GRV 051523:A new eucrite

刘焘; 林杨挺; 胡森; 冯璐

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GRV 051523:A new eucrite

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Grove Mountains(GRV)051523 is a newly identified eucrite,consisting mainly of coarse-grained pyroxene(62.9 vol%)and plagioclase(34.2 vol%),with less abundant opaque minerals(2.7 vol%),minor silica and tiny FeO-rich olivine(Fa75).Coarse-grained pyroxenes show exsolution of augite lamellae in pigeonite or vice versa.Width of most exsolution lamellae in pyroxenes is 1-3 μm.Opaque minerals are mainly chromite,ilmenite and sulfides.The meteorite was heavily shocked,as indicated by breccias and melt veins.Coarse-grained pyroxenes commonly contain abundant tiny or needle-like chromite inclusions with orientation,probably due to heavy shock events.Pyroxenes in various petrographic occurrences exhibit highly homogeneous compositions,indicating that GRV 051523 experienced intense thermal metamorphism in the parent asteroid 4 Vesta.GRV 051523 is classified as Type 5-6.This new eucrite will have additional constraints on chemical composition,magmatic differentiation,multi-stage shock and thermal history of Vesta.

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来源
《极地科学进展：英文版》 |2009年第2期|200-208|共9页
作者
刘焘; 林杨挺; 胡森; 冯璐;
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作者单位

Guangzhou Institute of Geochemistry;

Chinese Academy of Science;

Graduate School of Chinese Academy of Sciences;

Key Laboratory of the Study of Earth's Deep Interior;

Institute of Geology and Geophysics;

Chinese Academy of Science;

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原文格式 PDF
正文语种 chi
中图分类南极;陨星;
关键词
南极; 不透明矿物; 格罗夫山; 冲击事件; 化学成分; 岩浆分异; 铬铁矿; 灶神星;

机译：南极;不透明矿物;格罗夫山;冲击事件;化学成分;岩浆分异;铬铁矿;灶神星;

GRV 051523:A new eucrite

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