Aqueous alteration of opaque assemblages in the Ningqiang carbonaceous chondrite: Evidence from oxygen isotopes
文献类型：期刊论文
| 作者 | Hsu, WB; Guan, YB; Hua, X; Wang, Y ; Leshin, LA; Sharp, TG
|
| 刊名 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 出版日期 | 2006-03-15 |
| 卷号 | 243期号:1-2页码:107-114 |
| 关键词 | opaque assemblages Ningqiang carbonaceous chondrite oxygen isotopes ion microprobe aqueous alteration |
| ISSN号 | 0012-821X |
| 英文摘要 | Chondrules and matrix of the Ningqiang carbonaceous chondrite contain numerous opaque assemblages (OAs). These OAs are mainly composed of Ni-rich metal, magnetite, sulfides, phosphates with minor amounts of silicates and trace amounts of Pt-metal grains. Their mineral assemblage is very similar to that of OAs found in Allende refractory inclusions. In this study, we performed in situ analyses of O-isotopic compositions of magnetite and whitlockite in OAs and of olivine adjacent to OAs from Ningqiang. O-isotopic compositions of magnetite vary by 16 parts per thousand in 618 0 and fall on a regression line with a slope of 0.51 and a mean Delta 17O of - 2.9 +/- 0.3 (1 sigma)parts per thousand in the three-O-isotope diagram. Magnetite grains have consistently higher Delta O-17 values than their adjacent olivine grains. The mineral chemistry and O-isotopic compositions of OAs in Ningqiang chondrules and matrix are most consistent with the formation of magnetites and whitlockite by aqueous alteration of preexisting metal alloys within a planetary body. Formation of magnetites and phosphates in OAs thus do not constrain processes in the early solar nebula, but rather provide information on metamorphism in a planetary environment. (c) 2006 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Geochemistry & Geophysics |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | METAL-RICH ASSEMBLAGES ; REFRACTORY INCLUSIONS ; ALLENDE METEORITE ; CV3 CHONDRITES ; ORIGIN ; COMPONENTS ; CHONDRULES ; HISTORY ; MG ; FREMDLINGE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000236214500010 |
| 公开日期 | 2012-02-07 |
| 源URL | [http://159.226.72.40/handle/332002/3606]  |
| 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.Purple Mt Observ, Lab Astrochem & Planetary Sci, Nanjing 210008, Peoples R China 2.Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA 3.Arizona State Univ, Dept Mech Aerosp Engn, Tempe, AZ 85287 USA 4.Arizona State Univ, Ctr Meteorite Studies, Tempe, AZ 85287 USA |
| 推荐引用方式 GB/T 7714 | Hsu, WB,Guan, YB,Hua, X,et al. Aqueous alteration of opaque assemblages in the Ningqiang carbonaceous chondrite: Evidence from oxygen isotopes[J]. EARTH AND PLANETARY SCIENCE LETTERS,2006,243(1-2):107-114. |
| APA | Hsu, WB,Guan, YB,Hua, X,Wang, Y,Leshin, LA,&Sharp, TG.(2006).Aqueous alteration of opaque assemblages in the Ningqiang carbonaceous chondrite: Evidence from oxygen isotopes.EARTH AND PLANETARY SCIENCE LETTERS,243(1-2),107-114. |
| MLA | Hsu, WB,et al."Aqueous alteration of opaque assemblages in the Ningqiang carbonaceous chondrite: Evidence from oxygen isotopes".EARTH AND PLANETARY SCIENCE LETTERS 243.1-2(2006):107-114. |
入库方式： OAI收割
来源：紫金山天文台
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