神奇美丽的横断山:地壳演化塑造的奇迹——“三江并流”世界自然遗产地形成地质背景浅析

Mystical and beautiful Hengduan Mountains: a miracle made by crustal evolution-Analysis of the geological background for "confluence of three rivers".

三江并流是反映地球演化主要阶段的杰出代表,区内保存着反映特提斯演化不同阶段和喜马拉雅期陆内造山阶段留下的丰富的地质遗迹,这些地质遗迹为解读三江并流地壳演化的历史提供了重要的依据。有关资料表明,三江并流是与青藏高原和横断山脉一起发育成长起来的,它们均经历了特提斯的演化,并且都是印度板块与欧亚板块强烈碰撞造山作用的产物。本文比较详细地介绍了横断山脉的形成演化过程及其与青藏高原形成演化之间的关系。

The ＂confluence of three rivers＂ is an outstanding representative reflecting the main stage of evolution of the Earth. Abundant geological remains reflecting different stages of Tethys evolution and Himalayan intracontinental orogenic stage are preserved in the study area. These geological remains provide an important basis for the interpretation of the history of crustal evolution marked by confluence of three rivers. Relevant data indicate that confluence of three rivers occurred together with the formation of the Qinghai-Tibet Phteau and the Hengduan Mountains. They all experienced the evolution of the Tethys and are all the product of strong collisional orogeny of the Indian plate and Eurasian plate. This paper introduces in details the formation and evolution of the Hengduan Mountains and their relation to the formation and evolution of the Qinghai-Tibet Plateau.