再论陆内型造山作用

REEXAMINATION ON THE INTRACONTINENTAL-TYPE OROGENY

目前流行的半真实、半虚假的新全球构造学说已经给中国大陆地质研究带来一定的困惑和困难。中国大陆各地质时代发生的造山作用皆属陆内型。用地体说、碰撞说、地缝合线说和安第斯造山模式论述青藏高原的形成、演化史是地质研究的几个误区。秦岭-大别山属陆内型造山带,其形成与板块构造无关,采用壳-幔拆离构造的造山机制可解释超高压变质岩的生成。超高压变质岩是识别岩石圈收缩引起的一系列地质事件最有效的标志。

The current New Global Tectonics is proved to be partly true and partly false. It has already brought about puzzles and difficulties in the study of Chins' s continental geology. Orogenis which occurred at all geological stages in China's continent belong to the intracontinental-type orogeny. So, dealing with the formation and tectonic evolution of the Qinghai-Tibet plateau by the suspected terrain doctrine, the continental collision theory and the Andean-type orogenic model has fallen in erroneous zones. The Qinling-Dabie orogenic belt is an intracontinental-type one, independent of continental collision. In this paper the crust-mantle detachment model as a causal mechanism of intracontinental orogeny is used to explain the formation of ultra -high pressure metamorphic rocks. Such rocks is considered to be the most effective indicator to identify a series of geological events due to lithosphere compression.