中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 广州地球化学研究所
  3. 中国科学院广州地球化学研究所
  4. 中国科学院矿物学与成矿学重点实验室
Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu

文献类型：期刊论文

作者Miyahara, Masaaki47; Noguchi, Takaaki46; Matsumoto, Toru45,46; Tomioka, Naotaka44; Miyake, Akira46; Igami, Yohei46; Seto, Yusuke43; Haruta, Mitsutaka42; Saito, Hikaru40,41; Hata, Satoshi38,39
刊名METEORITICS & PLANETARY SCIENCE
出版日期2024-09-26
页码12
ISSN号1086-9379
DOI10.1111/maps.14271
英文摘要The surface morphology of regolith grains from the C-type asteroid Ryugu was studied in search of evidence of impact events on the asteroid. Scanning electron microscopy revealed that similar to 8% of C0105-042 Ryugu grains have a smooth surface on one side of the grains. One of these grains has striated linear grooves (striations) on its smooth surface. Transmission electron microscopy of the grain showed that a porous fine-grained Mg-Fe phyllosilicate assemblage, which is the main component of Ryugu grains, is compacted near the smooth surface. The smooth surface with striations closely resembles a slickenside, a characteristic texture found in terrestrial fault rocks formed by shear deformation. There is no evidence of melting/decomposition in the Mg-Fe phyllosilicates near the smooth surface, indicating that the shear heating temperature is less than similar to 1100 K. Assuming that the average length of the striations corresponds to the minimum displacement of the micro-fault, the shock pressure recorded in the C0105-042 Ryugu grain is estimated to be similar to 3.9 GPa) in previous studies suggest that the impact velocities recorded in these grains are < similar to 0.89-1.63 km s(-1). Based on the impact velocities, these grains may record an impact event that occurred when asteroid Ryugu was in the orbit in Main Belt.
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:001320363900001
源URL[http://ir.gig.ac.cn/handle/344008/81158]  
专题中国科学院矿物学与成矿学重点实验室
通讯作者Miyahara, Masaaki
作者单位1.Jacobs Engn, Dallas, TX USA
2.Nagoya Univ, Dept Earth & Environm Sci, Nagoya, Japan
3.Univ Tokyo, UTokyo Org Planetary & Space Sci, Tokyo, Japan
4.Kyushu Univ, Dept Earth & Planetary Sci, Fukuoka, Japan
5.Hokkaido Univ, Creat Res Inst Sousei, Sapporo, Japan
6.Hokkaido Univ, Dept Earth & Planetary Sci, Sapporo, Japan
7.Kanagawa Inst Technol, Dept Mech Engn, Atsugi, 2430292, Japan
8.SOKENDAI, Grad Univ Adv Studies, Hayama, Japan
9.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan
10.Tohoku Univ, Dept Earth Sci, Sendai, Japan
推荐引用方式
GB/T 7714		 Miyahara, Masaaki,Noguchi, Takaaki,Matsumoto, Toru,et al. Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu[J]. METEORITICS & PLANETARY SCIENCE,2024:12.
APA Miyahara, Masaaki.,Noguchi, Takaaki.,Matsumoto, Toru.,Tomioka, Naotaka.,Miyake, Akira.,...&Tsuda, Yuichi.(2024).Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu.METEORITICS & PLANETARY SCIENCE,12.
MLA Miyahara, Masaaki,et al."Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu".METEORITICS & PLANETARY SCIENCE (2024):12.

入库方式： OAI收割

来源：广州地球化学研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。