Updated on 2022/08/06

写真a

 
MORIGUTI Takuya
 
Organization
Institute for Planetary Materials Associate Professor
Position
Associate Professor
External link

Degree

  • Ph.D. ( Okayama University )

Research Interests

  • Crust-mantle recycling

  • magma ocean

  • 微量元素

  • Highpressure experiment

  • Geochemistry

  • Isotope

  • 同位体

  • Trace element

  • 地球化学

Research Areas

  • Natural Science / Solid earth sciences

  • Natural Science / Space and planetary sciences

  • Natural Science / Solid earth sciences

Education

  • Okayama University   自然科学研究科   物質科学

    1991.4 - 1995.3

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    Country: Japan

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  • Okayama University    

    - 1995

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  • 信州大学大学院理学研究科修士課程地質学専攻    

    1989.4 - 1991.3

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  • Shinshu University    

    1985.4 - 1989.3

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Research History

  • Okayama University   The Institute for Planetary Materials

    2016.4

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  • 岡山大学地球物質科学研究センター 准教授

    2007.4 - 2016.3

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  • 岡山大学地球物質科学研究センター 助教授

    2005.10 - 2007.3

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  • 岡山大学地球物質科学研究センター助手

    2005.4 - 2005.9

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  • 岡山大学固体地球研究センター 助手

    1998.7 - 2005.3

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  • 岡山大学固体地球研究センター 中核的研究機関研究員

    1997.6 - 1998.6

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  • 日本学術振興会特別研究員

    1995.4 - 1997.5

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Professional Memberships

 

Papers

  • Melting phase equilibrium relations in the MgSiO3-SiO2 system under high pressures Reviewed

    Takuya Moriguti, Yusuke Yachi, Akira Yoneda, Eiji Ito

    American Mineralogist   2022

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

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  • Circa 1 Ga sub-seafloor hydrothermal alteration imprinted on the Horoman peridotite massif Reviewed

    Lalindra V. Ranaweera, Tsutomu Ota, Takuya Moriguti, Ryoji Tanaka, Eizo Nakamura

    Scientific Reports   8 ( 1 )   2018.12

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1038/s41598-018-28219-x

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    Other Link: http://www.nature.com/articles/s41598-018-28219-x

  • Trace element and isotopic geochemistry of Cretaceous magmatism in NE Asia: Spatial zonation, temporal evolution, and tectonic controls Reviewed

    Petr L. Tikhomirov, Elena A. Kalinina, Takuya Moriguti, Akio Makishima, Katsura Kobayashi, Eizo Nakamura

    LITHOS   264   453 - 471   2016.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    Results of a comprehensive geochemical study (major and trace elements, and isotopes of Sr, Nd, Pb, Hf) of Cretaceous volcanic rocks from the Chukotka area in northeastern Russia are presented. Synthesis of available geological and geochronological data suggests diachronous onset of activity of the Okhotsk-Chukotka volcanic belt (OCVB), the largest magmatic province in the region. The OCVB consists of ca. 10(6) km(3) of volcanic rocks. At 106-105 Ma, subduction-related magmatism initiated in the southern and central segments of the OCVB. In the Central and Northern Chukotka areas, where the northern OCVB is exposed, onset of arc magmatism occurred ca. 10 m.y. after extension-related magmatism of the Chaun igneous province at 109-104 Ma. Mafic rocks from the OCVB yield (Sr-87/Sr-86)(80) (Ma) of 0.7033 to 0.7047, epsilon Nd-80 (Ma) of 0.0 to 7.10, epsilon Hf-80 (Ma) of 4.12 to 12.88, ((206)pw(204)pb)(80 Ma) of 18.11 to 18.42, and ((208)pb/(204)pb)(80 Ma) of 37.96 to 38.21. Volcanic rocks from the Chaun province, as well as OCVB rocks from Northern Chukotka, originate from a relatively enriched source and have (Sr-87/Sr-86)(80) (Ma) of 0.7088 to 0.7100, epsilon Nd-80 (Ma) of -5.81 to -3.42, epsilon Hf-80 (Ma) of -3.40 to -0.25, ((206)pb/(204)pb)(80 Ma) of 18.69 to 18.90, and ((208)pb/(204)pb)(80 Ma) of 38.65 to 38.86. No definitive across-arc elemental or isotopic zonation of the OCVB has been revealed, probably because of wide-scale crustal melting and subsequent contamination of mantle-derived melts. However, there is a clear along-arc isotopic zonation. In our interpretation, this results from heterogeneity of the subcontinental lithospheric mantle, which likely was a major contributor to the magma source. The similar isotopic signatures of silicic (dominantly crust-derived) and mafic (mantle-derived) volcanic rocks in each OCVB segment imply that remelting of juvenile mafic underplated material was the main process responsible for the crust-derived magma generation. These data from the major Cretaceous magmatic provinces of northeast Asia are synthesized in context of existing plate tectonic reconstructions. (C) 2016 Elsevier B.V. All rights reserved:

    DOI: 10.1016/j.lithos.2016.08.009

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  • A preliminary study on boron isotope fractionation of major rock-forming minerals in granite Reviewed

    Zhao KuiDong, Jiang ShaoYong, Eizo Nakamura, Takuya Moriguti, Wet HaiZhen

    ACTA PETROLOGICA SINICA   31 ( 3 )   740 - 746   2015.3

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    Language:Chinese   Publishing type:Research paper (scientific journal)   Publisher:SCIENCE PRESS  

    We present boron concentrations and boron isotopic compositions of whole-rocks and major rock-forming minerals (biotite, plagioclase, quartz) from two granites in South China. Biotite has highest boron concentrations, and plagioclase has medium boron concentrations. Quartz has very low boron concentrations. Boron in granite is predominantly present in the biotite and plagioclase structure replaced Si and/or Al. Trace boron in quartz may concentrate in the fluid inclusions. Biotite has lowest boron isotopic compositions and quartz has highest boron isotopic compositions. This study firstly proves that large differences of boron isotopic compositions exist between rock-forming minerals in granites. Boron isotopic fractionation between biotite and plagioclase is -9.3 parts per thousand for the Dadongshan granite and -6.6 parts per thousand for the Qianlishan granite, respectively. Boron isotopic fractionation between biotite and quartz is -9.9 parts per thousand for the Dadongshan granite and -10.2 parts per thousand for the Qiardishan granite, respectively. Combining oxygen isotopic data, we suggest the large boron isotopic differences between minerals may be induced by post-magma hydrothermal alteration. The T-dependent fractionation factor of boron isotopes between silicates containing tetrahedrally coordinated boron and neutral-acid fluids is approximated by the equation: 1000ln alpha(silicate-fluid) = -11.19 x (10(3)/T[K]) + 5.09. The main fractionation effect is due to the change from trigonal coordination of boron in fluids to tetrahedrally coordinated boron in silicates.

