【摘要】 根据二维地震剖面的分析得出,酒泉侏罗纪盆地属于伸展盆地,而非前陆盆地,主要是由一系列的断陷组成,主体东断西超,由一系列北东或北北东向的正断层形成.盆地的北部边界与现今边界大致一致,位于北山南面的山前地带,南部边界的主体位于北祁连山下,距离现今边界以南25～30km处,部分地段位于现今边界以北15～20km处.各断陷中沉积了厚300～1800m的含煤沼泽相侏罗系沉积,煤层厚度大、分布广.煤及泥岩是良好的生油岩,砂、砾岩是良好的储油层,因此煤与油气资源都很丰富.更多还原

【Abstract】 The structure interpretation on two-dimension seismic profiles indicated that the Jurassic Jiuquan basin belongs to the stretch basin and is composed of many dustpan-like fault sags, which are formed by lots of normal faults tending towards a NE or NNE direction. The fault sags which has a Jurassic coal-bearing deposits of 300～(1 800 m) in thickness which belongs to a swamp facie, are mainly distributed in the two regions of Jiuxi and Jiudong. Furthermore, the Jurassic basin has a similar north margin but a different south margin compared with the present basin. Its north margin locates in the front of the Beishan mountain, and its south margin lies under the northern Qilianshan mountains at a distance to the south of 25～30 km from the present margin in the most places, but in the Maying region of eastern basin it lies in the front of the northern Qilianshan mountain at a distance of 15～20 km from the present margin. Finally, the coal and oil resources in Jiuquan basin are also very plentiful, because the coal and mudstone are the good oil source rocks and the sandstone and conglomerate are the ideal reservoirs.更多还原