塔里木中新生代前陆盆地构造分析与油气领域

TECTONIC ANALYSES AND HYDROCARBON DOMAINS IN THE MESOZOIC AND CENOZOIC FORELAND BASINS OF TARIM

丁道桂 刘伟新 崔可锐 王道轩 孙世群

Ding Daogui Liu Weixin Cui Kerui Wang Daoxuan Sun Shiqun

地矿部石油地质中心实验室, 无锡, 214151 2. 合肥工业大学地质系

Central Lab of Petroleum Geology, MGMR 2. Department of Geology, Hefei Polytechnical University

塔里木中新生代库车一拜城、喀什一叶城前陆盆地的形成与演化是与特提斯洋关闭、印度板块对欧亚板块的俯冲、碰撞所产生的远程效应相联系的,主要是:塔里木盆地基底向周缘的西昆仑、天山造山带陆内俯冲形成地壳叠加楔;造山带逆冲岩席向盆地的大规模推覆;盆地基底挠曲沉降形成挤榨前渊。通过大量的组构分析和三维有限应变测量,计算了造山带向盆地的推覆距离、前陆盆地的递进变形方式和压缩量以及所形成的圈闭类型和油气领域。

The formation and evolution of Mesozoic and Cenozoic Kuche-Baicheng and Kashi-Yecheng foreland basins in Tarim are related to the close of Tethys and long-range effects produced by the subduction and collision of Indian plate to Eurasian plate. It is mainly showed that the basement of Tarim Basin subducted intracontinentally to peripheral West Kunlun and Tianshan orogenic belts to form crust-stacked wedges, the thrust sheets of orogenic belts napped basinward in a large scale, and the basement of the basin flexurally subsided to form compressional foredeeps, By a large amount of fabric analyses and three-dimensional finite strain measures, the basinward napping distance of orogenic belts, the progressive metamorphic patterns and compressed volume of foreland basins and the trapping types and hydrocarbon domains formed are calculated.

https://doi.org/10.11781/sysydz199702097