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Refractory inclusions in the Murchison meteorite (1983)

Grossman, L. ; Bar-Matthews, M. ; Olsen, E. ; [et al.]

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Publication Date: 2019-06-28

Description: Although melilite-rich and feldspathoid-bearing inclusions have been revealed in the Murchison C2 chondrite by mineralogical and petrographic studies, none of these is identical to the inclusions found to date in Allende. Each type of inclusion is characterized by a different suite of alteration products and/or rim layers from all the other types, indicating modification of the inclusions in a wide range of different physicochemical environments after their primary crystallization. All of these inclusions contain some iron-free rim phases which could not have formed by reaction of the inclusions with fluids in the Murchison parent body, because the latter would presumably have been rich in oxidized iron.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: Geochimica et Cosmochimica Acta (ISSN 0016-7037); 47; April 19

Format: text

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