东天山(E85-90°)加里东沟-弧-盆褶皱系的地质特征及其构造演化  

GEOLOGICAL FEATURES AND TECTONTC EVOLUTION OF EAST TIANSHAN CALEDONIAN TRENCH-ARC-BASIN FOLDBELT

作　　者：郭继春[1] 胡受奚[1] 顾连兴[1] 杨浩[1] 

机构地区：[1]南京大学地球科学系

出　　处：《南京大学学报（自然科学版）》1992年第3期431-438,共8页Journal of Nanjing University（Natural Science）

基　　金：三0五项目Ⅲ4课题组

摘　　要：东天山加里东造山带为一沟-弧-盆褶皱系,共内部构造单元自北向南可分为海沟俯冲杂岩带、岛弧带和弧后盆地褶皱带。它主要是在晚前寒武纪和早古生代阶段于塔里木古板块北缘的安第斯型活动大陆边缘逐渐演变成西太平洋型,最后伴随西太平洋型活动大陆边缘之沟-弧-盆体系的闭合而形成的陆缘增生造山带。Based upon intensive field and laboratory investigations, the authors realized the existence of a Caledonian orogenic belt in the East Tianshan mountains and its significance to the tectonic framework of this region. During the Caledonian cycle (Pt_3+P_(z_1)), this belt began as an Andean-type active continental margin and then evolved into a West Pacific-type trench-arc-basin system, which olosed eventually and accreted as a trench-arc-basin foldbelt to the north margin of the ancient Talimu continent. The foldbelt can be subdivided into three tectonic units: the enclosed back-arc basin, the island arc, and the trench accretioary zones.

关 键 词：蛇绿混杂岩 加里东造山带 褶皱带 

分 类 号：P542.2[天文地球—构造地质学]