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1、云南大學本科生畢業(yè)設計(論文)題目:云南播卡金礦地質(zhì)特征及構(gòu)造控礦規(guī)律學院:資源環(huán)境與地球科學學院專業(yè):地質(zhì)學指導教師:學生姓名:2015年5月27摘要播卡金礦位于揚子地臺西緣康滇地軸中南段的東北側(cè),近南北向小江深大斷裂的西側(cè)。小江深大斷裂為礦區(qū)主干斷裂,控制著播卡礦田、礦床的分布格局。形成于晉寧期的F3、F4斷裂與小江深大斷裂平行,在礦區(qū)組成了脆-韌性剪切帶,播卡金礦的16條礦體都嚴格賦存于其中,為礦區(qū)內(nèi)的導礦、容礦構(gòu)造。形成于喜山期的F10~F21等近東西向斷裂為成礦后構(gòu)造,切割了南北向構(gòu)造,對礦體具有破壞作用。本文在充分收集資料并在前人研究成果的基礎上,通過
2、深入細致的野外地質(zhì)調(diào)查和室內(nèi)資料整理,運用構(gòu)造地質(zhì)學、巖石學、礦床學、地球化學等理論與方法。從構(gòu)造地質(zhì)背景入手,重點研究地層、構(gòu)造、巖漿巖與成礦的關系。分析礦區(qū)的地質(zhì)構(gòu)造演化、礦床地質(zhì)特征以及各種控礦因素,論證構(gòu)造與成礦的時空關系,總結(jié)成礦規(guī)律并建立構(gòu)造控礦模式。研究認為,本區(qū)金礦的形成受構(gòu)造的嚴格控制。構(gòu)造的控制作用貫穿了礦床形成的全過程,構(gòu)造裂隙為礦液運移提供通道,同時也為礦體的堆積提供賦存空間,構(gòu)造的各種形變與轉(zhuǎn)換都與成礦流體的運移有密切的關系。關鍵詞:播卡金礦;礦床特征;脆-韌性剪切帶;控礦構(gòu)造27AbstractBokagolddepositisloca
3、tedinthemiddle-southKangdianaxisofitsnortheast,westmarginofYangziplatform,whichisonthenearwestsideofXiaojiangactivefault.Xiaojiangfaultisthemainfaultintheoredistrict,whichcontrolledthedistributionstyleofBokaorfieldandoredeposit.TheF3andF4faultformedduringJinningperiodareparalleltoXiao
4、jiangactivefault.Thesefaultsformedbrittle-ductileshearzoneandweremainlyconductiveandhoststructuresforthedeposits.TheF10~F21faultsofeast-weststrikewereformedduringXishanperiod,whichwerepostmetallogenicstructuresanddestructiveeffectfortheorebodies.Basedonthepredecessor'swork,theauthorga
5、theredgeologicalinformation,madefieldinvestigation,datacollectionandanalysis.Withthehelpoftheoriesofstructuralgeology,petrology,mineraldepositgeology,geochemistry,obtainsfromthegeotectonicbackground,focusedontherelationshipbetweenstratigraphy,tectonics,igneousrocksandmineralization.An
6、alysisthetectonicevolution,geologicalfeaturesandavarietyofore-controllingfactorsofmine,toverifiedtherelationsofspaceandtimeofstructureandmineralizes,summarizedtheregularityoforeformationandstructuremineralizationmodel.Accordingtothesystematicstudies,theformationofgoldstrictlycontrolle
7、dbythestructure.Thetectonicfortheformationofthecontrolofmineralizationthroughoutthewholeprocessoforedepositformation.Thetectonicfracturesnotmerelyprovideaccessfortheorefluidmigrationbutalsoprovideoccurrencespacefortheformoforebody.KeyWords:Bokagolddeposit;Depositcharacteristics;brittl
8、e-duc