格尔木—额济纳旗断面走廊域火成岩－构造组合与大地构造演化

摘要：主要基于火成岩组合讨论了大地构造演化。提出碰撞型蓝片岩是大洋闭合与陆－陆碰撞作用的产物和标志，白云母／二云母花岗岩是陆内俯冲作用的岩石学记录，以钾玄岩系列为主的火成岩组合是水平缩短式陆内造山带边界的标志，造山末期Ａ型花岗岩是造山带崩塌的标志。重建了祁连山—柴达木地区与北山地区的构造演化和造山过程。讨论了新生代陆内造山－岩浆作用，提出了青藏－喜马拉雅陆内造山火成岩的成对性，由此探索了陆内造山过程

IGNEOUS PETROTECTONIC ASSEMBLAGES AND GEOTECTONIC EVOLUTION ALONG GO LMUD EJINAQI GEOSCIENCES SECTION

The geotectonic evolution along the Geosciences Section is discussed on the basis of the igneous petrotectonic assemblages. It is suggested that the greenschist of the collision type is considered as the products and marks for the continent continent collision during the oceanclosing, the muscovite/two mica granites is regarded as a petrological records for the intracontinental subduction, the shoshonite series is believed as a mark of the margin of intracontinental orogenic belt with the lithosphere horizontal shortening type, and A type granites in the late orogenic period are considered to be an indicator for the orogenic collapse. The geotectonic evolution and the orogenic processes are reconstructed for the Qilianshan Chaidamu and Beishan regions. The Cenozoic intracontinental orogenic magmatism is discussed, the pairing of the intracontinental orogenic igneous rocks of the Qinghai Tibet Himalaya is suggested, and the intracontinental orogenic processes are traced.