Updated on 2025/12/06

写真a

 
MAKISHIMA Akio
 
Organization
Scheduled update Professor
Position
Professor
External link

Research Interests

  • analytical chemistry

  • geochemistry

  • 生体物質分析化学

  • mass spectrometry

  • 分析化学

  • 地球化学

  • metallomics

  • inorganic mass spectrometry

Research Areas

  • Life Science / Human pathology

  • Natural Science / Space and planetary sciences

  • Nanotechnology/Materials / Analytical chemistry

  • Natural Science / Solid earth sciences

Education

  • The University of Tokyo   理学系研究科 修士課程   化学専攻

    1985.4 - 1987.3

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    Country: Japan

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  • The University of Tokyo   理学部   化学科

    1981.4 - 1985.3

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    Country: Japan

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  • The University of Tokyo   理学系研究科   博士(理学)の学位を取得

    1993.1

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Research History

  • Institute for Planetary Materials, Okayama University   Professor

    2005.4

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    Country:Japan

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  • Department of Earth and Planetary Sciences, Oxford University   Visiting Professor

    2000.2 - 2000.12

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    Country:United Kingdom

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  • Institute for the Earth's Interior, Okayama University   Associate Professor

    1996.4 - 2005.3

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    Country:Japan

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  • Institute for Study of the Earth's Interior   Assistant Professor

    1989.1 - 1996.3

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    Country:Japan

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  • Analytical Division, Nippon Steel Co. Ltd.   Researcher

    1986.4 - 1988.12

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    Country:Japan

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Professional Memberships

Committee Memberships

  • 岡山大学 自然科学研究科 地球物質科学専攻   専攻長  

    2007.4 - 2013.9   

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    Committee type:Other

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Papers

  • 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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    DOI: 10.1016/j.lithos.2016.08.009

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  • High-resolution MC-ICPMS employing amplifiers with a 10 12 ohm resistor for bulk sulfur determination in biological and geological samples Reviewed

    Akio Makishima, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   27 ( 5 )   891 - 895   2012.5

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    DOI: 10.1039/c2ja10337k

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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, Yu I. Cherepanova, E. Nakamura

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

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    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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    DOI: 10.1073/pnas.1116236109

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  • Simultaneous Determination of Cd, In, Tl and Bi by Isotope Dilution-Internal Standardisation ICP-QMS with Corrections Using Externally Measured MoO+/Mo+ Ratios Reviewed

    Akio Makishima, Hiroshi Kitagawa, Eizo Nakamura

    Geostandards and Geoanalytical Research   35 ( 1 )   57 - 67   2011.3

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    DOI: 10.1111/j.1751-908X.2010.00054.x

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  • Precise isotopic determination of Hf and Pb at sub-nano gram levels by MC-ICP-MS employing a newly designed sample cone and a pre-amplifier with a 1012 ohm register Reviewed

    Akio Makishima, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   25 ( 11 )   1712 - 1716   2010.11

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    DOI: 10.1039/c0ja00015a

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  • Chromium isotope systematics of achondrites: Chronology and isotopic heterogeneity of the inner solar system bodies Reviewed

    Akane Yamakawa, Katsuyuki Yamashita, Akio Makishima, Eizo Nakamura

    Astrophysical Journal   720 ( 1 )   150 - 154   2010.9

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    DOI: 10.1088/0004-637X/720/1/150

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  • Determination of Fluorine and Chlorine by Pyrohydrolysis and Ion Chromatography: Comparison with Alkaline Fusion Digestion and Ion Chromatography Reviewed

    Qiaoyun Wang, Akio Makishima, Eizo Nakamura

    Geostandards and Geoanalytical Research   34 ( 2 )   175 - 183   2010.6

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    DOI: 10.1111/j.1751-908X.2010.00043.x

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  • Precise elemental and isotopic analyses in silicate samples employing ICP-MS: Application of hydrofluoric acid solution and analytical techniques Invited Reviewed

    Akio Makishima, Ryoji Tanaka, Eizo Nakamura

    Analytical Sciences   25 ( 10 )   1181 - 1187   2009.10

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  • Determination of Ge, As, Se and Te in silicate samples using isotope dilution-internal standardisation octopole reaction cell ICP-QMS by normal sample nebulisation Reviewed

    Akio Makishima, Eizo Nakamura

    Geostandards and Geoanalytical Research   33 ( 3 )   369 - 384   2009.9

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    DOI: 10.1111/j.1751-908X.2009.00014.x

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  • Accumulation of radium in ferruginous protein bodies formed in lung tissue: Association of resulting radiation hotspots with malignant mesothelioma and other malignancies Reviewed

    Eizo Nakamura, Akio Makishima, Kyoko Hagino, Kazunori Okabe

    Proceedings of the Japan Academy Series B: Physical and Biological Sciences   85 ( 7 )   229 - 239   2009.7

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    DOI: 10.2183/pjab.85.229

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  • Comprehensive analysis for major, minor and trace element contents and Sr-Nd-Pb-Hf isotope ratios in sediment reference materials, JSd-1 and MAG-1 Reviewed

    B. Nagender Nath, Akio Makishima, Janine Noordmann, Ryoji Tanaka, Eizo Nakamura

    Geochemical Journal   43 ( 3 )   207 - 216   2009

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    DOI: 10.2343/geochemj.1.0018

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  • Highly unradiogenic lead isotope ratios from the horoman peridotite in japan Reviewed

    Sanjeewa P.K. Malaviarachchi, Akio Makishima, Masaaki Tanimoto, Takeshi Kuritani, Eizo Nakamura

    Nature Geoscience   1 ( 12 )   859 - 863   2008.12

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    DOI: 10.1038/ngeo363

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  • Multiple pulses of the mantle plume: Evidence from tertiary icelandic lavas Reviewed

    Hiroshi Kitagawa, Katsura Kobayashi, Akio Makishima, Eizo Nakamura

    Journal of Petrology   49 ( 7 )   1365 - 1396   2008.7

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    DOI: 10.1093/petrology/egn029

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  • Hawaiian double volcanic chain triggered by an episodic involvement of recycled material: Constraints from temporal Sr-Nd-Hf-Pb isotopic trend of the Loa-type volcanoes Reviewed

    Ryoji Tanaka, Akio Makishima, Eizo Nakamura

    Earth and Planetary Science Letters   265 ( 3-4 )   450 - 465   2008.1

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    DOI: 10.1016/j.epsl.2007.10.035

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  • New sequential separation procedure for Sr, Nd and Pb isotope ratio measurement in geological material using MC-ICP-MS and TIMS Reviewed

    Akio Makishima, B. Nagender Nath, Eizo Nakamura

    Geochemical Journal   42 ( 3 )   237 - 246   2008

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    DOI: 10.2343/geochemj.42.237

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  • New preconcentration technique of Zr, Nb, Mo, Hf, Ta and W employing coprecipitation with Ti compounds: Its application to Lu-Hf system and sequential Pb-Sr-Nd-Sm separation Reviewed

    Akio Makishima, Eizo Nakamura

    Geochemical Journal   42 ( 2 )   199 - 206   2008

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    DOI: 10.2343/geochemj.42.199

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  • Precise measurement of 228Ra/226Ra for 226Ra determination employing total integration and simultaneous 228Th correction by multicollector ICP-MS using multiple ion counters Reviewed

    Akio Makishima, Takele A. Chekol, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   23 ( 8 )   1102 - 1107   2008

