%0 Journal Article
%T Petrology and mineral chemistry of new ureilites found in Grove Mountains, Antarctica<br>
%A Bingkui Miao
%A Yangting Lin
%A Guiqin Wang
%A Daode Wang
%A Ziyuan Ouyang
%A <br>
%J 自然科学进展
%D 2008
%I 
%X Petrography and mineral chemistry of two new ureilites, GRV021512 and GRV022931, from the Grove Mountains, Antarctica, are reported in this paper. GRV 021512 exhibits a typical ureilite texture, and consists of 48.3% olivine, 9.4% pigeonite and 38.1% carbonaceous interstitial material and/or reduction product. GRV 022931 has a cataclastic porphyritic texture, and consists of 19.1% olivine and 14.1% pigeonite embedded in 66.3% carbonaceous interstitial material and/or reduction product. The coarse-grained olivine and pigeonite in both meteorites have homogeneous cores, and they are FeO-rich within the range of the ferroan subgroup (subgroup I) of olivine-pigeonite ureilites. All olivine grains of the meteorites show reduction zones along boundaries and cracks. Abundant diamond coexists with graphite as graphite-rich patches and veins in the carbonaceous interstitial material. Petrogenesis of both meteorites and origin of diamond are discussed.
%K meteorite
%K achondrite
%K ureilite
%K diamond
%K Antarctica<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=504AF8C1E5476CA7C4EC9DF6FEAC14AC&aid=B0D53AD43F283D0DFE7D1B6AF24EE2D4&yid=67289AFF6305E306&vid=13553B2D12F347E8&iid=E158A972A605785F&sid=6D6BFCF0101BC091&eid=78976D931AD1540F&journal_id=1002-008X&journal_name=自然科学进展&referenced_num=0&reference_num=0