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1、第6期礦產(chǎn)保護與利用No.62016年l2月CONSERVATIONANDUTILIZATIONOFMINERALRESOURCESDec.2016河南老里灣銀礦成礦地質(zhì)特征及找礦方向張國躍’。黃誠唐春,李俊杰(1.河南省地質(zhì)礦產(chǎn)勘查開發(fā)局第一地質(zhì)勘查院,河南鄭州450001;2.南昌工程學院,江西南昌330000)摘要:河南省洛寧縣老里灣銀礦的發(fā)現(xiàn)是崤山斷隆東部地區(qū)重要的找礦成果。對老里灣銀礦床的成礦地質(zhì)背景、礦床地質(zhì)特征及控礦因素等進行了詳細的研究,認為構(gòu)造條件是控礦的重要因素,礦體賦存在區(qū)內(nèi)五條斷裂帶內(nèi)的構(gòu)造蝕變巖帶中。礦化與巖漿巖分布有緊密聯(lián)系,成礦元素沿似斑狀二長花
2、崗巖內(nèi)外接觸帶及斷裂破碎帶分布成礦,總體上在巖體上部形成不規(guī)則的礦化富集帶。區(qū)內(nèi)巖石蝕變強烈,由中心(斷裂構(gòu)造)向外(圍巖)呈近于平行和對稱分布的蝕變分帶。結(jié)合區(qū)內(nèi)化探異常成果,筆者認為礦區(qū)預(yù)測遠景資源量有望新增為一個大型銀礦和一個中型鉛鋅礦,且區(qū)域范圍內(nèi)具有繼續(xù)尋找同類型礦床的潛力。關(guān)鍵詞:老李灣銀礦;找礦預(yù)測;成礦地質(zhì)特征中圖分類號:P612文獻標識碼:B文章編號:1001—0076(2016)06—0012—05DOI:10.13779/j.cnki.issnl001—0076.2016.06.003ZHANGGuoyue,HUANGCheng,TANGChun。,LI
3、Junjief1.TheFirstGeo—ExplorationInstituteofHenanProvinceBureauofGeo—ExplorationandMineralDe—velopment,Zhengzhou450001,China;2.NanchangInstituteofTechnology,Nanchang330000,China)Abstract:ThediscoveryofLaoliwansilverdepositisanimportantore—searchingachievementinLuoningCounty,HenanProvince.Ont
4、hebasisofdetailedresearchonmetallogenicbackground,geologicalcharacteristicsandore—controllingfactorsofLaoliwandeposit,itcouldbeconcludedthattectonicconditionsaremajorore—controllingfactors,andore—bodiesoccuredinfivetectonicalteredrockbeltswithinthefaultzone.Mineralizationwascloselyrelatedto
5、magmaticrocks.Ore—formingelementsweredistributedintheinnerandoutercontactzoneofporphyriticmonzoniticgran—iteandfaultedfracturezones.Irregularshapedmineralizationenrichmentzonewasgenerallyformedinthetoppartofmagmaticrocks.Intensiverockalterationwaswelldevelopedwithinthedeposit.Alterationzona
6、tionwascharacterizedbyparallelandsymmetricaldistributionfromthecenter(frac—ture)totheoutside(wallrocks).Combinedwithgeochemicalanomalyresults,itcanbeconclu—dedthatadditiona1prospectiveresourcesinLaoliwancanincludealargesilverdepositandamedi—umlead—zincoredeposit.Furthermore,thereisahugepote
7、ntialforprospectingsametypesilverdepositsinLaoliwanandadjacentareas.Keywords:Laoliwansilverdeposit;predictionandexploration;metallogeniccharacteristics崤山地區(qū)屬豫西小秦嶺一崤山一熊耳山一外方山金銀鉬多金屬成礦帶的一部分卜。其中,老里收稿日期:2016—04—06作者簡介:張國躍(1960一),男,高級工程師,主要從事固體礦產(chǎn)勘查工作。通訊作者:黃誠(19