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    DOI: 10.1039/b807431c

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  • Ancient recycled crust beneath the Ontong Java Plateau: Isotopic evidence from the garnet clinopyroxenite xenoliths, Malaita, Solomon Islands Reviewed

    Akira Ishikawa, Takeshi Kuritani, Akio Makishima, Eizo Nakamura

    Earth and Planetary Science Letters   259 ( 1-2 )   134 - 148   2007.7

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    DOI: 10.1016/j.epsl.2007.04.034

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  • Coprecipitation of Ti, Mo, Sn and Sb with fluorides and application to determination of B, Ti, Zr, Nb, Mo, Sn, Sb, Hf and Ta by ICP-MS Reviewed

    Yinghuai Lu, Akio Makishima, Eizo Nakamura

    Chemical Geology   236 ( 1-2 )   13 - 26   2007.1

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    DOI: 10.1016/j.chemgeo.2006.08.007

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  • Precise determination of Pb isotope ratios by simple double spike MC-ICP-MS technique without Tl addition Reviewed

    Akio Makishima, B. Nagender Nath, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   22 ( 4 )   407 - 410   2007

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    DOI: 10.1039/b616021b

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  • Accurate determination of 234U/238U and 230Th/232Th for U-Th disequilibria studies by MC-ICP-MS with simple bracketing Reviewed

    Akio Makishima, Takele A. Chekol, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   22 ( 11 )   1383 - 1389   2007

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    DOI: 10.1039/b706907c

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  • Purification of Hf in silicate materials using extraction chromatographic resin, and its application to precise determination of 176Hf/ 177Hf by MC-ICP-MS with 179Hf spike Reviewed

    Yinghuai Lu, Akio Makishima, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   22 ( 1 )   69 - 76   2007

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    DOI: 10.1039/b610197f

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  • Determination of Os and Re isotope ratios at subpicogram levels using MC-ICPMS with solution nebulization and multiple ion counting Reviewed

    Akio Makishima, Eizo Nakamura

    Analytical Chemistry   78 ( 11 )   3794 - 3799   2006.6

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    DOI: 10.1021/ac060183t

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  • Determination of major, minor and trace elements in silicate samples by ICP-QMS and ICP-SFMS applying isotope dilution-internal standardisation (ID-IS) and multi-stage internal standardisation Reviewed

    Akio Makishima, Eizo Nakamura

    GEOSTANDARDS AND GEOANALYTICAL RESEARCH   30 ( 3 )   245 - 271   2006

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    DOI: 10.1111/j.1751-908X.2006.tb01066.x

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  • Mg and Ca isotope fractionation during CaCO <inf>3</inf> biomineralisation Reviewed

    Veronica T.C. Chang, R. J.P. Williams, Akio Makishima, Nick S. Belshawl, R. Keith O'Nions

    Biochemical and Biophysical Research Communications   323 ( 1 )   79 - 85   2004.10

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    DOI: 10.1016/j.bbrc.2004.08.053

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  • Suppression of Zr, Nb, HF, and Ta co-precipitation during HF digestion of Ca-rich geological materials Reviewed

    Tanaka R, Kitagawa H, Makishima A, Nakamura E

    Geochimica Et Cosmochimica Acta   67 ( 18 )   A475 - 1463   2003

  • Purification of Mg from low-Mg biogenic carbonates for isotope ratio determination using multiple collector ICP-MS Reviewed

    Veronica T.C. Chang, Akio Makishima, Nick S. Belshaw, R. Keith O'Nions

    Journal of Analytical Atomic Spectrometry   18 ( 4 )   296 - 301   2003

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    DOI: 10.1039/b210977h

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  • Suppression of Zr, Nb, Hf and Ta coprecipitation in fluoride compounds for determination in Ca-rich materials Reviewed

    Ryoji Tanaka, Akio Makishima, Hiroshi Kitagawa, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   18 ( 12 )   1458 - 1463   2003

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    DOI: 10.1039/b309948b

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  • High precision measurement of titanium isotope ratios by plasma source mass spectrometry Reviewed

    X. K. Zhu, A. Makishima, Y. Guo, N. S. Belshaw, R. K. O'Nions

    International Journal of Mass Spectrometry   220 ( 1 )   21 - 29   2002.9

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    DOI: 10.1016/S1387-3806(02)00767-4

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  • Separation of titanium from silicates for isotopic ratio determination using multiple collector ICP-MS Reviewed

    Akio Makishima, Xiang Kun Zhu, Nick S. Belshaw, R. Keith O'Nions

    Journal of Analytical Atomic Spectrometry   17 ( 10 )   1290 - 1294   2002

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    DOI: 10.1039/b204349a

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  • A group separation method for ruthenium, palladium, rhenium, osmium, iridium, and platinum using their bromo complexes and an anion exchange resin Reviewed

    A. Makishima, M. Nakanishi, E. Nakamura

    Analytical Chemistry   73 ( 21 )   5240 - 5246   2001.11

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    DOI: 10.1021/ac010615u

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  • Determination of total sulfur at microgram per gram levels in geological materials by oxidation of sulfur into sulfate with in situ generation of bromine using isotope dilution high-resolution ICPMS Reviewed

    A. Makishima, E. Nakamura

    Analytical Chemistry   73 ( 11 )   2547 - 2553   2001.6

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    DOI: 10.1021/ac001550i

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  • Precise analysis of 234U/238U ratio using UO<inf>2</inf>+ ion with thermal ionization mass spectrometry for natural samples Reviewed

    Tetsuya Yokoyama, Akio Makishima, Eizo Nakamura

    Chemical Geology   181 ( 1-4 )   1 - 12   2001

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    DOI: 10.1016/S0009-2541(01)00270-4

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  • Evaluation of the coprecipitation of incompatible trace elements with fluoride during silicate rock dissolution by acid digestion Reviewed

    Tetsuya Yokoyama, Akio Makishima, Eizo Nakamura

    Chemical Geology   157 ( 3-4 )   175 - 187   1999.5

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    DOI: 10.1016/S0009-2541(98)00206-X

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  • Determination of zirconium, niobium, hafnium and tantalum at ng g -1 levels in geological materials by direct nebulisation of sample HF solution into FI-ICP-MS Reviewed

    Akio Makishima, Eizo Nakamura, Toshio Nakano

    Geostandards Newsletter   23 ( 1 )   7 - 20   1999

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    DOI: 10.1111/j.1751-908X.1999.tb00555.x

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  • Determination of Boron in Silicate Samples by Direct Aspiration of Sample HF Solutions into ICPMS Reviewed

    Akio Makishima, Eizo Nakamura, Toshio Nakano

    Analytical Chemistry   69 ( 18 )   3754 - 3759   1997.9

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    DOI: 10.1021/ac970383s

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  • Ce isotope ratios of N-type MORB Reviewed

    Akio Makishima, Akimasa Masuda

    Chemical Geology   118 ( 1-4 )   1 - 8   1994.12

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    DOI: 10.1016/0009-2541(94)90166-X

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  • ジルコンをめぐる最近の話題-3-ジルコンの希土類元素地球化学 Reviewed

    牧嶋 昭夫, 中村 栄三

    岩鉱   89 ( 1 )   p1 - 14   1994.1

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  • Search for p-isotopic anomaly of cerium in the bulk Allende meteorite Reviewed

