Rockforming and Oreforming Ages of the Yaogangxian Tungsten Deposit of Hunan Province

WANG Denghong; LI Huaqin; QIN Yan; MEI Yuping; CHEN Zhenghui; QU Wenjun; WANG Yanbin; CAI Hong; GONG Shuqing; HE Xiaoping

2009 Vol. 28, No. 3

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Article navigation > Rock and Mineral Analysis > 2009 > 28(3): 201-208

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WANG Denghong, LI Huaqin, QIN Yan, MEI Yuping, CHEN Zhenghui, QU Wenjun, WANG Yanbin, CAI Hong, GONG Shuqing, HE Xiaoping. Rockforming and Oreforming Ages of the Yaogangxian Tungsten Deposit of Hunan Province[J]. Rock and Mineral Analysis, 2009, 28(3): 201-208.

Citation:

Rockforming and Oreforming Ages of the Yaogangxian Tungsten Deposit of Hunan Province

1.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences
2.
Yichang Institute of Geology and Mineral Resources
3.
Graduate Department, Chinese Academy of Geological Sciences
4.
Yichang Institute of Geology and Mineral Resources
5.
Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences
6.
National Research Center for Geoanalysis
7.
Institute of Geology, Chinese Academy of Geological Sciences
8.
Yichang Institute of Geology and Mineral Resources
9.
Xiangnan Geological Team, Hunan Geology and Mineral Resources Exploration and Development Bureau
10.
Yaogangxian Tungsten Mine

Received Date: 10 February 2009

Revised Date: 16 March 2009

Publish Date: 28 June 2009

Abstract

Abstract

The Yaogangxian tungsten deposit of Hunan province is located in the central part of the Nanling EW-direction tectonic belt, interjunction of Caledonian uplift zone and Indosinian-Yanshanian hollow zone. The strata of Cambrian, Devonian, Carboniferous and Jurassic widely spread in the area with Cambrian and Devonian as the dominant ore-bearing strata. The ore body hosted in the inside and outside contact zone of the early Yanshanian granite. On the basis of geological structure, rock geochemistry, isotope chronology and other research of the deposit, the authors used SHRIMP U-Pb, Rb-Sr and Re-Os isochrone techniques to determine the ages of rockforming and oreforming in the Yaogangxian mine. The Yaogangxian granite mass and wolframite-quartz vein which hosted in inside and outside of mass contact zone was tested and the SHRIMP U-Pb age, of (170.7±2.2) Ma (95% confidence, n=12，MSWD=1.7) was obtained and the age of (175.8±4.1) Ma (95% confidence, MSWD=0.88) for the wolframitequartz vein which located in outside of mass contact zone and the age of (156±3) Ma (95% confidence, MSWD=0.20) for the wolframitequartz vein which located in inside of mass contact zone were also obtained. While the Re-Os isochron age for molybdenite was (170±5) Ma (MSWD=0.34). The results indicate the formation of the Yaogangxian tungsten deposit undergoing at least two mineralization periods, corresponding to J1/J2 and J2/J3 transition periods respectively. Furthermore, the rock-forming and ore-orming process of the deposit is featured by multi-stage and multi-phase superimposing, and the process of ore-forming is coupling with the process of rock-forming.
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- Yaogangxian /
- tungsten