摘要
呼图壁背斜位于准噶尔盆地南缘褶皱—冲断带的北部,属于天山向准噶尔盆地下方逆冲带的最前缘。基于全新的高精度三维地震资料,本文揭示了呼图壁背斜具有上下分层变形的特点,背斜发育双层滑脱的构造形态,浅层主要以古近系紫泥泉子组的石膏质泥岩为滑脱面,与上覆的古近系和新近系地层产生滑脱背斜;深层主要以侏罗系的八道湾组和西山窑组的煤层为区域性的滑脱面,产生侏罗系和上覆地层的断背斜构造,深浅层滑脱叠置,总缩短量达1 210 m。受二叠系隆凹构造格局的影响,石炭—二叠系古凸起对新生界的变形具有定形、定位的作用。利用ADS法定量分析和研究表明呼图壁背斜的形成经历了前期弱挤压构造运动,发育时间在新近纪,约23 Ma,后期为强烈的挤压构造运动,时间在7 Ma左右,呼图壁背斜的发育与南缘天山的期次隆起具有很好的响应。
Hutubi anticline is located in the north of the fold-and-thrust belts of the southern margin of the Junggar Basin, which is in the front of the thrust belt below the Junggar Basin of the Tianshan Mountains. Based on the new high-precision 3D seismic data, this paper reveals that the anticline has the characteristics of upper and lower layered deformation, and the anticline develops a structural form of double-layer slippage, and the shallow layer is mainly composed of the gypsum mudstone of Ziniquanzi Formation, which produces a detachment anticline with the overlying Paleogene and Neogene strata. In the deep layer, the coal seam of Badaowan and Xishanyao Formation of Jurassic is mainly the regional detachment surface, and the Jurassic strata and the faulted anticline structure of the overlying strata is produced. The deep and shallow layers are vertically superimposed, and the total shorting amount is 1 210 m. Affected by the tectonic pattern of the Permian uplift and concave, the Carboniferous and Permian paleo-uplifts have the role of shaping and positioning the deformation of the Cenozoic. Using the method of ADS for anticline of quantitative analysis and research, the results show that the Hutubi anticline experienced early weak extrusion tectonic movement, development time in Neogene, about 23 Ma, late for the extrusion of structural movement, at around 7 Ma. The development of Hutubi anticline has a good response to the uplift of the Tianshan Mountain.
作者
邓妤婷
何登发
张奎华
齐雪峰
Deng Yuting;He Dengfa;Zhang Kuihua;Qi Xuefeng(School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083;Research Institute of Exploration and Development,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257015;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083)
出处
《地质科学》
CAS
CSCD
北大核心
2023年第1期154-164,共11页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金企业创新发展联合基金项目“海相深层油气富集机理与关键工程技术基础研究”(编号:U19B6003)资助。
