综合物化探方法在滇南勐腊南坡铜矿找矿勘查中的应用

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1、综合物化探方法在滇南劭腊南坡铜矿找矿勘查中的应用摘要：文章结合区域成矿地质背景，以砌腊县南坡铜矿床地质勘查成果资料为依据，通过对矿床铜矿石进行主量元素、微量元素、稀土元素及土壤地球化学特征进行测定，并对矿区矿/岩石地球物理特征及激电中梯进行分析，结合矿区成矿地质条件及矿床地质特征，发现：①矿石与围岩主量元素基本一致，微量元素（除Ba、Zr>Hf）则于矿体中呈现不同程度富集,稀土元素表现为负Eu异常-§Ce无明显异常-轻稀土富集型，均表明成矿物质主耍源口围岩地层，外来热液流体改造作用微弱，与矿化/体严格受地层控制的地质事实吻合；②土壤地球化学元素中，Ag、As、Pb相对富集

2、，Ag与Cu套合性最高，与矿床成因关系密切；③硫化铜矿石显示高极化、中电阻率特征，与围岩低极化率特征差异显著；④根据物化探异常的分布位置及展布形态，结合矿区地质实际，确定综1异常及综2异常具有较好的找矿潜力，圈定矿区北延为找矿前景区。Abstract：Thispaperdiscussedthecharacteristicsofmajorelement,traceelement,rareearthelementsandgeochemicalcharacteristicsofsoilsthroughthesummaryoftheregionalgeologicalbackgr

3、oundandgeologicalexplorationresults・Inaddition,theauthoridentifiodthegeophysicalcharacteristicsofore/rockandinduced-currentmiddle-gradient.Combinedwiththeresearchofore-forminggeologicalconditionsandgeologicalcharacteristicsofdeposit,theresuItsshowedthat：①Themajorelementsoforeandsurroundin

4、grockwerebasicallyidentical,butthevalueoftraceelements(excepttheBa,ZrandIlf)withdifferentdegrees・Inaddition,therareearthelementswascharacterizedwithElianomaly,whilethe8Cohaslessobviousanomaly-LREErichtype.Thesegeochemicalfeaturesindicatedthattheoreformingmaterialsourcewasmainlyadjacentroc

5、ksstratum,whichhastheweaktransformationeffectofhydrothermalfluid.Thisphenomenonshowedtheconsistencyofthegeologicalconditionthatthemineralization/orebodyhavebeencontrolledbystratum.②Thestudyofsoi1geochemicalshowedtheenrichmentofsilver,arsenicandlead・Thesilverandcopperhavethebestregistratio

6、nwhichexhibitedacloselyrelationshipforthegenesisofdeposit.③Thecoppersulphideorehascharacterizedwiththehighpolarizabilityandmiddleresistivitywhichisobviouslydifferentfromtheresistivityfeatureofsurroundingrock.④Theexplorationprospectregionwasproposedaccorditothedistributionlocationandthespa

7、tialformofgeophysicalandgeochemicalanomaly,geologicalsituationofminingarea・TheauthorholdsthattheNo.1comprehensiveanomalyandNo.2comprehensivcanomalyhavethebetterprospectingpotential.关键词：铜矿；地球化学；激电中梯；南坡；滇南Keywords:copperdeposit；geochemical；induced-currentmiddle-gradie