GRV 020043-A Special Transition Chondrite Between E and H Group
详细信息
- 责任者：Li Shijie (Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Wang Shijie
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(1)
- 关键词：球粒陨石 ; chondrites ; 南极洲 ; Antarctica
- 页码：p.129-135
- 图表：4 illus., 4 tables, 18 refs.
- 分类号：0100
- 出版序号：20120001
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
Grove Mountains (GRV) 020043 is a special chondrite, which has the same mineral assemblage as ordinary chondrite, but it has its own mineral compositions beyond those of the ordinary chondrites. The stone is composed of Low-Ca pyroxene (40 vol%), olivine (24 vol%), diopside (8 vol%), plagioclase (10 vol%), troilite (4 vol%), Fe-Ni alloy (14 vol%), and trace of chromite and apatite. The silicates have homogeneous compositions, e.g. olivine (Fa10.4-12.4, average Fa11.0) and Low-Ca pyroxene (Fs10.1-11.6, average Fs10.9), diopside (Wo46.1-47.1En49.0-49.2Fs3.8-4.4, average Wo46.6En49.3Fs4.0), plgioclase (Ab55.7-72.5Or2.1-5.0An24.0-42.1, average Ab67.6Or3.4An29.0). Based on its mineral compositions, olivine model abundance and oxidation intensity of GRV 020043 are restricted between E and H groups. The chondrite is classified as a transition chondrite between E and H group.
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