    Akio Makishima, Akimasa Masuda

    GEOCHEMICAL JOURNAL   28 ( 2 )   115 - 122   1994

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    DOI: 10.2343/geochemj.28.115

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  • ジルコンをめぐる最近の話題-2-重鉱物の晶出条件と希土類元素の分配 Reviewed

    牧嶋 昭夫, 中村 栄三

    岩鉱   88 ( 12 )   p533 - 547   1993.12

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  • Primordial Ce isotopic composition of the solar system Reviewed

    Akio Makishima, Akimasa Masuda

    Chemical Geology   106 ( 3-4 )   197 - 205   1993.6

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    DOI: 10.1016/0009-2541(93)90026-F

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  • New constraints on the 138La β-decay constant based on a geochronological study of granites from the Yilgarn Block, Western Australia Reviewed

    Akio Makishima, Eizo Nakamura, Syun iti Akimoto, Ian H. Campbell, Robert I. Hill

    Chemical Geology   104 ( 1-4 )   293 - 300   1993.2

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    DOI: 10.1016/0009-2541(93)90158-F

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  • ジルコンをめぐる最近の話題, I.U-Pb法によるジルコン年代学 Reviewed

    牧嶋昭夫

    岩鉱   88   496 - 516   1993

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  • Precise measurement of cerium isotope composition in rock samples Reviewed

    Akio Makishima, Eizo Nakamura

    Chemical Geology   94 ( 1 )   1 - 11   1991

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    DOI: 10.1016/S0009-2541(10)80012-9

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  • Characterization of surface oxide layer of iron particles for magnetic recording II. Surface oxide layer of further oxidized iron particles in high humidity Reviewed

    Akio Makishima, Yukihiro Yamamoto, Kohji Watanabe

    Bulletin of the Chemical Society of Japan   63 ( 11 )   3189 - 3192   1990.11

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    DOI: 10.1246/bcsj.63.3189

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  • Characterization of the surface oxide layer on iron particles for magnetic recording by Mossbauer spectrometry Reviewed

    A. Makishima, Y. Yamamoto, K. Watanabe

    Bulletin of the Chemical Society of Japan   63 ( 1 )   147 - 150   1990

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    DOI: 10.1246/bcsj.63.147

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  • 138La β-decay constant estimated from geochronological studies Reviewed

    A. Masuda, H. Shimizu, S. Nakai, A. Makishima, S. Lahti

    Earth and Planetary Science Letters   89 ( 3-4 )   316 - 322   1988.8

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    DOI: 10.1016/0012-821X(88)90119-7

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  • Precise measurement of cerium and lanthanum isotope ratios. Reviewed

    Makishima Akio, Shimizu Hiroshi, Masuda Akimasa

    J. Mass Spectrom. Soc. Jpn.   35 ( 2 )   64 - 72   1987

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    The isotope ratios of cerium and lanthanum are determined precisely by a surface ionization mass spectrometer. 138Ce/142Ce and 140Ce/142Ce ratios for Ce standard solution are 0.0225762± 0.0000014 (2σ) and 7.9471±0.0003 (2σ), normalized to 136Ce/142Ce=0.01688, respectively. 138La/139La ratio is 0.0009025±0.0000005 (2σ). The oxygen isotope ratios in measurements of REE as oxide ions are 0.0003916±0.0000014 (2σ) and 0.002129±0.000010 (2σ) for 17O/16O and 18O/16O. The isotopic abundances (%) of 136Ce, 138Ce, 140Ce and 142Ce are calculated to be 0.1878, 0.2512, 88.433 and 11.128, respectively. The isotopic abundances (%) of 138La and 139La are calculated to be 0.09016 and 99.9098. These isotopic abundances obtained here give the following relation:<br>(138La/142Ce)ATOMIC=0.008173×(La/Ce)WEIGHT.<br>These precise isotopic abundances on Ce and La are fundamental values in a La-Ce geochronometer.

    DOI: 10.5702/massspec.35.64

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00215823814?from=CiNii

  • Cu purification using an extraction resin and Cu(I) for isotope ratio determination by MC-ICP-MS. Reviewed

    Makishima, A

    chromatography   1   96 - 107   2014

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  • Low-blank chemistry for Zn stable isotope ratio determination using extraction chromatographic resin and double spike-multiple collector-ICP-MS Reviewed

    Akio Makishima, Eizo Nakamura

    Journal of Analytical Atomic Spectrometry   28 ( 1 )   127 - 133   2013.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1039/c2ja30271c

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  • A simple and fast separation method of Fe employing extraction resin for isotope ratio determination by multicollector ICP-MS. Reviewed

    Makishima, A

    International Journal of Mass Spectrometry and Chromatography   1   195 - 203   2013

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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

    Journal of the Surface Science Society of Japan (Hyomen Kagaku)   33 ( 12 )   681 - 686   2012.12

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

    DOI: 10.1380/jsssj.33.681

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  • Melt-peridotite reactions and fluid metasomatism in the upper mantle, revealed from the geochemistry of peridotite and Gabbro from the Horoman peridotite Massif, Japan Reviewed

    Sanjeewa P.K. Malaviarachchi, Akio Makishima, Eizo Nakamura

    Journal of Petrology   52 ( 6 )   1237 - 1237   2011.6

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    DOI: 10.1093/petrology/egr017

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  • Melt-peridotite reactions and fluid metasomatism in the upper mantle, revealed from the geochemistry of peridotite and gabbro from the Horoman peridotite massif, Japan Reviewed

    Sanjeewa P.K. Malaviarachchi, Akio Makishima, Eizo Nakamura

    Journal of Petrology   51 ( 7 )   1417 - 1445   2010.6

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    DOI: 10.1093/petrology/egq024

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  • Precise determination of Cr, Mn, Fe, Co and Ni concentration by an isotope dilution-internal standardization method employing high resolution MC-ICP-MS Reviewed

    Akio Makishima, Akane Yamakawa, Katsuyuki Yamashita, Eizo Nakamura

    Chemical Geology   274 ( 1-2 )   82 - 86   2010.6

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    DOI: 10.1016/j.chemgeo.2010.03.018

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  • Slab decarbonation and CO<inf>2</inf> recycling in the Southwestern Colombian volcanic arc Reviewed

    Maria I. Marín-Cerón, Takuya Moriguti, Akio Makishima, Eizo Nakamura

    Geochimica et Cosmochimica Acta   74 ( 3 )   1104 - 1121   2010.2

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    DOI: 10.1016/j.gca.2009.10.031

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  • アスベスト小体と悪性胸膜中皮腫 Reviewed

    中村栄三, 牧嶋昭夫, 岡部和倫

    感染・炎症・免疫   40   184 - 186   2010

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  • Cr isotope systematics of Ureilites

    Yamakawa Akane, Yamashita Katsuyuki, Makishima Akio, Nakamura Eizo

    Abstracts of Annual Meeting of the Geochemical Society of Japan   57   270 - 270   2010

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    DOI: 10.14862/geochemproc.57.0.270.0

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  • Chemical separation and mass spectrometry of Cr, Fe, Ni, Zn, and Cu in terrestrial and extraterrestrial materials using thermal ionization mass spectrometry Reviewed

    Akane Yamakawa, Katsuyuki Yamashita, Akio Makishima, Eizo Nakamura

    Analytical Chemistry   81 ( 23 )   9787 - 9794   2009.12

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    DOI: 10.1021/ac901762a

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  • Mn-Cr age of CB chondrite

    Yamashita Katsuyuki, Yamakawa Akane, Maruyama Seiji, Makishima Akio, Nakamura Eizo

    Abstracts of Annual Meeting of the Geochemical Society of Japan   56   71 - 71   2009

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    DOI: 10.14862/geochemproc.56.0.71.0

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  • Simultaneous determination of Li, Be, Rb, Sr, Y, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Pb, Th and U by isotope dilution and internal standardization (ID-IS) method by ICP-MS

    MAKISHIMA Akio, KITAGAWA Hiroshi, SAKAGUCHI Chie, NAKAMURA Eizo

    Abstracts of Papers Presented at the Annual Meeting of The Japanese Association of Mineralogists, Petrologists and Economic Geologists   2004   237 - 237   2004.9

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    Simultaneous determination of Li, Be, Rb, Sr, Y, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Pb, Th and U by isotope dilution and internal standardization (ID-IS) method by ICP-MS was developed.

