H-O-S-Pb ISOTOPIC COMPONENTS OF THE LIANGSHAN MOLYBDENUM DEPOSIT IN XINYU, JIANGXI PROVINCE AND THEIR IMPLICATIONS FOR THE ORE FORMING PROCESS

WU Jun-jie; CHEN Zheng-le; FU Lei; PAN Jia-yong; HAN Feng-bin; SHEN Tao

Volume 22 Issue 2

Jun. 2016

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Article Navigation > Journal of Geomechanics > 2016 > 22(2): 325-337

WU Jun-jie, CHEN Zheng-le, FU Lei, et al., 2016. H-O-S-Pb ISOTOPIC COMPONENTS OF THE LIANGSHAN MOLYBDENUM DEPOSIT IN XINYU, JIANGXI PROVINCE AND THEIR IMPLICATIONS FOR THE ORE FORMING PROCESS. Journal of Geomechanics, 22 (2): 325-337.

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H-O-S-Pb ISOTOPIC COMPONENTS OF THE LIANGSHAN MOLYBDENUM DEPOSIT IN XINYU, JIANGXI PROVINCE AND THEIR IMPLICATIONS FOR THE ORE FORMING PROCESS

1.
East China Institute of Technology, Nanchang 330013, China
2.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

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Received: 2015-11-02
Published: 2016-06-01

Abstract

Abstract

On the basis of predecessors' research results, We study the geological characteristics of the Liangshan molybdenum deposit in Jiangxi province and test H-O-S-Pb isotopic components of the molybdenum stone samples in quartz vein systematically, and then discusse the metallogenic fluid properties as well as the source of ore-forming materials of the molybdenum deposit. The δD of the ore-forming fluids are between -61‰~-57.9‰, with the average of -59.1‰; and the δ¹⁸O_V-SMOW of the ore-forming fluid are between 7.1‰~10.5‰, with the average of 9.2‰; and the δ¹⁸O_H₂O of the ore-foring fluids are between -3.32‰~-0.52‰, with the average of -1.52‰, which indicate that the ore-forming fluid has the characteristics of magmatic water and meteoric water mixed fluid. The δ³⁴S_V-CDT of the sulfide mineral are between -1.8‰~2.6‰, with the range of 4.4‰ and the average of 1.12‰, of which the δ³⁴S_V-CDT of the pyrite are between -1.8‰~2.6‰ and the δ³⁴S_V-CDT of the molybdenite are between 0.8‰~2.3‰. The sulfur isotope values are smaller positive which show the characteristics of typical magmatic sulfur. The values of ²⁰⁶Pb/²⁰⁴Pb of the ore samples are between 17.555~19.474, and the values of ²⁰⁷Pb/²⁰⁴Pb are between 15.486~ 15.768, as well as the values of ²⁰⁸Pb/²⁰⁴Pb are between 37.942~39.943, with the μ values of 9.35~9.7 and the ω values of 37.06~38.31, as well as the Th/U values of 3.8~3.96, which indicate the ore are rich in mixed lead, and the ore-forming material sources are mixed. The Liangshan molybdenum ore should belong to the magmatic hydrothermal type and quartz vein type deposit, which is a product of the metal mineralization outbreak during the intraplate tectonic evolution of south China plate in Mesozoic.
- isotope composition,
- metallogenetic materials,
- ore-forming fluid,
- metallogenic system,
- Liangshan molybdenum deposit

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