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Clay minerals in primitive meteorites and interplanetary dust 1Many meteorites and interplanetary dust particles (IDPs) with primitive compositions contain significant amounts of phyllosilicate minerals, which are generally interpreted as evidence of protoplanetary aqueous alteration at an early period of the solar system. These meteorites are chondrites (near solar composition) of the carbonaceous and ordinary varieties. The former are subdivided (according to bulk composition and petrology) into CI, CM, CV, CO, CR, and ungrouped classes. IDPs are extraterrestrial particulates, collected in stratosphere, which have chemical compositions indicative of a primitive origin; they are typically distinct from the primitive meteorites. Characterization of phyllosilicates in these materials is a high priority because of the important physico-chemical information they hold. The most common phyllosilicates present in chondritic extraterrestrial materials are serpentine-group minerals, smectites, and micas. We discuss these phyllosilicates and describe the interpretation of their occurrence in meteorites and IDPs and what this indicates about history of their parent bodies, which are probably the hydrous asteroids.
Document ID
19920001038
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zolensky, M. E.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Keller, L. P.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Program and Abstracts for Clay Minerals Society 28th Annual Meeting
Subject Category
Astrophysics
Accession Number
92N10256
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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