Updated on 2025/04/02

写真a

 
SAKAGUCHI Chie
 
Organization
Scheduled update Assistant
Position
Assistant
External link

Degree

  • 修士(理学) ( 茨城大学 )

 

Papers

  • Deep recycling of volatile elements in the mantle: Evidence from the heterogeneous B isotope in intra-plate basalts Reviewed

    Yan-Qing Li, Hiroshi Kitagawa, Chang-Qian Ma, Eizo Nakamura, Chie Sakaguchi, Katsura Kobayashi, Xiang-Yun Hu

    Geoscience Frontiers   15 ( 6 )   2024.11

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

    DOI: 10.1016/j.gsf.2024.101900

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  • Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material

    Ryoji Tanaka, Dilan M. Ratnayake, Tsutomu Ota, Noah Miklusicak, Tak Kunihiro, Christian Potiszil, Chie Sakaguchi, Katsura Kobayashi, Hiroshi Kitagawa, Masahiro Yamanaka, 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

    The Astrophysical Journal   965 ( 1 )   52 - 52   2024.4

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    Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    Abstract

    The analysis of samples returned from the C-type asteroid Ryugu has drastically advanced our knowledge of the evolution of early solar system materials. However, no consensus has been obtained on the chronological data, which is important for understanding the evolution of the asteroid Ryugu. Here, the aqueous alteration age of Ryugu particles was determined by the Mn–Cr method using bulk samples, yielding an age of 4.13 + 0.62/−0.55 Myr after the formation of Ca–Al-rich inclusions (CAI). The age corresponds to 4563.17 + 0.60/−0.67 Myr ago. The higher 55Mn/52Cr, ε 54Cr, and initial ε 53Cr values of the Ryugu samples relative to any carbonaceous chondrite samples implies that its progenitor body formed from the least thermally processed precursors in the outermost region of the protoplanetary disk. Despite accreting at different distances from the Sun, the hydrous asteroids (Ryugu and the parent bodies of CI, CM, CR, and ungrouped C2 meteorites) underwent aqueous alteration during a period of limited duration (3.8 ± 1.8 Myr after CAI). These ages are identical to the crystallization age of the carbonaceous achondirtes NWA 6704/6693 within the error. The ε 54Cr and initial ε 53Cr values of Ryugu and NWA 6704/6693 are also identical, while they show distinct Δ'17O values. This suggests that the precursors that formed the progenitor bodies of Ryugu and NWA 6703/6693 were formed in close proximity and experienced a similar degree of thermal processing in the protosolar nebula. However, the progenitor body of Ryugu was formed by a higher ice/dust ratio, than NWA6703/6693, in the outer region of the protoplanetary disk.

    DOI: 10.3847/1538-4357/ad276a

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    Other Link: https://iopscience.iop.org/article/10.3847/1538-4357/ad276a/pdf

  • The Formation of a Rubble Pile Asteroid: Insights from the Asteroid Ryugu Reviewed

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

    Universe   2023.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/universe9060293

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  • Organic Matter in the Asteroid Ryugu: What We Know So Far Invited Reviewed

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

    Life   2023.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3390/life13071448

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  • Spectroscopic and Biophysical Methods to Determine Differential Salt‐Uptake by Primitive Membraneless Polyester Microdroplets

    Chen Chen, Ruiqin Yi, Motoko Igisu, Chie Sakaguchi, Rehana Afrin, Christian Potiszil, Tak Kunihiro, Katsura Kobayashi, Eizo Nakamura, Yuichiro Ueno, André Antunes, Anna Wang, Kuhan Chandru, Jihua Hao, Tony Z. Jia

    Small Methods   2023.5

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

    Abstract

    α‐Hydroxy acids are prebiotic monomers that undergo dehydration synthesis to form polyester gels, which assemble into membraneless microdroplets upon aqueous rehydration. These microdroplets are proposed as protocells that can segregate and compartmentalize primitive molecules/reactions. Different primitive aqueous environments with a variety of salts could have hosted chemistries that formed polyester microdroplets. These salts could be essential cofactors of compartmentalized prebiotic reactions or even directly affect protocell structure. However, fully understanding polyester–salt interactions remains elusive, partially due to technical challenges of quantitative measurements in condensed phases. Here, spectroscopic and biophysical methods are applied to analyze salt uptake by polyester microdroplets. Inductively coupled plasma mass spectrometry is applied to measure the cation concentration within polyester microdroplets after addition of chloride salts. Combined with methods to determine the effects of salt uptake on droplet turbidity, size, surface potential and internal water distribution, it was observed that polyester microdroplets can selectively partition salt cations, leading to differential microdroplet coalescence due to ionic screening effects reducing electrostatic repulsion forces between microdroplets. Through applying existing techniques to novel analyses related to primitive compartment chemistry and biophysics, this study suggests that even minor differences in analyte uptake can lead to significant protocellular structural change.

    DOI: 10.1002/smtd.202300119

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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

  • Geochemistry of volcanic and plutonic rocks from the southern Musoma-Mara greenstone belt: Implication for the evolution of the Tanzania craton

    C. W. Messo, K. Yamashita, K. Kobayashi, A. Makishima, C. Sakaguchi, E. Nakamura

    GEOCHIMICA ET COSMOCHIMICA ACTA   72 ( 12 )   A622 - A622   2008.7

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    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

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

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

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

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    Publisher:Japan Association of Mineralogical Sciences  

    DOI: 10.14824/jampeg.2002.0.251.0

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