参数筛选法在内蒙古扎赉特旗水系沉积物异常评价中的应用  

Application of parameter screening in the anomaly evaluation of stream sediments of Jalaid Banner, Inner Mongolia

作　　者：陈雷[1] Chen Lei(Anhui Exploration Technology Institute,Hefei 230031,Anhui,China)

机构地区：[1]安徽省勘查技术院

出　　处：《地质学刊》2019年第3期453-459,共7页Journal of Geology

基　　金：中国地质调查局地质调查项目“内蒙古扎赉特旗地区1∶5万化探”(1212011087057)

摘　　要：利用异常参数筛选法对扎赉特旗地区1∶5万水系沉积物异常进行评序,选择地球化学特征和地质背景特征两类评价指标分别进行合理赋值,然后按60%和40%分配权重计算异常评序总分。依据异常评序结果筛选了前8位异常进行查证,在HS-18、HS-21和HS-23三个异常区内发现了多处金、银、铜、铅锌等多金属矿(化)体,取得了较好的应用效果,表明异常参数筛选法可以避免人为经验筛选的主观性,是一种快速有效的异常筛选评价方法。The anomaly parameter screening method was used to evaluate and rate the stream sediment anomaly in Jalaid Banner at a scale of 1∶50,000.Two categories of geochemical features and geological background features were selected as evaluation indicators,respectively.After reasonable assignment,60%of geochemical features and 40%of geological background features were selected as weight factors to calculate the total score of anomaly evaluation.The first 8 anomalies were checked according to the evaluation results,and a number of polymetallic metal ore(mineralized)bodies such as gold,silver,copper and lead-zinc were found in the three regions of HS-18,HS-21 and HS-23.Good application results were obtained,indicating that the anomaly parameter screening method could avoid the subjectivity of manual screening.It is a fast and effective method of anomaly screening evaluation.

关 键 词：水系沉积物 参数筛选法 异常评价 内蒙古扎赉特旗 

分 类 号：P622.3[天文地球—地质矿产勘探]