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A New Martian Meteorite from Antarctica: Grove Mountains (GRV) 020090
Author(s) -
Bingkui MIAO,
Ziyuan OUYANG,
Daode WANG,
Yitai JU,
Guiqin WANG,
Yangting LIN
Publication year - 2004
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2004.tb00759.x
Subject(s) - pigeonite , augite , meteorite , geology , troilite , geochemistry , chromite , pyroxene , olivine , achondrite , martian , astrobiology , ilmenite , mars exploration program , plagioclase , chondrite , paleontology , physics , quartz
Reported in this paper are the petrology and mineral chemistry of GRV 020090, the second Martian meteorite collected from the Grove Mountains, Antarctica. This meteorite, with a mass of 7.54 g, is completely covered by a black and glazy fusion crust. It has two distinct textural regions. The interstitial region is composed of euhedral grains of olivine, pigeonite, and anhedral interstitial maskelynite, with minor chromite, augite, phosphates and troilite. The poikilitic region consists of three clasts of pyroxenes, each of which has a pigeonite core and an augite rim. A few grains of subhedral to rounded olivine and euhedral chromite are enclosed in the pyroxene oikocrysts. GRV 020090 is classified as a new member of lherzolitic shergottites based on the modal composition and mineral chemistry. This work will shed light on the composition of Martian crust and magmatism on the Mars.