广西融水374矿床外围地电提取测量法找矿预测  

Prospecting Prediction Using Geoelectric Extraction in the Periphery of the No.374 Deposit in Rongshui,Guangxi

作　　者：张健 文美兰 叶武 蒋小明 谭江东 杨航 罗海怡 刘攀峰 蒋羽雄 ZHANG Jian;WEN Meilan;YE Wu;JIANG Xiaoming;TAN Jiangdong;YANG Hang;LUO Haiyi;LIU Panfeng;JIANG Yuxiong(College of Earth Science,Institute of Concealed Mine Prospecting,Guilin University of Technology,Guilin,Guangxi 541004,China;Guangxi Zhuang Autonomous Region 305 Nuclear Geological Brigade,Liuzhou,Guangxi 545007,China)

机构地区：[1]桂林理工大学地球科学学院隐伏矿床预测研究所,广西桂林541004 [2]广西壮族自治区三○五核地质大队,广西柳州545007

出　　处：《现代地质》2024年第1期214-223,共10页Geoscience

基　　金：国家自然科学基金项目(42163004);国家重点计划研发项目(2016YFC0600603)。

摘　　要：开展矿区外围找矿工作是矿山增储、缓解资源危机的有效手段。为了查明广西融水374铀矿床外围铀矿并圈定成矿预测靶区,本研究利用地电提取测量法进行探索。在含矿剖面开展找矿可行性试验,结果表明在已知矿体正上方能获得清晰的主成矿元素异常,示矿效果显著,说明利用该方法在研究区进行找矿是可行和有效的。通过对13种地电提取元素进行因子分析和聚类分析,获得F1(Pb-Zn-Ce-Eu-La-Nd-Yb)、F2(U-Th-As)、F3(Sb-W)、F4(Mo)4种元素组合因子并确定F2因子为研究区主成矿因子,F1因子为伴生因子。绘制F1和F2因子得分异常图,对元素组合异常的分布进行分析,发现w(U)/w(Th)>1/3的异常区域对寻找铀矿具有重要参考价值。根据单元素因子、F1因子、F2因子以及w(U)/w(Th)值异常特征,结合研究区地质背景,共圈定两处靶区,其中Ⅱ号靶区成矿前景更大,是进一步寻找隐伏铀矿的有利地区。To ascertain the uranium mineral ore-fields for the purpose of future exploration in the periphery of Guangxi Rongshui No.374 deposit,and further to delineate the target area for future prospecting,we carried out a prospecting study using geoelectric extraction and measurement techniques.At first,a feasibility test of ore prospecting was performed on a known ore profile,and the testing results show that clear anomalies of major ore-forming elements can be detected directly above the known orebodies,showing distinct ore-indicating effect.This test proved that this method is feasible and effective for local ore prospecting.Through the factor and cluster analysis of 13 elements extracted from geoelectricity,four element groups of F1(Pb-Zn-Ce-Eu-La-Nd-Yb),F2(U-Th-As),F3(Sb-W)and F4(Mo)were obtained,with F2 being the main factor in this study area,and F1 being the secondary factor.The abnormal distributions of those element groups were analyzed through drawing the abnormal scores of F1 and F2 factors,and we found that the abnormal distribution w(U)/w(Th)>1/3 is an important index for uranium prospecting.According to the characteristics of single element,F1 and F2 factor,and w(U)/w(Th)anomaly,and with combination of local geology,we delineated two target areas(I and II),of which target area II has a greater exploration potential for hidden uranium orebodies.

关 键 词：374矿床 地电提取 异常特征 找矿预测 广西融水 

分 类 号：P631.3[天文地球—地质矿产勘探]