准噶尔盆地东部边缘区构造格架及构造样式

Tectonic Framework and Stucutral Patterns in Peripheral Eastern Junggar Basin

在研究准噶尔盆地东部边缘地区区域构造的基础上，确定出研究区具有北西向为主的晚海西运动期断裂体系、北东向为主的印支－燕山运动期断裂体系和近东西向喜马拉雅运动期断裂体系，并论述了三种断裂体系的形成与分布。根据区内构造活动史，按构造卷入程度，将区内构造样式分为基底卷入型和盖层卷入型两大类八个亚类，并论述了各类构造样式的形成、演化及分布。最后，按构造演化特点和盆地发育史，论述了构造控油的论据，认为研究区北部和东部的油气保存条件、油气资源量丰度、烃源岩演化，均不及吉木萨尔凹陷，基底卷入型构造样式是影响区内油气聚集与分布的主要因素；吉木萨尔凹陷是研究区目前较现实的勘探领域，红旗断块、吉中背斜等应是近期油气勘探的靶区。

： Based on the study on the regional structure in peripheral areas in eastern Junggar Basin， the authors identified that the study area are dominated by the north－west trending fault system in late Hercynian orogeny， northeast bending fault system in the Indo－China－Yanshan movement and pro－east－west trending fault system in Himalayan movement． In addition， it also made discussions on formation and distribution of three types fault systems． According to the tectonic history in the region and extent of tectonic involvement， the tectonic styles here are classified into two major categories， namely， basement involvement and cap formation involvement， with＆ subtypes． The paper also indicated formation， evolution and distribution of different types of tectonic styles． Lastly， with view to the evolution characteristics and development history of the basin， the paper made discussion on the basis and evidence of the control of structures over oil generation， and demonstrated that the hydrocarbon Preservation condition， hydrocarbon resource amount per unit and evolution of hydrocarbon source rocks in the north and east of the study area are at a disadvantage comparing with those of Jimsar sag． It is concluded that the basement involvement structural type is the dominant factor affecting the oil and gas accumulation and distribution in this area， and that Jimsar sag should be a practical district for exploration at present in the study area， and Hongqi fault block， Jizhong anticline ought to become the target for near－future exploration．