Unique large diamonds in a ureilite from Almahata Sitta 2008 TC3 asteroid
文献类型：期刊论文
| 作者 | Miyahara, Masaaki1,2; Ohtani, Eiji1,3; El Goresy, Ahmed4; Lin, Yangting5; Feng, Lu5; Zhang, Jian-Chao5; Gillet, Philippe6; Nagase, Toshiro7; Muto, Jun1; Nishijima, Masahiko8 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2015-08-15 |
| 卷号 | 163页码:14-26 |
| DOI | 10.1016/j.gca.2015.04.035 |
| 文献子类 | Article |
| 英文摘要 | The Almahata Sitta MS-170 ureilite (a piece of a breccia originating from the asteroid, 2008 TC3) consists mainly of olivine, with many diamond and graphite grains existing between the olivine grains. The occurrences of the diamonds are unique; i.e., (i) some diamonds exhibit sub-euhedral habits and (ii) some diamonds have large grain-size (up to about 40 mu m). Several diamonds are segmented into many fragments by fractures. Individual fragments have similar crystallographic orientation, which implies that the adjacent diamond segments were originally a single crystal. Large diamond assemblages occur besides such individual diamond grains. In one of the largest assemblages (almost about 100 mu m in size) has also the same crystallographic orientation. They can be regarded as the pieces of a previously unique single diamond, which provides evidence for large single-crystals diamond in meteorites. Almahata Sitta MS-170 is a meteorite fragment from the 2008 TC3 asteroid that underwent less shock than other ureilitic meteorites. It is unlikely that such large diamonds were formed from graphite through a shock-induced phase transformation during planetesimal collision, despite this idea being now widely accepted as the diamond formation mechanism of ureilites. Fine-scale heterogeneous distribution of impurities (hydrogen, nitrogen, and oxygen) exists in single crystal diamonds, indicative of sluggish growth. This distribution is reminiscent of sector zoning growth. Its grain size, the shock features of MS-170, and the C- and N-isotopic composition signatures allow us to revive classical and but not widely accepted models for diamond formation in ureilites; i.e., a diamond formed from partially melted magma or a C-O-H fluid in the deep interior of the ureilite parent-body or, alternatively, through a chemical vapor deposition (CVD) process in the solar nebula. Considering present mineralogical and isotopic features, the former scenario is more favorable. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS关键词 | ISOTOPIC COMPOSITION ; ORIENTED GRAPHITE ; CORE FORMATION ; HIGH-PRESSURE ; ORIGIN ; CARBON ; TRANSFORMATION ; NITROGEN ; SPECTROSCOPY ; METEORITE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000355926900002 |
| 资助机构 | "Nanotechnology Support Project" of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; "Nanotechnology Support Project" of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; MEXT, Japan(22000002 ; MEXT, Japan(22000002 ; Ministry of Education and Science of Russian Federation(14.B25.31.0032) ; Ministry of Education and Science of Russian Federation(14.B25.31.0032) ; Natural Science Foundation of China(26800277 ; Natural Science Foundation of China(26800277 ; 26800277) ; 26800277) ; 41173075 ; 41173075 ; 41273077) ; 41273077) ; "Nanotechnology Support Project" of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; "Nanotechnology Support Project" of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan ; MEXT, Japan(22000002 ; MEXT, Japan(22000002 ; Ministry of Education and Science of Russian Federation(14.B25.31.0032) ; Ministry of Education and Science of Russian Federation(14.B25.31.0032) ; Natural Science Foundation of China(26800277 ; Natural Science Foundation of China(26800277 ; 26800277) ; 26800277) ; 41173075 ; 41173075 ; 41273077) ; 41273077) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62512]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 作者单位 | 1.Tohoku Univ, Grad Sch Sci, Dept Earth Sci, Sendai, Miyagi 9808578, Japan 2.Hiroshima Univ, Grad Sch Sci, Dept Earth & Planetary Syst Sci, Higashihiroshima 7398526, Japan 3.Russian Acad Sci, VS Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia 4.Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 6.Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland 7.Tohoku Univ, Ctr Acad Resources & Arch, Sendai, Miyagi 9808578, Japan 8.Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan |
| 推荐引用方式 GB/T 7714 | Miyahara, Masaaki,Ohtani, Eiji,El Goresy, Ahmed,et al. Unique large diamonds in a ureilite from Almahata Sitta 2008 TC3 asteroid[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2015,163:14-26. |
| APA | Miyahara, Masaaki.,Ohtani, Eiji.,El Goresy, Ahmed.,Lin, Yangting.,Feng, Lu.,...&Nishijima, Masahiko.(2015).Unique large diamonds in a ureilite from Almahata Sitta 2008 TC3 asteroid.GEOCHIMICA ET COSMOCHIMICA ACTA,163,14-26. |
| MLA | Miyahara, Masaaki,et al."Unique large diamonds in a ureilite from Almahata Sitta 2008 TC3 asteroid".GEOCHIMICA ET COSMOCHIMICA ACTA 163(2015):14-26. |
入库方式： OAI收割
来源：地质与地球物理研究所
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