    DOI: 10.14824/jampeg.2004.0.64.0

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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

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

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  • Comment on "determination of total sulfur at microgram-per-gram levels in geological materials by oxidation of sulfur into sulfate with in situ generation of bromine using isotope dilution high resolution ICPMS"

    W. Robert Kelly, Robert D. Vocke, Jacqueline L. Mann, Akio Makishima, Eizo Nakamura

    Analytical Chemistry   74 ( 24 )   6430 - 6432   2002.12

  • Determination of chromium, nickel, copper and zinc in milligram samples of geological materials using isotope dilution high resolution inductively coupled plasma-mass spectrometry Reviewed

    Akio Makishima, Katsura Kobayashi, Eizo Nakamura

    Geostandards Newsletter   26 ( 1 )   41 - 51   2002

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    DOI: 10.1111/j.1751-908X.2002.tb00622.x

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  • Formation and suppression of AlF<inf>3</inf> during HF digestion of rock samples in Teflon bomb for precise trace element analyses by ICP-MS and ID-TIMS Reviewed

    Hiroyuki Takei, Tetsuya Yokoyama, Akio Makishima, Eizo Nakamura

    Proceedings of the Japan Academy Series B: Physical and Biological Sciences   77 ( 1 )   13 - 17   2001.1

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    DOI: 10.2183/pjab.77.13

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  • Determination of titanium at μg g-1 levels in milligram amounts of silicate materials by isotope dilution high resolution inductively coupled plasma mass spectrometry with flow injection Reviewed

    Akio Makishima, Eizo Nakamura

    Journal of analytical atomic spectrometry   15 ( 3 )   263 - 267   2000

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    DOI: 10.1039/a909020g

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  • Determination of molybdenum, antimony and tungsten at sub μg g -1 levels in geological materials by ID-FI-ICP-MS Reviewed

    Akio Makishima, Eizo Nakamura

    Geostandards Newsletter   23 ( 2 )   137 - 148   1999

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    DOI: 10.1111/j.1751-908X.1999.tb00569.x

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  • Separation of thorium and uranium from silicate rock samples using two commercial extraction chromatographic resins Reviewed

    Tetsuya Yokoyama, Akio Makishima, Eizo Nakamura

    Analytical Chemistry   71 ( 1 )   135 - 141   1999

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    DOI: 10.1021/ac9805807

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  • Sr, Nd and Pb isotope systematics of Akagi volcano, Northeast Japan: Implications for interaction between island arc magma and lower crust Reviewed

    Katsura Kobayashi, Eizo Nakamura, Tomoyuki Shibata, Akio Makishima

    Proceedings of the Japan Academy Series B: Physical and Biological Sciences   73 ( 5 )   69 - 73   1997.5

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    DOI: 10.2183/pjab.73.69

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  • Suppression of matrix effects in ICP-MS by high power operation of ICP: Application to precise determination of Rb, Sr, Y, Cs, Ba, REE, Pb, Th and U at ng g-1 levels in milligram silicate samples Reviewed

    Akio Makishima, Eizo Nakamura

    Geostandards Newsletter   21 ( 2 )   307 - 319   1997

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    DOI: 10.1111/j.1751-908X.1997.tb00678.x

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  • インコンパティブル元素の挙動の解明へ向けた,新しい実験的・実証的手法の開発 Invited Reviewed

    牧嶋昭夫

    地球化学   31   27 - 34   1997

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  • A review of isotope geochemical studies for Iceland I. Isotope-geochemical characterization of Icelandic hot spot Reviewed

    MAKISHIMA Akio

    Journal of mineralogy,petrology and economic geology   90 ( 11 )   379 - 387   1995.11

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  • 同位体地球化学から見たアイスランド. II. アイスランドのフェルシックな火山岩の成因. Reviewed

    牧嶋昭夫

    岩鉱   90   413 - 413   1995

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  • The origin of p-isotopes and their isotopic anomalies Reviewed

    MAKISHIMA Akio, Lu Qi, MASUDA Akimasa

    Chikyukagaku   26 ( 1 )   41 - 50   1992

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    Authorship:Lead author   Language:Japanese   Publisher:The Geochemical Society of Japan  

    The origin of p-isotopes (proton rich isotopes) and their isotopic anomalies are reviewed in this article. The p-isotopes (84Sr,124Xe, 130Ba, 144Sm, 196Hg, etc.) are heavy isotopes (A≧74) which cannot be synthesized by s-process or r-process. The p-isotopes are considered to be produced by the transmutation of heavy elements into lighter p-isotopes via a series of (γ, n), (γ, p) and (γ, α) reactions in supernovae. We can constrain the site and the condition of nucleosynthesis in supernovae from abundances of the p-isotopes. The isotopic anomalies of the p-isotopes of Xe, Cd and Sn are found in acid residues of the Allende carbonaceous chondrite. The anomalies of 84Sr and 144Sm are also found in the Allende FUN inclusions. They are considered to be presolar origin. The anomalies of 196Hg are found, however, their origin still remains enigmatic. The anomaly of Mo isotopic abundances is found in the Sikhote-Alin iron meteorite. The anomaly can be explained by (γ, n) reaction chains of Mo. The further study of the Mo anomaly will give us interesting informations not only about the p-process, but also about the r-process effect on 93Nb, the double β--decay of 96Zr, and the (γ, n) reaction chain of 99Tc.

    DOI: 10.14934/chikyukagaku.26.41

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  • Calibration of Faraday cup efficiency in a multicollector mass spectrometer Reviewed

    Akio Makishima, Eizo Nakamura

    Chemical Geology   94 ( 2 )   105 - 110   1991

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    DOI: 10.1016/S0009-2541(10)80022-1

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  • ランタンーセリウム法の地球化学 Reviewed

    牧嶋昭夫, 中村栄三, 増田彰正

    火山   36   161 - 175   1991

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  • Determination of gallium in pure aluminum by isotope dilution analysis with solvent extraction using inductively coupled plasma mass spectrometry Reviewed

    Akio Makishima, Isamu Inamoto, Koichi Chiba

    Applied Spectroscopy   44 ( 1 )   91 - 95   1990

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    DOI: 10.1366/0003702904085840

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  • Problems in the measurement of cerium isotope ratios and its application to geochronology. Reviewed

    Makishima Akio

    J. Mass Spectrom. Soc. Jpn.   38 ( 4 )   165 - 173   1990

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)   Publisher:The Mass Spectrometry Society of Japan  

    Tanaka and Masuda1) first applied lanthanum-cerium isotope systematics to geochronology in 1982, using β-decay of 138La. In this systematics, it is necessary to measure cerium isotope ratio (ex. 138Ce/142Ce) with precision better than 0.01% because of long half life and low abundance of 138La. Many studies have been done to improve the precision and accuracy of the Ce isotope analysis. But there are some problems in the analysis, such as long data acquisition time and requirement of large amount of cerium. When the La-Ce systematics is used as a geochemical tracer or in geochronology, β-decay constant of 138La is a very important factor. However, the decay constant is still in controversy so that age dating results using the La-Ce isotope systematics are less convinced compared with those of Sm-Nd and Rb-Sr systematics.<br>In this paper, precise measurements of cerium isotope ratios and geochronological applications are reviewed and their problems are pointed out.