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  • Sediment-enriched adakitic magmas from the Daisen volcanic field, Southwest Japan Reviewed

    Maureen Feineman, Takuya Moriguti, Tetsuya Yokoyama, Sakiko Terui, Eizo Nakamura

    GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS   14 ( 8 )   3009 - 3031   2013.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER GEOPHYSICAL UNION  

    The Quaternary Southwest Japan Arc is a product of subduction of the hot, young Philippine Sea Plate beneath the Eurasian Continental Plate. The magmas erupted from the Southwest Japan Arc belong to a category of magmas commonly referred to as adakites or adakitic magmas. These magmas show trace element evidence for interaction with garnet at depth, and may be associated with partial melting of subducted altered oceanic crust. Also found throughout the southern Sea of Japan region are alkali basalts with little apparent connection to the subduction zone. We have determined major element, trace element, and Sr, Nd, Pb, and U-Th isotopic compositions for a bimodal suite of lavas erupted at the Daisen volcanic field in the Southwest Japan Arc. These magmas consist of mildly alkaline basalts and a calcalkaline intermediate suite, separated by a approximate to 10 wt.% silica gap. The intermediate magmas show trace element and isotopic evidence for interaction with garnet, consistent with partial melting of the hot, young (approximate to 20 Ma) Philippine Sea Plate. The Daisen intermediate magmas are distinct from other adakitic magmas in their radiogenic isotopic characteristics, consistent with a significant contribution (approximate to 25%) from subducted Nankai Trough sediments. Our data suggest that the basalts erupted at the Daisen volcanic field are not parental to the intermediate magmas, and contain a small contribution of EM1-like mantle common in Sea of Japan alkali basalts but not apparent in the Daisen intermediate magmas.

    DOI: 10.1002/ggge.20176

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  • The lithium, boron and strontium isotopic systematics of groundwaters from an arid aquifer system: Implications for recharge and weathering processes Reviewed International coauthorship

    Karina Meredith, Takuya Moriguti, Paul Tomascak, Suzanne Hollins, Eizo Nakamura

    Geochimica et Cosmochimica Acta   112   20 - 31   2013.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    Saline groundwaters are common to inland Australia, but their hydrochemical evolution and origin remain largely unknown. The saline groundwaters in the alluvial aquifers of the Darling River have previously been found to exhibit broad similarity in traditional hydrochemical and isotopic tracers. By contrast, in this study the trace element isotopes (δ7Li, δ11B and 87Sr/86Sr) have illuminated more complex hydrogeochemical processes in the same aquifer system. This paper reports the first ever set of δ7Li values in any groundwater system in Australia. They varied from +5.8 to +16.2 with an average value of +9.7‰ (n=19) in the alluvial aquifers of the Darling River catchment. The δ11B values were all higher than seawater and close to some of the highest δ11B values ever reported in the literature for a groundwater system (+44.4 to +53.9
    average: +48.8, n=17). The 87Sr/86Sr ratios ranged from 0.708 to 0.713, with an average value of 0.709 (n=19). The differing signatures in these trace element isotope values, highlighted by discovery of the deeper older groundwater system with heavier Li isotope values and higher 87Sr/86Sr, is an important finding of this research. Simple mixing models between river water and saline groundwater cannot explain the observed variation in trace element isotopes. Hydrochemical evolution was found to be dependent on proximity to the Darling River and depth. Varying degrees of Li and B isotopic fractionation during water-sediment interaction were interpreted to account for the evolution of the saline groundwaters. The measurement of these trace element isotopes has permitted delineation of groundwater end-members that would have otherwise not been identified
    in their absence an inaccurate interpretation of the hydrochemical evolution of these saline groundwaters would have been made. This study highlights the importance of a multi-tracer approach, which includes trace element isotopes, in resolving complex geochemical processes in groundwater in semi-arid to arid zone environments. © 2013.

    DOI: 10.1016/j.gca.2013.02.022

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  • Devolatilization history and trace element mobility in deeply subducted sedimentary rocks: Evidence from Western Alps HP/UHP suites Reviewed

    Gray E. Bebout, Philippe Agard, Katsura Kobayashi, Takuya Moriguti, Eizo Nakamura

    CHEMICAL GEOLOGY   342   1 - 20   2013.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    Metapelitic rocks of the Schistes Lustre's in the Cation Alps, Italy (peak metamorphic conditions of 350-500 degrees C, 1.2-2.0 GPa) and at the UHP Lago di Cignana locality (Valtournenche, Italy; similar to 550 degrees C, 2.5-3.0 GPa) preserve records of prograde devolatilization in their mineral modes and chemistry, contents of volatiles and fluid-mobile elements (elements relatively mobile in aqueous fluids), and B and N isotope compositions. This suite allows study of prograde devolatilization history, across a wide range in metamorphic grade, in metasedimentary rocks that experienced high-P/T prograde paths similar to those experienced in most modern subduction zones.
    Across grade, whole-rock samples are in general uniform in their concentrations of relatively fluid-mobile elements N, B, Li, Cs, Ba, and Rb, normalized to the concentrations of the less mobile K2O and Al2O3, showing only hints of loss in several of the highest-grade samples. With increasing grade, ion microprobe analyses of phengites show subtle decrease in B concentration, uniformity in Ba and Cs concentrations, and increase in Li concentrations, the latter likely due to release from chlorite during its breakdown. In one Cignana sample, phengite inclusions in garnets are enriched in B relative to matrix phengite, consistent with either whole-rock B loss after garnet growth or, more likely, closed-system behavior and partitioning of B into paragonite or tourmaline stabilized after garnet growth. In samples with both paragonite and phengite, paragonite shows relative enrichment in B and Sr, and phengite is enriched in Cs, Ba, and presumably also N and Rb (the latter showing strong whole-rock correlations with K2O).
    Whole-rock delta N-15 shows a hint of shift to higher values in the highest grade rocks (Cignana) and, accordingly, calculated prograde dehydration histories for appropriate bulk compositions, using the Perple-X database, indicate that significant (similar to 20%) dehydration would for some rocks occur over the temperature interval of 450 to 550 degrees C, largely related to the breakdown of chlorite (and to a lesser extent carpholite). Small amounts of loss of N into these fluids could have resulted in minor shift in delta N-15, with decrease in whole-rock N concentration masked by heterogeneity inherent with the sedimentary protoliths. Partitioning of Cs and Li (possibly also Rb and Ba) from white micas into H2O-rich fluids largely produced by chlorite breakdown could similarly have produced the subtle decreases in the concentrations in these elements noted in several high-grade samples. Neoblastic tourmaline in higher-grade rocks likely sequestered some fraction of the B lost from micas, resulting in a lack of obvious whole-rock B loss to accompany the up-grade trend of decreasing B concentrations in phengite. This tourmaline shows core-to-rim decrease in delta B-11 consistent with growth during small amounts of progressive B loss from phengites.
    Taken together, the whole-rock and SIMS data presented here, and the whole-rock dataset of Busigny et al. (2003), demonstrate impressive retention, during prograde forearc devolatilization, of elements thought to be relatively fluid-mobile (particularly H, N, B, Li, Bo, and Cs). Retention of these elements in metasedimentary rocks subducted to depths overlapping those beneath arc volcanic fronts (similar to 90 km estimated for subsolidus, peak Cignana metamorphism) implies their availability for transfer into arc source regions, in aqueous fluids or silicate melts, or into the mantle to depths beyond subarc regions. (C) 2013 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.chemgeo.2013.01.009

