Updated on 2022/10/01

写真a

 
Hiroshi Kitagawa
 
Organization
Institute for Planetary Materials Assistant Professor
Position
Assistant Professor
Contact information
メールアドレス
External link

Degree

  • Ph.D ( Okayama University )

Research Interests

  • geochemistry

  • volcano

  • petrology

Research Areas

  • Natural Science / Solid earth sciences

Education

  • Okayama University   大学院自然科学研究科  

    2002.4 - 2006.3

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    Country: Japan

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  • University of the Ryukyus   理工学研究科   物質科学専攻

    2000.4 - 2002.3

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    Country: Japan

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  • University of the Ryukyus   理学部   物質地球科学科地学系

    1996.4 - 2000.3

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    Country: Japan

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Research History

  • Institute for Planetary Materials, Okayama University

    2015.2

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  • Institute for Study of the Earth's Interior, Okayama University at Misasa

    2008.4 - 2015.1

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  • Institute for Study of the Earth's Interior, Okayama University at Misasa

    2006.4 - 2008.3

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    Country:Japan

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Professional Memberships

 

Papers

  • Feedback of Slab Distortion on Volcanic Arc Evolution: Geochemical Perspective From Late Cenozoic Volcanism in SW Japan Reviewed

    Tai Truong Nguyen, Hiroshi Kitagawa, Ivan Pineda‐Velasco, Eizo Nakamura

    Journal of Geophysical Research: Solid Earth   125 ( 10 )   2020.10

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    DOI: 10.1029/2019jb019143

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2019JB019143

  • Origin of ocean island basalts in the West African passive margin without mantle plume involvement Reviewed

    Belay, I-G, Tanaka, R, Kitagawa, H, Kobayashi, K, Nakamura, E

    Nature Communications   10 ( 3022 )   2019

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

    DOI: 10.1038/s41467-019-10832-7

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  • Transition from Plume-driven to Plate-driven Magmatism in the Evolution of the Main Ethiopian Rift Reviewed

    Feyissa, D.H, Kitagawa, H, Bizuneh, T.D, Tanaka, R, Kabeto, K, Nakamura, E

    Journal of Petrology   60 ( 8 )   1681 - 1715   2019

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

    <jats:title>Abstract</jats:title>
    <jats:p>New K–Ar ages, major and trace element concentrations, and Sr–Nd–Pb isotope data are presented for Oligocene to recent mafic volcanic rocks from the Ethiopian Plateau, the Main Ethiopian Rift (MER), and the Afar depression. Chronological and geochemical data from this study are combined with previously published datasets to reveal secular variations in magmatism throughout the entire Ethiopian volcanic region. The mafic lavas in these regions show variability in terms of silica-saturation (i.e. alkaline and sub-alkaline series) and extent of differentiation (mafic through intermediate to felsic). The P–T conditions of melting, estimated using the least differentiated basalts, reveal a secular decrease in the mantle potential temperature, from when the flood basalt magmas erupted (up to 1600 °C) to the time of the rift-related magmatism (&amp;lt;1500°C). Variations in the Sr–Nd–Pb isotopic compositions of the mafic lavas can account for the involvement of multiple end-member components. The relative contributions of these end-member components vary in space and time owing to changes in the thermal condition of the asthenosphere and the thickness of the lithosphere. The evolution of the Ethiopian rift is caused by a transition from plume-driven to plate-driven mantle upwelling, although the present-day mantle beneath the MER and the Afar depression is still warmer than normal asthenosphere.</jats:p>

    DOI: 10.1093/petrology/egz043

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  • Determination of abundances of fifty-two elements in natural waters by ICP-MS with freeze-drying pre-concentration, Reviewed

    Hoang, Q. D, Kunihiro, T, Sakaguchi, C, Yamanaka, M, Kitagawa, H, Nakamura, E

    Geostandards and Geoanalytical Research   43 ( 1 )   147 - 161   2019

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

    To precisely determine the abundances of fifty-two elements found within natural water samples, with mass fractions down to fg g(-1) level, we have developed a method which combines freeze-drying pre-concentration (FDC) and isotope dilution internal standardisation (ID-IS). By sublimation of H2O, the sample solution was reduced to < 1/50 of the original volume. To determine element abundance with accuracy better than 10%, we found that for solutions being analysed by mass spectrometry the HNO3 concentration should be > 0.3 mol l(-1) to avoid hydrolysis. Matrix-affected signal suppression was not significant for the solutions with NaCl concentrations lower than 0.2 and 0.1 cg g(-1) for quadrupole ICP-MS and sector field ICP-MS, respectively. The recovery yields of elements after FDC were 97-105%. The detection limits for the sample solutions prepared by FDC were <= 10 pg g(-1), except for Na, K and Ca. Blanks prepared using FDC were at pg-levels, except for eleven elements (Na, Mg, Al, P, Ca, Mn, Fe, Co, Ni, Cu and Zn). The abundances of fifty-two elements in bottled drinking water were determined from five different geological sources with mass fractions ranging from the fg g(-1) to mu g g(-1) level with high accuracy.

