江西省地质构造格架及地壳演化

THE GEOLOGICAL TECTONIC FRAMEWORK AND THE CRUSTAL EVOLUTION IN JIANGXI PROVINCE

江西省从绍兴—萍乡—钦州古缝合线为界，分属扬子古板块与华南古板块。历经中元古代早期、新元古代早期等裂谷时用、四堡、加里东、印支、燕山等构造运动。包括５个地壳演化阶段，即早寒武纪原始陆壳形成阶段，中元古代扬子、华夏等古地体活动阶段，新元古代至早古生代扬子、华南古板块与华南陆间裂谷带活动阶段，晚古生代至中三叠世华南大陆形成阶段以及中、新生代欧亚板块活动与华南大陆“活化”阶段，形成了以“南北分野”的古构造基础，以中新生代“向洋分带”为主导的复合构造格局。

The Yangzi old plate and the Southcbina cld plate were seperated bytaking Shaoxing-pingxiang-Qinzhou old suture line as their boundaries inJiangxi province. They underwent the rift stages of the eariy-middle Pro-terozoic era ard the early-Neoproterozoic era, etc and the orogenies of L-liang, Caledoniap, IndeSinian and Yanshanian, etc,including 5 crustalevclution stages, that is, the forming stage of the early pre-Cambrian pri-mary continental crust, the activation stage of the old terrance cf the mi-ddle Proterozoic Yangzi and Cathaysia, etc, the activaticn stage of theNeo-proterozoic and early Paleozoic Yangzi, Southchina old plate andthe Southchina intercontinental rift zcne , the ferming stage of LatePaleozoic and middle Triassic Southcbina continental as well as the “acti-vation” stage of Mesozoic-Cenozoic Eurasian plate activation, thus for-ming the paleotectonic basis of“Seperation of South and the compositetectonic framework guided by the “Zoning toward the ocean”.