大港探区中生代盆地构造特征及演化

EVOLUTION AND TECTONIC CHARACTERISTICS OF THE MESOZOIC BASIN IN DAGANG PROSPECT AREA

杜旭东 漆家福 陆克政 付立新

DU Xu-dong QI Jia-fu LU Ke-zheng FU Li-Xin

北京4351#中抽测井, 北京 100043 2. 石油大学(北京)构造研究室, 北京 102200 3. 大港油田有限集团公司, 天津 300270

China National Logging Corporation, P.O. Box 4351, Beijing 100043, China 2. Tectonic Research Branch, University of Petroleum, Beijing 102200, China 3. Dagang Petroleum Limited Group Company, Tianjin 300270, China

大港探区中生代构造样式有伸展、挤压、走滑、调节以及与火山岩有关的构造样式。早、中保罗世构造亚层以挤压为主,以发育孔西潜山构造为特征;晚侏罗世-早白垩世构造亚层以弱伸展为主,断坳、盆地共存,并有强烈的火山活动;晚白垩世构造亚层以弱隆起为主,盆地分布局限。侏罗纪-白垩纪的盆地时空分布和变形特点与盐山-歧口-新港隐伏断裂带和中生代论东断裂带有关。变形动力学受控于伊泽奈崎板块的小角度斜向俯冲和扬子板块与华北板块陆陆碰撞造成的挤压背景。

The Mesozoic tectonic styles in Dagang prospect area include stretch,compression,strike-slip,adjustment and those related to volcanic rock.The Early and Middle Jurassic tectonic sublayer dominated by compression has the characteristics to develop the Kongxi buried-hill structure;the Jurassic-Cretaceous tectonic sublayer dominated by weak stretch has concurrent fault depressions and basins,and has strong volcanic activities;and the Late Cretaceous tectonic sublayer dominated by weak uplift has limited distribution of basins.The time and space distribution of the Jurassic-Cretaceous basins and their deformational characteristics are related to Yanshan-Qikou-Xingang buried faulted zone and the Mesozoic Cangdong faulted zone.The deformational dynamics is controlled by the compressional settings which are caused by the minor-angle oblique subduction of the Izanagi Plate and the continent-to-continent collision betneen the Yangtze Plate and the North China Plate.

https://doi.org/10.11781/sysydz200002125