejecta are mainly silicic andesite pumice associated with scoria, banded pumice and dome lava (SiO2 = 55-63%), and are mixing products of two or three end-member magmas. In the initial largest plinian eruptions (AD 1667 period), simple mixing between two end-member magmas, silicic andesite (SA) and basalt, occurred. Large plinian eruptions (AD 1739 period) and the latest intermittent eruptions (AD 1804-AD 1909: latest period) also produced mixed magmas including both the SA, intermediate-SiO2 andesite (IA), and basalt. Magmatic temperatures of the SA and IA magmas are 900-950 degrees C and approximately 1000 degrees C. respectively. The rocks of each period form linear trends in oxide-oxide diagrams, suggesting that mixing of two end-member magmas occurred in each period. Thus, it can be estimated that the IA magma was formed by mixing between the basaltic and SA magmas. These relations suggest that the injection of the basaltic magma into the SA magma occurred before the AD 1667 period, resulting in the formation of a zoned magma chamber. These two magmas were then withdrawn to mingle, during the AD 1667 period. After the period, the zoned chamber was composed of an upper SA magma and a lower mixed IA magma. Chemical compositions of the basaltic magma have been slightly different in each period since AD 1667. In addition, the phenocrystic minerals of the IA magma also have changed as a consequence of re-equilibration with the more mafic IA bulk magma compositions present from AD 1739 to AD 1909. Thus, distinct basaltic magma has repeatedly injected into the zoned chamber before each eruption. Although the scale of eruptions became much smaller after the plinian eruptions of AD 1739, the ratio of IA magma in the latest eruptive materials is much larger than that in AD 1739, suggesting that a larger amount of the lower part (IA magma) of the zoned magma chamber was effectively withdrawn in the latest period. However, withdrawal depth should be much shallower in the latest activity compared with the activities in AD 1667 and AD 1739 because the tapping depth from a chamber strongly depends on eruption rate. Thus, it is hypothesized that most of the SA magma in the upper part of the zoned magma chamber was consumed in the AD 1667 and AD 1739 periods. The temporal change of the magma system suggests that a large plinian eruption similar to what occurred in AD 1667 or AD 1739 is unlikely in the near future because most of the major magma (SA magma) has already erupted. Because it took considerable time (ca. 2000 yr) to accumulate a large volume of SA magma previously, we forecast that the volcano will enter a prolonged dormant period to accumulate voluminous SA magma for a next eruptive stage, or it will erupt only IA magma similar to the small eruptions that occurred during AD 1804-1909. (C) 2011 Elsevier B.V. All rights reserved.
  • 上澤 真平, 中川 光弘, 江草 匡倫
    火山 56 2 51 - 63 特定非営利活動法人日本火山学会 2011年06月30日 [査読無し][通常論文]
     
    We carried out the geological and petrological investigations around the summit area of Yotei Volcano. Four eruptive crater groups are recognized: Summit, Hinangoya, Niseko and Kitayama in ascending order. They erupted six pyroclastic deposits (from S-6 to S-1 in ascending order) and five lava flows. Lava effusion occurred from the Hinangoya, Niseko and Kitayama crater groups. These activities were mainly Strombolian. Whole-rock chemistry of juvenile materials is distinct among four crater groups, indicating distinct magma system has been active beneath different craters. The radiocarbon ag...
  • 山元 孝広, 伊藤 順一, 中川 光弘
    地質調査研究報告 61 5-6 161 - 170 産業技術総合研究所地質調査総合センター 2010年 [査読無し][通常論文]
  • 藤原 伸也, 石塚 吉浩, 山崎 俊嗣, 中川 光弘
    火山 54 6 253 - 262 特定非営利活動法人日本火山学会 2009年12月31日 [査読無し][通常論文]
     
    Tokachi-dake volcano restarted eruptive activity at the Ground crater in middle Holocene after long dormancy of nearly 10ky. The activity at the crater (Stage 1) was the most explosive and voluminous one in the volcano during Holocene. We newly found a pyroclastic flow deposit beneath already recognized pyroclastic flow deposit (Gfl-1: Ground Crater pyroclastic flow deposit 1) of the Stage-I, intercalated with lahar deposits and thin soils. The deposit is composed of gravel-sized blackish blocks, pumices, banded pumices and altered blocks with yellowish to reddish brown colored fine sand ma...
  • 中川 光弘
    砂防と治水 42 5 94 - 96,図巻頭1p 全国治水砂防協会 2009年12月 [査読無し][通常論文]
  • 玉田 純一, 中川 光弘
    火山 54 4 147 - 162 特定非営利活動法人日本火山学会 2009年08月31日 [査読無し][通常論文]
     
    Oakan volcano is one of the post-caldera volcanoes of Akan caldera, and its eruptive history has not yet been clarified well. In order to reveal the structure of volcanic edifice and eruptive history with possible age data, we carry out not only geological survey but also tephrochronological study around the volcano. We identify 10 tephra units, nine of which are wide-spread tephras from other volcanoes in Hokkaido and Baitoushan volcano. Only one tehpra unit (Oafa) from Oakan volcano has been recognized, but the other nine tephras can be used as good time markers for understanding the acti...
  • 長谷川健, 岸本博志, 中川光弘, 伊藤順一, 山元孝広
    地質学雑誌 115 8 369 - 390 2009年08月15日 [査読無し][通常論文]
  • 石丸聡, 田村慎, 廣瀬亘, 村山泰司, 岡崎紀俊, 柴田智郎, 中川光弘, 吉本充宏, 長谷川健, 上澤真平, 西本潤平, 小杉安由美, 松本亜希子, 馬場彰, 佐々木寿, 高橋浩晃, 一柳昌義, 山口照寛, 河野裕希, 本多亮, 笠原稔
    北海道立地質研究所報告 80 115 - 126 2009年03月31日 [査読無し][通常論文]

