Petrography and mineral chemistry of 4 carbonaceous chondrites from the Grove Mountains, Antarctica

Deqiu, Dai and Daode, Wang (2009) Petrography and mineral chemistry of 4 carbonaceous chondrites from the Grove Mountains, Antarctica. Advances in Polar Science, 20 (2). pp. 166-171.

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Abstract

Petrography and mineral chemistry of four carbonaceous chondrites (GRV 020017, GRV 020025, GRV 021579, GRV 022459) collected from the Grove Mountains (GRV), Antarctica, were reported here. All four chondrites are unequilibrated, as indicated by well shaped chondrules and the chemical variations of olivine and low-C a pyroxene. The modal abundance ratio of matrix / chondrule are 2 (GRV 020017), 2.8 (GRV 020025), 1.2 (GRV 021579), 1 (GRV 022459). GRV 022459 has the largest chondrules(0.6-2.0mm). A total of 30 Ca-A l-rich inclusions were found in the four meteorites. Most inclusions were highly altered, with abundant phyllosilicates in the inclusions of GRV 020017 and GRV 020025. On the base of petrography and mineral chemistry, these chondrites are classified as CM2 (GRV 020017 and 020025), CO3(GRV 021579) and CV3(GRV 022459).

Item Type:	Article
Related URLs:
Keywords:	carbonaceous chondrites, petrography and mineral chemistry, CA I, classification, Antarctica
Subjects:	Natural Environment > Space
Organizations:	Unspecified
Date Deposited:	08 Sep 2023 12:27
URI:	http://library.arcticportal.org/id/eprint/2381

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