气候变化领域集成服务门户(CCPortal): CV chondrites: More than one parent body

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DOI	10.1016/j.epsl.2020.116467
	CV chondrites: More than one parent body
	Gattacceca J.; Bonal L.; Sonzogni C.; Longerey J.
发表日期	2020
ISSN	0012821X
卷号	547
英文摘要	CV chondrites are one of the most studied group of carbonaceous chondrites. Based on a number of mineralogical features, they have been divided into three sub-groups: CVOxA, CVOxB, and CVRed. These sub-groups are classically interpreted as coming from a single parent body, with a common protolith affected by significant parent body fluid-assisted metasomatism occurring at different temperatures and/or redox conditions. In this work, we studied a set of 53 CV chondrites. We classified them into the three sub-groups, measured their apparent chondrule sizes and their matrix modal abundance. We measured the triple oxygen isotopic composition for 17 of them. The distributions of chondrule size and matrix abundances in CVOxA and CVOxB cannot be statistically distinguished. Conversely, CVRed and CVOx have distinct distributions. These two robust and simple petrographic indicators combined with the previous knowledge of the peak metamorphic temperatures experienced by these meteorites show that CVOx and CVRed originate from two distinct parent bodies. On the other hand, CVOxA and CVOxB likely originate from the same parent body, with CVOxA representing deeper, more metamorphosed levels. For clarification of the chondrite classification scheme, in which one group should ultimately represent a single parent body, we propose to divide the CV group into two proper groups (and not subgroups as in the current scheme), keeping the names CVRed and CVOx. These two groups can be readily separated by estimating the average nickel content of their sulfides. © 2020 Elsevier B.V.
关键词	carbonaceous chondrites chondrite parent bodies CV chondrites meteorite classification
英文关键词	Body fluids; Nickel compounds; Sulfur compounds; Carbonaceous chondrites; Classification scheme; Current schemes; Mineralogical features; Oxygen isotopic composition; Parent bodies; Protoliths; Redox condition; Meteorites; carbonaceous chondrite; chondrule; isotopic composition; metasomatism; mineralogy; nickel; oxygen isotope; parent body; redox conditions; sulfide
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202600
作者单位	CNRS, Aix Marseille Univ, IRD, INRAE, CEREGE, Aix-en-Provence, France; Institut de Planétologie et d'Astrophysique de Grenoble, Université Grenoble Alpes, CNRS, CNES, Grenoble, 38000, France
推荐引用方式 GB/T 7714	Gattacceca J.,Bonal L.,Sonzogni C.,et al. CV chondrites: More than one parent body[J],2020,547.
APA	Gattacceca J.,Bonal L.,Sonzogni C.,&Longerey J..(2020).CV chondrites: More than one parent body.Earth and Planetary Science Letters,547.
MLA	Gattacceca J.,et al."CV chondrites: More than one parent body".Earth and Planetary Science Letters 547(2020).