2024/03/12 更新

写真a

キタガワ ヒロシ
北川 宙
Hiroshi Kitagawa
所属
惑星物質研究所 助教
職名
助教
連絡先
メールアドレス

学位

  • 博士(学術) ( 2006年3月   岡山大学 )

研究キーワード

  • 地球化学

  • 火山学

  • 岩石学

  • 地球惑星物質科学

  • 地質学

  • 年代学

  • 分析化学

研究分野

  • 自然科学一般 / 固体地球科学  / マグマ

  • 自然科学一般 / 宇宙惑星科学

学歴

  • 岡山大学   The Graduate School of Natural Science and Technology  

    2002年4月 - 2006年3月

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    国名: 日本国

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  • 琉球大学   Graduate School of Engineering and Science   Physics and Earth Sciences

    2000年4月 - 2002年3月

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    国名: 日本国

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  • 琉球大学   Faculty of Science   Department of Physics and Earth Sciences, Earth Sciences Program

    1996年4月 - 2000年3月

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    国名: 日本国

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経歴

  • 岡山大学惑星物質研究所   惑星システム科学部門   助教   博士(学術)

    2015年2月 - 現在

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    国名:日本国

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  • 岡山大学地球物質科学研究センター   スーパーテクニシャン(特別契約職員)   博士(学術)

    2008年4月 - 2015年1月

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    国名:日本国

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  • 岡山大学地球物質科学研究センター   特別契約職員助教   博士(学術)

    2006年4月 - 2008年3月

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    国名:日本国

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所属学協会

  • 日本鉱物学会

    2001年1月 - 現在

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論文

  • Lithium Isotope Constraints on Slab and Mantle Contribution to Arc Magmas 査読 国際誌

    Wei Zhang, Hiroshi Kitagawa, Eizo Nakamura

    Journal of Geophysical Research: Solid Earth   128 ( 5 )   2023年5月

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    担当区分:責任著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Geophysical Union (AGU)  

    Abstract

    Dehydration of subducting oceanic lithosphere (slab) induces Li‐isotope fractionation between the fluid and the slab, suggested by the δ7Li variation (∼10‰) in exhumed subduction complexes. Given that arc magmas represent melt of the supraslab mantle, a large δ7Li variation is anticipated for arc volcanic rocks. However, the δ7Li values in these rocks are mostly homogeneous within the range of mid‐ocean ridge basalts (+1.6 to +5.6‰). The lack of a subduction‐related δ7Li signature has been explained by (a) homogenization by mixing of different magma sources, (b) loss of Li from the slab via dehydration, or (c) homogenization by diffusive exchange of slab‐derived Li and the mantle. The Chugoku district in SW Japan is an ideal place to study the process responsible for Li‐isotope variation in arc magmas, since the Chugoku volcanic rocks show large δ7Li variation (−1.9 to +7.4‰). High δ7Li values (+6.3 to +7.4‰) are found in some high‐Sr andesites and dacites (adakites) whereas low δ7Li values (−1.0 to −0.1‰) are found in high‐Mg andesites. The parental magmas of these rocks have been sourced from subducted oceanic crust and sediments, respectively, with various extents of the interaction with wedge mantle. The limited extents of Li isotope modification are indicated by the similarity of the δ7Li values of these rocks and their supposed sources. The models for a slab dehydration and a diffusive exchange between slab‐derived melt and mantle demonstrate that the δ7Li signatures of the sources can be preserved in the adakites if they ascent rapidly in mantle.