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  • The Cretaceous Okhotsk–Chukotka Volcanic Belt (NE Russia): Geology, geochronology, magma output rates, and implications on the genesis of silicic LIPs Reviewed

    P.L. Tikhomirov, E.A. Kalinina, T. Moriguti, A. Makishima, K. Kobayashi, I.Yu. Cherepanova, E. Nakamura

    Journal of Volcanology and Geothermal Research   221-222   14 - 32   2012.4

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.jvolgeores.2011.12.011

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  • Space environment of an asteroid preserved on micrograins returned by the Hayabusa spacecraft Reviewed

    Eizo Nakamura, Akio Makishima, Takuya Moriguti, Katsura Kobayashi, Ryoji Tanaka, Tak Kunihiro, Tatsuki Tsujimori, Chie Sakaguchi, Hiroshi Kitagawa, Tsutomu Ota, Yusuke Yachi, Toru Yada, Masanao Abe, Akio Fujimura, Munetaka Ueno, Toshifumi Mukai, Makoto Yoshikawa, Jun'ichiro Kawaguchi

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   109 ( 11 )   E624 - E629   2012.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:NATL ACAD SCIENCES  

    Records of micrometeorite collisions at down to submicron scales were discovered on dust grains recovered from near-Earth asteroid 25143 (Itokawa). Because the grains were sampled from very near the surface of the asteroid, by the Hayabusa spacecraft, their surfaces reflect the low-gravity space environment influencing the physical nature of the asteroid exterior. The space environment was examined by description of grain surfaces and asteroidal scenes were reconstructed. Chemical and O isotope compositions of five lithic grains, with diameters near 50 mu m, indicate that the uppermost layer of the rubble-pile-textured Itokawa is largely composed of equilibrated LL-ordinary-chondrite-like material with superimposed effects of collisions. The surfaces of the grains are dominated by fractures, and the fracture planes contain not only sub-mu m-sized craters but also a large number of sub-mu m-to several-mu m-sized adhered particles, some of the latter composed of glass. The size distribution and chemical compositions of the adhered particles, together with the occurrences of the sub-mu m-sized craters, suggest formation by hypervelocity collisions of micrometeorites at down to nm scales, a process expected in the physically hostile environment at an asteroid's surface. We describe impact-related phenomena, ranging in scale from 10(-9) to 10(4) meters, demonstrating the central role played by impact processes in the long-term evolution of planetary bodies. Impact appears to be an important process shaping the exteriors of not only large planetary bodies, such as the moon, but also low-gravity bodies such as asteroids.

    DOI: 10.1073/pnas.1116236109

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  • Establishment of Comprehensive Analytical System for Terrestrial and Extraterrestrial Materials behind the Initial Analysis of Particles Returned by Hayabusa Spacecraft Invited Reviewed

    NAKAMURA Eizo, MAKISHIMA Akio, MORIGUTI Takuya, KOBAYASHI Katsura, TANAKA Ryoji, KUNIHIRO Tak, TSUJIMORI Tatsuki

    33 ( 12 )   681 - 686   2012

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1380/jsssj.33.681

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  • Fluid–rock interaction in the Qitianling granite and associated tin deposits, South China: Evidence from boron and oxygen isotopes Reviewed

    Kui-Dong Zhao, Shao-Yong Jiang, Eizo Nakamura, Takuya Moriguti, Martin R. Palmer, Shui-Yuan Yang, Bao-Zhang Dai, Yao-Hui Jiang

    Ore Geology Reviews   43 ( 1 )   243 - 248   2011.12

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.oregeorev.2011.07.002

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  • Degassing, crystallization and eruption dynamics at Stromboli: trace element and lithium isotopic evidence from 2003 ashes Reviewed

    Federica Schiavi, Katsura Kobayashi, Takuya Moriguti, Eizo Nakamura, Massimo Pompilio, Massimo Tiepolo, Riccardo Vannucci

    CONTRIBUTIONS TO MINERALOGY AND PETROLOGY   159 ( 4 )   541 - 561   2010.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:SPRINGER  

    During its 1800-year-long persistent activity the Stromboli volcano has erupted a highly porphyritic (HP) volatile-poor scoriaceous magma and a low porphyritic (LP) volatile-rich pumiceous magma. The HP magma is erupted during normal Strombolian explosions and lava effusions, while the LP one is related to more energetic paroxysms. During the March-April 2003 explosive activity, Stromboli ejected two typologies of juvenile glassy ashes, namely highly vesicular LP shards and volatile-poor HP shards. Their textural and in situ chemical characteristics are used to unravel mutual relationships between HP and LP magmas, as well as magma dynamics within the shallow plumbing system. The mantle-normalized trace element patterns of both ash types show the typical arc-lava pattern; however, HP glasses possess incompatible element concentrations higher than LP glasses, along with Sr and Eu negative anomalies. HP shards are generally characterized by higher Li contents (to similar to 20 ppm) and lower delta Li-7 values (+1.2 to -3.8aEuro degrees) with respect to LP shards (Li contents of 7-14 ppm and delta Li-7 ranging between +4.6 and +0.9aEuro degrees). Fractional crystallization models based on major and trace element compositions, combined with a degassing model based on open-system Rayleigh distillation and on the assumption that D-melt/fluid(Li) > 1, show that abundant (similar to 30%) plagioclase precipitation and variable degrees of degassing can lead the more primitive LP magma to evolve toward a differentiated (isotopically lighter) HP magma ponding in the upper conduit and undergoing slow continuous degassing-induced crystallization. This study also evidences that in March 2003 Stromboli volcano poured out a small early volume of LP magma that traveled slower within the conduit with respect to later and larger volumes of fast ascending LP magma erupted during the April 5 paroxysm. The different ascent rates and cooling rates of the two LP magma batches (i.e., pre- and post-paroxysm) resulted in small, but detectable, differences in their chemical signatures. Finally, this study highlights the high potential of in situ investigations of juvenile glassy ashes in petrologic and geochemical monitoring the volcanic activity and of Li isotopes as tracers of degassing processes within the shallow plumbing system.

    DOI: 10.1007/s00410-009-0441-2

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  • Slab decarbonation and CO2 recycling in the Southwestern Colombian volcanic arc Reviewed

    Maria I. Marin-Ceron, Takuya Moriguti, Akio Makishima, Eizo Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   74 ( 3 )   1104 - 1121   2010.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    The contribution of subducted carbonate sediments to the genesis of the Southwestern Colombian arc magmas was investigated using a comprehensive petrography and geochemical analysis, including determination of major and trace element contents and Sr, Nd, Hf and Pb isotope compositions. These data have been used to constrain the depth of decarbonation in the subducted slab, indicating that the decarbonation process continues into the sub-arc region, and ultimately becomes negligible in the rear arc. We propose on the basis of multi-isotope approach and mass balance calculations, that the most important mechanism to induce the slab decarbonation is the infiltration of chemically reactive aqueous fluids from the altered oceanic crust, which decreasingly metasomatize the mantle wedge, triggering the formation of isotopically different primary magmas from the volcanic front (VF) with relatively high Hf-176/Hf-177, high Sr-87/Sr-86, negative values of epsilon Nd and lower Pb isotopes compared to the rear arc (RA).
    The presence of more aqueous fluids at the volcanic front may increase the degree of decarbonation into carbonate-bearing lithologies. Moreover, with increasing pressure and temperature in the subduction system, the decrease in dehydration of the slab, leads to cessation of fluid-induced decarbonation reactions at the rear arc. This development allows the remaining carbonate materials to be recycled into the deep mantle. (C) 2009 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.gca.2009.10.031

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  • Sr-Nd-Hf-Pb isotopic characteristics of North-Western and Southern Ethiopian lithospheric mantle Reviewed

    Melesse A, Kunihiro T, Ota T, Tanaka R, Moriguti T, Nakamura E

    Geochimica Et Cosmochimica Acta   74 ( 12 )   A697   2010

  • Lithium isotopic systematics of peridotite xenoliths from Hannuoba, North China Craton: Implications for melt-rock interaction in the considerably thinned lithospheric mantle Reviewed

    Yan-Jie Tang, Hong-Fu Zhang, Eizo Nakamura, Takuya Moriguti, Katsura Kobayashi, Ji-Feng Ying

    GEOCHIMICA ET COSMOCHIMICA ACTA   71 ( 17 )   4327 - 4341   2007.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Li concentrations and isotopic compositions of coexisting minerals (ol, opx, and cpx) from peridotite xenoliths entrained in the Hannuoba Tertiary basalts, North China Craton, provide insight into Li isotopic fractionation between mantle minerals during melt-rock interaction in the considerably thinned lithospheric mantle. Bulk analyses of mineral separates show significant enrichment of Li in cpx (2.4-3.6 ppm) relative to olivine (1.2-1.8 ppm), indicating that these peridotites have been affected by mantle metasomatism with mafic silicate melts. Bulk olivine separates (delta Li-7 similar to +3.3 parts per thousand to +6.4 parts per thousand) are isotopically heavier than coexisting pyroxenes (delta Li-7 similar to -3.3 parts per thousand to -8.2 parts per thousand in cpx, and -4.0 parts per thousand to -6.7 parts per thousand in opx). Such large variation suggests Li elemental and isotopic disequilibrium. This conclusion is supported by results from in situ SIMS analyses of mineral grains where significant Li elemental and isotopic zonations exist. The olivine and opx have lower Li concentrations and heavier Li isotopes in the rims than in the cores. This reverse correlation of delta Li-7 with Li concentrations indicates diffusive fractionation of Li isotopes. However, the zoning patterns in coexisting cpx show isotopically heavier rims with higher Li abundances. This positive correlation between delta Li-7 and Li concentrations suggests a melt mixing trend. We attribute Li concentration and isotope zonation in minerals to the effects of two-stage diffusive fractionation coupled with melt-rock interaction. The earliest melts may have been derived from the subducted oceanic slab with low delta Li-7 values produced by isotopic fractionation during the dehydration of the seawater-altered slab. Melts at later stages were derived from the astheno-sphere and interacted with the peridotites, producing the Li elemental and isotopic zoning in mineral grains. These data thus provide evidence for multiple-stage peridotite-melt interaction in the lithospheric mantle beneath the northern North China Craton. (C) 2007 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.gca.2007.07.006

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  • Boron and lead isotope signatures of subduction-zone mélange formation: Hybridization and fractionation along the slab–mantle interface beneath volcanic arcs Reviewed

    Robert L. King, Gray E. Bebout, Marty Grove, Takuya Moriguti, Eizo Nakamura

    Chemical Geology   239 ( 3-4 )   305 - 322   2007.4

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.chemgeo.2007.01.009

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  • Elemental mixing systematics and Sr-Nd isotope geochemistry of melange formation: Obstacles to identification of fluid sources to arc volcanics Reviewed

    Robert L. King, Gray E. Bebout, Takuya Moriguti, Eizo Nakamura

    EARTH AND PLANETARY SCIENCE LETTERS   246 ( 3-4 )   288 - 304   2006.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    We present major and trace element concentrations in conjunction with Sr-Nd isotope ratios to investigate the geochemical characteristics of melange formation along the subduction zone slab-mantle interface. Melange matrix of the Catalina Schist formed within an active subduction zone of the southern California borderland in Cretaceous time. Melange formed through the synergistic effects of deformation and metasomatic fluid flow affecting peridotite, basaltic, and sedimentary protoliths to form hybridized bulk compositions not typical of seafloor "input" lithologies. In general, all elemental concentrations primarily reflect mechanical mixing processes, while fluid flow mediates all elemental systematios to a varying extent that is largely a function of inferred "mobility" for a particular element or the stability of suitable mineral hosts. Elemental data reveal that mineral stabilities defined by the evolution of bulk composition within melange zones are probably the most important control of solid, liquid, or fluid geochemistry within the subduction system. Sr-Nd isotope ratios are highly variable and reflect contributions of melange protoliths to varying extents. A weak mechanical mixing array present in Sr isotope data is strongly overprinted by a fluid signal that dominates melange Sr systematics. Nd isotope data suggest that Nd is more conservative during metamorphism and is largely controlled by mechanical mixing. We argue that melange formation is an intrinsic process to all subduction zones and that the geochemistry of melange will impart the strongest control on the geochemistry of metasomatic agents (hydrous fluids, silicate melts, or miscible supercritical liquids) progressing to arc magmatic source regions in the mantle wedge. Melange formation processes suggest that comparisons of subduction "inputs" to arc volcanic "outputs" as a means to infer recycling at subduction zones dangerously over-simplify the physics of the mass transfer in subduction zones, as subducted mass is consistently redistributed into novel bulk compositions. Such melange zones along the slab-mantle interface simultaneously bear characteristic elemental or isotopic signals of several distinct input lithologies, while experiencing phase equilibria not typical of any input. We recommend that future studies explore the phase equilibria of hybridized systems and mineral trace element residency, as these processes provide for a physical baseline from which it will be possible to follow the path of subducted mass through the system. (c) 2006 Elsevier B.V All rights reserved.

