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为揭示西湖凹陷煤系发育特征,对西湖凹陷和山东黄县盆地从构造和煤系特征等方面进行了研究,探讨了构造及演化对煤系发育的控制.研究成果表明:西湖凹陷与黄县盆地具有相似的构造动力学背景,中-新生代归属于滨太平洋构造域,受太平洋板块向欧亚板块运动、碰撞的动力学体制控制;西湖凹陷与黄县盆地构造演化具有同步性,断陷期盆缘主断裂控制了盆地的沉积;西湖凹陷构造演化可分为断陷-坳陷-区域沉降3个阶段,形成下断上坳的构造体系;与黄县盆地盆缘断裂控煤机制不同,西湖凹陷断陷期形成的同沉积构造坡折带控制了煤系发育,坡折带的规模、类型和构造组合样式是西湖凹陷平湖组煤系发育的主要控制因素,导致西部苏堤-初阳构造带、平湖构造带中部区域和广意亭-木香榭构造带中南部等盆内富煤构造区的形成.
In order to reveal the development characteristics of coal measures in Xihu Sag and to study the characteristics of tectonics and coal measures in the Xihu Sag and Huangxian Basin in Shandong Province and to discuss the control of the development of coal measures by tectonics and evolution, the results show that: The basin has a similar tectonic setting. The Meso-Cenozoic belonged to the Pacific Rim tectonic domain and was controlled by the dynamic system of Pacific plate movement and collision with the Eurasian plate. The tectonic evolution of the Xihu sag and Huangxian basin was synchronous, The basin-hosted faults controlled the sedimentation of the basin. The tectonic evolution of the Xihu sag can be divided into three stages of fault-depression-regional subsidence and formed the structural system of the lower fault-depression. Unlike the coal control mechanism of basin margin faults in Huangxian Basin The syndepositional slope-break zone formed in the depression of Xihu Sag controls the development of coal measures. The size, type and tectonic assemblage of slope break zone are the main controlling factors for the development of coal measures of Pinghu Formation in West Lake Sag. As a result, Yang tectonic belt, the middle part of Pinghu tectonic belt and the formation of the coal-rich tectonic zone in the basin, such as the middle and southern part of GuangXiTing-MuXiangXie tectonic belt.