    DOI: 10.1111/ggr.12245

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  • Production of High-Sr Andesite and Dacite Magmas by Melting of Subducting Oceanic Lithosphere at Propagating Slab Tears Reviewed

    I. Pineda-Velasco, H. Kitagawa, T. T. Nguyen, K. Kobayashi, E. Nakamura

    Journal of Geophysical Research: Solid Earth   123 ( 5 )   3698 - 3728   2018.5

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

    We present K-Ar ages, major and trace element concentrations, and Sr-Nd-Pb isotope data for late Cenozoic volcanic rocks from the Chugoku district, southwest Japan arc. Andesite and dacite lavas in this region are enriched in Sr (mostly &gt
    800 μg g−1) and show geochemical characteristics of volcanic rocks commonly referred to as “adakite.” K-Ar dating of these lavas revealed that the eruption of high-Sr andesitic to dacitic magmas occurred during the last 2 Myr, following or concurrent with the eruption of basalt in adjacent regions. Trace-element characteristics of high-Sr andesites and dacites are consistent with the formation of their parent magmas by partial melting of the basaltic layer of the subducting Shikoku Basin Plate. Mass balance modeling of trace element concentrations and isotopic compositions suggests that the parental magmas of high-Sr andesites and dacites are best explained by mixing of partial melts from oceanic crust (F = 5–15%) and sediment (F = 30%) at 80:20 to 55:45 ratios. Spatial coincidence of the occurrences of high-Sr andesites and dacites and seismic gaps of the subducting slab demonstrates the causal link between slab melting and mantle upwelling at slab tears. We speculate that these tears could have been formed by subduction of ridges on the plate. A warm mantle upwelled through tears, preventing the solidification of the siliceous slab melts in the mantle and facilitating the transportation of these melts to the surface.

    DOI: 10.1029/2017JB015066

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  • Multiple Pulses of the Mantle Plume: Evidence from Tertiary Icelandic Lavas Reviewed

    H. Kitagawa, K. Kobayashi, A. Makishima, E. Nakamura

    Journal of Petrology   49 ( 7 )   1365 - 1396   2008.5

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    DOI: 10.1093/petrology/egn029

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  • On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective Reviewed

    Eizo NAKAMURA, Katsura KOBAYASHI, Ryoji TANAKA, Tak KUNIHIRO, Hiroshi KITAGAWA, Christian POTISZIL, Tsutomu OTA, Chie SAKAGUCHI, Masahiro YAMANAKA, Dilan M. RATNAYAKE, Havishk TRIPATHI, Rahul KUMAR, Maya-Liliana AVRAMESCU, Hidehisa TSUCHIDA, Yusuke YACHI, Hitoshi MIURA, Masanao ABE, Ryota FUKAI, Shizuho FURUYA, Kentaro HATAKEDA, Tasuku HAYASHI, Yuya HITOMI, Kazuya KUMAGAI, Akiko MIYAZAKI, Aiko NAKATO, Masahiro NISHIMURA, Tatsuaki OKADA, Hiromichi SOEJIMA, Seiji SUGITA, Ayako SUZUKI, Tomohiro USUI, Toru YADA, Daiki YAMAMOTO, Kasumi YOGATA, Miwa YOSHITAKE, Masahiko ARAKAWA, Atsushi FUJII, Masahiko HAYAKAWA, Naoyuki HIRATA, Naru HIRATA, Rie HONDA, Chikatoshi HONDA, Satoshi HOSODA, Yu-ichi IIJIMA, Hitoshi IKEDA, Masateru ISHIGURO, Yoshiaki ISHIHARA, Takahiro IWATA, Kosuke KAWAHARA, Shota KIKUCHI, Kohei KITAZATO, Koji MATSUMOTO, Moe MATSUOKA, Tatsuhiro MICHIKAMI, Yuya MIMASU, Akira MIURA, Tomokatsu MOROTA, Satoru NAKAZAWA, Noriyuki NAMIKI, Hirotomo NODA, Rina NOGUCHI, Naoko OGAWA, Kazunori OGAWA, Chisato OKAMOTO, Go ONO, Masanobu OZAKI, Takanao SAIKI, Naoya SAKATANI, Hirotaka SAWADA, Hiroki SENSHU, Yuri SHIMAKI, Kei SHIRAI, Yuto TAKEI, Hiroshi TAKEUCHI, Satoshi TANAKA, Eri TATSUMI, Fuyuto TERUI, Ryudo TSUKIZAKI, Koji WADA, Manabu YAMADA, Tetsuya YAMADA, Yukio YAMAMOTO, Hajime YANO, Yasuhiro YOKOTA, Keisuke YOSHIHARA, Makoto YOSHIKAWA, Kent YOSHIKAWA, Masaki FUJIMOTO, Sei-ichiro WATANABE, Yuichi TSUDA

