Mineralogical anatomy and implications of a Ti-Sc-rich ultrarefractory inclusion from Sayh al Uhaymir 290 CH3 chondrite
文献类型：期刊论文
| 作者 | Zhang, Ai-Cheng1,2; Ma, Chi3; Sakamoto, Naoya4; Wang, Ru-Cheng1; Hsu, Wei-Biao5; Yurimoto, Hisayoshi2,4 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2015-08-15 |
| 卷号 | 163页码:27-39 |
| 英文摘要 | Titanium-rich minerals are common in Ca-Al-rich inclusions from primitive chondrites. They are important not only for testing the condensation models for a gas with a solar composition, but also for constraining the redox conditions of the early solar nebula. In this study, we report the detailed mineralogical features and its oxygen isotope compositions of a Ti-Sc-rich ultrarefractory inclusion A0031 from a CH3 chondrite Sayh al Uhaymir 290. The A0031 inclusion has a compact and layered texture with the interior consisting of panguite, Sc-rich anosovite, Ti-rich davisite, and anorthite. A few hexaferrum, perovskite, and spinel crystals are present as inclusions in these minerals. Outside of Ti-rich davisite are a layer of Al-Ti-rich diopside and two grains of enstatite. This texture strongly suggests that A0031 has a condensation origin. Panguite is its third occurrence in nature and similar in composition to the type panguite from the Allende meteorite. Sc-rich anosovite in A0031 has a chemical formula of (Ti4+, Ti3+, Mg, Sc, Al)(3)O-5 with the pseudobrookite structure. This is the second report of Ti3O5 in nature, but is the first description of anosovite formed in the solar nebula as an ultrarefractory phase. The discovery of Sc-rich anosovite in A0031 reveals the stability of Ti3O5 in the early solar nebula and supports the prediction of previous equilibrium condensation calculations. The panguite, Sc-rich anosovite, and Ti-rich davisite in A0031 show a large variation in Ti3+/Ti-tot. The primitive nature of A0031 implies that the variations in Ti3+/Titot among different Ti-rich minerals are primary features. We propose that the distribution of Ti3+ and Ti4+ could be controlled mainly by their various competition abilities of incorporating into these Ti-Sc-Al-rich minerals. Similarity of Ti3+/Ti-tot value between Ti-rich davisite from A0031 and those in other carbonaceous chondrites indicates that most refractory inclusions might have formed in highly reducing nebular settings. The O-16-depleted isotope compositions of A0031 confirm the existence of diverse oxygen reservoirs for CH Ca-Al-rich inclusions in the solar nebula. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | 天文和天体物理 |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | EARLY SOLAR NEBULA ; WARK-LOVERING RIM ; ALLENDE METEORITE ; REFRACTORY INCLUSIONS ; CARBONACEOUS CHONDRITE ; PROGRESSIVE OXIDATION ; ISOTOPIC COMPOSITIONS ; PRIMITIVE METEORITES ; CRYSTAL-STRUCTURE ; HIGH-TEMPERATURE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000355926900003 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/14864]  |
| 专题 | 紫金山天文台_天体化学和行星科学实验室 |
| 作者单位 | 1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210046, Jiangsu, Peoples R China 2.Hokkaido Univ, Dept Nat Hist Sci, Sapporo, Hokkaido 0600810, Japan 3.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA 4.Hokkaido Univ, Creat Res Inst Sousei, Isotope Imaging Lab, Sapporo, Hokkaido 0010021, Japan 5.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ai-Cheng,Ma, Chi,Sakamoto, Naoya,et al. Mineralogical anatomy and implications of a Ti-Sc-rich ultrarefractory inclusion from Sayh al Uhaymir 290 CH3 chondrite[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2015,163:27-39. |
| APA | Zhang, Ai-Cheng,Ma, Chi,Sakamoto, Naoya,Wang, Ru-Cheng,Hsu, Wei-Biao,&Yurimoto, Hisayoshi.(2015).Mineralogical anatomy and implications of a Ti-Sc-rich ultrarefractory inclusion from Sayh al Uhaymir 290 CH3 chondrite.GEOCHIMICA ET COSMOCHIMICA ACTA,163,27-39. |
| MLA | Zhang, Ai-Cheng,et al."Mineralogical anatomy and implications of a Ti-Sc-rich ultrarefractory inclusion from Sayh al Uhaymir 290 CH3 chondrite".GEOCHIMICA ET COSMOCHIMICA ACTA 163(2015):27-39. |
入库方式： OAI收割
来源：紫金山天文台
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