湖南大根垄钨多金属矿地电提取法机理  

Mechanism of Geoelectrochemical Extraction from Dagenlong Tungsten Deposit in Hunan

作　　者：欧阳菲[1,2] 罗先熔[2] 付立春 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]广西隐伏金属矿产勘查重点实验室/桂林理工大学隐伏矿床预测研究所,广西桂林541004 [3]黑龙江有色金属地质勘查研究总院,哈尔滨150046

出　　处：《吉林大学学报（地球科学版）》2015年第6期1879-1885,共7页Journal of Jilin University：Earth Science Edition

基　　金：中国地质调查局项目(2011-01-58-03);广西地质工程中心重点实验室开放基金项目(桂科能07109011-K013)

摘　　要：笔者以湖南大根垄钨多金属矿为试验研究区,以20m点距在已知矿体上方取土壤样,并按照24h提取时间、1 000mL HNO3提取液、50cm电极间距等工作条件进行了地电提取试验。结果表明,地电提取前后土壤中的元素含量变化不大,被提取到的金属元素应属土壤金属总量的一部分。次生晕与地电提取的异常形态对比发现:Co、Ni较清晰,W次之,Cr无异常;元素的异常特征主要取决于土壤中该元素的活性形式所占比例。综合分析认为地电提取异常与矿体的相对位置有关:矿体的下坡位置以及控矿断裂附近容易形成异常,距离原生矿体太近则会对异常有明显干扰。在本矿区,矿体风化程度越高对Co、Ni的地电提取异常越有利;其异常宽度一般比次生晕窄。In order to discover the mechanism and anomaly origin of geoelectrochemical extraction , an experimental study has already been conducted in Dagenlong Tungsten deposit in Hunan .We take soil samples by interval of 20 m ,and implement the geoelectrochemical extraction under the working conditions of the following three :the extracting time is 24 hours ,the dose of HNO3 is 1 000 mL ,and the distance between two electrodes is 50 cm . The result shows that the variation of metal element content is insignificant in soil after extracting ,and the extracted metal elements are proportional to the whole metal in the soil . The morphology comparison of anomaly between the geoelectrochemical extraction and the secondary halo shows that Ni and Co is clear ,W is less ,and Cr has no anomaly .The characteristics of anomaly mainly depend on the content proportion of element which is active in soil . Comprehensive analysis shows that the anomalies of geoelectrochemical extraction related to the relative position of the ore body .It is easy to form anomaly at downhill position ,and distance too close to native ore body have obvious interference to anomaly .In this ore deposit area ,the higher weathering degree , the better Co ,Ni anomaly of geoelectrochemical extraction .The anomaly width of geoelectrochemical extraction is smaller than secondary halo .

关 键 词：地电提取 钨多金属矿 湖南大根垄 异常特征 

分 类 号：P631.3[天文地球—地质矿产勘探]