松潘-甘孜造山带西部碰撞结合带中生代多岛弧盆收缩史  

Shrinking History of Archipelagic Island-arc-basin System in the Plate Junction in the West Songpan-Ganzi Orenic Zone during the Mesozoic

作　　者：戴宗明[1,2] 孙传敏[2] 

机构地区：[1]四川省地矿局区域地质调查队,四川双流610213 [2]成都理工大学地球科学院,成都610059

出　　处：《四川地质学报》2009年第S2期8-13,共6页Acta Geologica Sichuan

基　　金：中国地质调查局<1:25万新龙县幅区域地质调查>项目(编号200112000003)成果之一

摘　　要：经过对近年的区域地质调查成果总结,认为松潘-甘孜造山带西部碰撞结合带在古生代以后经历了三个重要的发展时期,即晚三叠世的岛弧盆收缩期,侏罗纪至白垩纪的碰撞造山期,新生代的陆内走滑、推覆改造和高原隆升期。晚三叠世俯冲碰撞作用强烈,形成了一系列火山弧和火山岩浆弧;侏罗纪至白垩纪发生的俯冲碰撞造山,形成了以弧-陆碰撞造山为主,并有弧-弧碰撞造山、弧后挤压造山等多种形式的、复杂的复合造山带;在古近纪、新近纪经历强烈的走滑、推覆改造活动;在第四纪由于高原隆升形成了现今的新生代山脉。The recent regional geological survey indicates that the plate junction in the west Songpan-Garzê Orogenic Zone during the post-Paleozoic underwent 3 phases: shrink of the island-arc-basin system during the Late Triassic,collisional orogeny during the Jurassic-Cretaceous and intracontinental strike-slip and pull-apart as well as napping during the Cenozoic.The strong collision in the Late Triassic resulted in a series of magmatic of arcs.The collisional orogeny during the Jurassic-Cretaceous resulted in complicated orogenic zones.Strong strike-slip and pull-apart as well as napping during the Paleogene and Neogene resulted in uplifting of the plateau,forming the Cenozoic mountains.

关 键 词：松潘-甘孜 中生代 义敦岛弧 造山带 

分 类 号：P542[天文地球—构造地质学]