Cosmic-ray exposure histories of two Antarctic meteorites from Chinese collections and the Guangmingshan and Zhuanghe chondrites

doi:10.1360/03yd0060

	Cosmic-ray exposure histories of two Antarctic meteorites from Chinese collections and the Guangmingshan and Zhuanghe chondrites
	Wang, DD ; Lin, YT ; Liu, XH ; Ju, YT
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2003-12-01
卷号	46 期号:12 页码:1236-1240
关键词	chondrite noble gas cosmic-ray exposure age
ISSN号	1006-9313
DOI	10.1360/03yd0060
文献子类	Article
英文摘要	Concentrations of noble gases of two Antarctic meteorites (GRV 98002, 98004) from Chinese collections, and the Guangmingshan and Zhuanghe chondrites were measured. Based on the petrography and mineralogy of these meteorites, and production rates of the cosmogenic nuclides, we calculated cosmic-ray exposure and gas retention ages of the four chondrites. Exposure ages of the four chondrites are 0.052 Ma +/- 0.008 Ma (GRV 98004, H5), 17.0 Ma +/- 2.5 Ma (GRV98002, L5), 3.8 Ma +/- 0.6 Ma (Zhuanghe, H5), and 68.9 Ma +/- 10 Ma (Guangmingshan, H5), respectively. The exposure age of GRV 98004 is the lowest value of Antarctic meteorites reported up to date; while that of Guangmingshan is higher than other Chinese meteorites of H-group. Both GRV 98002 and Zhuanghe have low He-4 concentrations, probably due to shock effects or solar heating at orbits with small perihelion distances during cosmic-ray exposure. On the other hand, losses of cosmogenic He-3 and He-4 are correlated with both GRV 98002 and Guangmingshan.
WOS关键词	AGES ; GAS
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000186314200004
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78709]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang, DD
作者单位	1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, DD,Lin, YT,Liu, XH,et al. Cosmic-ray exposure histories of two Antarctic meteorites from Chinese collections and the Guangmingshan and Zhuanghe chondrites[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2003,46(12):1236-1240.
APA	Wang, DD,Lin, YT,Liu, XH,&Ju, YT.(2003).Cosmic-ray exposure histories of two Antarctic meteorites from Chinese collections and the Guangmingshan and Zhuanghe chondrites.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,46(12),1236-1240.
MLA	Wang, DD,et al."Cosmic-ray exposure histories of two Antarctic meteorites from Chinese collections and the Guangmingshan and Zhuanghe chondrites".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 46.12(2003):1236-1240.