    Proceedings of the Japan Academy, Series B   98 ( 6 )   227 - 282   2022.6

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    Publishing type:Research paper (scientific journal)   Publisher:Japan Academy  

    DOI: 10.2183/pjab.98.015

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  • Bilateral Heterogeneity in an Upwelling Mantle via Double Subduction of Oceanic Lithosphere Reviewed

    Nghiem Van Dao, Hiroshi Kitagawa, Eizo Nakamura, Katsura Kobayashi, Thanh Xuan Ngo, Son Hai Trinh

    Journal of Geophysical Research: Solid Earth   127 ( 5 )   2022.5

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    Authorship:Corresponding author   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union ({AGU})  

    DOI: 10.1029/2021JB023328

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  • Various Ages of Recycled Material in the Source of Cenozoic Basalts in SE China: Implications for the Role of the Hainan Plume Reviewed

    Yan-Qing Li, Hiroshi Kitagawa, Eizo Nakamura, Changqian Ma, Xiangyun Hu, Katsura Kobayashi, Chie Sakaguchi

    Journal of Petrology   61 ( 6 )   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    <title>Abstract</title>
    Subduction processes introduce crustal materials into the mantle, and mantle plumes return them to the surface. However, when and how the subducted materials were recorded in the plume-related basalts remains unclear. Here we investigate geochronology, bulk-rock composition, and Sr–Nd–Pb isotopes of Cenozoic basalts from Southeast China, occurring near the west Pacific subduction zone and the seismically detected Hainan plume. Volcanism beginning in the late Oligocene in the continental margin of SE China consistently becomes younger landward. Together with a compilation of published results on the synchronous basalts from the South China Sea seamounts and the Indochina peninsula, the volcanoes close to the Pacific subduction zone exhibit more radiogenic Pb and Sr isotopes associated with less radiogenic Nd isotopes compared with those of the inland volcanoes. Such spatiotemporal variations in radiogenic isotopes imply oceanic crusts of different ages in the source, each corresponding to a different geographical volcanic belt. Major-element features such as low CaO, high TiO2 and high Fe/Mn ratios imply that pyroxenite/eclogite could serve as a source lithology of the SE China basalts. Specific trace-element signatures reveal the important roles of recycled oceanic crust along with surface sediment, which was inconsistently dehydrated during subduction. A geologically, geochemically, and geophysically plausible scenario is proposed to illustrate the time–space–source correlation of the late Cenozoic basaltic lavas in SE Asia. The Hainan plume delivered the ancient subducted crust (1·5 Ga) from the core–mantle boundary and, subsequently, the subducted Pacific plate crustal materials from the mantle transition zone to the shallow mantle as a result of mantle convection induced by continuous subduction of the Pacific plate. Such recycled materials of different ages contributed to the geographical compositional heterogeneities of the late Cenozoic basaltic lavas in SE Asia.

    DOI: 10.1093/petrology/egaa060

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    Other Link: http://academic.oup.com/petrology/article-pdf/61/6/egaa060/37165138/egaa060.pdf

  • Hypervelocity collision and water-rock interaction in space preserved in the Chelyabinsk ordinary chondrite Reviewed

    Eizo NAKAMURA, Tak KUNIHIRO, Tsutomu OTA, Chie SAKAGUCHI, Ryoji TANAKA, Hiroshi KITAGAWA, Katsura KOBAYASHI, Masahiro YAMANAKA, Yuri SHIMAKI, Gray E. BEBOUT, Hitoshi MIURA, Tetsuo YAMAMOTO, Vladimir MALKOVETS, Victor GROKHOVSKY, Olga KOROLEVA, Konstantin LITASOV

