Study on Geology and Tectono-Geochemistry of the Silongduo Lead-Zinc Deposit in Xietongmen County, Tibet
详细信息
- 责任者：Qian Jianping (College of Earth Sciences ; Guilin University of Technology ; Guilin 541004 ; China) ; Huang Deyang
- 刊名：Geotectonica et Metallogenia
- 出版年：2013
- 卷期：37(1)
- 关键词：铅锌矿床 ; lead-zinc deposit ; 构造地球化学 ; tectono-geochemistry ; 西藏 ; Tibet
- 页码：p.29-41
- 图表：illus., 3 tables, 24 refs.
- 分类号：1001
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
摘要
Base on field survey and ore-forming structure analysis for the Silongduo lead-zinc deposit, the structural controls and tectonic geochemical prospecting of the orefield are discussed. The regional EW-trending compressed zones are the major rock-and ore-controlling structures, and their intersections with the transverse and oblique ruptures are the favorable ore-bearing positions. The occurrence of the lead-zinc ore body was controlled obviously by lithology. The Upper Carboniferous dolomitic limestone and dolomite of the Anjie Group are the favorable host rocks. The lead-zinc ore body is usually located in the contacts between the small granite-porphyry bodies and carbonate rocks. The concentrations of elements such as Pb, Zn, Mn, As, Sb, Mo, Cu, Bi, Sn in the rocks from the orefield are high with variable coefficients of variation, and thus can be regarded as indicator elements for ore prospecting. The distribution patterns of the ore metals, e.g., Pb, Zn, Ag, Mn, show characteristics of bimodal distribution, indicatve of the involvement of mineralization. The texture and the element association of the ores show that the ore-forming processes are of multi-period and multi-stage. The study on the element zonation and primary halo show a downwards zonation of (Cr-W-Co-V-Ni)→(Ti-Ba)→(Pb-Ag-Au-As-Sb-Cu-Bi)→(Sr-Zn-Mn-Mo-Sn). The zonation of elements such as As, Sb are overlying the main ore body. Combining with the analysis of ore-control structure in the orefield, we speculate that there is a concealed ore body at the depth of the mining area.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |