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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 12    December 2019

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Muscovite 40Ar-39Ar age and its geological significance in Zhuxi W(Cu) deposit, northeastern Jiangxi
OUYANG Yong-peng(欧阳永棚)1, WEI Jin(魏锦)1, LU Yi(卢弋)1, ZHANG Wei(章伟)2,YAO Zai-yu(尧在雨)1, RAO Jian-feng(饶建锋)1, CHEN Guo-hua(陈国华)1, PAN Xiao-fei(潘小菲)3

1. No. 912 Geological Surveying Team, Jiangxi Bureau of Geology and Mineral Exploration and Development, Yingtan 335001, China;
2. Faculty of Earth Resources and Collaborative Innovation Center for Scarce and Strategic Mineral Resources, China University of Geosciences, Wuhan 430074, China;
3. Institute of Geology, Chinese Academy of Geological Science, Beijing 100037, China

Abstract:The Zhuxi W(Cu) skarn deposit, the world’s largest tungsten deposit is newly discovered in Jingdezhen city, northeastern Jiangxi province, China. It mainly occurs near the contact zone between the Yanshanian granites and the Late Paleozoic carbonate rocks. Three types of mineralization including skarn type, altered granite type and quartz vein-veinlet type orebodies have been observed. In this study, the 40Ar-39Ar age of hydrothermal muscovite coexisting with copper mineralization in the altered granite type orebody formed near the unconformity interface is determined by step-heating technology using CO2 laser. The plateau age, isochron age, and inverse isochron age of muscovite are (147.39±0.94) Ma, (147.2±1.5) Ma, and (147.1±1.5) Ma, respectively. These ages are almost identical to the ages of ore-related granite and other mineralization types in the Zhuxi W(Cu) deposit, indicating that the Cu mineralizations occurred at the shallow depth and near the unconformity interface are contemporaneous during the Late Jurassic. This further suggested that the acompanied W and Cu mineralization in the Zhuxi W(Cu) deposit which may be controlled by the magma source is enriched in both W and Cu.

 

Key words: Muscovite; 40Ar-39Ar age; altered granite-type orebody; Zhuxi W(Cu) deposit; northeastern Jiangxi

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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