巴彦浩特盆地中央隆起带成因机制及油气远景初探

Discussion for Origin Hydrocarbon Potential of the Central Uplift in Bayanhaote Basin

摘要: 巴彦浩特盆地是一个上叠于阿拉善地块之上的垂向复合盆地，中央隆起带纵贯盆地中部。研究表明：中央隆起带的形成是多期构造作用的结果，该隆起带本身是在一古隆起背景上发育起来的，其南段（以格口乌苏凸起为主体）是一与祁连山冲断－褶皱带自晚古生代以来向北北东方向的逆冲作用相关的前缘隆起（forebulge）；其北段（以淖尔套凸起为主体）是一与中新生代以来的断陷活动有关的地垒构造；而隆起带中段（以塔布阿勒凸起、沙特图凸起为主体）遭受的应力作用软弱，隆起幅度相对降低。中央隆起带具有较好的油气前景，其有利油气聚集区及圈闭类型分别为：隆起带北段的伸展断块型圈闭、南段的挤压背斜型圈闭及隆起东侧斜坡上的地层不整合圈闭。

Abstract: Bayanhaote basin is a vertical complex basin which was superimposed on Alxa massif. Its central uplift with better hydrocarbon potential result from multistage tectonic movement. Its favorable hydrocarbon accumulation belt and trap types include extentional fault block traps in the northern, compresional anticlinal traps in the southern and stratigraphic unconformity traps in the eastern.