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Zircon U-Pb Dating of Ore-Bearing Granite-Porphyry Vein in Western Huangyangshan Gold Deposit, Eastern Junggar and Its Geological Significance

LU Yan-ming1|2, ZHANG Yu-jie2, PAN Mao1, LIU Yi-fei3,XU Bin4|5, CHAO Yin-yin2, ZHANG Dong2, FAN Jun-jie2, CHEN Xiao-wu2, PAN Ai-jun2|4   

  1. 1.School of Earth and Space Sciences, Peking University,Beijing 100871,China;
    2.Gold Geological Institute of CAPF, Langfang, Hebei 065000,China;
    3.Institute of Mineral Resources,CAGS,Beijing 100037,China;
    4.School of the Earth Sciences and Resources,China University of Geosciences, Beijing 100083,China;
    5.No.1 Gold Brigade of CAPF, Haerbin 150086,China
  • Received:2010-03-20 Online:2010-07-26 Published:2010-07-26

Abstract:

The western Huangyangshan gold deposit, located in the middle of Karameili gold metallogenic belt, Eastern Junggar, is consisted of four gold ore bodies, all they are mineralized granite porphyry veins which are alkaline and K-rich. Three granite porphyry samples were collected, and CL characteristics of zircons from ore-bearing granite porphyry samples suggest their magmatic origin. LA-MC-ICP-MS U-Pb dating of  zircons from the ore-bearing granite porphyry veins shows that their emplacing ages are （318.4 ± 1.1）-（310.3 ± 2.6）Ma. Regional comparison indicates that there occurred two epoch of gold mineralization in Karameili area , the earlier was related to the alkaline magmatic activity and latter was  associaed with the ductile-brittle tectonic deformation. Both gold mineralization took place in post-collision orogenic collision environment.

Key words: zircon, LA-ICP-MS dating, granite porphyry, western Huangyangshan gold deposit, Karameili

CLC Number: 

  • P618.51
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