华南沿海莲花山断裂带控矿构造变形时限:来自锆石U-Pb年龄与地层时代的约束  

Deformation time limit of ore-controlling structures in Lianhuashan fault zone along the South China coast: Constraints from zircon U-Pb age and stratigraphic age

作　　者：王晓虎[1] 张文高[1] 陈正乐[1] 周荣德 陈柏林[1] 许典葵 霍海龙 李季霖 张涛[1] 丁志磊 李效壮 WANG Xiaohu;ZHANGWengao;CHEN Zhengle;ZHOU Rongde;CHEN Bailin;XU Diankui;HUO Hailong;LI Jilin;ZHANG Tao;DING Zhilei;LI Xiaozhuang(Laboratory of Dynamic Diagenesis and Metallogenesis,Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;No.931 Geological Party,Nonferrous Metals Geological Bureau of Guangdong Province,Shantou 515041,Guangdong,China)

机构地区：[1]中国地质科学院地质力学研究所,动力成岩成矿实验室,北京100081 [2]广东有色金属地质局931队,广东汕头515041

出　　处：《中国地质》2020年第4期985-997,共13页Geology in China

基　　金：中国地质调查项目(DD20160053、DD20190161);基本科研业务费项目(YYWF201614,院所长基金46)共同资助。

摘　　要：莲花山断裂带是中国东南沿海广东省境内一条重要的NE向断裂构造带,同时也是一条重要的锡、钨、铜、铅锌多金属成矿带。本文通过莲花山断裂带和典型矿区野外地质观测及断裂带内发生剪切变形作用的花岗岩体锆石U-Pb年龄测定,初步探讨了莲花山断裂带内韧性变形时限、脆性边界断裂发育时限,以及韧性剪切变形与成矿的关系。研究表明莲花山断裂带内韧性变形时限在129~127 Ma,脆性的边界断裂发育于官草湖组和合水组地层沉积时限之间,莲花山断裂带中韧性剪切变形早于成矿发生时间,韧性剪切变形为成矿提供了容矿空间。The Lianhuashan fault zone is not only an important NE-striking fault zone in Guangdong Province but also a significant tin, tungsten, copper, lead-zinc polymetallic metallogenic belt. Based on geological field observation of the Lianhuashan fault zone and the typical mining area as well as the measurement of the zircon U-Pb age of the granite intrusive with ductile deformation, the authors preliminarily investigated the time of ductile deformation and boundary fault and the relationship between deformation and mineralization in this paper. The result indicates that the ductile deformation time in the Lianhuashan fault zone is around 129-127 Ma, and the brittle boundary fault was developed between the sedimentary time of Guancaohu Formation and the Heshui Formation. The age of ductile shear deformation in the Lianhuashan fault zone was earlier than the mineralization time, and the ductile shear deformation provided the ore-bearing space for mineralization.

关 键 词：莲花山断裂带 韧性剪切变形 控矿构造 锆石U-PB年龄 矿产勘查工程 广东 

分 类 号：P613[天文地球—矿床学]