广西大厂矿田成矿构造系列与成矿系列的时-空联系  

Temporal and spatial relation between the metallotectonic series and metallogenic series in the Dachang orefield,Guangxi

作　　者：汪劲草[1] 余何[1] 江楠[1] 汤静如[1] 韦安伟 

机构地区：[1]桂林理工大学有色及贵金属隐伏矿床勘查教育部工程研究中心,广西桂林541004

出　　处：《桂林理工大学学报》2016年第4期633-643,共11页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(41172089;41674075);广西自然科学基金项目(2014GXNSFAA118281);有色及贵金属隐伏矿床勘查教育部工程研究中心项目(2015GCZX001)

摘　　要：基于构造解析,认为大厂矿田存在海西期喷流-沉积成矿系统、印支期层滑剪切成矿系统及燕山期岩浆成矿系统;91、92号层状矿体是集海西期喷流沉积成矿、印支期与燕山期叠加成矿于一体的多因复成矿体;印支期层滑剪切成矿系统控制了75、77、79、80号层状矿体与100号岩溶型矿体。燕山期成矿系统从早至晚包括:1控制细脉带矿体的偏正花状节理系成矿构造系统;2控制大脉带矿体的偏负花状张裂系成矿构造系统;3控制94、95、96号层状锌铜矿体及岩体接触带矽卡岩型铜锌矿体的、与岩体被动侵位-层滑剪切有关的成矿构造系统。认为丹池成矿带存在海西期喷流沉积成矿系列、印支期层滑剪切成矿系列及燕山期岩浆岩成矿系列;讨论了大厂矿田成矿构造系列与成矿系列的时空联系;从矿体形貌学上分析了矿体形貌与构造体系及样式之间的因果关系。印支期成矿观点的提出,不仅可以补充与丰富区域成矿与找矿的理论,对于了解古特提斯成矿域的成矿特征、构造过程及构造边界等科学问题,也具有重要的意义。Structural analysis reveals three metallogenic systems in Dachang orefield,including Hercynian effusive-sedimentary metallogenic system（HMS）,Indosinian layer-sliping and shearing metallogenic system（IMS）and Yanshannian magmatic metallogenic system（YMS）.No.91 and No.92 layered orebodies are of polygenetic compound,which are controlled by three metallogenic systems.While No.75,No.77,No.79 and No.80 layered orebodies are controlled by the IMS,as well as No.100 karstic orebody.Studies show that the YMS consists of three subsystems from early to late period,including the partial positive flower metallotectonic subsystem controls the veinlet orebodies.The partial negative flower extensional metallotectonic subsystem which controls the large vein orebodies.The last subsystem associated with passive emplacement,layer-sliding and shearing of the rock mass,controls No.94,No.95,No.96 layered zinc-copper orebodies and skarn type copper-zinc orebodies.This paper holds that the Nandan-Hechi metallogenetic belt exists in three metallogenic series,which are Hercynian effusive-sedimentary metallogenic series,Indosinian layer-sliping and shearing metallogenic series and Yanshannian magmatic metallogenic series,respectively.The paper discussed the temporal and spatial relation between the metallogenic series and metallotectonic series,and analyzed the genetic relationship between the orebody morphology and structural style based on the orebody morphology in the Dachang orefield.Accordingly,Indosinian metallogenetic idea can not only supply and enrich the regional metallogenetic and prospecting theory,but also be of significance to learn about scientific problems of the Paleotethys metallogenetic domain,such as metallogenic features,tectonic process and tectonic boundary.

关 键 词：成矿构造系列 成矿系列 构造体系 印支期成矿 矿体形貌 大厂矿田 

分 类 号：P613[天文地球—矿床学]