Search Results 1-20 of 102

  • Scientific research on formation processes of ocean resources: GSJ's research results of the Cross-ministerial Strategic Innovation Promotion Program (SIP), "Next-generation technology for ocean resources exploration".  [in Japanese]

    Yamasaki Toru , Komori Shogo , Inoue Takahiko , Ishizuka Osamu , Ikehara Ken

    <p>戦略的イノベーション創造プログラム(SIP)「次世代海洋資源調査技術」における,地質調査総合センター(GSJ)の5 ヵ年の研究成果をまとめた.「次世代海洋資源調査技術」においてGSJは,4つの研究テーマの一つである,「海洋資源の成因の科学的研究に基づく調査海域の絞り込み手法の開発」に国立研究開発法人海洋研究開発機構や国立大学法人九州大学等とともに連携して取り組んできた.GSJでは …

    BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN 69(6), 265-303, 2018

    J-STAGE

  • Seismic imaging of mantle wedge corner flow and arc magmatism

    HASEGAWA Akira

    … Slab-derived H<sub>2</sub>O is fixed to the layer as hydrous minerals, which are brought down by the slab and eventually decompose. … The combination of H<sub>2</sub>O addition and adiabatic decompression causes partial melting within the ascending flow. …

    Proceedings of the Japan Academy, Series B 94(5), 217-234, 2018

    J-STAGE

  • Study notes on water and magmas in the depths of the Earth  [in Japanese]

    KAWAMOTO Tatsuhiko

    … I started high-pressure and high-temperature (HPHT) experiments as a postdoc at Ikuo Kushiro's lab at Tokyo, where I conducted partial melting experiments of hydrous mantle peridotite with Kei Hirose and duplicated andesite-dacite-rhyolite magmas by crystal fractionation of hydrous arc basalts. … I proposed a choke point of subducting hydrous minerals, hydrous mantle transition and generation of komatiite and kimberlite magmas. …

    Japanese Magazine of Mineralogical and Petrological Sciences 47(1), 13-26, 2018

    J-STAGE

  • Composition of diamond-forming media in cuboid diamonds from the V. Grib kimberlite pipe (Arkhangelsk province, Russia)

    Zedgenizov Dmitry A. , Malkovets Vladimir G. , Griffin William L.

    … Grib kimberlite pipe (Arkhangelsk province, NW Russia) reveal two contrasting types: carbonatitic and hydrous-silicic. … Grib kimberlite pipe show enrichment in many incompatible elements, which supports their formation by partial melting of metasomatized mantle peridotites and eclogites. …

    GEOCHEMICAL JOURNAL 51(3), 205-213, 2017

    J-STAGE

  • Major element composition of the crust formed at the Hadean subduction zone: constraints from high-pressure hydrous melting experiments of komatiite  [in Japanese]

    Kondo Nozomi , Kogiso Tetsu

    <p>冥王代(>4.0 Ga)にマントルと地殻がどのように分化していたか、そして地殻がどのような組成であったかを知ることは、地殻の抽出とリサイクルによるマントル化学組成進化の初めの様相を理解する上で必要不可欠である。我々は、先行研究の高マントルポテンシャル温度におけるマントル対流モデル(Foley et al. 2014)を参考に冥王代の火成活動様式を推定し、冥王代に形成される地 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 64(0), 243, 2017

    J-STAGE

  • Composition of the Hadean mafic crust and its hydrous melting experiments: A test for the Hadean silicic crust  [in Japanese]

    Kondo Nozomi , Kogiso Tetsu

    <p>地球が誕生した46億年前から40億年前の冥王代の地殻組成は、マントル化学進化の初期過程を制約する上で重要である。本研究では、冥王代に存在したと考えられる苦鉄質地殻の組成を推定するとともに、冥王代の珪長質地殻の存在を検証する。まず、プレートテクトニクス以前には、断熱上昇するマントルが厚いリソスフェアの下で極微小に融解したメルトが地殻となり、プレートテクトニクス以降は、マントルが海嶺 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 63(0), 159, 2016

    J-STAGE

  • Composition of the Hadean oceanic crust and its hydrous melting experiment: For the investigation of the Hadean oceanic and continental crust composition  [in Japanese]

    Kondo Nozomi , Yoshino Takashi , Kogiso Tetsu

    冥王代の地殻は、その生成・リサイクルを通して、マントルの化学進化を理解する鍵となりうる。さらに、冥王代大陸地殻の存在や化学組成は、冥王代の大気・海洋組成に影響し、生命の誕生・進化にも関わる重要な問題である。本研究では、高温高圧融解実験を用いて冥王代地殻の化学組成を解明することを試みる。カンラン岩の高温高圧融解実験データから冥王代海洋地殻組成を推定すると、マントルポテンシャル温度の高い冥王代において …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 62(0), 124, 2015

    J-STAGE

  • Residues of Hydrous Peridotites in the Deep Earth's upper Mantle:Implications of Melting Experiments at High Pressures and High Temperatures  [in Japanese]

    MATSUKAGE Kyoko

    …  Chemical differentiation from pyrolitic lherzolite to harzburgite due to partial melting and melt extraction process causes the chemical heterogeneity in the Earth's upper mantle. … Phase relation and chemical variations of residues obtained with melting experiments of dry and hydrous pyrolitic lherzolite are compared to understand the effects of water on chemical differentiation. …

    Journal of Geography (Chigaku Zasshi) 124(3), 355-370, 2015

    J-STAGE

  • Geochemical and Sr–Nd–Pb isotopic compositions of lithospheric mantle: Spinel lherzolites in alkaline basalts from the northwestern Ethiopian plateau

    MESHESHA Daniel , SHINJO Ryuichi , ORIHASHI Yuji

    … The geochemical characteristics of mantle xenoliths (spinel lherzolites) in Quaternary alkaline basalts from the northwestern Ethiopian plateau provide new insight into the conditions of melting associated with the Afar plume. … The high modal content of the clinopyroxene (14–23%) indicate that the mantle xenoliths are fertile spinel lherzolites that have experienced insignificant partial melting. …

    Journal of Mineralogical and Petrological Sciences 109(6), 241-257, 2014

    J-STAGE

  • Origin of Mg- and Si-rich continental cratonic mantle  [in Japanese]

    MATSUKAGE Kyoko N.

    日本鉱物科学会年会講演要旨集 2013, 7, 2013-09-05

  • Coseismic dehydration of serpentinite: Evidence from high-velocity friction experiments

    Lin Aiming , Takano Soichiro , Hirono Tetsuro , Kanagawa Kyuichi

    … (iii) rapid serpentine dehydration occurred in a zone of up to ~ 3 mm wide, including the slip zone and its bounding zones, accompanying frictional melting during high-velocity slip; … and (iv) no distinct dehydration or frictional melting occurred during low-velocity slip (< …

    Chemical Geology (344), 50-62, 2013-04-19

    IR

  • Mantle-derived arc related mafic enclaves and host orthogneiss from the Shyok Suture Zone of NE Ladakh, India : An evidence of magma-mixing

    RAMESHWAR RAO D. , DAGA MEGHA M. , RAI HAKIM

    … The crustal growth in the Shyok Suture Zone (SSZ) can be explained by two stage melting process involving the generation of orthogneiss (OG) with mafic enclaves (ME) (pre-collision), and temporal evolution towards increasingly more evolved felsic magmas during reworking processes (post-collision). … The ME has formed by low degree of partial melting of a garnet-bearing source or from the partial melting of a basaltic source with a clinopyroxene-garnet eclogite as residue. …

    GEOCHEMICAL JOURNAL 47(1), 1-19, 2013-02-01

    J-STAGE References (81)

  • Origin of Mg- and Si-rich continental cratonic mantle  [in Japanese]

