地质科学2012，Vol.47Issue(3)：588-606,19.
塔里木盆地孔雀河斜坡尉犁断鼻构造的构造特征与形成演化
Tectonic features, formation and evolution of Yuli fault nose-shaped structure of Kongquehe slope, Tarim Basin
摘要
Abstract
Kongque slope is located in the northeastern part of Tarim Basin, and its formation is closely related to the south Tianshan and the Altun Mountain. Yuli fault nose-shaped structure, located in the northwestern part of Kongquehe slope, completely records the tectonic evolution of Kongquehe slope, the interpretation and analysis of the fault nose-shaped structure is very important to reveal the geodynamic settings of the northeastern margin of Tarim Basin since Early Paleozoic. Through the fine interpretation of the seismic profile across Yuli fault nose-shaped structural zone, using the theory of fault-related fold, this paper analyzed the tectonic features and the formation and evolution of the fault nose-shaped structure, and discussed the genetic mechanism. Yuli fault nose-shaped structure is a Paleozoic anticline in the NW-SE direction, which is cut by the late thrust from north to south. The northwest wing of the anticline is steep and the southeast wing is a little slow,the Upper Paleozoic strata of the anticline core are denudated. This structure mainly reflects the superimposition of three tectonic events: Middle to Late Ordovician,the NE-SW direction spreading anticline formed by the affection of the NW-SE direction stress; Silurian to Permian, being affected by the compressive stress generated in the subtractive and the closure of the south Tianshan ocean, the Yuli anticline became to the nose-shaped structure with the uplift and denudation of its northern part; Jurassic,the Early Yanshanian movement affected the Paleozoic and Mesozoic strata,and made the southward thrust whose strike direction is NWW removed, which offset the pre-exist nose-shaped structure. This research thinks the NE-SW direction spreading anticline of Yuli fault nose-shaped structure was being formed in Middle Ordovician, the principle stress may came from the Altun Mountain, southeast to Tarim Basin, the formation was related to the remote compression generated in the subduction and collision of the north Altun ocean in Caledonian; Combined with the basement imbricate structure breaking-forward northwestwardly, the anticline moved 104 kilometers northwestwardly, the basement shortened 48. 4% .关键词
断层相关褶皱/加里东运动/尉犁断鼻构造/孔雀河斜坡/塔里木盆地Key words
Fault-related fold/ The Caledonian movement/ Yuli fault nose-shaped structure/Kongquehe slope/Tarim Basin分类
天文与地球科学引用本文复制引用
刘阵,何登发,李涤,张宁宁..塔里木盆地孔雀河斜坡尉犁断鼻构造的构造特征与形成演化[J].地质科学,2012,47(3):588-606,19.基金项目
国家自然科学基金重点项目(编号:40739906)和国家重点基础研究发展计划"973"项目(编号:2006CB202300)资助. （编号:40739906）
