摘要
青藏高原夹持于土兰、塔里木、华北、扬子与印度等刚性地块之间，在地球物理场和岩石圈结构构造上构成一个相对独立的构造系统。白垩纪晚期到始新世，高原开始了一个地壳缩短、加厚和不断隆升的新阶段。高原隆升可以划分为俯冲碰撞隆升、汇聚挤压隆升和均衡调整隆升３个阶段。高原地壳的加厚、缩短是在压应力作用下通过不同层次物质以不同的运动形式实现的，高原隆升的过程和机制可以概括为“陆内汇聚－地壳分层加厚－重力均衡调整”的隆升模式。
From the late Cretaceous to the Eocene ,the Qinhai-Tibet plateau ended its history of the oceancrust evolution and started a new stage of the continental collision,the crustal shortening and thicken-ing,while the plateau continuously uplifted.The uplift process of the plateau can be divided into threestages as follows:the subductin-collision uplift stage, the convergent-compression uplift stage and iso-static adjust uplift stage. The crustal shortening and thickening of the plateau have been brought boutby motions of the different structural layers of the crust in different manners. The uplift mechanism ofthe plateau may be summarized as″intracontinental converging-layering thickening-isostatic adjust-ing″.
关键词
青藏高原
隆升
俯冲碰撞
汇聚挤压
均衡调整
Qinhai-Tibet plateau uplift subduction-collision convergent-compressionisostatic adjust
