Petrology, mineralogy, porosity, and cosmic‐ray exposure history of Huaxi ordinary chondrite
Shijie Li;  Shijie Wang;  Ingo Leya;  Yang Li;  Xiongyao Li;  Thomas Smith
刊名Meteoritics & Planetary Science
2017
卷号52期号:5页码:937–948
英文摘要

A meteorite fall was heard and collected on July 13, 2010 at about 18:00 (local time) in the Shibanjing village of the Huaxi district of Guiyang, Guizhou province, China. The total mass of the fall is estimated to be at least 1.6 kg; some fragments are missing. The meteorite consists mainly of olivine, low‐Ca pyroxene, high‐Ca pyroxene, plagioclase, kamacite, taenite, and troilite. Minor phases include chromite and apatite. Various textural types of chondrules exist in this meteorite: most chondrule textures can be easily defined. The grain sizes of secondary plagioclase in this meteorite range from 2 to 50 μm. The chemical composition of olivine and low‐Ca pyroxene are uniform; Fa in olivine and Fs in low‐Ca pyroxene are, respectively, 19.6 ± 0.2 and 17.0 ± 0.3 (mole%). Huaxi has been classified as an H5 ordinary chondrite, with a shock grade S2, and weathering W0. The weak shock features, rare fractures, and the high porosity (17.6%) indicates that Huaxi is a less compacted meteorite. The preatmospheric radius of Huaxi is ~11 cm, corresponding to ~21 kg. The meteorite experienced a relatively short cosmic‐ray exposure of about 1.6 ± 0.1 Ma. The 4He and 40Ar retention ages are older than 4.6 Ga implying that Huaxi did not degas after thermal metamorphism on its parent body.

语种英语
内容类型期刊论文
源URL[http://ir.gyig.ac.cn/handle/42920512-1/8357]  
专题地球化学研究所_月球与行星科学研究中心
作者单位1.Physikalisches Institut, Universit€at Bern, Switzerland
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
3.Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
推荐引用方式
GB/T 7714
Shijie Li;Shijie Wang;Ingo Leya;Yang Li;Xiongyao Li;Thomas Smith. Petrology, mineralogy, porosity, and cosmic‐ray exposure history of Huaxi ordinary chondrite[J]. Meteoritics & Planetary Science,2017,52(5):937–948.
APA Shijie Li;Shijie Wang;Ingo Leya;Yang Li;Xiongyao Li;Thomas Smith.(2017).Petrology, mineralogy, porosity, and cosmic‐ray exposure history of Huaxi ordinary chondrite.Meteoritics & Planetary Science,52(5),937–948.
MLA Shijie Li;Shijie Wang;Ingo Leya;Yang Li;Xiongyao Li;Thomas Smith."Petrology, mineralogy, porosity, and cosmic‐ray exposure history of Huaxi ordinary chondrite".Meteoritics & Planetary Science 52.5(2017):937–948.
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