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Molybdenite Re–Os and muscovite 40Ar/39Ar dating of the Xihuashan tungsten deposit, central Nanling district, South China
Rui-Zhong Hu;  Wen-Feng Wei;  Xian-Wu Bi;  Jian-Tang Peng;  You-Qiang Qi;  Li-Yan Wu;  You-Wei Chen
2012
Source PublicationLithos
Volume150Pages:111–118
Abstract

The Xihuashan tungsten deposit in the central Nanling region, South China, is an important vein-type ore deposit hosted in Cambrian strata and Mesozoic granitic intrusions. Wolframite and molybdenite are the principal ore minerals. The gangue minerals are mainly quartz and muscovite. Wolframite and molybdenite are products of the first stage hydrothermal activity, whereas muscovite formed dominantly at the second stage. Molybdenite Re–Os and muscovite 40Ar/39Ar dating have been carried out to investigate the age of mineralization. Re–Os isotopic dating for molybdenite associated with wolframite yield a precise, wellconstrained isochron age of 157.8±0.9 Ma (MSWD=1.5). Ar–Ar isotopic analyses of muscovite yield a plateau age of 152.8±1.6 Ma, in agreement with an inverse isochron age of 152.8±1.6 Ma, which is ~5 mys younger than the Re–Os age. The molybdenite Re–Os age is interpreted as the age of tungsten mineralization. This age coincides well with the zircon U–Pb age of the host granitic intrusion reported previously. The ~5 mys difference between molybdenite Re–Os and muscovite 40Ar/39Ar ages probably represents the duration of hydrothermal activity. The results show that the Xihuashan tungsten deposit is one of many important tungsten–tin deposits formed during 150 to 160 Ma associated with large-scale lithospheric extension in South China.

KeywordMolybdenite Re–os Dating mica Ar–ar Dating tungsten Mineralization nanling china
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8700
Collection矿床地球化学国家重点实验室
AffiliationState Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Recommended Citation
GB/T 7714
Rui-Zhong Hu;Wen-Feng Wei;Xian-Wu Bi;Jian-Tang Peng;You-Qiang Qi;Li-Yan Wu;You-Wei Chen. Molybdenite Re–Os and muscovite 40Ar/39Ar dating of the Xihuashan tungsten deposit, central Nanling district, South China[J]. Lithos,2012,150:111–118.
APA Rui-Zhong Hu;Wen-Feng Wei;Xian-Wu Bi;Jian-Tang Peng;You-Qiang Qi;Li-Yan Wu;You-Wei Chen.(2012).Molybdenite Re–Os and muscovite 40Ar/39Ar dating of the Xihuashan tungsten deposit, central Nanling district, South China.Lithos,150,111–118.
MLA Rui-Zhong Hu;Wen-Feng Wei;Xian-Wu Bi;Jian-Tang Peng;You-Qiang Qi;Li-Yan Wu;You-Wei Chen."Molybdenite Re–Os and muscovite 40Ar/39Ar dating of the Xihuashan tungsten deposit, central Nanling district, South China".Lithos 150(2012):111–118.
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