Structural Ore-Controlling Characteristics and Electron Spin Resonance Dating of the Yanlinsi Gold Deposit in Northeastern Hunan Province
详细信息
- 责任者：Huang Cheng (Faculty of Earth Sciences ; China University of Geosciences ; Wuhan 430074 ; China) ; Fan Guangming
- 刊名：Geotectonica et Metallogenia
- 出版年：2012
- 卷期：36(1)
- 关键词：金矿 ; gold ores ; 构造控制 ; structural controls ; 湖南 ; Hunan Province
- 页码：p.76-84
- 图表：6 illus., 3 tables, 38 refs.
- 分类号：1001
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
摘要
///The aim of this paper is mainly to address the existence of ore source bed, controls of the NE-trending cleavage belt and NW-trending ductile shear zone on the distribution of the gold bearing quartz veins, and also the metallogenic epoch in Yanlinsi gold deposit. Based on field survey and lab analysis, the authors get the following results. The Mesoproterozoic Lengjiaxi Group is the source bed. The ore controlling structures are mainly NE-trending cleavage belt and NW-trending ductile shear zone. Since Caledonian, Yanlinsi area underwent strong structural compression, deep fluid migrating from thrust zone to cleavage belt via structural fissures, extracting Au from the source bed, and eventually, forming the first phase NE-trending gold ore body. At Early Yanshanian epoch, Yanlinsi area underwent NNE-trending strike slip, associating NW-trending R’ type ductile shear zone, mylonitization and schistositized of rocks possibly formed space for hydrothermal activity which could lead to gold mineralization, generating second-phase NW-trending gold ore body.