    DOI: 10.5702/massspec.38.165

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Books

  • Introductory Astrochemistry From Inorganic to Life-Related Materials

    Akio Makishima( Role: Sole author ,  All)

    Elsevier  2024  ( ISBN:9780443239380

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  • Introduction to planetary materials sciences: Meteorites, sample returns and extraterrestrial lives

    Akio Makishima( Role: Sole author ,  All)

    2020.7  ( ISBN:9784254150223

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    Total pages:171   Responsible for pages:171   Language:Japanese Book type:Scholarly book

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  • Biochemistry for materials science : catalysts, complexes and proteins Reviewed

    Akio Makishima( Role: Sole author ,  All)

    Elsevier  2019  ( ISBN:0128170549

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    Total pages:329   Responsible for pages:329   Language:English Book type:Scholarly book

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  • Recent topics in advanced materials science Reviewed

    Akio Makishima( Role: Sole author ,  All)

    Cambridge Scholars Publishing  2019  ( ISBN:9781527540293

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    Total pages:510   Responsible for pages:510   Language:English Book type:Scholarly book

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  • Thermal Ionization Mass Spectrometry (TIMS), Silicate Digestion, Separation, Measurement Reviewed

    Akio Makishima( Role: Sole author ,  All)

    Wiley-VCH  2016  ( ISBN:9783527340248

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    Total pages:348   Responsible for pages:348   Language:English Book type:Scholarly book

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  • Origins of the Earth, Moon and Life: a Multidisciplinary Approach. Reviewed

    Akio Makishima( Role: Sole author ,  All)

    Elsevier  2017  ( ISBN:9780128120583

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    Total pages:255   Responsible for pages:255   Language:English Book type:Scholarly book

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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

  • 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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  • Improvement of mass spectrometer performance for Sr, Nd, Ce and Pb isotope analyses by modification of preamplifiers.

    Makishima,A, Ishikawa,T, Shibata,T, Yoshikawa,M, Nakamura,E

    Technical Report of ISEI (Institute for Study of the Earth's Interior), Okayama University, Ser.B.   11   1 - 18   1993

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  • Investigation of the bias in a secondary electron multiplier of Finnigann-MAT 261 mass spectrometer for the quantitative analysis of rare-earth elements in rock samples

    Makishima,A, Nakamura,E, Akimoto,S

    ISEI Report, Ser. B   10   1 - 19   1991

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  • Determination of Ta at ng g^<-1> levels in silicate samples with Zr, Nb and Hf

    LU Yinghuai, MAKISHIMA Akio, NAKAMURA Eizo

    2004   236 - 236   2004.9

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  • 島弧玄武岩の負のセリウム異常の謎 Invited

    牧嶋昭夫

    化学と工業   43   1917 - 1918   1990

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Industrial property rights

  • A method for removing trace elements in titanium

    Akio Makishima, Takuya Moriguti, Eizo Nakamura

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    Applicant:Okayama University

    Application no:特願2008-105383  Date applied:2008.4.15

    Announcement no:特開2009-256708  Date announced:2009.11.5

    Patent/Registration no:特許5327837  Date registered:2013.8.2 

    Rights holder:Okayama University

    5327837

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  • Pressure vessel and pre-treatment of elemental analysis

    Akio Makishima, Eizo Nakamura

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    Applicant:Okayama University

    Application no:特願2007-14088  Date applied:2007.1.24

    Announcement no:特開2005-233895  Date announced:2005.9.2

    Patent/Registration no:特許3843324  Date registered:2006.8.25 

    Rights holder:Okayama University

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  • Pre-concentration for trace element analysis

    Akio Makishima, Eizo Nakamura

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    Applicant:Okayama University

    Application no:特願2007-14088  Date applied:2007.1.24

    Announcement no:特開2008-180594  Date announced:2008.8.7

    Patent/Registration no:特許4362595  Date registered:2009.8.28 

    Rights holder:Okayama University

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  • Amethod for trace element analysis with suppression of coprecipitation with fluorides

    Ryoji Tanaka, Hiroshi Kitagawa, Akio Makishima, Eizo Nakamura

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    Applicant:Okayama University

    Application no:特願2003-204828  Date applied:2003.7.31

    Announcement no:特開2005-49170  Date announced:2005.2.24

    Patent/Registration no:特許3755039  Date registered:2006.1.6 

    Rights holder:Okayama University

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Awards

  • Outstanding Reviewer for Journal of Analytical Atomic Spectrometry, 2023

    2024.3   Royal Society of Chemistry  

    Akio Makishima

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  • Outstanding Reviewer for Journal of Analytical Atomic Spectrometry, 2022

    2023.3   Royal Society of Chemistry  

    Akio Makishima

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  • Outstanding Reviewer for Journal of Analytical Atomic Spectrometry, 2020

    2021.1   Royal Society of Chemistry  

    Akio Makishima

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  • 日本地球化学会・奨励賞

    1994  

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Research Projects

  • HFS元素のp核種同位体比異常に関する研究

    Grant number:16K05609  2016.04 - 2019.03

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    牧嶋 昭夫

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    Grant amount:\2210000 ( Direct expense: \1700000 、 Indirect expense:\510000 )

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  • Establishment of high-accuracy dating method of tiny zircon (<10μm) : Implication for age determination of the oldest rock on the Earth

    Grant number:15340192  2003 - 2005

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    NAKAMURA Eizo, MAKISHIMA Akio, MORIGUTI Takuya, KOBAYASHI Katsura

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    Grant amount:\16300000 ( Direct expense: \16300000 )

    In-situ age dating of zircon provides us the important information to understand complicated geological events, and the purpose of this research is to improve the new age dating method using high mass resolution ion probe, Cameca ims-1270. One of the key devices to establish this research project was high-spatial resolution optical microscope for the Camaca ion probe. The authors developed the new optical microscope system (PMLOpt-1) jointly with OLIMPUS Co.Ltd, and installed the system in our ion probe system. As a result, the expected optical resolution, less than 4μm, has been established, on in-situ observation by ion probe analysis. The obtained special resolution by this system is comparable with that by SEM-EDX and CL analysis. Combining observation by the newly installed optical microscope and "Visual Stage" system, which is database system handling the target's coordinates on the sample mount, we could very precise age data based on the detail description of sample. The authors also had been developed the precise in-situ age dating method using the reliable zircon standards, which had been confirmed by the conventional TIMS technique. These high-quality zircon standards confirm the accuracy of age data by the ion probe analysis. The authors applied the developed technique for the zircon mainly from metamorphic rock suites. Typical grain size of zircon in metamorphic rock is less than several tens micrometer, therefore, the high-spatial resolution dating, we developed, is essential. Analytical results with other geochemical discussions are published and/or preparing for the publication.

