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Muscovite Ar-40/Ar-39 Age and H-O-S Isotopes of the Shimensi Tungsten Deposit (Northern Jiangxi Province, South China) and Their Metallogenic Implications
Wen-Feng Wei;  Bing Yan;  Neng-Ping Shen;  Lei Liu;  Yong Zhang;  Xin-Kui Xiang
2017
Source PublicationMinerals
Volume7Issue:9Pages:162-
Abstract

The Shimensi deposit (Northern Jiangxi, South China) is a recently discovered super-large tungsten deposit. Muscovite Ar-40/Ar-39 dating yielded a plateau age of 145.7 +/- 0.9 Ma, with normal and inverse isochronal ages being 145.4 +/- 1.4 Ma and 145.3 +/- 1.4 Ma, respectively. The muscovite Ar-40/Ar-39 age, which can represent the mineralization age, coincides well with the published zircon U-Pb ages (143-148 Ma) of the ore-hosting granites, which indicates that the tungsten mineralization was syn-magmatic. The new age reported here confirms that the Shimensi tungsten deposit is part of a large Early Cretaceous (147-136 Ma) tungsten-polymetallic belt in South China. Measured and calculated sulfur isotopic compositions (delta S-34(minerals) = -3.0 parts per thousand to 1.1 parts per thousand, average -1.3 parts per thousand; delta S-34(H2S) = -4.5 parts per thousand to + 1.2 parts per thousand, average -1.8 parts per thousand) of the Shimensi ore-forming fluids indicate that the sulfur was mainly magmatic-derived. The calculated and measured oxygen and hydrogen isotopic compositions (delta O-18(H2O) = 4.1 parts per thousand to 6.7 parts per thousand, delta D = -62.7 parts per thousand to 68 parts per thousand) of the ore-forming fluids indicate a dominantly magmatic source with a meteoric water input. Oxygen isotopic modelling of the boiling/mixing processes indicates that the Shimensi tungsten mineralization was caused mainly by fluid mixing of magmatic hydrothermal fluid with meteoric water.

Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8036
Collection矿床地球化学国家重点实验室
Affiliation1.Institute of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
3.School of Earth Sciences, East China University of Technology, Nanchang 330013, China
4.No. 916 Geological Party, Jiangxi Bureau of Geology & Mineral Exploration, Jiujiang 332100, China
Recommended Citation
GB/T 7714
Wen-Feng Wei;Bing Yan;Neng-Ping Shen;Lei Liu;Yong Zhang;Xin-Kui Xiang. Muscovite Ar-40/Ar-39 Age and H-O-S Isotopes of the Shimensi Tungsten Deposit (Northern Jiangxi Province, South China) and Their Metallogenic Implications[J]. Minerals,2017,7(9):162-.
APA Wen-Feng Wei;Bing Yan;Neng-Ping Shen;Lei Liu;Yong Zhang;Xin-Kui Xiang.(2017).Muscovite Ar-40/Ar-39 Age and H-O-S Isotopes of the Shimensi Tungsten Deposit (Northern Jiangxi Province, South China) and Their Metallogenic Implications.Minerals,7(9),162-.
MLA Wen-Feng Wei;Bing Yan;Neng-Ping Shen;Lei Liu;Yong Zhang;Xin-Kui Xiang."Muscovite Ar-40/Ar-39 Age and H-O-S Isotopes of the Shimensi Tungsten Deposit (Northern Jiangxi Province, South China) and Their Metallogenic Implications".Minerals 7.9(2017):162-.
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