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额尔齐斯-西拉木伦对接带古生代沉积盆地演化
引用本文:徐增连,骆满生,杨文麟,王成刚,吴年文.额尔齐斯-西拉木伦对接带古生代沉积盆地演化[J].地球科学,2014,39(8):1099-1118.
作者姓名:徐增连  骆满生  杨文麟  王成刚  吴年文
作者单位:1.中国地质大学地球科学学院, 湖北武汉 430074
基金项目:中国地质调查局项目(Nos.1212010733802,12120113012500)
摘    要:额尔齐斯-西拉木伦对接带位于西伯利亚板块、华北陆块和准噶尔地块之间, 其构造演化和古亚洲洋洋盆的打开与关闭有密切的关系.笔者在系统分析研究区3个二级和19个三级构造单元古生代岩石地层、生物地层及年代地层的基础上, 对沉积盆地进行原型恢复, 共划分出10个盆地类型.同时, 根据沉积盆地充填序列对研究区的构造-沉积演化做出了初步的论述.(1)早古生代-早石炭世古亚洲洋俯冲阶段; (2)早、晚石炭世之交的碰撞演化阶段; (3)晚石炭世-早二叠世碰撞及碰撞后演化阶段.研究认为古亚洲洋的闭合由西向东呈"剪刀式", 时间分别为早石炭世末(318 Ma)和中二叠世-早三叠世(260~245 Ma).三叠纪古亚洲洋消亡总体转为陆相环境. 

关 键 词:沉积    构造    盆地演化    古生代    额尔齐斯-西拉木伦
收稿时间:2014-04-03

Paleozoic Sedimentary Basins Evolution of Ertix-Xar Moron Suture
Abstract:The Ertix-Xar Moron suture is located at the joint part of Siberia, North China and Junggar, and its tectonic evolution has a close relationship with the opening and closing of Paleo-Asian Ocean basin.In this paper, plates the sedimentary basin types are reconstruted and define 10 basin types by an integrated research on the Paleozoic lithostratigraphy, biostratigraphy and chronostratigraphy are defined. The structure-sedimentary evolution of the study area is discussed based on the sedimentary basin-fill sequence and concluded as the following stages: (1) Early Paleozoic-Early Carboniferous subduction stage of the Paleo-Asian Ocean; (2) Early, Late Carboniferous collisional stage; (3) Late Carboniferous-Early Permian collision and post-collisional evolution stage. It is suggested that the Paleo-Asian Ocean closed from west to east like "scissors", and the closing began from the end of the Early Carboniferous (318 Ma) to the Middle Permian-Early Triassic (260-245 Ma).During Triassic, the Paleo-Asian Ocean disappeared and converted to total terrestrial environment. 
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