Structure Analysis and Structural Metallogenesis of the Linwang Gold Deposit, Leye, oft-com:office:smarttags" />
详细信息
- 责任者：Chen Maohong (School of the Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Huang Qingwen
- 刊名：Geotectonica et Metallogenia
- 出版年：2010
- 卷期：34(3)
- 关键词：金矿 ; gold ores ; 矿田构造 ; mine field structure ; 广西 ; Guangxi
- 页码：p.349-361
- 图表：7 illus., 1 table, 16 refs.
- 分类号：1001
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
摘要
The Linwang gold deposit,which is located in Leye County of Guangxi Zhuang Autonomous Region,is one of newly discovered middle-scale Carlin-type gold deposits in Yunnan-Guizhou-Guangxi triangle area in the southwestern China.It consists of stratabound and fault-controlled orebodies.Detailed structural analysis shows that the structural lines of the deposit can be classified into three groups,i.e.,north-south trend,northeast trend and northwest trend,among which,north-south trend structural line(asymmetric folds and thrusts formed in collision stage) controls the structural framework of the deposit.The compression direction of structural stress field changed perpendicularly in the post-collision stage,as evidenced by the refolding of the north-south trend folds,which were generated in collision stage,into northeast-east strike superimposed folds and the formation of F1 sinistral-normal slipping fault.Ore-formng fluids flew into extension parts and deposited gold.At least three structural deformation stages can be discerned in the deposit,i.e.,syngenetic splitting,collisonal compressing,and postcollision lateral extrusing.The gold mineralization occurred mainly at the postcollisional lateral extrusion stage.Stratiform orebodies are mainly hosted in the cores of anticlines,and spatially associate with the vein orebodies hosted in faults.Strata association of distinctly different competence and permeability is the lithologic basic to form stratiform orebodies,fracture is the dominating factors.The structural traps which composed by argillaceous impermeable barrier and recoil thrust or anticline,and the structural culmination formed by superimposition of different stage non-coaxial anticlines are the main locus to host thick orebodies.The Linwang gold deposit,located between the Lannigou gold deposit and the Shuiyindong gold deposit,and the three deposits form a complete deposit pattern series from vein→compound of vein and stratiform → stratiform pattern.The compound pattern suggests that the stratiform orebodies are of epigenetic hydrothermal.