准噶尔盆地东部中生代构造迁移规律  

Mesozoic Tectonic Migration in the Eastern Junggar Basin

作　　者：孙文军[1] 赵淑娟[1] 李三忠[1] 索艳慧[1] 刘鑫[1] 楼达[2] 余珊[1] 杨朝[1] 王学斌[1] 李涛[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国石油大港油田公司,天津300280

出　　处：《大地构造与成矿学》2014年第1期52-61,共10页Geotectonica et Metallogenia

基　　金：国家自然科学基金重大项目(批准号:41190072,41190070);国家杰出青年基金项目(批准号:41325009)联合资助

摘　　要：构造迁移是盆地发展演化过程中十分普遍的地质现象,但准噶尔盆地东部地区相关研究程度较低。本文基于对准噶尔盆地东部地区所开展的大量地震剖面解释,并综合前人研究成果,对准噶尔盆地东部地区中生代构造迁移特征进行了系统讨论。准噶尔盆地东部中新生代期间属于陆内,受西伯利亚板块持续向南楔入的远程效应,其构造特征总体表现出自北向南的迁移规律,具体表现为盆地内的逆冲断裂迁移、沉积沉降中心迁移、断陷的萎缩与消亡等自北向南逐步变新。最后,从板缘和板内过程和机制,探讨了该盆地东部的中生代构造迁移机制,这种构造-沉积-成盆等的向盆内变新迁移是中生代以来准噶尔盆地基底向西挤出构造和中生代西伯利亚板块向南楔入的联合效应。Tectonic migration is a common geological process during basin formation and development. However, little is known about the tectonic migration in the eastern Junggar Basin. This paper focuses on the eastern part of the Junggar Basin to discuss Mesozoic tectonic migration and its mechanism based on our interpretation of seismic profiles and previous structural results in the eastern part of the Junggar Basin. The eastern Junggar Basin was under intraplate setting in Mesozoic-Cenozoic. Under the southward indentation of the Siberian Plate, the tectonic migration was characterized by progressively southward propagating of faulting, sedimentation, depression, termination of faulting in the basin. Finally, this paper discusses the mechanism and processes of Mesozoic tectonic migration from interplate to intraplate. The migration mechanism of the tectonism-sedimentation-basin formation is related to the Mesozoic extrusion tectonics of the basement of the Junggar Basin and the southward indentation of the Mesozoic Siberian Block.

关 键 词：准噶尔盆地 中生代 构造迁移 逆冲推覆 

分 类 号：P541[天文地球—构造地质学]