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  • Study for distribution and behavior of siderophile and chalcophile elements in the mantle.

    Grant number:15340188  2003 - 2005

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    MAKISHIMA Akio, NAKAMURA Eizo, KOBAYASHI Katsura

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    Grant amount:\9500000 ( Direct expense: \9500000 )

    We have studied for distribution and behavior siderophile and chalcophle elements in the mantle. For this purpose, we have developed : (1)new analytical methods for determination of platinum group elements (PGEs) ; (2)the new analytical methods for siderophile, chalcophile and lithophile elements except for PGEs ; (3)the new analytical method for precise determination of Re and Os isotope ratios for application to Re-Os isotope systematics.
    We first developed the new sample digestion method for determination of PGEs. In this study, we have designed an utterly new digestion vessel, which is cheap, simple and applicable up to 300C. We have proposed the patent. If this patent is accepted, this will be used all over the world, although the patent was just proposed in Japan, because of the lack of money. There was a reply from the Japanese Patent Office, and we replied and modified the patent.
    We also developed the new determination method for Bi,Tl,In,Li,Be,Rb,Sr,Y,Cs,Ba,La,Ce,Pr,Nd,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Pb,Th and U using Q-pole type ICP-MS (ICP-QMS). We developed isotope-dilution internal standardization method (ID-IS). In this method, when the sample is digested with Sm spike, then, the elemental analysis is performed without knowing the exact dilution factor. We developed pseudo-FI method, in which only 0.1mL of sample solution is required for determination of these elements. Furthermore, we developed the determination method for Na,Mg,Al,P,Ca,V,Mn,Fe,Co,K,Sc,Ni,Cu,Zn and Ga using the same sample solution by sector type ICP-MS (ICP-SFMS). These methods are submitted to Geostandards and Geoanalytical Research. In addition, precise determination methods for B,Ti,Zr,Nb,Mo,Sn,Sb,Hf and Ta using ID-IS and pseudo-FI methods by ICP-QMS and ICP-SFMS were developed and submitted.
    We also developed new analytical methods for Re and Os isotope analysis using multiple collector ICP-MS (MC-ICP-MS). In this study, Os and Re of <1pg can be measured precisely, which can only be achieved by N-TIMS. This study has been accepted Analytical Chemistry (in press).
    Unfortunately, the development of analytical technique required far longer time than we had expected, thus the analysis of mantle samples are in future. Although, we have developed analytical methods, application will not take long time to accomplish.

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  • 負イオン表面電離型質量分析法によるハフニウム同位体比の高精度測定法の開発と応用

    Grant number:15654076  2003 - 2004

    日本学術振興会  科学研究費助成事業  萌芽研究

    牧嶋 昭夫, 中村 栄三

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    Grant amount:\3100000 ( Direct expense: \3100000 )

    本年度は負イオン表面電離型質量分析法によるハフニウム同位体比の高精度測定法の開発と応用の第2年度として、ハフニウム負イオンを生成する条件の検討を行なった。フィラメントに白金を用い、100ngのHfを塗布し、イオン化のアクチベーターとしてバリウム、ランタン、トリウムと硝酸銀を塗布し、フッ化水素酸を最後に塗布してビームを出した。その結果、ハフニウムフッ化物イオンをファラデー検出器で、数ミリボルト1分維持することに成功した。
    また、試料をフッ化水素酸で分解し、四重極型ICPMSを用いる、B-Zr-Hf-Nb-Ta-Sn-Sb-Mo-Wの同時定量法を確立した。
    さらに、この定量用の溶液から、ハフニウムを分離する方法の開発をおこなった。陰イオン交換樹脂AG1X8でチタン・ジルコニウム・ハフニウムに分離し、さらに、U/TEVAという樹脂を用いることによりチタンとジルコニウムを分離することに成功した。この方法により、ハフニウムを80mgの玄武岩試料から回収率87%、ブランク3pg以下で回収することができた。
    さらに、スパイクされた試料に対して、マルチコレクターICP-MSを用いたハフニウム高精度同位体比測定法を開発し、上記の方法で実際の岩石試料からハフニウムを分離し、同位体比を測定する方法を確立した。
    別に、ハフニウムのフッ化錯イオンは樹脂に吸着しにくいために、あらたに、フッ化水素酸なしで、王水で試料を分解することを検討した。この目的のために容器これをデザインし、特許申請をおこなった。
    また、イオン交換樹脂を用いる元素の抽出に関しても新しい方法をデザインし、岡山大学に発明届を提出した。

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  • Development of age determination method using U-Th isotope disequilibrium for the prediction of volcanic eruption

    Grant number:11554021  1999 - 2001

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    NAKAMURA Eizo, MORIGUTI Takuya, MAKISHIMA Akio

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    Grant amount:\11700000 ( Direct expense: \11700000 )

    In order to estimate the time scale of magma processes beneath island arc, we have developed new chimerical separation methods and highly precise isotope analyses for U, Th and Ra. These techniques were first applied to lavas from Miyakejima Island together with comprehensive petrological and geochemical investigations using major and trace element compositions and B-Sr-Nd-Pb isotopic compositions. The inferred genesis and transportation mechanism of magma with subduction component derived from descending slab in the wedge mantle beneath Miyakejima is summarized as follows:
    ^<238>U-^<230>Th disequilibrium observed in Miyakejima lavas with large 238U excess implies metasomatism of depleted mantle by fluid-related processes, as also suggested by the trace element and B-Sr-Nd-Pb isotope systematics. In the equiline diagram, trends observed in Stages 1 and 2 indicate two different isochrones with common initial ^<230>Th/^<232>Th ratios. The interval of individual fluid-release is obtained as 15 kyr between Stages 1 and 2, and 3 kyr between Stages 2 and 3. ^<226>Ra-^<230>Th disequilibrium observed in some lavas suggests that the minimum interval of the fluid-release is approximately 1 kyr, indicating that the fluid-release and subsequent melt generation in the wedge mantle are episodic events intermittently occurring within 1-15 kyr. The ^<226>Ra-^<230>Th disequilibrium constraints the ascending rate of slab components as >45 m/yr, leading to the existence of crack in the wedge mantle. In contrast, Stages 3 and 4 samples depict a mixing trend in the equiline diagram between old andesitic magma and newly injected primitive magma. The involvement of primitive magma generally decreases from Stage 3 towards present, implying that primitive magma system is nearly closed system. Residence time of the differentiated magma in the crust is approximately 10 kyr, which is factor of two longer than theoretically obtained result. This may be due to the continuous heat supply from neighboring magma injection.

