鄂尔多斯双山地区七里沟砂岩沉积特征及演化

在野外剖面实测及室内资料分析的基础上,结合对砂岩的岩石学特征、粒度分析、沉积构造特征与垂向层序、地球化学特征及沉积体系展布特征等资料,研究了鄂尔多斯盆地双山地区太原组七里沟砂岩沉积特征,探讨了砂体沉积演化过程,建立七里沟砂岩沉积模式。七里沟砂岩形成于相对海平面下降时期的浅水三角洲沉积体系,陆源碎屑物质被河流不断向南搬运充填入盆地中,形成浅水三角洲、障壁砂坝—潮坪、陆表浅海在空间上共存的岩相古地理格局。

Sedimentary Characteristics and Evolution of Qiligou Sandstone in Shuangshan Area, Ordos Basin

Based on measuring the out section,the analysis of inner data,the petrologic character,the analysis of grain size,sedimentary structure,vertical sequence,geochemistryand distribution of sedimentary systems,the sedimentary characters of Qiligou Sandstone in Taiyuan formation in Shuangshan area are systematically studied,and the sedimentary model is established,the evolutionary process of sand sediment is discussed.The Qiligou Sandstone is the deposit of shallow water delta depositional system during the lows...