中国科学院知识创新项目
南极格罗夫山陨石GRV 020043是一块特殊的球粒陨石，虽与普通球粒陨石有着相似的矿物组合，但矿物成分超出普通球粒陨石范围。主要矿物组合及其模式含量（vol％）是：斜方辉石40、橄榄石24、透辉石8、斜长石10、 Fe-Ni合金14、陨硫铁4 vol%、及少量铬铁矿和磷灰石。主要组成矿物成分均一，如斜方辉石（Fs10.1-11.6，平均Fs10.9）、橄榄石（Fa10.4-12.4，平均Fa11.0）、透辉石（Wo46.1-47.1En49.0-49.6Fs3.8-4.4，平均Wo46.6En49.3Fs4.0）、斜长石（Ab55.7-72.5Or2.1-5.0An24.0-42.1,平均 Ab67.6Or3.4An29.0）等。该陨石球粒轮廓清晰结构完整，球粒丰度37vol％，基质具有中等重结晶，岩石类型属于4型。根据矿物成分判断， GRV 020043陨石的氧化程度和橄榄石含量介于E群和H群之间，故将该陨石划分为E/H过渡型球粒陨石。
Grove Mountains （GRV） 020043 is a special chondrite which has the same mineral assemblage of ordinary chondrite，but has its mineral compositions beyond the ordinary chondrites. The stone is composed of Low-Ca pyroxene(40 vol%), olivine(24vol%), diopside(8 vol%), plagioclase(10vol%) ,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). Some chondrules in this meteorite are well defined with sharp edges. The chondrules aboundence is 37 vol%. The matrix of the meteorite is moderately recrystallized. Its petrologic type is 4. Consideration to its oxidation state, olivine model aboundence and silicates’ chemical composition, this chondrite classed as a transition chondrite between E and H group.
李世杰,王世杰,刘燊,李雄耀,唐红,李芃.2011.南极格罗夫山陨石GRV 020043—一个特殊的E/H过渡型球粒陨石[J].地质学报,85(1):129-135.
Li Shijie, Wang Shijie, Liu Shen, Li Xiongyao, Tang Hong, Li Peng.2011. GRV 020043—A Special Transition Chondrite between E and H Group[J]. Acta Geologica Sinica,85(1):129-135.
