干旱区生态环境知识资源中心(Arid): Water and heat: New constraints on the evolution of the CV chondrite parent body

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DOI	10.1016/j.gca.2020.03.009
	Water and heat: New constraints on the evolution of the CV chondrite parent body
	Bonal, Lydie 1; Gattacceca, Jerome 2; Garenne, Alexandre 1,3; Eschrig, Jolantha 1; Rochette, Pierre 2; Ruggiu, Lisa Kramer 2
通讯作者	Bonal, Lydie
来源期刊	GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN	0016-7037
EISSN	1872-9533
出版年	2020
卷号	276 页码:363-383
英文摘要	This paper focuses on the post-accretion history of CV3 chondrites, through a combination of petrographic and mineralogical characterization, magnetic measurements, spectral (Raman and Infrared) and thermo-gravimetric analysis of 31 meteorites (including 7 falls, 21 Antarctic and 3 non-Antarctic finds) spanning a wide metamorphic range. We classify the 21 Antarctic chondrites and the Bukhara fall into the CVRed, CVOxA, and CVOxB subgroups. We establish quantitative parameters relevant for this sub-classification. In comparison to CVOx, CVRed chondrites are characterized by (i) a lower abundance of matrix, (ii) a higher abundance of metal, (iii) the presence of Ni-poor sulfides. In comparison to CVOxB, CVOxA are characterized by (i) similar matrix abundance, (ii) a higher abundance of metal, (iii) the presence of metal almost exclusively under the form of awaruite, (iv) lower Ni content of sulfides, (v) lower magnetic susceptibility and saturation remanence. Both CVOx (CVOxA and CVOxB) and CVRed experienced aqueous alteration, and contain oxyhydroxides and phyllosilicates. We show that the abundance of these hydrated secondary minerals observed today in individual CV chondrites decreases with their peak metamorphic temperature. This is interpreted either as partial dehydration of these secondary minerals or limited hydration due to the rapid exhaustion of the water reservoir during parent body thermal metamorphism. Moreover, the lower abundance of oxyhydroxides (that have a lower thermal stability than phyllosilicates and may in large part postdate the peak of thermal metamorphism) in more metamorphosed CV chondrites is interpreted as lower availability of aqueous fluids during retrograde metamorphism in these meteorites. Lastly, we show that in comparison to CVOxB, CVOxA are systematically (i) more metamorphosed, (ii) less hydrated, (iii) depleted in ferromagnetic minerals, (iv) but enriched in metal in the form of secondary awaruite. CVOxA may be thermally metamorphosed CVOxB. CVRed are significantly different from CVOx (matrix abundances, alteration products, opaque minerals), but span the same wide metamorphic range. This could be indicative of a laterally heterogeneous CV parent body, or suggest the existence of distinct parent bodies for CVOx and CVRed chondrites. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	CV chondrites Classification Secondary processes Hydro-thermalism
类型	Article
语种	英语
国家	France ; USA
开放获取类型	Green Published, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000525416100022
WOS关键词	INSOLUBLE ORGANIC-MATTER ; AQUEOUS ALTERATION ; CARBONACEOUS CHONDRITES ; MAGNETIC CLASSIFICATION ; RAMAN-SPECTROSCOPY ; TYPE-3 CHONDRITES ; ALLENDE METEORITE ; STONY METEORITES ; ATACAMA DESERT ; BALI-LIKE
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314579
作者单位	1.Univ Grenoble Alpes, Inst Planetol & Astrophys Grenoble, CNRS CNES, F-38000 Grenoble, France; 2.Aix Marseille Univ, Coll France, CEREGE, INRAE,IRD,CNRS, Aix En Provence, France; 3.Lawrence Livermore Natl Lab, Nucl & Chem Sci Div, Livermore, CA 94550 USA
推荐引用方式 GB/T 7714	Bonal, Lydie,Gattacceca, Jerome,Garenne, Alexandre,et al. Water and heat: New constraints on the evolution of the CV chondrite parent body[J]. French National Research Institute for Sustainable Development,2020,276:363-383.
APA	Bonal, Lydie,Gattacceca, Jerome,Garenne, Alexandre,Eschrig, Jolantha,Rochette, Pierre,&Ruggiu, Lisa Kramer.(2020).Water and heat: New constraints on the evolution of the CV chondrite parent body.GEOCHIMICA ET COSMOCHIMICA ACTA,276,363-383.
MLA	Bonal, Lydie,et al."Water and heat: New constraints on the evolution of the CV chondrite parent body".GEOCHIMICA ET COSMOCHIMICA ACTA 276(2020):363-383.