白音查干凹陷桑合地区早白垩世都红木组一段沉积演化及物源研究

桑合地区是白音查干凹陷的一个重要含油区.其基础地质研究比较薄弱.综合运用岩心和录测井资料,结合区域地质背景,对白音查干凹陷桑合地区都红木组一段的沉积相类型及其分布、演化特征进行了全面系统的研究.结果表明,研究区都一段主要发育扇三角洲、湖泊和滑塌浊积扇三种沉积相类型.平面上从凹陷边缘至中心、垂向上自下而上,沉积物粒度由粗变细,沉积相由扇三角洲相、滨浅湖相渐变为半深湖一深湖相.利用岩石组分和重矿物成分进行物源分析,认为桑合地区沉积物来自凹陷北部的巴音宝力格隆起,并具有多期次、阵发性、近物源的特点,母岩岩性主要为沉积岩,其次为岩浆岩,见少量变质岩.

Sedimentary evolution and source provenance of the First Member of Lower Cretaceous Duhongmu Formation in Sanghe area, Baiyinchagan sag

Sanghe area is an important oil-bearing zone in the Baiyinchagan Sag.Oil exploration in the Baiyinchagan Sag has been carried out for many years,but fundamental geological data of Sanghe area remain insufficient.Based on a comprehensive analysis of core and logging data,regional geological setting,sedimentary facies types of the 1st Member of Lower Cretaceous Duhongmu Formation in Sanghe area of Baiyinchagan Sag, the authors made a systematical study of their distribution and evolution characteristics.The r...