    DOI: 10.1029/2022jb025670

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  • A rapid method of simultaneous chromatographic purification of Li and Mg for isotopic analyses using MC-ICP-MS 査読 国際共著 国際誌

    Wei Zhang, Ryoji Tanaka, Hiroshi Kitagawa, Madeleine Bohlin, Eizo Nakamura

    International Journal of Mass Spectrometry   480   116893 - 116893   2022年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier {BV}  

    DOI: 10.1016/j.ijms.2022.116893

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  • On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective 査読 国際誌

    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

    Proceedings of the Japan Academy, Series B   98 ( 6 )   227 - 282   2022年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Japan Academy  

    DOI: 10.2183/pjab.98.015

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  • Bilateral Heterogeneity in an Upwelling Mantle via Double Subduction of Oceanic Lithosphere 査読 国際共著 国際誌

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

    Journal of Geophysical Research: Solid Earth   127 ( 5 )   2022年5月

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    担当区分:責任著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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 査読 国際共著 国際誌

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

    Journal of Petrology   61 ( 6 )   2020年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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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    その他リンク: http://academic.oup.com/petrology/article-pdf/61/6/egaa060/37165138/egaa060.pdf

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

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

    Journal of Geophysical Research: Solid Earth   125 ( 10 )   2020年10月

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    担当区分:責任著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:American Geophysical Union (AGU)  

    DOI: 10.1029/2019JB019143

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    その他リンク: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2019JB019143

  • Transition from Plume-driven to Plate-driven Magmatism in the Evolution of the Main Ethiopian Rift 査読 国際共著 国際誌

    Dejene Hailemariam Feyissa, Hiroshi Kitagawa, Tesfaye Demissie Bizuneh, Ryoji Tanaka, Kurkura Kabeto, Eizo Nakamura

    Journal of Petrology   60 ( 8 )   1681 - 1715   2019年8月

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    担当区分:責任著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Oxford University Press (OUP)  

    Abstract

    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.

    DOI: 10.1093/petrology/egz043

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    その他リンク: http://academic.oup.com/petrology/article-pdf/60/8/1681/31282958/egz043.pdf

  • Hypervelocity collision and water-rock interaction in space preserved in the Chelyabinsk ordinary chondrite 査読 国際共著 国際誌

    Nakamura, E., Kunihiro, T., Ota, T., Sakaguchi, C., Tanaka, R., Kitagawa, H., Kobayashi, K., Yamanaka, M., Shimaki, Y., Bebout, G.E., Miura, H., Yamamoto, T., Malkovets, V., Grokhovsky, V., Koroleva, O., Litasov, K.

    Proceedings of the Japan Academy Series B: Physical and Biological Sciences   95 ( 4 )   165 - 177   2019年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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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  • Origin of ocean island basalts in the West African passive margin without mantle plume involvement 査読

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

    Nature Communications   10 ( 1 )   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1038/s41467-019-10832-7

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  • Determination of Abundances of Fifty-Two Elements in Natural Waters by ICP-MS with Freeze-Drying Pre-concentration 査読

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

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

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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 査読

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

    Journal of Geophysical Research: Solid Earth   123 ( 5 )   3698 - 3728   2018年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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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  • 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 査読

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

    Lithos   282-283   240 - 261   2017年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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. 査読

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

    Geochemistry, Geophysics, Geosystems   16 ( 9 )   2848 - 2852   2015年9月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:American Geophysical Union (AGU)  

    DOI: 10.1002/2015GC005914

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    その他リンク: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/2015GC005914

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

    Schiavi, F., Rosciglione, A., Kitagawa, H., Kobayashi, K., Nakamura, E., Nuccio, P.M., Ottolini, L., Paonita, A., Vannucci, R.

    Geochemistry, Geophysics, Geosystems   16 ( 7 )   2109 - 2126   2015年7月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元: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 査読

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

    Chemical Geology   396   2015年

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    掲載種別:研究論文(学術雑誌)  

    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 査読

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

    Journal of Petrology   55 ( 11 )   2193 - 2216   2014年11月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元: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 査読

    Yachi, Y., Kitagawa, H., Kunihiro, T., Nakamura, E.

    Geostandards and Geoanalytical Research   38 ( 1 )   95 - 102   2014年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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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    その他リンク: 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 査読

    Ryu, S., Kitagawa, H., Nakamura, E., Itaya, T., Watanabe, K.

    Journal of Volcanology and Geothermal Research   264   107 - 116   2013年8月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元: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 査読

    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年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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 査読

    Akio Makishima, Hiroshi Kitagawa, Eizo Nakamura

    Geostandards and Geoanalytical Research   35 ( 1 )   57 - 67   2011年3月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Wiley  

    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 査読

    Kuritani, T., Yokoyama, T., Kitagawa, H., Kobayashi, K., Nakamura, E.

    Geochimica et Cosmochimica Acta   75 ( 2 )   570 - 587   2011年1月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Elsevier BV  

    DOI: 10.1016/j.gca.2010.10.009

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

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

    Journal of Petrology   49 ( 7 )   1365 - 1396   2008年5月

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    担当区分:筆頭著者   掲載種別:研究論文(学術雑誌)   出版者・発行元:Oxford University Press (OUP)  

    DOI: 10.1093/petrology/egn029

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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 査読

    Kuritani, T., Kitagawa, H., Nakamura, E.

    Journal of Petrology   46 ( 7 )   1421 - 1442   2005年7月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Oxford University Press (OUP)  

    DOI: 10.1093/petrology/egi021

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  • 同位体希釈法と内標準法を併用した、ICP質量分析法によるLi, Be, Rb, Sr, Y, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Pb, Th, Uの同時測定法の開発

    牧嶋 昭夫, 北川 宙, 坂口 千恵, 中村 栄三

    日本鉱物学会・学術講演会,日本岩石鉱物鉱床学会学術講演会講演要旨集   2004   237 - 237   2004年9月

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    記述言語:英語   出版者・発行元:日本鉱物科学会  

    同位体希釈法と内標準法を併用した、ICP質量分析法によるLi, Be, Rb, Sr, Y, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Pb, Th, Uの同時測定法の開発をおこなった。

    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 査読

    Tanaka R, Kitagawa H, Makishima A, Nakamura E

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

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

    Ryoji Tanaka, Akio Makishima, Hiroshi Kitagawa, Eizo Nakamura

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

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Royal Society of Chemistry (RSC)  

    DOI: 10.1039/b309948b

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  • Whole-rock K-Ar age for a basaltic andesite from the Uegusukudake Formation in Kume-jima, Central Ryukyu Arc. 査読

    KITAGAWA Hiroshi, SHINJO Ryuichi

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

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    担当区分:筆頭著者, 責任著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元: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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  • The Formation of a Rubble Pile Asteroid: Insights from the Asteroid Ryugu 査読 国際誌

    Tsutomu Ota, Christian Potiszil, Katsura Kobayashi, Ryoji Tanaka, Hiroshi Kitagawa, Tak Kunihiro, Chie Sakaguchi, Masahiro Yamanaka, Eizo Nakamura

    Universe   9 ( 6 )   2023年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:MDPI  

    DOI: 10.3390/universe9060293

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  • Organic Matter in the Asteroid Ryugu: What We Know So Far 査読 国際誌

    Christian Potiszil, Masahiro Yamanaka, Chie Sakaguchi, Tsutomu Ota, Hiroshi Kitagawa, Tak Kunihiro, Ryoji Tanaka, Katsura Kobayashi, Eizo Nakamura

    Life   13 ( 7 )   2023年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:MDPI  

    DOI: 10.3390/life13071448

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  • Insights into the formation and evolution of extraterrestrial amino acids from the asteroid Ryugu 国際誌

    Christian Potiszil, Tsutomu Ota, Masahiro Yamanaka, Chie Sakaguchi, Katsura Kobayashi, Ryoji Tanaka, Tak Kunihiro, Hiroshi Kitagawa, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Tomohiro Usui, Sei-ichiro Watanabe, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Eizo Nakamura

    Nature Communications   14 ( 1 )   2023年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Springer Science and Business Media LLC  

