論文

基本情報

氏名 畠山 唯達
氏名(カナ) ハタケヤマ タダヒロ
氏名(英語) Hatakeyama Tadahiro
所属 機構 研究社会連携機構 フロンティア理工学研
職名 教授
researchmap研究者コード 1000292674
researchmap機関 岡山理科大学

題名

Rock Magnetic Characterization of Returned Samples From Asteroid (162173) Ryugu: Implications for Paleomagnetic Interpretation and Paleointensity Estimation

単著・共著の別

著者

Sato M. Kimura Y. Tanaka S. Hatakeyama T. Sugita S. Nakamuna T. Tachibana S. Yurimoto H. Noguchi T. Okazaki R. Yabuta H. Naraoka H. Sakamoto K. Yada T. Nishimura M. Nakato A. Miyazaki A. Yogata K. Abe M. Okada T. Usui T. Yoshikawa M. Saiki T. Terui F. Nakazawa S. Watanabe S. Tsuda Y.

概要

In this study, systematic rock magnetic measurements and saturation isothermal remanent magnetization (SIRM) paleointensity calibration experiments were conducted for the returned samples from C-type asteroid (162173) Ryugu and two carbonaceous chondrites (Orgueil and Tagish Lake) to evaluate the remanence carriers of the Ryugu sample and its ability as a paleomagnetic recorder. Our magnetic measurements show that Ryugu samples exhibit signatures for framboidal magnetite, coarse-grained magnetite, and pyrrhotite, and that framboidal magnetite is the dominant remanence carrier of Ryugu samples in the middle-coercivity range. The SIRM paleointensity constant was obtained for two Ryugu samples, and the median value was 3,318?±?1,038?μT, which is close to the literature's value based on the average among  magnetite, titanomagnetite, pyrrhotite, and FeNi alloys and is widely used for SIRM paleointensity experiments. The paleointensity values estimated using the obtained SIRM paleointensity constant indicate a strong magnetic field of the protoplanetary disk, suggesting that Sun's protoplanetary disk existed at the disk location of Ryugu's parent planetesimal when framboidal magnetite precipitated from the aqueous fluid.

発表雑誌等の名称

Journal of Geophysical Research, Planets                        

出版者

127

開始ページ

e2022JE007405

終了ページ

発行又は発表の年月

2022/10

査読の有無

有り

招待の有無

無し

記述言語

掲載種別

ISSN

ID:DOI

https://doi.org/10.1029/2022JE007405

ID:NAID(CiNiiのID)

ID:PMID

URL

JGlobalID

arXiv ID

ORCIDのPut Code

DBLP ID