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ID:51505160
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时间:2020-03-25
《河南老里湾银矿成矿地质特征及找矿方向.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第6期矿产保护与利用No.62016年l2月CONSERVATIONANDUTILIZATIONOFMINERALRESOURCESDec.2016河南老里湾银矿成矿地质特征及找矿方向张国跃’。黄诚唐春,李俊杰(1.河南省地质矿产勘查开发局第一地质勘查院,河南郑州450001;2.南昌工程学院,江西南昌330000)摘要:河南省洛宁县老里湾银矿的发现是崤山断隆东部地区重要的找矿成果。对老里湾银矿床的成矿地质背景、矿床地质特征及控矿因素等进行了详细的研究,认为构造条件是控矿的重要因素,矿体赋存在区内五条断裂带内的构造蚀变岩带中。矿化与岩浆岩分布有紧密联系,成矿元素沿似斑状二长花
2、岗岩内外接触带及断裂破碎带分布成矿,总体上在岩体上部形成不规则的矿化富集带。区内岩石蚀变强烈,由中心(断裂构造)向外(围岩)呈近于平行和对称分布的蚀变分带。结合区内化探异常成果,笔者认为矿区预测远景资源量有望新增为一个大型银矿和一个中型铅锌矿,且区域范围内具有继续寻找同类型矿床的潜力。关键词:老李湾银矿;找矿预测;成矿地质特征中图分类号:P612文献标识码:B文章编号: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崤山地区属豫西小秦岭一崤山一熊耳山一外方山金银钼多金属成矿带的一部分卜。其中,老里收稿日期:2016—04—06作者简介:张国跃(1960一),男,高级工程师,主要从事固体矿产勘查工作。通讯作者:黄诚(19
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