中国大地构造的几个问题

PROBLEMS ON THE TECTONICS OF CHINA

黄汲清

Huang Jiqing

中国地质科学院

Chinese Academy of Geologicol Sciences

朱夏同志在最近的著作中强调了泛大陆三个阶段的形成和演化,并把B到A的短暂时期(2.8亿年到2亿年)作为过渡阶段,现就此提出一些意见: (1)古中国地台问题:多年前,作者和任纪舜提出了“古中国地台”一词,认为天山、祁连山、秦岭等褶皱系在兴凯运动以前(即Salair folding),也可能即在泛非运动(Pan-African)之后(震旦纪—寒武纪)均为陆壳所占据。

This article puts forward several arguments as follows, 1. The three development stages of Pangea suggested by Prof. Zhu Xia in his latest works are feasible for the tectonics of China. Their corresponding structural frame works show themselves on Chinese mainland. 2. Characteristics of plate tectonics of Chinese mainland are discussed with stress on the multicyclic and accordion-like movements. By making comparison of the folded belts of China's Qilian and Mongolia with the Variscian folded belts of western Europe and northern America, it is suggested that the Variscian folded belts can not fully fit with the four main signs of plate activity. Prof. Zhu Xia proposes that the regime of plate tectonics took shape posterior to Pangea A, and the regime of trough-platform dominated during Paleozoic time. To this statement,I can not take a clearcut stand because I have not made a thorough study on it. 3. The structural frame works of the Qinghai-Tibet, western Sichuan nd western Yunnan are briefly described here. It is most likely that the bordering between Gondwana and paleo-Eurasian is the ophiolitic belt stretching from Longmucuo-Yushu to Changnin-Shuangjiang. 4. The oil and gas prospecting in China should be focused on the Mesozoic of the eastern China.

https://doi.org/10.11781/sysydz198303165