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Published August 2007 | Version Published
Journal Article Open

Origin of boundary clinopyroxenes between spinel and melilite in type B1 CAIs

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Abstract

Small (<5 μm) boundary clinopyroxenes (b-cpx) on spinel (sp) inclusions in melilite (mel) are ubiquitous in the type B1 CAIs. B-cpx on sp in high-Åk mel in the core of the inclusion could be explained by crystallization, either initial or during remelting. However, b-cpx on sp inclusions in low-Åk mantle mel are not readily explained in this way because mantle mel crystallized and incorporated b-cpx long before the appearance of clinopyroxene (cpx) in the crystallization sequence. To further constrain the crystallization and/or alteration processes, and to test the hypothesis that b-cpx were formed from melt inclusions, we examined the sp/mel interface of four sp in Leoville and Allende CAIs using FIB/TEM.

Additional Information

© 2007 The Meteoritical Society. Article first published online: 26 Jan. 2010.

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Published - Burnett_2007pA121.pdf

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Identifiers

Eprint ID
36702
DOI
10.1111/j.1945-5100.2007.tb00601.x
Resolver ID
CaltechAUTHORS:20130131-093304456

Dates

Created
2013-01-31
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Updated
2023-10-23
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Division of Geological and Planetary Sciences (GPS)