    DOI: 10.1016/j.epsl.2006.03.053

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  • Lithium, boron and lead isotope and trace element systematics of Quaternary basaltic volcanic rocks in northeastern Japan: mineralogical controls on slab-derived fluid composition Reviewed

    Takuya Moriguti, Tomoyuki Shibata, Eizo Nakamura

    Chemical Geology   212 ( 1-2 )   81 - 100   2004.11

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    DOI: 10.1016/j.chemgeo.2004.08.005

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  • Determination of Lithium Contents in Silicates by Isotope Dilution ICP-MS and its Evaluation by Isotope Dilution Thermal Ionisation Mass Spectrometry Reviewed

    Takuya Moriguti, Akio Makishima, Eizo Nakamura

    Geostandards and Geoanalytical Research   28 ( 3 )   371 - 382   2004.11

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    DOI: 10.1111/j.1751-908x.2004.tb00756.x

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  • Lithium, boron, and lead isotope systematics of glass inclusions in olivines from Hawaiian lavas: evidence for recycled components in the Hawaiian plume Reviewed

    Katsura Kobayashi, Ryoji Tanaka, Takuya Moriguti, Kenji Shimizu, Eizo Nakamura

    Chemical Geology   212 ( 1-2 )   143 - 161   2004.11

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    DOI: 10.1016/j.chemgeo.2004.08.050

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  • Evolution of an isotopically depleted mantle xenolith from salt lake crater, Hawaii Reviewed

    Nakamura E, Sakaguchi C, Tanaka R, Moriguti T, Kushiro I

    Geochimica Et Cosmochimica Acta   67 ( 18 )   A324   2003

  • An end-member component of Hawaiian mantle plume presented by a xenolith from Salt Lake Crater, Hawaii?

    NAKAMURA Eizo, SAKAGUCHI Chie, TANAKA Ryoji, MORIGUTI Takuya, KUSHIRO Ikuo

    Abstracts of Papers Presented at the Annual Meeting of The Japanese Association of Mineralogists, Petrologists and Economic Geologists   2002   251 - 251   2002

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    DOI: 10.14824/jampeg.2002.0.251.0

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  • Across-arc variation of Li isotopes in lavas and implications for crust/mantle recycling at subduction zones Reviewed

    Takuya Moriguti, Eizo Nakamura

    Earth and Planetary Science Letters   163 ( 1-4 )   167 - 174   1998.11

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    DOI: 10.1016/s0012-821x(98)00184-8

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  • High-yield lithium separation and the precise isotopic analysis for natural rock and aqueous samples Reviewed

    Takuya Moriguti, Eizo Nakamura

    Chemical Geology   145 ( 1-2 )   91 - 104   1998.3

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    DOI: 10.1016/s0009-2541(97)00163-0

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  • Geochemistry and cosmochemistry of lithium. Utility of the Li isotopes as a geochemical tracer. Reviewed

    Takuya MORIGUTI, Eizo NAKAMURA, Tsuyoshi ISHIKAWA

    JOURNAL OF MINERALOGY, PETROLOGY AND ECONOMIC GEOLOGY   88 ( 9 )   415 - 431   1993

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    DOI: 10.2465/ganko.88.415

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  • Precise Lithium Isotopic Analysis by Thermal Ionization Mass Spectrometry Using Lithium Phosphate as an Ion Source Material. Reviewed

    Takuya MORIGUTI, Eizo NAKAMURA

    Proceedings of the Japan Academy, Series B   69 ( 6 )   123 - 128   1993

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    A high-precision Li isotope analysis was developed for determining the Li+ ion emitted from lithium phosphate as an ion source material by a Re double-filament ionization method in the thermal ionization mass spectrometry. In this method, Li isotopic fractionation is distinctly less sensitive to the filament temperature than those in the previous methods, and stable and high ion beam intensity of more than 8×10-11 A for 7Li is obtained. These advantages in determining the 7Li/6Li ratio result in the analytical reproducibility of 0.26‰ (1σ). Furthermore, the sample preparation is simple and the low temperature (850°C) required by this method ensures the analysis of the isotopic composition of small amounts of Li with less influence of Li contamination to the sample, compared with the previous methods.

    DOI: 10.2183/pjab.69.123

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  • 13C enriched limestones from the Tono district, Kitakami Mountains, northern Japan Reviewed

    Morikiyo Toshiro, Okuyama (Kusunose) Yasuko, Tabata Hirokazu, Moriguchi Takuya, Sugai Hisashi, Iwamasa Kazuo, Ujiie Masumi

    Earth Science (Chikyu Kagaku)   46 ( 1 )   21 - 28   1992

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    Measurements were made of the carbon and oxygen isotope ratios of 39 limestones from the Tono district in the Kitakami Mountains, northern Japan. The limestones are assigned to either the Carboniferous or the Lower Permian. The δ13C values of the limestones range from -3.2 to 10.3‰ relative to the PDB standard. Eight samples are found to have δ13C values higher than 5‰, which are quite unusual for the limestones of marine origin. The δ18O values range from 17.4 to 30.3‰ relative to the SMOW standard and they are not different from those of Paleozoic marine limestones. The limestones have been subjected to thermal metamorphism by the Cretaceous granite (Tono mass). But the carbon isotopic anomaly of the limestones cannot be ascribed to the effects of the metamorphism. Although diagenetic reactions producing methane at the expense of organic matter may form 13C enriched carbonates in pelitic rocks, it seems unlikely that the process played an important role in altering whole-rock δ13C values of the limestones. Accordingly, it is concluded that the enrichment of 13C in the limestons formed at the time of deposition. This indicates the existence of an abnormal environment of deposition during the Carboniferous and the Permian period in the South Kitakami terrane.

