气候变化领域集成服务门户(CCPortal): Formation of chondrules and matrix in Kakangari chondrites

CCPortal

DOI	10.1016/j.epsl.2020.116286
	Formation of chondrules and matrix in Kakangari chondrites
	Barosch J.; Ebel D.S.; Hezel D.C.; Alpert S.; Palme H.
发表日期	2020
ISSN	0012821X
卷号	542
英文摘要	The study of chondritic meteorites and their components allows us to understand processes and conditions in the protoplanetary disk. Chondrites with high and about equal proportions of chondrules and matrix are ideal candidates to not only study the formation conditions of chondrules, but also the relationship between these two major components. An important question is whether these formed in the same or in separate reservoirs in the protoplanetary disk. So far, such studies have been mainly restricted to carbonaceous chondrites. We here expand these studies to the K (Kakangari-like) chondrite grouplet. These have various distinctive properties, but the abundance of major components – chondrules and matrix – is similar to other primitive meteorites. We obtained a comprehensive petrographic and chemical dataset of Kakangari and Lewis Cliff 87232 chondrules and matrix. Chondrules in Kakangari show a large compositional scatter, supporting material addition to chondrules during their formation. Contrary to almost all other chondrite groups, the majority of Kakangari chondrules are not mineralogically zoned. However, Kakangari chondrules were likely initially zoned, but then lost this zonation during chondrule remelting and fragmentation. Average compositions of bulk chondrules, matrix and bulk Kakangari are identical and approximately solar for Mg/Si. This might indicate the formation of chondrules and matrix from a common reservoir and would agree with findings from carbonaceous and Rumuruti chondrites: chondrules and matrix in most chondrite groups were not transported through the protoplanetary disk and then mixed together. Rather, these major components are genetically related to each other and formed in the same reservoir. © 2020 Elsevier B.V.
关键词	bulk chondrules chondrule formation complementarity Kakangari
英文关键词	Geology; Mathematical models; Average composition; Carbonaceous chondrites; Chondritic meteorites; Formation condition; Grouplet; Primitive meteorites; Protoplanetary disks; Supporting material; Meteorites; chondrite; chondrule; formation mechanism; matrix; petrography; planetary evolution
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/202477
作者单位	University of Cologne, Department of Geology and Mineralogy, Zülpicher Str. 49b, Köln, 50674, Germany; American Museum of Natural History, Department of Earth and Planetary Sciences, New York, NY 10024, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Graduate School and Graduate Center of the City University of New YorkNY, United States; Natural History Museum, Department of Mineralogy, Cromwell Road, London, SW7 5BD, United Kingdom; Forschungsinstitut und Naturmuseum Senckenberg, Senckenberganlage 25, Frankfurt am Main, D-60325, Germany
推荐引用方式 GB/T 7714	Barosch J.,Ebel D.S.,Hezel D.C.,et al. Formation of chondrules and matrix in Kakangari chondrites[J],2020,542.
APA	Barosch J.,Ebel D.S.,Hezel D.C.,Alpert S.,&Palme H..(2020).Formation of chondrules and matrix in Kakangari chondrites.Earth and Planetary Science Letters,542.
MLA	Barosch J.,et al."Formation of chondrules and matrix in Kakangari chondrites".Earth and Planetary Science Letters 542(2020).