Petrology and mineralogy of the Grove Mountains(GRV)024237 ureilite from Antarctica

doi:10.3724/SP.J.1084.2010.00375

Abstract

Abstract:

GRV024237 was found at the No.4 moraine, Grove Mountains, Antarctica in the 19th Chinese Antarctic Research Expedition(CHINARE). GRV024237 consists of granular assemblage of olivine(60vol%), pigeonite(30vol%), the grain boundaries are black and filled by opaque minerals(10 vol%). 120°junctions are common. The chemical compositions of olivine are obviously zonal distribution. The values of olivine Fa are varied between 6.2 and 16.77 from the grain’s rim to core. However, the Fs of pigeonite are quite homogenous, which are between 14.0 and 15.5. The opaque minerals are black carbonaceous material, troilite and Fe-Ni metal. Based on our study, GRV024237 is a monomict ureilite, which is suffered light shock metamorphism and experienced partial melting.

Key words: genesis

CLC Number:

References

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