干旱区生态环境知识资源中心(Arid): Petrology and oxygen isotopic compositions of calcium-aluminum-rich inclusions in primitive CO3.0-3.1 chondrites

Arid

DOI	10.1111/maps.13473
	Petrology and oxygen isotopic compositions of calcium-aluminum-rich inclusions in primitive CO3.0-3.1 chondrites
	Zhang, Mingming 1,2,3; Bonato, Enrica 1,4; King, Ashley J.1; Russell, Sara S.1; Tang, Guoqiang 5; Lin, Yangting 2,3
通讯作者	Russell, Sara S.
来源期刊	METEORITICS & PLANETARY SCIENCE
ISSN	1086-9379
EISSN	1945-5100
出版年	2020
卷号	55 期号:4 页码:911-935
英文摘要	The petrologic and oxygen isotopic characteristics of calcium-aluminum-rich inclusions (CAIs) in CO chondrites were further constrained by studying CAIs from six primitive CO3.0-3.1 chondrites, including two Antarctic meteorites (DOM 08006 and MIL 090010), three hot desert meteorites (NWA 10493, NWA 10498, and NWA 7892), and the Colony meteorite. The CAIs can be divided into hibonite-bearing inclusions (spinel-hibonite spherules, monomineralic grains, hibonite-pyroxene microspherules, and irregular/nodular objects), grossite-bearing inclusions (monomineralic grains, grossite-melilite microspherules, and irregular/nodular objects), melilite-rich inclusions (fluffy Type A, compact type A, monomineralic grains, and igneous fragments), spinel-pyroxene inclusions (fluffy objects resembling fine-grained spinel-rich inclusions in CV chondrites and nodular/banded objects resembling those in CM chondrites), and pyroxene-anorthite inclusions. They are typically small (98.4 +/- 54.4 mu m, 1SD) and comprise 1.54 +/- 0.43 (1SD) area% of the host chondrites. Melilite in the hot desert and Colony meteorites was extensively replaced by a hydrated Ca-Al-silicate during terrestrial weathering and converted melilite-rich inclusions into spinel-pyroxene inclusions. The CAI populations of the weathered COs are very similar to those in CM chondrites, suggesting that complete replacement of melilite by terrestrial weathering, and possibly parent body aqueous alteration, would make the CO CAIs CM-like, supporting the hypothesis that CO and CM chondrites derive from similar nebular materials. Within the CO3.0-3.1 chondrites, asteroidal alteration significantly resets oxygen isotopic compositions of CAIs in CO3.1 chondrites ( increment O-17: -25 to -2 parts per thousand) but left those in CO3.0-3.05 chondrites mostly unchanged ( increment O-17: -25 to -20 parts per thousand), further supporting the model whereby thermal metamorphism became evident in CO chondrites of petrologic type >= 3.1. The resistance of CAI minerals to oxygen isotope exchange during thermal metamorphism follows in the order: melilite + grossite < hibonite + anorthite < spinel + diopside + forsterite. Meanwhile, terrestrial weathering destroys melilite without changing the chemical and isotopic compositions of melilite and other CAI minerals.
类型	Article
语种	英语
国家	England ; Peoples R China ; Scotland
收录类别	SCI-E
WOS记录号	WOS:000530157700001
WOS关键词	BEARING REFRACTORY INCLUSIONS ; SOLAR-SYSTEM EVIDENCE ; CARBONACEOUS CHONDRITE ; CM CHONDRITE ; HETEROGENEOUS DISTRIBUTION ; ENSTATITE CHONDRITES ; AQUEOUS ALTERATION ; TITANIUM ISOTOPES ; MINERAL CHEMISTRY ; SPINEL-RICH
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	中国科学院地质与地球物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319057
作者单位	1.Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England; 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Univ Glasgow, Sch Geog & Earth Sci, Glasgow G12 8QQ, Lanark, Scotland; 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mingming,Bonato, Enrica,King, Ashley J.,et al. Petrology and oxygen isotopic compositions of calcium-aluminum-rich inclusions in primitive CO3.0-3.1 chondrites[J]. 中国科学院地质与地球物理研究所,2020,55(4):911-935.
APA	Zhang, Mingming,Bonato, Enrica,King, Ashley J.,Russell, Sara S.,Tang, Guoqiang,&Lin, Yangting.(2020).Petrology and oxygen isotopic compositions of calcium-aluminum-rich inclusions in primitive CO3.0-3.1 chondrites.METEORITICS & PLANETARY SCIENCE,55(4),911-935.
MLA	Zhang, Mingming,et al."Petrology and oxygen isotopic compositions of calcium-aluminum-rich inclusions in primitive CO3.0-3.1 chondrites".METEORITICS & PLANETARY SCIENCE 55.4(2020):911-935.