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  • 沈み込み帯における元素の挙動に関する実験的・実証的研究

    Grant number:08740416  1996

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    牧嶋 昭夫

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    Grant amount:\1000000 ( Direct expense: \1000000 )

    本研究では,3GPa-850℃から,8GPa-850℃の範囲で,金カプセルのなかにスラブ相当物質と,マントル相当物質(カンラン石)を封入し,高圧・高温にして,スラブ相当物質を脱水させた.その後,金カプセルを取り出し,外側を洗浄した後,清浄なピンセットでカプセルを破き,スラブ相当物質とマントル相当物質をそれぞれ別々に取り出した.一回の実験で,マントル相当物質約3mgと,スラブ相当物質約6mgが得られた.
    ICP質量分析計(ICP-MS)により,この中の希土類元素,Li,Sr,Rb,Y,Cs,Ba,U,Th,Pbを定量した.実験後のマントル相当物質は,出発物質のスラブ相当物質とマントル相当物質の単純なミキシングとは全く異なる微量元素組成を持つことを見いだした.また,この組成は,カンラン石だけを封入した実験生成物(ブランク実験生成物)の分析結果とも異なっていた。すなわち,スラブ物質は,脱水反応と共に,Cs,Rb,Ba,PbやLREE(La,Ce)が枯渇した。またHREE(Er,Tm,Yb,Lu,Y等)は全く変化しなかった。
    この結果は,沈み込むスラブが,脱水反応によって,より低いLREE/HREE,及び,高いU/Pb比を有することを意味する。これは,沈み込んだスラブが,マントル内に導入された後,海洋島玄武岩の一部であるHIMUマグマの起源物質(海洋島玄武岩や中央海嶺玄武岩のマグマソース全体が示す鉛同位体比の一般的傾向よりも高いU/Pb【μ】を長時間保持していたと考えられるマグマソース)になりうることを示す。
    また,スラブから放出される流体相は、アルカリ金属元素,Pb及びLREEに富み、Y及びHREEに枯渇する特徴を持っていることも意味する。さらに,SIMSによる鉱物の分析の結果から,スラブ側に晶出した garnet は,出発物質に比べHREEに富んでいることも明らかとなった。これらの結果は,スラブ側のHREEはスラブ物質の脱水作用によって晶出する garnet へ分配され,そのために放出される流体相の科学組成が,LREEに富みHREEに枯渇したことを示す。これはすなわち,スラブから放出される流体相の化学組成は,流体とスラブ中の鉱物の間の分配係数に支配されていることを意味している。

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  • 沈み込み帯における希土類元素の挙動の解明

    Grant number:06854025  1994

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    牧嶋 昭夫

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    Grant amount:\1100000 ( Direct expense: \1100000 )

    私は、沈み込み帯での希土類元素の挙動を解明するために、沈み込み帯の火成活動の結果生じた島弧を代表すると考えられる東北日本の岩石試料(岩手山、船形山、蔵王山、駒ヶ岳、森吉山、寒風山、利尻島)のCe同位体比を測定した。
    また、これらの試料中のインコンパチブル元素(固相よりも液相に移動しやすいウラン、トリウム、リチウム、セシウム、ニオブ、タンタル、バリウム、ジルコニウム、ハフニウム、ベリリウム)を、岡山大学・地球内部研究センターに導入されているICP質量分析計を用いて定量する方法を実用化した。この方法は世界トップレベルの感度を持ちながら、必要試料量が数mgという、極めて少ない試料でも測定が可能であるという特徴を有している。現在、これらの元素の分析をこれらの試料に関して行っているところである。
    さらに、沈み込み帯での希土類元素の挙動を解明する上で、重要な端成分である中央海嶺玄武岩(MORB)の、Ce同位体比によるキャラクタリゼーションをおこなった。その結果、MORBは太平洋・大西洋ともほぼ均一な同位体組成を持ち、その平均は、ε Ce=1.4という値を持っていた。この値は、沈み込み帯での希土類元素の挙動のモデルを作る上で必要不可欠な、重要な値であり、今後世界的にこの値が推奨値として用いられるに違いない。

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  • magma in the Earth's history

    Grant number:05231103  1993 - 1995

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Priority Areas

    OHTANI Eiji, SASAKI Sho, MARUYAMA Shigenori, KANEOKA Ichiro, MAKISHIMA Akio, YURIMOTO Hisayoshi

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    Grant amount:\169000000 ( Direct expense: \169000000 )

    In this project we studied the following three topics ; the nature of the magma ocean in the earliest stage of the terrestrial evolution ; the formation of the crust and evolution of the mantle ; the heterogeneity and material circulation in the earth's interior.
    We have conducted the melting experiments of the silicate systems such as Mg2SiO4-Fe2SiO4, and MgO-Al2O3-SiO2 systems, and discuss the composition of the magma ocean and the origin of komatiite magmas which were generated in the Archean. We made the high pressure metal-silicate melt partitioning experiments of the siderophile elements such as Co and Ni, and clarified that mantle abundances of these elements can be accounted for by the core-mantle equilibrium in the deep magma ocean with the depth corresponding to the lower mantle.
    We made detailed geological survey of geological bodies in the Archean in the world such as Isua in Greenland, and Pilvara of Australia. We also conducted the chemical analysis of the various rocks in these areas. On the basis of these data, we could obtain evidence of plate tectonics in the Archean, and discussed the origin of komatiite magmas as a kind of ocean island magmatism. We also obtain evidence for FeO rich upper mantle as a source of Archean MORBs.
    We determined the density of ultramafic magmas using sink-float test experiment of diamond. Density crossover between diamond and the magma locates at around 15-20 GPa. Our density measurement of the melt implies that the density crossover between magma and olivine does not occur for the most part of the upper mantle, on the contrary to the previous estimation. We synthesized a new hydrous phase, phase G,which is a very important candidate of a carrier of water for circulation into the whole mantle.

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  • Geomagnetism and magnatic evolution from Iceladic Volcanics

    Grant number:05041059  1993 - 1994

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for international Scientific Research

    KONO Masaru, KRISTJANSSON Leo, MAKISHIMA Akio, KOYAGUCHI Takahiro, TANAKA Hidefumi

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    Grant amount:\9500000 ( Direct expense: \9500000 )

    Field works were performed in Iceland during July 1993 and July 1994. Major effort was directed to the collection of paleomagnetic samples from successive lava flows with ages of Pliocene and Pleistocene. Samples were also collected from historic and prehistoric acidic lava flows for geochemical studies. Experiments using paleomagnetic as well as geochemical samples are under progress in Department of Geophysics and Planetary Physics (DEPP) and Earthquake Research Institute (ERI), University of Tokyo, Department of Earth and Planetary Sciences, Tokyo Institute of Technology, and Institute for Study of Earth's Interior (ISEI). Following is a brief description of various research activities.
    1.Paleomagnetism of successive lava flows.
    About 250 lava flows were sampled in each year. Five cores were drilled and orientation was measured in terms of directions of sun, reference, or magnetic directions. For a small number of samples, measurement of natural remanent magnetization was carried out in the field using spinner magnetometer and alternating field demagnetizer.
    2.K-Ar dating.
    About 50 samples from Storutjarnir section are now dated by K-Ar method. Potassuim is measurementry flame photometry at ERI,while Argon isotope ratios are measured by mass spectrometer at ISEI.
    3.Paleointensities.
    Paleointensity of the earth's magnetic field was studied using Icelandic samples by Thellier's method. Result from Western Iceland indicates that the intensity low at the time of polarity reversal continues sometime after the reversal of direction was completed.
    4.Secular variation data.
    With the use of Icelandic data as well as data from other areas worldwide, paleosecular variation (PSV) of the geomagnetic field was studied. A paleointensity database was set up through the compilation of published data, and models of PSV were developed in terms of the randomly varying Gauss coefficients.

