长江中下游中生代构造岩相体系分布与成矿规律——新华夏构造体系的“长江式”构造研究

Distribution of Mesozoic Tectono-Facies System and Metallogeny in Middle and Lower Reaches of the Yangtze River——Research on Yangtze River-Type Tectonics in the Neocathaysian Structural System

构造分布及演化综合研究显示,长江中下游地区具中生代新华夏构造岩相体系控岩控矿特征,新华夏构造岩相体系主干构造是NNE向的大型褶皱和剪切挤压断裂带,均呈左行斜列分布;发育两组扭性剪切构造,被前人分别称为NEE向泰山式和NNW向大义山式构造;与之相伴的NWW向构造发育且对岩浆活动和内生矿产具有重要的控制作用。本文将"武汉-九江-德兴NWW向深断裂构造岩浆岩带"称为"长江式构造",归为新华夏系挤压带的横张构造成分。在中国东部,李四光所倡导的新华夏构造体系得到了新的证实和研究。

Synthetical analysis of the distribution and evolution of tectonics reveals that the Neocathaysian tectono-facies system controls the distribution of rocks and ore deposits in Mesozoic in the middle and lower reaches of the Yangtze River.The main tectonics of Neocathaysian tectono-facies system are large-scale NNE-trending folds and shearing compressive fault belt,distributing in left echelon,with two corresponding wrench shear structure,whose predecessors called Taishan-type and Dayishan-type tectonic belt,accompanied with NWW-trending structure delelopping well in the Yangtze River Basin,which has significant control on magmatic activity and endogenic deposits.Therefore,in this paper,the Wuhan-Jiujiang-Dexing NWW trending deep structural belt is called Yangtze River-type structure,which belongs to the Neocathaysian transversely tensioned structure of compressive zone.