Diagenetic and Metallogenic Geochronological Characteristics of Zhushahong Porphyry Copper Deposit in Dexing Area of Jiangxi and Its Implications(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2016年第01期
- Page:
- 55-65
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Diagenetic and Metallogenic Geochronological Characteristics of Zhushahong Porphyry Copper Deposit in Dexing Area of Jiangxi and Its Implications
- Author(s):
- XIAO Rong; LI Xiao-feng; WANG Cui-yun; WEI Xing-lin; BAI Yan-ping
- 1. Hunan Institute of Geological Survey, Changsha 410116, Hunan, China; 2. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 3. College of Earth Sciences, Guilin University of Technology, Guilin 541004, Guangxi, China; 4. Jiangxi Bureau of Nonferrous Metal Geological Exploration, Nanchang 330025, Jiangxi, China
- Keywords:
- porphyry copper deposit; geochronology; grandiorite porphyry; apatite; zircon; U-Pb age; Dexing area; Jiangxi
- PACS:
- P597+.3;P618.41
- DOI:
- -
- Abstract:
- Dexing porphyry copper deposit in Jiangxi is one of the largest in the eastern of China. It is composed of Zhushahong, Tongchang and Fujiawu deposits. Based on the petrographic investigation of drill core samples, SHRIMP zircon U-Pb dating and ID-TIMS apatite U-Pb dating for ore-bearing granodiorite porphyry from Zhushahong porphyry copper deposit in Dexing area were presented. The results show that SHRIMP zircon U-Pb age of granodiorite porphyry is (171.3±1.7)Ma with the mean standard weighted deviation (MSWD) of 1.4; ID-TIMS apatite U-Pb age with hydrothermal alteration is (170.6±1.0)Ma with the MSWD of 0.49. The above ages indicate that the emplacement of ore-bearing porphyry from Zhushahong porphyry copper deposit and the mineralization of Cu-Mo develop in Middle Jurassic and are nearly contemporaneous; there is short magmatic-hydrothermal evolution process from magma emplacement to hydrothermal mineralization.
Last Update: 2016-01-30