摘要
为优选陕西碑坝地区的找矿靶区,开展了1∶10000地质草测,在了解该区地质特征的基础上进行了1∶25000土壤地球化学测量工作,并对测量数据(变异系数、富集系数等)进行了统计分析;运用SPSS软件对数据进行聚类分析、因子分析,在此基础上确定出工作区的元素异常组合;利用衬度异常法确定出各元素的异常下限,采用因子得分异常图表达元素组合异常特征。结果表明,土壤样品的Au、Cu、Mo等元素含量较高,变异系数较大,与秦巴地区土壤的背景值相比明显偏高;具有较高含量的元素异常主要分布在中元古界火地垭群麻窝子组出露区且与朱家湾断裂关系密切;本次研究圈定出的Ⅰ类野猪塘-李洞沟综合异常Au-Ag-Cu-Zn-Ni-W-Mo找矿靶区,经工程验证,新发现了野猪塘金矿体。研究显示,应用土壤地球化学勘查方法可以有效的为找矿工作提供指导。
In order to optimize mineral prospecting targets in the Beiba area of Shaanxi Province,the 1∶10000 geological survey and the 1∶25000 soil geochemical survey of the Beiba area have been carried out on the basis of understanding the geological characteristics of the Beiba area.Characteristics of the measured data(coefficient of variation,enrichment coefficient,etc.)were statistically analyzed by applying cluster analysis and factor analysis with SPSS software.This led to the determination of integrated soil geochemical anomalies of associated elements in the study area.The lower limits of various elements of integrated anomalies were determined by using the contrast value anomaly method.The characteristics of integrated anomalies of associated elements are shown by using anomaly chart of factor scores.The results show that the soil samples have relatively high contents of Au,Cu,and Mo with relatively large coefficient of variation.Those Au,Cu,and Mo contents are obviously higher than those of the background values of soils in the Qinba area.Anomalies of relatively high content elements are mainly distributed in the outcropped area of the Mawaozi Formation of the Middle Proterozoic Huodiya Group and are closely related to the Zhujiawan fault.Thus,the Yezhutang-Lidonggou Au-Ag-Cu-Zn-Ni-W-Mo comprehensive anomaly has been delineated by this study as a ClassⅠprospecting target in which the Yezhutang gold orebody was discovered through the engineering verification.Therefore,it is believed that the application of soil geochemical exploration method can effectively provide guidance for the further mineral prospecting.
作者
黄文斌
罗先熔
贾飞
王伟
郑超杰
杨笑笑
何旺
HUANG Wen-bin;LUO Xian-rong;JIA Fei;WANG Wei;ZHENG Chao-jie;YANG Xiao-xiao;HE Wang(College of Earth Science,Institute of Hidden Deposit Prediction,Guilin University of Technology,Guilin Guangxi 541004,China;Shaanxi Institute of Regional Geology and Mineral Resources,Xianyang Shaanxi 712000,China)
出处
《矿物岩石地球化学通报》
CAS
CSCD
北大核心
2019年第6期1110-1117,共8页
Bulletin of Mineralogy, Petrology and Geochemistry
基金
国家重点研发计划项目(2016YFC0600603,2017YFC0602604HT02)。
关键词
土壤地球化学
衬度异常法
因子得分异常
找矿预测
陕西汉南
soil geochemistry
contrast value anomaly method
anomaly of factor score
ore-prospecting prediction
the southern Hanzhong of Shaanxi Province
