【摘要】 收集前人研究成果,结合薄片鉴定、重矿物分析、稀土元素及地震等资料,对鄂尔多斯盆地延长组长7沉积期物源进行分析.结果表明:镇北地区延长组长7物源来自盆地西部和西南方向,其中西南物源为主要物源区,主要岩性为变质岩、中酸性岩浆岩;西部方向仅为沉积区提供白云岩等碳酸盐岩碎屑.更多还原

【Abstract】 Based on previous research and the references concerning thin section identification,heavy mineral analysis,rare earth elements and seismic data,we give an analysis of Chang 7 sedimentary provenance in Ordos Basin.The result shows that Chang 7 source in Zhenbei area is from the west and southwest of the basin.The main provenance is the southwest area where the major lithology is that of metamorphic rocks and intermediate-acid magmatic rocks.The west area is only the sedimentary provenance where dolomite and other carbonate rock debris are found.更多还原