CV Chondrites: More than One Parent Body

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Gattacceca J., Bonal L., Sonzogni C., Longerey J.

82nd Annual Meeting of The Meteoritical Society 2019

PDF abstract

“CV chondrites have been classically divided into reduced (CVRed) and oxidized (CVOx) sub-groups, based on a number of mineralogical features, the Ni content of sulfides and the abundance of Fe,Ni metal [1]. The oxidized sub-group has been further divided into Allende- (CVOxA) and Bali- (CVOxB) type, based on a combination of chemical and petrographic criteria [e.g., 2, 3]. These three sub-groups are interpreted as coming from a single parent body, with a common protolith affected by significant parent body fluid-assisted metasomatism occurring at different temperature and/or redox conditions [2,4]. CK chondrites have been interpreted as coming from a more thermally metamorphosed (deeper) part of the same CV parent body [e.g., 5,6], but this interpretation has been recently challenged [7]. In this work we will argue that although CVOxA and CVOxB are likely to originate from a single parent body, CVOx and CVRed originate from two different parent bodies. “

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