中国南方东部三叠纪古地理演化及其构造控制

中国南方东部的大地构造背景控制着古地理演化特征，不同构造单元内沉积盆地的性质存在着显著差别。早三叠世的中下扬子混积盆地属克拉通边缘盆地，而上饶和明溪碎屑岩盆地则为大陆边缘断陷盆地。在整个三叠纪，区域性大断裂对沉积相的分布具有显著的控制作用。绍兴—宜春断裂作为构造分区的界限，控制了其两侧古地理的发展。古地理演化是构造运动的直观响应，中国南方三叠纪的地壳抬升、台地浅滩化、海水退出与印支运动密切相关

PALAEOGEOGRAPHICAL EVOLUTION AND TECTONIC CONTROL OF TRIASSIC IN THE SOUTHEAST OF CHINA

he tectonic setting in the southeast of China controlled the palaeogeographic evolution, and depositional basins have the different characteristics dueto the variation of the tectonic units. The sedimentary geochemistry analysis indicates that the Middle\|Lower Yangtze Basin is the craton basin, and Shangrao and Mingxi Basins are the continental margin fault basins in the Early Triassic. The regional faults controlled the distribution of the facies, and the Shaoxin\|Yichun fault controlled the evolution of the palaeogeography in the two sides of the fault. The palaeogeographic evolution sensitively responds to the tectonism in the whole Triassic. The basement uplift, the platform shallowening and the marine regression have the close relations with the Indosinian Movement.\=