凹陷盆地铜镍多金属矿床地电化学异常特征及找矿预测  

FEATURES OF GEO-ELECTROCHEMICAL ANOMALY AND COPPER-NICKEL PROSPECTING PROGNOSIS IN HOLLOW BASIN

作　　者：黄学强[1,2] 罗先熔[1,2] 刘巍[1,2] 王光洪[3] 黄蔚阁[1,2] 董艳秋[1,2] 

机构地区：[1]桂林理工大学地球科学学院,广西桂林541004 [2]广西地质工程中心重点实验室,广西桂林541004 [3]四川省冶金地质勘查局六〇五大队,四川彭山620860

出　　处：《物探与化探》2013年第2期199-205,共7页Geophysical and Geochemical Exploration

基　　金：国家深部探测计划项目(201011055-2);广西研究生教育创新计划资助项目(2011105960709M04)

摘　　要：为了尽快突破盆地寻找隐伏矿难题,选取河南南阳盆地的周庵矿床开展以地电化学方法为主的找矿示范及预测研究。示范研究显示,在已知矿体上方集中测出了明显的地电提取Cu、Ni、Co等异常及土壤离子电导率异常。盆地隐伏矿的地电化学异常有两个特征:在隐伏矿体两侧的边缘地段,往往分布一定规模的地电提取元素异常,两侧异常的中间地段指示矿体的赋存范围;土壤离子电导率异常在矿体上方以负异常为主,在边缘地段则出现对称的峰值异常。本区土壤热释Hg异常在矿体上以高强度单峰异常为主,在剖面上多呈不连续跳跃分布。根据以上特征,初步建立了河南南阳盆地隐伏铜镍矿床地电化学理想找矿模型,并在已知矿体外围开展隐伏矿预测研究,圈定了有利找矿靶区3处。In order to overcome the difficulties and make breakthrough in finding hidden deposits in the basin area,the author chose Zhouan ore deposit of Henan Province as the study object.The demonstration study in the known areas revealed clear anomalies of Cu,Ni,Co and obvious soil ionic conductivity directly above the known ore body.Two kinds of geoelectrochemical characteristics were observed in the basin area： On both sides of the concealed ore body,there exist element anomalies of certain sizes,and the middle section of anomalies on both sides indicates the location of the ore body.Above the ore body,the anomalies of soil ionic conductivity are mainly negative,and symmetrical peaks often appear on both sides of the ore body.In addition,the anomalies of Hg mainly assume high and single peaks and are distributed in the form of discontinuous jumps on profile.On such a basis,the authors set up an ideal geoelectrochemical prospecting model for nickel-copper deposits in Nanyang basin of Henan Province.In addition,the prognostic study was conducted in the peripheral zone,with three favorable targets delineated.

关 键 词：地电化学 铜镍多金属矿床 找矿预测 南阳盆地 

分 类 号：P632[天文地球—地质矿产勘探]