    Abstract

    All life on Earth contains amino acids and carbonaceous chondrite meteorites have been suggested as their source at the origin of life on Earth. While many meteoritic amino acids are considered indigenous, deciphering the extent of terrestrial contamination remains an issue. The Ryugu asteroid fragments (JAXA Hayabusa2 mission), represent the most uncontaminated primitive extraterrestrial material available. Here, the concentrations of amino acids from two particles from different touchdown sites (TD1 and TD2) are reported. The concentrations show that N,N-dimethylglycine (DMG) is the most abundant amino acid in the TD1 particle, but below detection limit in the other. The TD1 particle mineral components indicate it experienced more aqueous alteration. Furthermore, the relationships between the amino acids and the geochemistry suggest that DMG formed on the Ryugu progenitor body during aqueous alteration. The findings highlight the importance of aqueous chemistry for defining the ultimate concentrations of amino acids in primitive extraterrestrial samples.

    DOI: 10.1038/s41467-023-37107-6

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    その他リンク: https://www.nature.com/articles/s41467-023-37107-6

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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年

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  • 地球惑星試料デポジトリDREAMの構想と現状

    北川宙, 谷内勇介, 国広卓也, 中村栄三

    宇宙航空研究開発機構研究開発報告 JAXA-RR-   ( 13-010 )   2014年

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  • 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年

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    担当区分:筆頭著者  

    DOI: 10.1016/j.gca.2006.06.650

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  • 利尻火山下マグマ溜まりにおけるAFC過程の定量的解明-1 : 地殻メルトフラックスの推定

    栗谷 豪, 北川 宙, 中村 栄三

    日本鉱物学会・学術講演会,日本岩石鉱物鉱床学会学術講演会講演要旨集   2004   183 - 183   2004年9月

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  • 東部アイスランドの火山岩の地球化学的特徴と1-13 Maの時間変化

    北川 宙, 小林 桂, 中村 栄三

    日本鉱物学会・学術講演会,日本岩石鉱物鉱床学会学術講演会講演要旨集   2004   233 - 233   2004年9月

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    担当区分:筆頭著者   記述言語:英語  

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  • Petrology and Petrogenesis of Volcanic Rocks from the Uegusukudake Formation in Kume-jima, Central Ryukyu Arc

    Kitagawa Hiroshi, Shinjo Ryuichi, Kato Yuzo, 新城 竜一

    琉球大学理学部紀要   ( 77 )   81 - 103   2004年3月

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    担当区分:筆頭著者, 責任著者   記述言語:英語   出版者・発行元:琉球大学理学部  

    Major and trace element concentrations and Sr and Nd isotopic ratios are presented for volcanic rocks from the Uegusukudake Formation (~$3-2 Ma) in Kume-jima, central Ryukyu Arc, in order to understand the origin of varieties of erupted magmas. The Uegusukudake Formation is mainly composed of lavas and pyroclastic rocks with subordinate dikes. Volcanic rocks collected from lavas and dikes are grouped into four types based on their petrological characteristics: (1) picrite basalt (PB); (2) aphyric, tholeiitic basalt and basaltic andesite (A-TH); (3) porphyritic, tholeiitic basaltic andesite (P-TH); and (4) porphyritic, calc-alkaline basaltic andesite and andesite (CA), in ascending order. The PB sample is isotopically distinct in having significantly low ^<87>Sr/^<86>Sr (0.7035) and high ^<143>Nd/^<144>Nd (0.51290) compared with the other three types. The A-TH, P-TH, and CA types have similar isotopic compositions (^<87>Sr/^<86>Sr=0.7045-0.7054, ^<143>Nd/^<144>Nd=0.51270-0.51284) and show rather coherent incompatible trace element patterns. These results suggest that the three types of magmas were derived from a similar source material, distinctive from the source of the PB magma. A slight difference in isotopic and trace element ratios (La/Sm and La/Yb) among the three types can be attributed to the different degree of contributions of crustal assimilation. Geochemical variations within the A-TH type rocks can be explained by fractional crystallization, and the variation of the CA type is considered to have resulted from internal hybridization within a single magma reservoir. For the variation of the P-TH type, plagioclase accumulation is inferred to have played a dominant role.

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    その他リンク: http://hdl.handle.net/20.500.12000/5383

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