    DOI: 10.15080/agcjchikyukagaku.46.1_21

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MISC

  • 地球惑星物質総合解析システムの構築と応用

    中村栄三, 牧嶋昭夫, 森口拓弥, 小林桂, 田中亮吏, 国広卓也, 北川宙, 太田努, 坂口千恵, 山中正博

    法政大学イオンビーム工学研究所シンポジウム講演予稿集   36th   2017

  • In situ geochemistry of garnet peridotites of Lashaine, Tanzania craton: Re-fertilization in subcratonic lithospheric mantle

    A. Basu Sarbadhikari, T. Tsujimori, T. Moriguti, T. Kunihiro, E. Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   74 ( 12 )   A58 - A58   2010.6

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  • Post-entrapment Li isotope fractionation in melt inclusions from Volcan Jorullo, Mexico

    Feineman, M, Johnson, E, Wallace, P, Kobayashi, K, Moriguti, T, Nakamura, E

    GEOCHIMICA ET COSMOCHIMICA ACTA   72   A261-A261   2008

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  • Large-scale fluid flow in a cold subduction-zone: SIMS Li-isotope study of jadeitite veins in Franciscan metagraywacke

    Tsujimori, T, Moriguti, T, Kunihiro, T, Kobayashi, K, Nakamura, E

    GEOCHIMICA ET COSMOCHIMICA ACTA   71   A1040-A1040   2007

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  • Melange zones as a better source for the "slab" signature in arcs

    RL King, GE Bebout, T Moriguti, E Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   69 ( 10 )   A654 - A654   2005.5

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  • The behavior of boron in hydrothermal alterations of granites

    KD Zhao, SY Jiang, E Nakamura, T Moriguti, YH Jiang, HF Ling

    GEOCHIMICA ET COSMOCHIMICA ACTA   69 ( 10 )   A791 - A791   2005.5

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  • Sources of magmatism at Daisen Volcano, Southwest Japan arc

    M Feineman, T Moriguti, E Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   69 ( 10 )   A638 - A638   2005.5

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  • Lithium, boron and lead isotope and trace element systematics of Quaternary basaltic volcanic rocks in northeastern Japan

    MORIGUTI Takuya, SHIBATA Tomoyuki, NAKAMURA Eizo

    2004   173 - 173   2004.9

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  • Lithium, Boron and Lead Isotope Systematics of Glass Inclusions in Olivines from Hawaiian Lavas : Evidence for Recycled Components in the Hawaiian Plume

    KOBAYASHI Katsura, TANAKA Ryoji, MORIGUTI Takuya, SHIMIZU Kenji, NAKAMURA Eizo

    2004   186 - 186   2004.9

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  • Geochemistry of melange formation: Identifying contributions from mechanical and metasomatic mixing

    RL King, GE Bebout, T Moriguti, E Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   67 ( 18 )   A218 - A218   2003.9

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  • Lithium and lead isotopes and trace element systematics of Quaternary basaltic volcanic rocks in Northeastern Japan

    T Moriguti, E Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   67 ( 18 )   A305 - A305   2003.9

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  • Comprehensive geochemical analyses of small amounts (&1t; 100 mg) of extraterrestrial samples for the analytical competition related to the sample return mission MUSES-C

    Nakamura Eizo, Makishima Akio, Moriguti Takuya, Kobayashi Katsura, Sakaguchi Chie, Yokoyama Tetsuya, Tanaka Ryoji, Kuritani Takeshi, Takei Hiroyuki

    The Institute of Space and Astronautical Science report. S.P.   16   49 - 101   2003.3

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    We have participated in the analytical competition related to the sample-return mission, MUSES-C of the ISAS, to be launched in May 2003 and returned in summer 2007. In this competition, we have determined major and trace element abundances and isotopes (as many as possible), both for two powdered samples provided by the ISAS and for chondrules separated from Allende meteorite as an additional demonstration of our high-spatial resolution analytical capabilities for fragment samples. 100 mg of each of the competition samples, 1C and 2C, were split into two fractions of approximately 30 and 70 mg for the determinations of elemental abundances and the isotope analyses, respectively. The bulk concentrations of 55 elements in each 30 mg sample were analyzed by quadruple-type ICP-MS and sector-type ICP-MS with analytical uncertainties better than 10 percent (1 sigma). B, Pb, Li, Rb, Sr, Sm and Nd were successively separated from the remaining 70 mg of each of the samples, using a novel integrated, multi-ion exchange column chemistry approach, and then the isotopes of these elements were successfully determined by TIMS with analytical errors similar to those for analyses of terrestrial samples. The Sr, Nd, Re and Os isotopic compositions were also analyzed using the remaining aliquots of the sample solutions for trace element analyses by ICP-MS. The results obtained in this study indicate that 1C and 2C samples are probably ordinary chondrite and the Allende meteorite, respectively. However, extreme W, Ta and Nb enrichments in the 1C were probably caused by contamination during sample preparation. Furthermore, both of the samples were extensively contaminated by B from the borosilicate glass container in which the samples were delivered. Five chondrules were separated from Allende meteorite and then sliced into three pieces using a dicing saw. The center slices were used to petrographically determine the mineral phases, compositionally map these phases by SEM-EDX, and obtain quantitative major and trace element compositions (30 elements) by SEM-EDX and ion microprobe. The two outer slices, for which sample masses were less than 1 mg, were chemically treated to obtain the bulk trace elements and isotope compositions of the chondrules. For the chondrule slices, 24 trace elements and Sr and Nd isotopic compositions were determined with extremely small analytical uncertainties by ICP-MS and TIMS (for Sr and Nd, respectively). Based on the analytical experience, including this competition, we believe that all of the analyses carried out could have been completed within 50 days if we could have concentrated on this project alone during that 50-day period. In this report, we describe the analytical techniques employed for the powdered samples and the chondrules, and we present all of the results obtained during the approximately 3-month period of the analytical competition.

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Presentations

  • Shock-induced deformation of pyroxene in Martian Regolith Breccias

    Cao, F, Flemming, R. L, Izawa, M. R. M, Moriguti, T, Agee, C. B

    GAC-MAC London 2021 Joint Annual Meeting 

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  • Melting phase equilibrium relations in MgSiO3–SiO2system at 13.5GPa

    Takuya MORIGUTI, Yusuke YACHI, Akira YONEDA, EijiITO

    2021.10.20 

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    Event date: 2021.10.18 - 2021.10.20

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  • Mineralogy, Petrology, and Geochemistry of Martian Regolith Breccias: Insights into The Martian Crust.

