塔里木盆地大地构造特征与油气远景新探

塔里本盆地自太古-元古代形成陆壳以来,经历了地槽;地台、地洼发展阶段,盆地现阶段大地构造性质属于中亚型地洼盆地。根据盆地周围地质和盆地范围重磁资料处理结果,结合新的地震、重力、钻井资料提出对盆地构造单元新的划分方案,即东西分区南北分带的思路;提出并论证了盆地中部存在一条自库车—于田的南北向构造带,它不但控制了盆地东西两区的构造演化差异,而且成为一条有远景的油气聚集带。

GEOTECTOIC CHARACTERISTICS AND OIL-GAS PROSPECTS OF TARIM BASIN

Since an ancient continental crust was established in Tarim Basin from Arehean to Proterozoic,ithas experienced geosyncline, platform and diwa stages and belongs geotectonically to a Central Asian type diwa basin.Using the data of geology and heavy magnetism in and aroundthebasin,with new seismic,gravity and drill data considered,the author proposes a dividing scheme of the tectonic units of the basin, i.e.two districts alongE-W and several belts along N-S are divided,and suggests that th.ere occurs a NS tectonic belt from Kuche to Yitian in the middle of the basin,This belt not only controls the differential evolution of the eastern and western districts in the basin, but also is a new frontier for oil and gas exploration,