哀牢山造山带构造演化

哀牢山造山带造山活动始于晚二叠世的扬子陆块被动边缘的裂谷环境,经过印支及喜马拉雅期两次造山作用,形成了四个构造世代的叠加构造变形。这些不同时期的构造共生组合,既表现出陆内造山带垂向上不同构造层次构造环境的流变学特征,又反映了造山物质从表部下冲到地壳深处,又折返地表的复杂经历。清晰地刻划出哀牢山造山带的所经历的陆内俯冲、主期碰撞造山及后期卷入喜马拉雅造山活动的发展过程。

THE STRUCTURAL EVOLUTION OF AILAOSHAN OROGEN

The orogenesis of Ailaoshan orogen began in the Late Permian rift environment of the passive margin of Yangzi Landmass. The superimposed structural deformation of 4 structural generations in it were formed by 2 orogeneses of Indosinian and Himalayan. The structural paragenetic association of different period not only shows the rheological characteristics of structural environment of different virtical structural level in an inland orogen but also reflects the complicated experiences that the orogenic materials thrust into the deep part of crust from the surface and then turn back to the surface, which shows clear the development process of Ailaoshan orogen, ie the inland thrusting, the collision and orogenesis in the principal stage and the later ?involvement in the Himalayan orogenesis.