    Cao, F, Flemming, R. L, Izawa, M. R. M, Moriguti, T, Agee, C. B

    Goldshcmidt 2021  2021.7.5 

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    Event date: 2021.7.4 - 2021.7.9

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  • Melting phase equilibrium relations in the MgSiO3-SiO2 system at 13.5 GPa

    Moriguti, T, Yachi, Y, Yoneda, A, Ito, E

    JpGU 2021  2021.6.5 

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    Event date: 2021.5.31 - 2021.6.6

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  • 高圧条件下におけるMgSiO3-SiO2系の溶融相平衡関係

    森口拓弥, 谷内勇介, 米田 明, 伊藤英司

    第61回高圧討論会  2020.12.3 

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    Event date: 2020.12.2 - 2020.12.4

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  • Melting experiments in the system MgSiO3 – SiO2 at 13 GPa

    Moriguti, T, Yoneda, A, Ito, E

    JpGU 2020  2020.7.15 

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    Event date: 2020.7.12 - 2020.7.16

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  • 13GPaにおけるMgSiO3 – SiO2 系の溶融相平衡関係

    森口拓弥, 米田 明, 伊藤英司

    第60回高圧討論会  2019.10.25 

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    Event date: 2019.10.23 - 2019.10.25

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  • Melting phase equilibrium relations in the MgSiO3 – SiO2 system under high pressures

    Moriguti, T, Yoneda, A, Ito, E

    JpGU 2019  2019.5.29 

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    Event date: 2019.5.26 - 2019.5.30

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  • 高圧下におけるMgSiO3-SiO2系の溶融相平衡関係について

    森口拓弥, 米田 明, 伊藤英司

    第59回高圧討論会  2018.11.27 

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  • Phase equilibrium relations in MgSiO3 – SiO2 under high pressures International conference

    Moriguti, T, Yoneda, A, Ito, E

    JpGU2018  2018.5.24 

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    Event date: 2018.5.20 - 2018.5.24

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  • 高圧下におけるMgSiO3-SiO2系の溶融相平衡関係の解明

    森口拓弥, 米田 明, 伊藤英司

    第58回高圧討論会  2017.11.9 

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  • Melting relations in the system of MgSiO3 – SiO2 at high pressures, Makuhari Messe, Chiba, Japan International conference

    Moriguti, T, Yoneda, A, Ito, E

    JpGU  2017.5.21 

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  • Lithium isotope signatures of orogenic peridotites in Horoman massif International conference

    Ota, T, Watanabe, M, Lalindra V, Ranaweera, L. V, Moriguti, T, Kobayashi, K, Tanaka, R, Nakamura, E

    MISASA Internationa Symposium VI  2016.3.8 

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  • Processes after equilibration on Asteroid inferred from Ureilites International conference

    Debarati Das, Tak Kunihiro, Ryoji Tanaka, Takuya Moriguti, Nakamura E

    MISASA International Symposium V  2015.3.6 

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  • Deep sediment melts contribute to Southwest Japan adakitic magmas International conference

    Feineman, M, Moriguti, T, Yokoyama, T, Nakamura, E

    Goldschimdt Conference 2013  2013.8.25 

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  • Schistes Lustrés-Lago di Cignana HP/UHP Metasedimentary Rocks as a Reference Suite. International conference

    Bebout, G E, Agard, P, Kobayashi, K, Moriguti, T, Nakamura, E

    American Geophysical Union, Fall Meeting 2012  2012.12.3 

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  • Li-O-Pb-Nd-Hf isotope and trace element systematics and S in residual peridotites: Evidences for ancient hydrothermal fluid-rock interactions at mid-ocean ridges International conference

    Ranaweera, L.V, Moriguti, T, Tanaka, R, Makishima, A, Nakamura, E

    Goldschmidt Conference 2011  2011.8.14 

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  • はやぶさ回収試料の初期分析:回収試料個々の記載鉱物岩石学 Invited International conference

    辻森 樹, 国広卓也, 小林 桂, 田中亮吏, 森口拓弥, 太田 努, 北川 宙, 坂口千恵, 牧嶋昭夫, 中村栄三, 安部正真, 藤村彰夫, 向井利典

    日本地球惑星科学連合2011年大会  2011.5.26 

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  • はやぶさ回収試料の初期分析:地球物質科学的記載@三朝 Invited International conference

    中村栄三, 小林 桂, 牧嶋昭夫, 国広卓也, 辻森 樹, 田中亮吏, 森口拓弥, 太田 努, 北川 宙, 坂口千恵, 安部正真, 藤村彰夫, 向井利典

    日本地球惑星科学連合2011年大会  2011.5.26 

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  • はやぶさ回収試料の初期分析:回収試料個々の処理・解析法 Invited International conference

    小林 桂, 辻森 樹, 国広卓也, 田中亮吏, 森口拓弥, 太田 努, 北川 宙, 坂口千恵, 牧嶋昭夫, 中村栄三, 安部正真, 藤村彰夫, 向井利典

    日本地球惑星科学連合2011年大会  2011.5.26 

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  • In-Situ geochemistry of garnet peridotites of Lashaine, Tanazania craton: Re-fertilization in sub-cratonic lithospheric mantle International conference

    Sarbadhikari, B.A, Tsujimori, T, Moriguti, T, Kunihiro, T, Nakamura, E

    Goldschimdt Conference 2010  2010.6.13 

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  • Sr-Nd-Hf-Pb isotopic characteristics of North-Western and Southern Ethiopian lithospheric mantle. International conference

    Melesse, A, Kunihiro, T, Ota, T, Tanaka, R, Moriguti, T, Nakamura, E

    Goldschimdt Conference 2010  2010.6.13 

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  • Andesite magma generation at the Quaternary SW Colombian volcanic arc Invited International conference

    Marín-Cerón, M.I, Moriguti, T, Nakamura, E

    7th International Symposium on Andean Geodynamics  2008.9.2 

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  • Post-entrapment Li isotope fractionation in melt inclusions from Volcán Jorullo, Mexico International conference

    Feineman, M. D, Johnson, E, Wallace, P, Kobayashi, K, Moriguti, T, Nakamura, E

    Goldschimdt Conference 2008  2008.7.13 

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  • Lithium in melt inclusions records crustal assimilation at Volcan Jorullo, Mexico International conference

    Feineman, M. D, Johnson, E, Wallace, P, Kobayashi, K, Moriguti, T, Nakamura, E, Rubin, K

    American Geophysical Union, Fall Meeting 2007  2007.12.10 

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  • Boron-cycling by subducted lithosphere; insights from boron-isotope compositions of the Kokchetav tourmalines International conference

    Ota, T, Kobayashi, K, Moriguti, T, Nakamura, E

    American Geophysical Union, Fall Meeting 2007  2007.12.10 

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  • Large-scale fluid flow in a cold subduction-zone: SIMS Li-isotope study of jadeitite veins in Franciscan metagraywacke International conference

    Tsujimori, T, Moriguti, T, Kunihiro, T, Kobayashi, K, Nakamura, E

    Goldschimdt Conference 2007  2007.8.19 

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  • Major, trace and Pb isotopic systematics: involvement of slab derived fluids and lower continental crust interaction Invited International conference

    Marín-Cerón, M.I, Moriguti, T, Nakamura, E

    SOTA – State of the arc conference, 2007  2007.1.28 

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  • Li and B isotope systematics in crust-mantle recycling Invited International conference