    Matsukage kyoko

    大陸クラトン下のマントルは海洋やオフクラトンのマントルに比べてMgとSiに富むという特異な化学組成を有している。本研究では、このような特異な化学組成をもつクラトンマントルが含水条件下で形成したのではないかと考え、FeOやアルカリ元素を含む主要10成分からなるパイロライトの部分融解実験を上部マントルの広い圧力範囲で行った。実験結果からクラトンマントルは含水部分融解による単純な融け残り岩であると考えら …

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2013(0), 7, 2013

    J-STAGE

  • Differentiation of island arc low-K tholeiite magma: A review from experimental petrology  [in Japanese]

    Hamada Morihisa

    本発表では、島弧の火山フロントの火山の一つである伊豆大島火山から噴出する島弧ソレアイトマグマを例として、過去40,000年間噴火史を通じた噴出物の化学組成と含水融解実験の既報データに比較・検討することにより、島孤ソレアイトマグマの分化条件について再検討を行う。同一の親マグマから伊豆大島火山の分化マグマの組成バリエーションを導くためには、メルトが水に飽和しており、深度(圧力)に応じてメルトの含水量が …

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2013(0), 32, 2013

    J-STAGE

  • Hydrothermal activity in Enceladus inferred from silica formation  [in Japanese]

    Sekine Yasuhito , Shibuya Takazo , Suzuki Katsuhiko , Kuwatani Tatsu , Masaki Yuka , Tachibana Shogo

    土星氷衛星エンセラダスは、南極付近の広範囲にプリューム活動を示すなど、地質的に活発であることが惑星探査によって明らかになった。このプリューム物質には、水の他に始原的な揮発性物質を含み、ナトリウムに富む粒子も存在することから、内部には液体の水の海が存在していることが明らかになっている。近年のプリューム粒子のその場分析によって、プリューム内には高濃度のシリカコロイドが含まれていることが明らかになった。 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 60(0), 173, 2013

    J-STAGE

  • Hydrous and anhydrous melting experiments of an alkali basalt and a transitional tholeiite from the Oginosen volcano, Southwest Japan : The possible influence of melt depolymerization on Ca-Na partitioning between plagioclase and the melt

    HONMA Ushio

    … The experiments were conducted at 0.1 MPa, and hydrous 100 MPa and 200 MPa conditions. …

    Journal of Mineralogical and Petrological Sciences 107(1), 8-32, 2012-02-01

    J-STAGE References (50)

  • Errata

    … The following are errata for the original article entitled “<b>Hydrous and anhydrous melting experiments of an alkali basalt and a transitional tholeiite from the Oginosen volcano, Southwest Japan: The possible influence of melt depolymerization on Ca-Na partitioning between plagioclase and the melt</b>” …

    Journal of Mineralogical and Petrological Sciences 107(2), 120-120, 2012

    J-STAGE

  • A3-06 Hydrogen concentration in plagioclase as a hygrometer of magmas: Approaches from melt inclusion analyses and hydrous melting experiments  [in Japanese]

    Hamada M. , Ushioda M. , Fujii T. , Takahashi E.

    PROGRAMME AND ABSTRACTS THE VOLCANOLOGICAL SOCIETY OF JAPAN 2012(0), 39, 2012

    J-STAGE

  • Experiments on the partitioning of hydrogen between plagioclase and basaltic melt  [in Japanese]

    HAMADA Morihisa , USHIODA Masashi , TAKAHASHI Eiichi

    日本鉱物科学会年会講演要旨集 2011, 84, 2011-09-05

  • Estimation of H_2O concentration in primary arc magmas : constraints from melting experiments and analyses of melt inclusions  [in Japanese]

    HAMADA Morihisa , TOMIYA Akihiko

    …   The slab-derived fluids and/or hydrous slab melts released from a subducted slab ascend into the mantle wedge, lower its melting temperature and thus induce generation of hydrous arc magmas. … Melting experiments of hydrous primary arc magmas have clarified that the <i>P</i>-T condition of magma generation shifts toward lower temperature and higher pressure with increasing H<sub>2</sub>O concentration. …

    Japanese Magazine of Mineralogical and Petrological Sciences 40(3), 91-100, 2011-05-30

    J-STAGE References (69)

Page Top