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  • 中央海嶺玄武岩の新しい同位体地球化学的キャラクタリゼーション

    Grant number:05854044  1993

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    牧嶋 昭夫

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    Grant amount:\900000 ( Direct expense: \900000 )

    本研究では、太平洋からのN-type MORB試料としてDSDP Hole 420,421,429A,504B,597Bの玄武岩を、また、大西洋からのN-type MORB試料としてHole 395,519,522,562,564の玄武岩のCe・Sr・Nd同位体比を測定し、また、希土類元素を表面電離型質量分析計を用いた同位体希釈法で定量した。
    その結果、次のようなことが明らかとなった。
    1.N-type MORBのセリウム同位体比は、0.0225616から0.0225633という間に入った。これは、epsilonCeで-1.6から-1.0の範囲に相当する。さらに、太平洋と大西洋との間で系統的な差は認められなかった。これは、Tanaka et al.(Nature,333,403-404,1988)によって出されていた、-3.4というMORBの値は例外的なものであることを意味している。また、本研究で得られた平均値、epsilonCe=-1.4が、代表的なMORBのセリウム同位体比であると考えられる。今後、MORBのセリウム同位体比を用いてモデル計算をする場合には、この値を用いるべきである。また、ようやくセリクム同位体比をトレーサーとして用いる基礎ができたともいえる。
    2.用いた試料の多くは、なるべく新鮮な試料を用いたにも関わらず負のセリウム異常を示した。これは、変質した海洋底玄武岩には、従来考えられているよりもはるかに普遍的に負のセリウム異常が存在していることを意味している。そのため、変質した玄武岩の負のセリウム異常が島弧火成岩の負のセリウム異常の一因となっているという仮説は、かなり信憑性が高いと考えられ、今後、セリウム同位体比と組み合わせた研究によって、島弧での物質移動の研究が飛躍的に進歩すると期待される。

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  • Genesis of Primitive Crust at the Early History of the Earth

    Grant number:02044100  1990

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for international Scientific Research

    AKIMOTO Shunーiti, MAKISHIMA Akio, NAKAMURA Eizo, KAGAMI Hiroo, CAMPBELL Ian, HILL Robert

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    Grant amount:\4300000 ( Direct expense: \4300000 )

    The goal of the project is to develop a better understanding of the origin and evolution of the Earth's primitive crust.
    Samples of granitic, basaltic and sedimentary rock were collected in the field in Western Australia by the Japanese scientists from the Institute for the Study of the Earth's Interior (ISEI) in collaboration with colleagues from the Research School of Earth Sciences of the Australian National University (RSES) who had already determined ages of 2,700,000,000 years for a variety of rock types from this area.
    Aliquots from each sample were returned to ISEI and RSES for further study. A variety of minerals (plagioclase, alkali feldspar, hornblende, biotite, zircon, apatite, titanite and epidote) were separated from three granite samples at RSES for age determinations by the U-Pb method at RSES, and by the Sm-Nd and La-Ce methods at ISEI, and for determination of the partitioning of the rare earth elements (REE) between the different minerals (at ISEI). These samples cover the two major granitic rock types previously recognized by RSES studies in this area. Ages have been obtained for all three samples using the SHRIMP ion microprobe at RSES, and the Sm-Nd and La-Ce analyses of both rocks and minerals have been completed at ISEI. The ages of rare inherited zircons have also been determined at RSES with the SHRIMP ion microprobe.
    Dr Ian Campbell and Dr Robert Hill visited ISEI in March to review the progress of the work to date and to plan the direction of future studies. One exciting outcome of this visit has been the planning of a project to use the SHRIMP ion microprobe to investigate an apparent contradiction in REE partitioning established by the high-precision isotope diluti on mass spectrometric analyses now completed at ISEI. This new project has resulted from the complementarity of the analytical facilities at the two co-operating institutions. This complementarity, and the success of the current project, will serve as the basis for future collaboration between the two institutions.

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  • 沈み込み帯での脱水作用におけるスラブ物質内の含水鉱物消長の実験的研究

    Grant number:24K07174  2024.04 - 2027.03

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    森口 拓弥, 石井 貴之, 辻森 樹, 牧嶋 昭夫

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    Grant amount:\4680000 ( Direct expense: \3600000 、 Indirect expense:\1080000 )

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  • Elucidation of the dynamic magma system by precise time-scale evaluation

    Grant number:23340160  2011.04 - 2014.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    NAKAMURA Eizo, MAKISHIMA Akio, TANAKA Ryouji, KOBAYASHI Katsura

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    Grant amount:\19760000 ( Direct expense: \15200000 、 Indirect expense:\4560000 )

    In order to understand the dynamic magma system of volcanoes, we attempted to develop new age dating methods then applied them to natural volcanic ejecta. Consequently, we established new U-Th-Ra disequilibrium dating method by using multi collection ICP-MS, and determined the duration of magma supply sequences of Fuji volcano. Additionally, we examined new K-Ar dating combining the spiked and the unspiked sensitivity method to determine eruption ages less than 0.1 Myrs. This method could be successfully applied for lavas from Bratan volcano in Indonesia. The dynamic eruption model regarding supervolcan eruptions driven by melt buoyancy was established.

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  • Study of mantle evolution and development of Hf isotope analysis at ng/g levels

    Grant number:19340162  2007 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    MAKISHIMA Akio

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    Grant amount:\14950000 ( Direct expense: \11500000 、 Indirect expense:\3450000 )

    We analyzed the origin and evolution of the Horoman peridotite massif based on major and trace elements and Hf-Nd-Pb-Sr isotope systematics. We identified at least four events in the evolution of the Horoman peridotite. In addition, we found the least radiogenic lead from the Horoman peridotite so far. Furthermore, we have developed the Hf isotope analytical method at ng/g levels.

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  • 海洋底堆積物の同位体地球化学的キャラクタリゼーション

    Grant number:07854029  1995

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    牧嶋 昭夫

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    Grant amount:\900000 ( Direct expense: \900000 )

    太平洋の全般にわたるさまざま場所のさまざまな種類の海洋底堆積物(遠洋性粘土,石灰質堆積物,珪藻軟泥,近海性堆積物),及び,これらが続成作用によって固結した四万十帯の頁岩などの,全希土類元素,及び,Sr,U,Th,Pb,Cs,Ta,Ba,Zr,Hf,Beの濃度を,岡山大学・固体地球研究センターのICP-MSを用いて測定した.また,同センターの表面電離型質量分析計を用いて,試料のCe・Nd同位体比を測定した.さらに,ICP-MSを用いた,海洋底堆積物中の,Na,Mg,Al,K,Ca,Sc,Mn,Fe,Co,Ni,Cu,Zn,W,Mo,Sn,Sb,Cd,Tlの濃度測定法を確立した.この方法では,正確さ・再現性,どちらも10%程度で分析が可能となっている.
    海洋底堆積物の微量元素濃度の測定結果から,次のようなことが明らかとなった.(1)Ceを除く希土類元素は相互に相関が高く,また,Caと相関があった.(2)海洋底堆積物にはCe異常があったりなかったりであったが,CeはRb,U,Th,Al,B,Csと相関が見られ,Mnとは無相関であった.これらのことは,Ce濃度は,粘土鉱物などの,大陸起源物質に由来し,これと,海水起源である炭酸塩が混合し,海洋底堆積物の希土類元素パターンを形作ることを意味している.さらに,Ce・Nd同位体比の測定結果と併せると,大陸起源物質(風成塵)は,海水に落ちるとすぐにCe,Ndを海水と同位体交換をすることがあきらかとなった.

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