【摘要】 焉耆盆地中生代盆地性质一直存在争议,争议的焦点集中在早-中侏罗世盆地的性质。结合前人研究成果,主要利用博湖坳陷的地震资料,通过开展系统的地层构造解释,并选择4条骨架测线开展关键地质时期沉积盆地原形恢复,探讨其在侏罗系八道湾组(J1b)、三工河组(J1s)及西山窑组(J2x)沉积期末的盆地形态及性质。结果表明盆地在早-中侏罗世早期主要表现为弱扭压条件下的坳陷盆地。结合断裂系统平面展布特征和研究区所处构造位置,提出了研究区构造演化模式。更多还原

【Abstract】 It was still a controversial issue on the natures of Mesozoic basin in Yanqi Basin,it focused on its features in early-middle Jurassic system.In this paper,on the basis of predecessors’ studies,the seismic data from Bohu Depression were used for structural interpretation,4 regional seismic profiles were selected for stratigraphic correlation,identification and interpretation of faults,and then original structural shape of sedimentary basin was restored to find out some evidences to illustrate the basin’s nature and its original structural shape in early-middle Jurassic system(from J1b to J2s).The results show that Bohu Depression is a depression basin in relatively weak shearing compressive stress in early-middle Jurassic.In combination with the plain distribution of fault system and the position of the studied area,the structural evolution pattern in the area is proposed based on the distribution feature of fault system in the study area and its structural position.更多还原