The noble gas concentrations of the Martian meteorites GRV 99027 and paired NWA 7906/NWA 7907

doi:10.1111/maps.12950

	The noble gas concentrations of the Martian meteorites GRV 99027 and paired NWA 7906/NWA 7907
	Stephenson, Peter C.1; Lin, Yangting 2; Leya, Ingo 1
刊名	METEORITICS & PLANETARY SCIENCE
	2017-12-01
卷号	52 期号:12 页码:2505-2520
ISSN号	1086-9379
DOI	10.1111/maps.12950
文献子类	Article
英文摘要	Here we present the isotopic concentrations of He, Ne, Ar, Kr, and Xe for the three Martian meteorites, namely Grove Mountains 99027 (GRV 99027), Northwest Africa 7906 (NWA 7906), and Northwest Africa 7907 (NWA 7907). The cosmic ray exposure (CRE) age for GRV 99027 of 5.7 +/- 0.4Ma (1 sigma) is consistent with CRE ages for other poikilitic basaltic shergottites and suggests that all were ejected in a single event similar to 5.6Ma ago. After correcting for an estimated variable sodium concentration, the CRE ages for NWA 7906 and NWA 7907 of 5.4 +/- 0.4 and 4.9 +/- 0.4Ma (1 sigma), respectively, are in good agreement with the CRE age of similar to 5Ma favored by Cartwright etal. (2014) for NWA 7034. The data, therefore, support the conclusion that all three basaltic regolith breccias are paired. The Ar-40 gas retention age for NWA 7907 of similar to 1.3Ga is in accord with Cartwright etal. (2014). For NWA 7906, we were unable to determine a Ar-40 gas retention age. The He-4 gas retention ages for NWA 7906 and 7907 are in the range of 200Ma and are much shorter than the Ar-40 gas retention age of NWA 7907, indicating that about 86-88% of the radiogenic He-4 has been lost. The Kr and Xe isotopic concentrations in GRV 99027 are composed almost exclusively of Martian interior (MI) gases, while for NWA 7906 and NWA 7907, they indicate gases from the MI, elementally fractionated air, and possibly Martian atmosphere.
WOS关键词	RAY EXPOSURE AGE ; SNC METEORITES ; CHEMICAL-COMPOSITION ; PRODUCTION-RATES ; EJECTION TIMES ; SHERGOTTITE ; CHASSIGNY ; ACHONDRITES ; ATMOSPHERE ; NEON
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY
WOS记录号	WOS:000416937300004
资助机构	Swiss National Science Foundation(SNF 200021_159562) ; Swiss National Science Foundation(SNF 200021_159562) ; National Natural Science Foundation of China(41430105) ; National Natural Science Foundation of China(41430105) ; Swiss National Science Foundation(SNF 200021_159562) ; Swiss National Science Foundation(SNF 200021_159562) ; National Natural Science Foundation of China(41430105) ; National Natural Science Foundation of China(41430105) ; Swiss National Science Foundation(SNF 200021_159562) ; Swiss National Science Foundation(SNF 200021_159562) ; National Natural Science Foundation of China(41430105) ; National Natural Science Foundation of China(41430105) ; Swiss National Science Foundation(SNF 200021_159562) ; Swiss National Science Foundation(SNF 200021_159562) ; National Natural Science Foundation of China(41430105) ; National Natural Science Foundation of China(41430105)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82334]
专题	中国科学院地质与地球物理研究所
通讯作者	Stephenson, Peter C.
作者单位	1.Univ Bern, Inst Phys, Space Sci & Planetol, CH-3012 Bern, Switzerland 2.Chinese Acad Sci, Key Lab Earth & Planetary Phys, Inst Geol & Geophys, Beijing 100864, Peoples R China
推荐引用方式 GB/T 7714	Stephenson, Peter C.,Lin, Yangting,Leya, Ingo. The noble gas concentrations of the Martian meteorites GRV 99027 and paired NWA 7906/NWA 7907[J]. METEORITICS & PLANETARY SCIENCE,2017,52(12):2505-2520.
APA	Stephenson, Peter C.,Lin, Yangting,&Leya, Ingo.(2017).The noble gas concentrations of the Martian meteorites GRV 99027 and paired NWA 7906/NWA 7907.METEORITICS & PLANETARY SCIENCE,52(12),2505-2520.
MLA	Stephenson, Peter C.,et al."The noble gas concentrations of the Martian meteorites GRV 99027 and paired NWA 7906/NWA 7907".METEORITICS & PLANETARY SCIENCE 52.12(2017):2505-2520.