准噶尔盆地北三台地区侏罗系头屯河组沉积物源分析

为明确准噶尔盆地北三台地区头屯河期物源体系，应用砂砾岩含量分析法、重矿物组合分析法，在计算头屯河组剥蚀厚度基础上，恢复头屯河期原始地貌，综合判断研究区的主要物源方向; 认为北三台地区侏罗系头屯河组沉积物有两个物源体系，分别是北部沙奇凸起方向和南部博格达山。北三台凸起在头屯河期为水下低凸起，并不提供物源。

Sedimentary source analysis of Jurassic Toutunhe Formation in Beisantai area in Junggar Basin

For definition of the source system of Jurassic Toutunhe Formation in Beisantai area of Junggar Ba- sin, the authors calculate the erosion thickness of the Formation, restore the palaeogeomorphology during this For- mation, and judge the source direction in the studied area, using sandstone content and heavy mineral combination analysis methods. The deposits of the Toutunhe Formation have two source systems in Beisantai area, including Shaqi uplift in the north and Bogurda mountain in the south. The Beisantai uplift was underwater low uplift during the Toutunhe Formation, and did not provide source.