書籍

  • 北海道の地震と津波
    中川光弘 (担当:分担執筆)
    北海道新聞社 2012年
  • 火山の事典(第2版)
    中川 光弘 (担当:分担執筆範囲:マグマ供給系:182-189p)
    朝倉書店 2008年06月
  • 北海道の活火山
    勝井義雄, 岡田弘, 中川光弘 (担当:共編者(共編著者))
    北海道新聞社 2007年
  • ルアペフ
    中川光弘 (担当:分担執筆)
    山海堂 2004年

その他活動・業績

共同研究・競争的資金等の研究課題

  • 島弧型玄武岩質マグマ噴火のマグマ系と噴火機構解明のための日ロ共同研究
    科研費・基盤研究A
    研究期間 : 2010年04月 -2014年03月 
    代表者 : 中川 光弘
  • 北海道中東地域の火山活動解析
    産総研:受託研究
    研究期間 : 2010年04月 -2012年03月 
    代表者 : 中川 光弘
  • 北海道東部のカルデラ火山に関する研究
    産総研:受託研究
    研究期間 : 2008年04月 -2010年03月 
    代表者 : 中川 光弘
  • 白頭山火山の活動史とマグマについての日朝中3ヶ国共同研究
    科研費・基盤研究A
    研究期間 : 2005年04月 -2009年03月 
    代表者 : 谷口宏充
  • 千島弧の火山活動・地震活動・地殻変動に関する日露米3ケ国共同研究
    科研費・基盤研究A
    研究期間 : 2005年04月 -2009年03月 
    代表者 : 中川 光弘
  • 極東地域の島弧の地質環境における熱水活動とそれに伴う金属鉱床の形成過程
    科研費・基盤B
    研究期間 : 2004年04月 -2007年03月 
    代表者 : 中川 光弘
  • 火山噴火の長期予測と災害軽減のための基礎科学
    科研費・特定領域研究
    研究期間 : 2002年04月 -2007年03月 
    代表者 : 岡田弘
  • オホーツクおよびアムールプレート境界域の地震テクトニクスの調査研究
    科研費・基盤研究A
    研究期間 : 2002年04月 -2005年03月 
    代表者 : 笠原稔
  • 精密時間軸に基づいた活火山のマグマプロセスの解明とマグマ供給系の復元
    科研費・基盤研究C
    研究期間 : 1999年04月 -2002年03月 
    代表者 : 中川 光弘
  • 大規模カルデラ火山のマグマ系進化の岩石学的・地球化学的解明
    科研費・一般研究C
    研究期間 : 1993年04月 -1995年03月 
    代表者 : 中川 光弘
  • 島弧玄武岩質マグマの深部結晶作用に関する研究
    科研費・重点領域研究
    研究期間 : 1993年04月 -1994年03月 
    代表者 : 中川 光弘

教育活動情報

主要な担当授業

  • マグマ科学概論
    開講年度 : 2019年
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : マグマ,火山,火山噴火,地球テクトニクス,火山災害
  • マグマ科学特論
    開講年度 : 2019年
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : マグマ,火山,火山噴火,地球テクトニクス,火山災害
  • 自然史科学特別講義Ⅰ
    開講年度 : 2019年
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : 火山学,地球物理学,地質学,岩石学,地球化学
  • 自然史科学特別講義Ⅱ
    開講年度 : 2019年
    課程区分 : 修士課程
    開講学部 : 理学院
    キーワード : 火山学,地球物理学,地質学,岩石学,地球化学
  • 地質学実習
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 野外地質調査,ルートマップ,地形図
  • 火山学
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : マグマ,火山,火山噴火,火山地質,火成岩岩石学,テクトニクス,噴火予測,火山災害
  • 地球惑星科学実験Ⅳ
    開講年度 : 2019年
    課程区分 : 学士課程
    開講学部 : 理学部
    キーワード : 岩石学, 火山学, 地球化学, 火山岩, マグマ,全球衛星測位システム, GEONET, 合成開口レーダー, 合成開口レーダー干渉法, データ処理

大学運営

学内役職歴

  • 2015年4月1日 - 2017年3月31日 総合博物館長
  • 2017年4月1日 - 2019年3月31日 総合博物館長

委員歴

  • 2009年04月 - 現在   気象庁   火山活動評価検討委員会委員
  • 2004年04月 - 現在   北海道開発局   道路防災ドクター
  • 2004年04月 - 現在   北海道   北海道防災会議火山専門委員
  • 2004年04月 - 現在   気象庁   火山噴火予知連絡会委員
  • 2002年04月 - 現在   (財)北海道道路管理技術センター   道路管理技術委員会委員
  • 2004年 - 2008年   日本火山学会   理事   日本火山学会
  • 2002年 - 2006年   日本地質学会   火山部会部会長   日本地質学会
  • 1998年 - 2004年   日本岩石鉱物鉱床学会   評議員   日本岩石鉱物鉱床学会
  • 日本火山学会   編集委員(1995年7月まで)   日本火山学会


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