    Moriguti, T, Kobayashi, K, Tanaka, R, Watanabe, R, Nakamura, E

    2nd Internationa Asia-Africa Science Platform Program seminar  2006.12.17 

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  • Lithium and Boron Isotope Systematics of Igneous and Metamorphic rocks Invited International conference

    Nakamura, E, Moriguti, T, Kobayashi, K, Tanaka, R, Watanabe, M

    The 2006 Joint Assembly of American Geophysical Union  2006.5.23 

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  • The behavior of boron in hydrothermal alteration of granites International conference

    Zhao, K.D, Jiang, S.-Y, Nakmaura, E, Moriguti, T, Jiang, Y.-H, Ling, H.-F

    Goldschmidt Conference 2005  2005.5.20 

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  • Sources of magmatism at Daisen volcano, southwest Japan arc International conference

    Feineman, M, Moriguti, T, Nakamura E

    Goldschmidt Conference 2005  2005.5.20 

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  • King, R.L., Bebout, G.E., Moriguti, T. and Nakamura, E. International conference

    Mélange zones as a, better, sources for the “slab”signature in arcs

    Goldschmidt Conference 2005  2005.5.20 

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  • Boron isotopic variations during hydrothermal alteration of granites Invited International conference

    Zhao, K-D, Jiang, S-Y, Nakamura, E, Moriguti, J-H, Jiang, Y-H, Ling, H-F, J-H. Yang

    COE-21 International Symposium MISASA  2005.3.5 

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  • A major and trace element study of lavas from Daisen Volcano International conference

    Feineman, M, Moriguti, T, Terui, S, Nakamura, E

    COE-21 International Symposium MISASA  2005.3.5 

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  • Evolution of an isotopically depleted spinel rhelzolite xenolith from Salt Lake Crater, and the search for the source of Hawaiian mantle plume: A case study based on the comprehensive geochemical analysis International conference

    Nakamura, E, Sakaguchi, C, Kobayashi, K, Tanaka, R, Moriguti, T, Kushiro, I

    COE-21 International Symposium MISASA  2005.3.5 

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  • Lithium, boron and lead isotope and trace element systematics of basaltic lavas in northeastern Japan: Mineralogical controls on slab-derived fluid composition International conference

    Moriguti, T, Shibata, T, Nakamura, E

    COE-21 International Symposium MISASA  2005.3.5 

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  • Development of high precision Li isotope analysis for olivine with high Resolution Secondary Ion Mass Spectrometery, and its application to the Horoman Peridotite complex: Implications for mantle metasomatism International conference

    Watanabe, M, Kobayashi, K, Moriguti, T, Nakamura, E

    COE-21 International Symposium MISASA  2005.3.5 

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  • Boron isotope geochemistry of tourmaline from granites in South China: An ion microprobe study Invited International conference

    Jiang, S-Y, Zhao, K-D, Nakamura, E, Kobayashi, K, Moriguti, T, Yang, J-H, Jiang, Y-H, Ling, H-F

    COE-21 International Symposium MISASA  2005.3.5 

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  • 東北日本弧第四紀玄武岩質岩類のリチウム・ホウ素・鉛同位体と微量元素システマティクス

    森口拓弥, 柴田知之, 中村栄三

    日本岩石鉱物鉱床学会2004年度学術講演会  2004.9.22 

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  • ハワイ火山岩のオリビンガラス包有物のリチウム・ホウ素・鉛同位体システマティクス

    小林 桂, 田中 亮吏, 森口 拓弥, 清水 健二, 中村 栄三

    日本岩石鉱物鉱床学会2004年学術講演会  2004.9.22 

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  • 微量元素およびリチウム・ホウ素・鉛同位体による島弧-沈み込み帯系における物質循環の解明

    森口拓弥, 柴田知之, 中村栄三

    産学官連携フェスティバル2004  2004.3 

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  • Lithium, boron and lead isotope systematics on glass inclusions in olivine phenocrysts from Hawaiian lavas International conference

    Kobayashi, K, Tanaka, R, Moriguti, T, Shimizu, K, Nakamura, E

    Goldschmidt Conference 2003  2003.9.7 

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  • Geochemistry of melange formation: Identifying contributions from mechanical and metasomatic mixing International conference

    King, R.L, Bebout, G.E, Moriguti, T, Nakamura, E

    Goldschmidt Conference 2003  2003.9.7 

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  • Evolution of an isotopically depleted mantle xenolith from Salt Lake Crater, Hawaii International conference

    Nakamura, E, Sakaguchi, C, Tanaka, R, Moriguti, T, Kushiro, I

    Goldschmidt Conference 2003  2003.9.7 

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  • Lithium and lead isotopes and trace element systematics of Quaternary basaltic volcanic rocks in Norteastern Japan International conference

    Moriguti, T, Nakamura, E

    Goldschmidt Conference 2003  2003.9.7 

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  • Li isotope variation of Koolau volcano, Hawaii

    Moriguti, T, Tanaka, R, Nakamura, E

    2002 

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  • ハワイアンプリューム端成分としてのマントル捕獲岩の発見?

    日本岩石鉱物鉱床学会2002年度学術講演会  2002 

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  • Comprehensive geochemical analyses of extremely small amounts of terrestrial and extraterrestrial materials for sample-return missions

    日本岩石鉱物鉱床学会2001年度学術講演会  2001 

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  • 高分解能二次イオン質量分析計を用いたリチウム・ホウ素同位体比測定とその応用

    小林 桂, 森口拓弥, 田中亮吏, 清水健二, 中村栄三

    日本岩石鉱物鉱床学会2001年度学術講演会  2001 

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  • Li isotope variation in Quaternary basaltic volcanic rocks in northeastern Japan

    Moriguti, T, Nakamura, E

    2001 

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  • 島弧火山岩におけるリチウム・ホウ素・鉛同位体の島弧横断方向の変化と沈み込み帯での地殻-マントル間の物質循環

    森口拓弥, 中村栄三

    地球惑星科学関連学会1998年合同大会  1998 

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  • 高精度Li同位体分析方法の開発とその島弧火成作用への適用

    森口拓弥, 中村栄三

    地球惑星科学関連学会1996年合同大会  1996 

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  • 泥質変成岩中における雲母のNH4・Rb・Cs含量について

    森口拓弥

    日本地質学会第98年学術大会  1991 

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  • 筑波変成岩類の雲母類中のアンモニウムについて

    森口拓弥

    日本地質学会第97年学術大会  1990 

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Industrial property rights

  • チタン試料中の微量元素を除去する方法

    牧嶋昭夫, 森口拓弥, 中村栄三

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    Application no:特願2008-105383  Date applied:2008.4.15

    Patent/Registration no:特許5327837  Date issued:2013.8.2

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