Zircon U-Pb and molybdenite Re-Os dating of the Liang-shan Mo deposit in Xinyu City, Jiangxi Province

WU Junjie; CHEN Zhengle; CHEN Ruili; PAN Jiayong; HAN Fengbin; FU Lei; SHEN Tao

2017 Vol. 36, No. 8

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WU Junjie, CHEN Zhengle, CHEN Ruili, PAN Jiayong, HAN Fengbin, FU Lei, SHEN Tao. Zircon U-Pb and molybdenite Re-Os dating of the Liang-shan Mo deposit in Xinyu City, Jiangxi Province[J]. Geological Bulletin of China, 2017, 36(8): 1407-1416.

Citation:

WU Junjie, CHEN Zhengle, CHEN Ruili, PAN Jiayong, HAN Fengbin, FU Lei, SHEN Tao. Zircon U-Pb and molybdenite Re-Os dating of the Liang-shan Mo deposit in Xinyu City, Jiangxi Province[J]. Geological Bulletin of China, 2017, 36(8): 1407-1416.

Zircon U-Pb and molybdenite Re-Os dating of the Liang-shan Mo deposit in Xinyu City, Jiangxi Province

1.
Geological Survey of Anhui Province, Hefei 230001, Anhui, China
2.
East China University of Technology, Nanchang 330013, Jiangxi, China
3.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
4.
Jiangxi Central South Exploration Institute of Geology and Mineral Resources, Nanchang 330013, Jiangxi, China

Received Date: 18 July 2016

Revised Date: 27 December 2016

Publish Date: 25 August 2017

Abstract

Abstract

The Liangshan molybdenum deposit was found in the western region of the Wugongshan-Qianshan subzone a few years ago. Based on an analysis of the mineralization features of the deposit, the authors determined LA-ICP-MS zircon U-Pb ages for the ore-bearing rocks in the Liangshan deposit. U-Pb dating of zircon by LA-ICP-MS reveals that the intrusion age of the Liang-shan porphyry granite is 168.2±2.3Ma. The ¹⁸⁷Re and ¹⁸⁷Os values of molybdenum from the molybdenum deposit were determined by the Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Re-Os isochron of molybdenum suggests that the metallogenic epoch of the deposit is 168.9±1.4Ma, indicating that this deposit had a close relation with its host rocks, the magmatic activity had a close relationship with ore-bearing hydrothermal activities, and magmatic activity was an important factor for the formation of the Li-angshan molybdenum deposit. The metallogenic time of the Liangshan molybdenum deposit is consistent with south China first stage large-scale polymetallic mineralization of Yanshanian period (170Ma). The Liangshan molybdenum deposit was formed in the same regional metallogenic setting and resulted from regional tectonic magmatism, as a part of the South China Yanshanian mineralization.
- zircon U-Pb age /
- molybdenite Re-Os age /
- porphyry molybdenum deposit /
- Liangshan /
- Qinhang metallogenic belt

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References

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