鄂尔多斯盆地北部沉积地质特征及成因分析

Analysis on sedimentary geological characteristics and genetic in northern Ordos Basin

鄂尔多斯盆地是我国重要的铀矿与天然气产区,对此区域进行地质勘探对于提升我国矿产资源产量具有重要意义,分析了鄂尔多斯盆地北部沉积地质特征及成因。使用野外勘测、样本采集、岩心观察、物性分析以及测井相分析等技术,探究了鄂尔多斯盆地北部沉积地质情况,详细分析了此区域3个断裂带的沉积构造、沉积物结构、沉积物测井相等地质特征,得到此区域沉积相特征以及形成原因。通过定性与定量分析,确定了鄂尔多斯盆地北部沉积类型较为丰富,整体沉积过程比较依靠水动力。丰富的天然气资源为矿物的生成提供了大量的氧化与还原剂,在形成沉积的同时生成大量铀矿,希望通过此次研究为日后找矿工作提供参考。

Ordos Basin is an important uranium and natural gas producing area in China.Geological exploration in this area is of great significance for improving the output of mineral resources in China.Therefore,the sedimentary geological characteristics and genesis of northern Ordos Basin were analyzed.Using techniques such as field survey,sample collection,core observation and physical property analysis and well logging facies analysis,the northern ordos basin sedimentary geological conditions were explored,geological characteristics of the three fault zones in this area were analyzed in detail including area of sedimentary structure,sediment structure,sediment equal logging to get the regional characteristics of sedimentary facies and formation reasons.Through qualitative and quantitative analysis,it is determined that the sedimentary types in northern Ordos Basin are abundant,and the overall sedimentary process is relatively dependent on hydrodynamics.Abundant natural gas resources provide a large number of oxidizing and reducing agents for the generation of minerals,and a large number of uranium deposits are generated at the same time of deposition.It is hoped that this study can provide reference for future prospecting work.