    Proceedings of the Japan Academy, Series B   95 ( 4 )   165 - 177   2019.4

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

    A comprehensive geochemical study of the Chelyabinsk meteorite reveals further details regarding its history of impact-related fragmentation and melting, and later aqueous alteration, during its transit toward Earth. We support an similar to 30 Ma age obtained by Ar-Ar method (Beard et al., 2014) for the impact-related melting, based on Rb-Sr isotope analyses of a melt domain. An irregularly shaped olivine with a distinct 0 isotope composition in a melt domain appears to be a fragment of a silicate-rich impactor. Hydrogen and Li concentrations and isotopic compositions, textures of Fe oxyhydroxides, and the presence of organic materials located in fractures, are together consistent with aqueous alteration, and this alteration could have pre-dated interaction with the Earth's atmosphere. As one model, we suggest that hypervelocity capture of the impact-related debris by a comet nucleus could have led to shock-wave-induced supercritical aqueous fluids dissolving the silicate, metallic, and organic matter, with later ice sublimation yielding a rocky rubble pile sampled by the meteorite.

    DOI: 10.2183/pjab.95.013

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  • Petrologic and geochemical characterization of rift-related magmatism at the northernmost Main Ethiopian Rift: Implications for plume-lithosphere interaction and the evolution of rift mantle sources

    D.H. Feyissa, R. Shinjo, H. Kitagawa, D. Meshesha, E. Nakamura

    Lithos   282-283   240 - 261   2017.6

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

    DOI: 10.1016/j.lithos.2017.03.011

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  • Comment on “Diverse magmatic effects of subducting a hot slab in SW Japan: Results from forward modeling” by J.‐I. Kimura et al. Reviewed

    Ivan Pineda‐Velasco, Tai T. Nguyen, Hiroshi Kitagawa, Eizo Nakamura

    Geochemistry, Geophysics, Geosystems   16 ( 9 )   2848 - 2852   2015.9

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    Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    DOI: 10.1002/2015gc005914

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015GC005914

  • Geochemical heterogeneities in magma beneath Mount Etna recorded by 2001-2006 melt inclusions Reviewed

    Federica Schiavi, Alberto Rosciglione, Hiroshi Kitagawa, Katsura Kobayashi, Eizo Nakamura, Pasquale Mario Nuccio, Luisa Ottolini, Antonio Paonita, Riccardo Vannucci

    Geochemistry, Geophysics, Geosystems   16 ( 7 )   2109 - 2126   2015.7

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    Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    DOI: 10.1002/2015gc005786

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  • Evaluation of the applicability of acid leaching for the 238U-230Th internal isochron method

    Tanaka, R., Yokoyama, T., Kitagawa, H., Tesfaye, D.B., Nakamura, E.

    Chemical Geology   396   2015

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.chemgeo.2014.12.025

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  • Origin of the ‘Ghost Plagioclase’ Signature in Galapagos Melt Inclusions: New Evidence from Pb Isotopes Reviewed

    M. E. Peterson, A. E. Saal, E. Nakamura, H. Kitagawa, M. D. Kurz, A. M. Koleszar

    Journal of Petrology   55 ( 11 )   2193 - 2216   2014.11

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    DOI: 10.1093/petrology/egu054

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  • Software Dedicated for the Curation of Geochemical Data Sets in Analytical Laboratories Reviewed

    Yusuke Yachi, Hiroshi Kitagawa, Tak Kunihiro, Eizo Nakamura

    Geostandards and Geoanalytical Research   38 ( 1 )   95 - 102   2014.3

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

    Software designed for analytical laboratories to guarantee traceability and accessibility of rocks with their geochemical properties has been developed. The software documents the sample origin, current sample location and the location of any sample subsets (e.g., thin sections, solutions, etc.), and archives all associated geochemical data sets. The software can be installed on a personal computer so is available for use in any laboratory and allows curation before and after publication. The software will be of use in integrating and sharing geological reference materials within and among institutes. In this article, the system design and implementation are detailed. All source codes for the software are available at .

    DOI: 10.1111/j.1751-908x.2013.00205.x

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/j.1751-908X.2013.00205.x

  • K–Ar analyses of the post-caldera lavas of Bratan volcano in Bali Island, Indonesia — Ar isotope mass fractionation to light isotope enrichment

    Sunyoung Ryu, Hiroshi Kitagawa, Eizo Nakamura, Tetsumaru Itaya, Koichiro Watanabe

