改进的Dias复电阻率模型在江西相山铀矿田中适用性研究  

The Applicability Study on Modified Dias Complex Resistivity Model to the Xiangshan Uranium Ore-field

作　　者：李冠男[1] 邓居智[2] 陈辉[1] 

机构地区：[1]东华理工大学核工程与地球物理学院,江西南昌330013 [2]东华理工大学放射性地质与勘探技术国防重点学科实验室,江西南昌330013

出　　处：《工程地球物理学报》2015年第6期732-740,共9页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金(编号:41164003;41404057);国家科技支撑计划(编号:2011BAB04B03)

摘　　要：复电阻率法是寻找固体矿产资源的有效方法,精确获取岩(矿)石的复电阻率参数,建立理想的复电阻率模型,对合理解释复电阻率法野外资料起着重要的作用。针对常用模型的缺陷,利用部分分式分解法,把Dias模型转化为一个Warburg模型和Debye模型的叠加模型。利用改进的Dias模型和Cole-Cole模型对相山铀矿田岩(矿)石标本的复电阻率实测数据进行反演拟合,比较了两种模型在描述岩(矿)石标本激电相应特征的适用性。结果表明,改进的Dias模型参数定义合理,与实测曲线拟合程度高,均方差与相关性数值较Cole-Cole模型优势明显,能准确描述岩石标本的激电相应特征。It is very effective to explore the solid mineral resources by the Complex Resistivity Method,which plays an important role in obtaining the parameters of rocks and minerals accurately,seting up an ideal complex resistivity model and explaining reasonably complex resistivity field data.The Dias model is conversed into a superposition model of Warburg and Debye after the analysis of the defects of other complex resistivity models by using the method of decomposition of the partial fraction.After that,the Modified Dias model and Cole-Cole model are used to fit the observed data of rocks from the Xiangshan uranium ore-field.The result shows that the parameters of Modified Dias model are defined clearly,the degree of fitting is much better than the Cole-Cole model.For the Modified Dias model,there are obvious advantages in Mean Square Error and the Correlation value.After all,it can accurately describe the IP corresponding characteristics of rock samples.

关 键 词：改进的Dias模型 COLE-COLE模型 相山铀矿田 复电阻率法 

分 类 号：P631.3[天文地球—地质矿产勘探]