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Geochemical Characteristics of Ore-Forming Elements and Ore Genesis of No.96 Ore-body in the Dachang Deposit, Guangxi

FAN Sen-kui1,2|WANG Deng-hong3|LIANG Ting4|WU De-cheng2|
WEI Ke-li5|ZHOU Hong-jun6|HUANG Hui-ming2|QU Wen-jun7   

  1. 1.School of Geoscience and Environmental Engineering, Central South University, Changsha 410083|China;
    2.No.215 Geological Team, Liuzhou|Guangxi 545000|China;
    3.Institute of Mineral Resources/Key Laboratory of Mineralization and Resource Evaluation, Ministry of Land and Resources, Chinese Academy of Geological Sciences, Beijing 100037|China;
    4.School of Earth Science and Land Resources, Chang’an University, Xi’an 710054|China;
    5.Guangxi Nonferrous Metals Group Co., Ltd., Nanning 530000|China;
    6.Guangxi Huaxi Group Co., Ltd., Liuzhou, Guangxi 545000|China;
    7.Inorganic Analysis Laboratory, National Research Center for Geoanalysis, Beijing 100037|China
  • Received:2009-09-09 Online:2010-07-26 Published:2010-07-26

Abstract:

No.96 ore-body in Dachang ore field is the biggest zinc-polymetallic ore-body discovered during the exploration projects in exhausted reserves mines in China. It’s located between the Bali-Longtoushan deposit and Lamo deposit, with the depth of 600-800 m. The ore-body is rich in tin and polymetallic elements in the Bali area, toward the northeast, becomes the copper-zinc deposit, almost without tin, in the Heishuigou area. From west to east, contents of both zinc and tin decrease, while, that of copper increases. Antimony and lead are enriched only in the near surface, downward near to the granite, the grade of silver decreases. The spatial distribution of main elements are continously fluctuated. The northern part of No.96 ore-bdoy is characterized by metasomatism-filling zinc-copper mineralization. Both the tin-polymetallic and the zinc-copper mineralization are distributed in the fault intra layers within the same formation. It can be concluded that the No.96 ore-body, similar to the Changpo-Tongkeng and Lamo deposit, is formed by magmatic hydrothermal metasomatism during the Late Yanshanian stage.

Key words: Dachang ore field in Guangxi, No.96 orebody, ore-forming elements, geochemistry

CLC Number: 

  • P618.4
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