摘要
本文根据1∶25万地质填图成果,将班公湖-怒江结合带西段弧-盆系时空结构自北向南划分为五峰尖-拉热拉新晚侏罗世—早白垩世陆缘火山-岩浆弧带、班公湖蛇绿混杂岩北、南亚带和昂龙岗日-班戈白垩纪—始新世岩浆弧带等,初步认为中特提斯洋经历了三叠纪—早侏罗世扩张,中—晚侏罗世往北、南双向俯冲,晚三叠世—早白垩世残余洋(海)盆和早—晚白垩世陆-弧(陆)碰撞等演化阶段。
The spatial-temporal framework of the arc-basin systems in the western part of the Bangong Lake-Nujiang suture zone may be divided, from north to south on the basis of the results of the 1 ： 250 000 geological mapping, into the Wufengjian-Larelaxin Late Jurassic - Early Cretaceous epicontinental volcanic-magmatic arc zone, northem and southern subzones of the Bangong Lake ophiolitic mélange zone, and Nganglong Kangri-Baingoin Cretaceous - Eocene magmatic arc zone. The Meso-Tethyan Ocean once went through the Triassic - Early Jurassic spreading, Middle- Late Jurassic northward and southward bidirectional subduction, Late Triassic - Early Cretaceous residual ocean （sea） basin and Early - Late Cretaceous continent-arc （continent） collision.
出处
《沉积与特提斯地质》
CAS
CSCD
2006年第4期25-32,共8页
Sedimentary Geology and Tethyan Geology
基金
中国地质调查局"1:25万邦多区幅
措麦区幅
羌多幅
日土县幅
喀纳幅(国内部分)区域地质调查"
关键词
班公湖-怒江结合带
中特提斯
多岛弧-盆系
构造演化
西藏
Bangong Lake-Nujiang suture zone
Meso-Tethys
archipelagic arc-basin system
tectonic evolution
Xizang
