论文部分内容阅读
位于祁连山东段的宝积山—红会盆地是一个典型的侏罗纪沉积盆地,侏罗纪煤系由冲积扇沉积体系,经过河流、湖泊三角洲沉积体系向湖泊沉积体系过渡的沉积序列组成,并充填于印支运动后的裂陷盆地内。盆地活动断裂边界的内侧发育冲积扇裙,向着不活动边缘的另一侧,逐渐被河流沉积体系和湿地沼泽系统替代。扇前湿地是主要聚煤场所,形成的煤层层数少,主煤层厚度变化大,煤体呈简单指状。扇前湿地泥炭沼泽具有富滋养或低位性质,形成的煤层灰分产率高,硫含量有明显的分带性,其变化取决于泥炭沼泽与冲积扇体的相应空间位置。
The Bajishan-Honghui Basin, located in the eastern segment of the Qilian Mountains, is a typical Jurassic sedimentary basin. The Jurassic coal measures are composed of alluvial fan sedimentary system and sedimentary sequence of river-lake delta sedimentary system transition to the lake sedimentary system and are filled After the Indosinian rift basin. Alluvial fan skirts developed on the medial side of the active fault boundaries of the basin and gradually replaced by river sedimentary systems and wetland marsh systems toward the opposite side of the inactive margin. Before the fan wetland is the main place for coal gathering, there are few coal seam layers formed, the thickness of the main seam varies greatly, and the coal body has a simple finger shape. The former wetland peat swamp is rich or nourished or low quality. The formed coal seam has high ash content and obvious sulfur content. Its variation depends on the corresponding spatial position of peat swamp and alluvial fan body.