郯庐断裂带的几个关键问题探讨  

Discussion on Several Key Problems of the Tanlu Fault

作　　者：梁光河[1,2,3] LIANG Guanghe(Key Laboratory of Mineral Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Institutions of Earth Sciences,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院矿产资源研究重点实验室,北京100029 [2]中国科学院地球科学研究院,北京100029 [3]中国科学院大学,北京100029

出　　处：《黄金科学技术》2018年第5期543-558,共16页Gold Science and Technology

基　　金：国家重点研发计划“深地资源勘查开采”重点专项项目“北方增生造山成矿系统的深部结构与成矿过程”(编号:2017YFC0601204);国家重大科研装备研制项目“深部资源探测核心装备研发”子项目“金属矿地震探测系统”(编号:ZDY2012-1-06)联合资助

摘　　要：郯庐断裂是中国东部的一个巨型断裂,目前关于郯庐断裂的几个关键问题仍存在较大争议:一是郯庐断裂的长度;二是郯庐断裂的走滑距离和走滑深度;三是郯庐断裂的形成与活动时间;四是郯庐断裂与胶东金矿的关系。基于地质、地球物理和地球化学研究结果,结合近期郯庐断裂带区域高精度石油地震勘探资料和地质测年资料,通过大地构造演化史恢复说明,郯庐断裂的雏形出现在中生代的中央造山带东段,走滑开始于新生代初期,大规模平移走滑发生在45～24 Ma,并持续活动至今。郯庐断裂总体左行走滑量约为760 km,总长度约为3 000 km。对于胶东金矿,郯庐断裂主要是一个改造断裂。郯庐断裂带的形成和演化与中新生代欧亚板块东缘的构造环境变化密切相关。研究结果为中国东部大地构造动力演化及成矿过程研究提供了新思路。Tanlu fault is a huge fault in eastern China.At present,there are still some key problems concerning the Tanlu fault.One is the length of Tanlu fault.The second is the horizontal slip distance and depth of the Tanlu fault.The third is the formation of Tanlu faults and its activity time.The fourth is whether it is the main controlling factor for the formation of the Jiaodong gold deposit.Based on a large number of geological,geophysical and geochemical results,combining the latest high-precision petroleum seismic exploration in Tanlu fault zone,the restoration of tectonic evolution shows that the rudimentary Tanlu fault occurred in the Mesozoic,mainly in the central orogenic belt of the southern section,and large-scale strike slips occurred in the Cenozoic(45~24 Ma).The horizontal slip distance of the Tanlu fault is about 760 km.Tanlu fault is mainly a reconstructed fault,not the main control structure of the Jiaodong gold deposit.The primary ore-controlling structure of the Jiaodong gold deposit is a central orogenic belt.The formation and evolution of the Tanlu fault is closely related to the formation of many Mesozoic and Cenozoic pull-apart basins in eastern China.This study will provide a new idea for the study of tectonic dynamic environment and mineralization process in eastern China.

关 键 词：郯庐断裂带 胶东金矿 走滑活动时间 走滑距离 地震勘探 构造演化史 郯庐断裂长度 

分 类 号：P64[天文地球—地质矿产勘探]