华南钦杭结合带东段成矿特征与构造背景

TECTONIC SETTINGS AND METALLOGENISM OF THE EASTERN SEGMENT OF THE QIN-HANG BELT,SOUTH CHINA

钦杭结合带是中国华南重要的多金属成矿带,位于扬子地块与华夏地块结合部,北西以景德镇-湘潭-凭详深断裂带为界与扬子地块相邻,南东与华夏地块的边界为绍兴—萍乡—北海深断裂。在其漫长的地史时期主要经历了晋宁、加里东、印支、燕山构造运动,依次经历了洋壳俯冲与陆-陆碰撞、聚合造山、统一华南陆块形成、陆内强烈褶皱变形、燕山期地块活化、中生代大规模岩浆岩侵入与喷发、陆内成盆等发展阶段,导致钦杭结合带内存在有特征各异、形成时代不同的多期多种矿床集中出现。不同期次和特征的构造运动控制着相应的成矿作用,其中燕山期是钦杭结合带的成矿高峰期。

The Qin-Hang Belt,an important metallogenic belt in South China,is situated in the junction of the Yangtze Block and the Cathaysia Block,bounded by the Jingdezhen-Xiangtan-Pingxiang Deep Fault Zone to the northwest of the Yangtze block and the Shaoxing-Xiangping-Beihai Deep Fault Zone to the southeast of Cathaysia Block.It has experienced the Jinning,Caledonian,Indosinian and Yanshanian movements successively,and suffered from oceanic subduction,continent-continent collision,formation of the South China Block,intensive intracontinental folding,Yanshanian reactivation,large-scale Mesozoic magmatism and formation of intracontinental basins.Various mineral deposits controlled by correspondent structural patterns were formed in the belt in different periods,especially the Yanshanian Period.