    Journal of Volcanology and Geothermal Research   264   107 - 116   2013.8

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

    DOI: 10.1016/j.jvolgeores.2013.07.002

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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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  • 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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    A method for the simultaneous determination of Cd with In, Tl and Bi by isotope dilution-internal standardisation (ID-IS) ICP-QMS using the same aliquot for rare earth element and other trace element determinations was developed. Samples mixed with an enriched 149Sm spike were decomposed using a HF-HClO4 mixture, which was evaporated and then diluted with HNO3. After determination of Sm by ID-ICP-QMS and Cd, In, Tl and Bi concentrations were determined using the 149Sm intensity as an internal standard. The interference of MoO+ on Cd+ was corrected using the MoO+/Mo+ ratio separately measured using a Mo standard solution, and the validity of the externally determined oxide-forming ratio correction was evaluated. The MoO+/Mo+ ratios measured using the standard solution and samples were ∼ 0.0002 and <0.002, respectively. Detection limits for Cd, In, Tl and Bi in silicate samples were at levels of <1ngg-1 with a total uncertainty of <7%. Cadmium in the carbonaceous chondrites, Orgueil (CI1), Murchison (CM2) and Allende (CV3) as well as Cd, In, Tl and Bi in the reference materials, JB-2, JB-3, JA-1, JA-2, JA-3, JP-1 (GSJ), BHVO-1, AGV-1, PCC-1 and DTS-1 (USGS) and NIST SRM 610, 612, 614 and 616 were determined to show the applicability of this method. © 2010 International Association of Geoanalysts.

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

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  • Geochemical evolution of historical lavas from Askja Volcano, Iceland: Implications for mechanisms and timescales of magmatic differentiation Reviewed

    Takeshi Kuritani, Tetsuya Yokoyama, Hiroshi Kitagawa, Katsura Kobayashi, Eizo Nakamura

    Geochimica et Cosmochimica Acta   75 ( 2 )   570 - 587   2011.1

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

    DOI: 10.1016/j.gca.2010.10.009

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  • Assimilation and Fractional Crystallization Controlled by Transport Process of Crustal Melt: Implications from an Alkali Basalt–Dacite Suite from Rishiri Volcano, Japan Reviewed

    TAKESHI KURITANI, HIROSHI KITAGAWA, EIZO NAKAMURA

    Journal of Petrology   46 ( 7 )   1421 - 1442   2005.7

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    Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    DOI: 10.1093/petrology/egi021

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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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    Language:English   Publisher:Japan Association of Mineralogical Sciences  

    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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  • 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

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

    Ryoji Tanaka, Akio Makishima, Hiroshi Kitagawa, Eizo Nakamura

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

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    Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    DOI: 10.1039/b309948b

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  • 中琉球弧久米島宇江城岳層の玄武岩質安山岩の全岩K‐Ar年代 Reviewed

    KITAGAWA Hiroshi, SHINJO Ryuichi

    Japanese Magazine of Mineralogical and Petrological Sciences   30 ( 5 )   237 - 240   2001

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Association of Mineralogical Sciences  

    Whole-rock K-Ar dating for a basaltic andesite lava from the Uegusukudake Formation in Kume-jima, Central Ryukyu Arc, yields age of 2.13±0.19 Ma. The sample dated is from the middle horizon of the Formation. This age is compatible with recently published K-Ar ages of 2.76±0.48 and 2.24±0.10 Ma for a picrite basalt from the lowest part and an andesite from the upper part of the Formation, respectively. The age, however, is inconsistent with the previously reported K-Ar ages of 5.5 and 4.6 Ma. The result is also concordant with ages estimated from Sr isotopic ratios for molluscan fossils (∼3.2-3.1 Ma) for the Aka Formation underlying the Uegusukudake Formation. This result suggests that tholeiitic basalts and basaltic andesites erupted after the eruption of picrite basalts with a short time interval at the late Pliocene.

    DOI: 10.2465/gkk.30.237

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    Other Link: https://jlc.jst.go.jp/DN/JALC/00151298462?from=CiNii

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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

  • Temporal geochemical variation of Icelandic magmatism from 13 to 2 Ma

    Kitagawa, H, Kobayashi, K, Makishima, A, Nakamura, E

    GEOCHIMICA ET COSMOCHIMICA ACTA   70   A322-A322   2006

  • Geochemistry of volcanic rocks from eastern Iceland, and the secular variation of Icelandic magmatism from 1 to 13 Ma

    KITAGAWA Hiroshi, KOBAYASHI Katsura, NAKAMURA Eizo

    2004   233 - 233   2004.9

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  • Quantitative understanding of assimilation and fractional crystallization process beneath Rishiri Volcano, Japan -1 : Estimation of crustal melt flux

    KURITANI Takeshi, KITAGAWA Hiroshi, NAKAMURA Eizo

    2004   183 - 183   2004.9

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