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通过分析前人沉积体系研究成果与勘探现状的矛盾,认为安塞地区只发育北东部物源体系的认识存在不足。在区域地质背景、泥岩颜色、重矿物组合分析、高变质岩岩屑的分布等单因素分析的基础上,提出了安塞地区沉积体系分布模式,完成了长613小层沉积相分布图,提出了安塞区存在北西部和南东部2个物源体系的认识。
By analyzing the contradiction between the research results of the predecessor sedimentary system and the exploration status quo, it is concluded that there is a lack of understanding of the source system only developed in the north east of Ansai. On the basis of single factor analysis such as regional geological background, mudstone color, heavy mineral assemblage analysis and distribution of high metamorphic rock fragments, the distribution pattern of sedimentary system in Ansai area is proposed, and the sedimentary facies distribution map of Chang 613 layer is completed. In Ansai district, there are two provenance systems in North West and South East China.