中国南方中新生代大地构造属性和南华造山带褶皱过程

Meso-Cenozoic Nanhua (South China) Orogenic Belt-Subaerial Tridirectional Orogen

笔者阐述了中国南方中新生代大地构造属性是陆上三向造山带,是在陆上无海侵的大地构造环境下,由特提斯、北西太平洋和昆仑—秦岭三大构造域相互作用形成的具有NW、NE、WNW三问优选大地构造线的造山带,是由晚二叠世以来多期次继承性造山运动累积叠加形成的,其中印支褶皱非常轻微。印支运动导致华南地台盖层全面褶皱的主张与实际资料相矛盾。印支运动主要表现为隆升、海退和原始沉积盆地的掀斜.而褶皱作用非常微弱.并且是局部性的。

The author considers that the Meso-Cenozoic tectonic attribution in Southern China is a sub-aerial tridirectional orogenic belt. The subaerial orogenic belt means an orogen formed by the folding-deformation under subaerial tectonic environment without marine transgression. The tridirectional orogenic belt means an orogen formed by the subsynchronous interaction among the three tectonic domains, i. e. Tethys, Northwest Pacific and Kunlun-Qinling, with tridirectional, i. e. NW, NE and WNW, optimized tectonic lines in the west part and east part and on the north margin.The paper points out that the long-held idea that the overall folding of the platform cover in South China caused by the Indosinian orogeny is in contradiction with actual data. The Indosini-an tectogeny was chiefly expressed by the elevation, regression and tilting of primitive sedimentary basin and its folding was quite slight and local.