中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 天体化学和行星科学实验室  > 期刊论文
题名: Mineralogical anatomy and implications of a Ti-Sc-rich ultrarefractory inclusion from Sayh al Uhaymir 290 CH3 chondrite
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
学科分类: 天文和天体物理
DOI: 10.1016/j.gca.2015.04.052
文章类型: Article
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
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
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000355926900003
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14864
Appears in Collections:天体化学和行星科学实验室_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
2015019.pdf(2855KB)----开放获取View Download

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
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhang, Ai-Cheng]'s Articles
[Ma, Chi]'s Articles
[Sakamoto, Naoya]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhang, Ai-Cheng]‘s Articles
[Ma, Chi]‘s Articles
[Sakamoto, Naoya]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: 2015019.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace