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Grossular in the Allende /Type III carbonaceous/ meteorite (1974)

Fuchs, L. H.

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Publication Date: 2011-08-16

Description: Grossular garnet has been observed in several white inclusions in the Allende meteorite. Compositions range from Gro(95)Py(5) to Gro(88)Py(12) in five inclusions. Its mottled appearance indicates that it crystallized from a glass of near-grossular composition and not by a solid-state reaction between wollastonite, anorthite, and melilite. These grossular-bearing inclusions either condensed directly as metastable liquids from the solar nebula or, if initial solid condensates were liquefied, by some subsequent heating process. In either case, a prolonged residence time in a thermal blanket appears necessary to effect crystallization of the grossular.

Keywords: SPACE SCIENCES

Type: Meteoritics; 9; Mar. 30

Format: text

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