A New Martian Meteorite from Antarctica:Grove Mountains (GRV) 020090  

作　　者：MIAOBingkui OUYANGZiyuan WANGDaode JUYitai WANGGuiqin LINYangting 

机构地区：[1]InstituteofGeologyandGeophysics,ChineseAcademyofSciences,Beijing100029 [3]NationalAstronomicalObservatories,ChineseAcademyofSciences,Beijing100012 [4]GuangzhouInstituteofGeochemistry,ChineseAcademyofsciences,Guangzhou,Guangdong510640 [5]TheSecondBureauofChinaExploration＆EngineeringBureau,Fuzhou,Fujian350001

出　　处：《Acta Geologica Sinica(English Edition)》2004年第5期1034-1041,共8页地质学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China(Grant No.40232026);the pilot project of knowledge innovation program of the Chinese Academy of Sciences(Grant No.KZCX3-SW-123).

摘　　要：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.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.

关 键 词：METEORITE LHERZOLITE SHERGOTTITE achondrite Mars ANTARCTICA 

分 类 号：P185.83[天文地球—天文学] P941.61