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1、2006年10月地球?qū)W報(bào)Oct.200627卷5期:471-478ACTAGEOSCIENTICASINICA27(5):471-478膠東金礦集中區(qū)構(gòu)造控巖控礦地質(zhì)特征研究呂古賢郭濤舒斌申玉科劉杜鵑周國發(fā)中國地質(zhì)科學(xué)院地質(zhì)力學(xué)研究所,北京,100081摘要本文對膠東構(gòu)造體系進(jìn)行了進(jìn)一步劃分,指出膠東中生代主要發(fā)育新華夏體系和華夏式構(gòu)造系,而緯向構(gòu)造體系,即EW向構(gòu)造不發(fā)育的資料。在此基礎(chǔ)上,對膠東金礦集中區(qū)構(gòu)造控制礦帶、礦床、礦脈、地球化學(xué)分布和物理化學(xué)條件等不同層次特征加以分析,提出的膠東金礦成礦期構(gòu)造具有多層次控礦特點(diǎn),新華夏系NEE向(泰山式)伴生構(gòu)造
2、控制膠東區(qū)域金礦帶的展布;新華夏系NNE向區(qū)域剪切帶控制金礦田產(chǎn)生部位;構(gòu)造帶斷裂性質(zhì)控制金礦礦床類別;構(gòu)造斷裂帶的產(chǎn)狀控制礦床礦體的傾伏側(cè)伏規(guī)律;剪切構(gòu)造兩盤的運(yùn)移特點(diǎn)和斷裂組合形式控制礦脈的分布規(guī)律;構(gòu)造變形巖相帶控制的構(gòu)造地球化學(xué)特征;構(gòu)造控制成礦物理化學(xué)條件等認(rèn)識(shí)。關(guān)鍵詞膠東金礦構(gòu)造多層次控礦構(gòu)造地球化學(xué)構(gòu)造物理化學(xué)GeologicalCharacteristicsofRock-controllingandOre-controllingStructuresintheJiaodongGoldOreConcentrationAreaLBGuxianGUOT
3、aoSHUBinSHENYukeLIUDujuanZHOUGuofaInstituteofGeomechanics,CAGS,100081AbstractThispapermadeafurtherdivisionoftheJiaodongtectonicsystem,andpointedoutthatthemainwell-developedtectonicsystemsinJiaodongareNeocathaysianandCathaysiantectonicsystemsratherthanthelatitudinaltectonicsystem.Ons
4、uchabasis,theauthorsanalyzeddifferentcharacteristicsoforebelts,deposits,oreveins,geochemicaldistributionandgeophysical-chemicalcon2ditionsintheJiaodonggoldoreconcentrationarea.Itisheldthatthestructureshavemulti-levelore-controllingcharacteristicsattheore-formingepoch.TheNNE-trending
5、Neocathaysianassociatedstructurescontrolthedistributionofregionalgoldbelts,theNNE-trendingNeocathaysianregionalshearbeltcontrolthegoldorefield,thefaultingconditionsofthetectonicbeltcontrolthetypesofgolddeposits,theattitudeofthetectonicbeltcontrolsthepitchingandrakeregularitiesoftheo
6、rebodiesinoredeposits,themovingpropertyoftheshearbeltandthecombinationformsoffaultscontrolthedistributionoforeveins,thetectono-deformedbeltscontrolthegeochemicalcharacteristics,andstructurescontrolthephysical-chemicalconditionsformineralization.KeywordsJiaodonggolddepositsmulti-leve
7、lorecontrolbystructuretectono-geochemistrytectono-physicochemistry膠東是我國重要的金礦集中區(qū)和黃金生產(chǎn)基1993,1999);中生代燕山早期構(gòu)造巖漿活化(170~地。該區(qū)金礦初步富集與古老的晚生代—元生代基134Ma)及其金進(jìn)一步富集形成的含礦熱液是直接性火山—沉積建造及其后的區(qū)域變質(zhì)綠巖帶有關(guān)礦源。這一成礦作用產(chǎn)生玲瓏—焦家式—剪切帶中(郭振一等,1983;張韞璞等,1988;裘有守等,1988;石英脈—細(xì)脈浸染狀蝕變巖型金礦床(呂古賢,姚鳳良等,1991;楊敏之等,1996)。然而在形成礦床
8、1991a),形成時(shí)代主要為晚燕山期(