【作者】 王谦身； 江为为； 武传真； 焦灵秀；

【Author】 Wang Qiangshen Jiang Weiwei Wu Chuanzhen Jiao Lingxiu (Institute of Geophysics,Chinese Academy of Sciences)

【机构】 中国科学院地球物理研究所；

【摘要】 根据塔里木盆地现有重力与地震资料、以及新生代沉积层资料,给出了盆地深部重力异常场,指出盆地周边存在梨状环形重力异常陡变带和盆地内为重力异常相对缓变区,并有巴楚重力异常陡变小环形带的特征.应用重力数据给出盆地地壳厚度分布,提出盆地周边和巴楚隆起边缘存在地壳厚度陡变带,盆地内部为地壳厚度缓变区,以及存在巴楚、尉犁地幔相对隆起区的地壳构造特征.讨论并提出盆地边缘地壳厚度陡变带和内部地壳厚度缓变区的地壳较薄的次级构造域内是有利的油气储集的远景地带和地区.更多还原

【Abstract】 According to the available data of gravity,seismic and Cenozonic sedimentary basin’s thickness and density,the deep gravity field of Tarim basin was obtained.It is indicated that there are the gravity gradient zones of the pearshaped circular around basin areas and the relatively gentle region of gravity anomaly in the inner basin,and there are small circular particularities of gravity gradient zones in Bachu region.The distributions of the basin’s crustal structure were given by using gravity data.It is presented that there are crustal thickness gradient zones in the basin’s surroundings and in the margin of Bachu uplift area,in the inner basin there is a gentle region of crustal thickness,and in Bachu and Weili regions there are crustal structure properties of mantle relative uplift.This paper discusses and presents the idea that there are promising zones and areas to be favourable for oil-gas resources in the secondary structure regions of thinner crustal thickness in both margin and interior of the basin.更多还原