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中南大学学报(英文版)

Journal of Central South University

Vol. 14    No. 1    February 2007

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Isotope systematics and metallogenetic age of Zhuanghe gold deposit,Liaoning province, China
WEI Jun-hao(魏俊浩), TAN Wen-juan(谭文娟), GUO Da-zhao(郭大招),TAN Jun(谭 俊), LI Yan-hua(李闫华), YAN Yun-fei(鄢云飞)

Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

Abstract:Based on the metallogenetic geology conditions, the H, O, C and S isotopic compositions were measured by MAT-251 mass spectrometer, and Pb isotope and Rb-Sr dating were carried with MAT−261 multi-acceptor mass spectrometer. The results show that the δ18O values of gold-bearing vein quartz from different levels are 1.19%−1.42%. The calculated δ18O values of ore fluids are 0.55%−0.78%, and δD values are from –8.64% to –6.66%. The calculated values of by the δ34Spy values in quartz veins display sulfur isotope compositions from −0.053% to +0.413%. Carbon isotope compositions of carbonates are from −0.612% to 0.140%. The mole ratios of 206Pb to 204Pb, 207Pb to 204Pb and 208Pb to 204Pb in auriferous quartz vein are 16.987−17.545, 15.342−15.623, and 38.254−38.744, respectively. The age of the Zhuanghe gold deposit determined by Rb-Sr isochron of the fluid inclusions in quartzes is (143.0±5.8) Ma. These isotopic data suggest that the metallogenetic fluids are generated from magmatic hydrotherm and the origin of ore-forming matters is related to the deep-derived magmatic activities. Meanwhile, the metallogenetic epoch of the Zhuanghe gold deposit is in Yanshanian period.

 

Key words: isotope systematics; metallogenetic age; Zhuanghe gold deposit

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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