资源描述：
《云南播卡金矿地质特征及构造控矿规律本科生毕业论文》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、云南大学本科生毕业设计(论文)题目：云南播卡金矿地质特征及构造控矿规律学院：资源环境与地球科学学院27摘要播卡金矿位于扬子地台西缘康滇地轴中南段的东北侧，近南北向小江深大断裂的西侧。小江深大断裂为矿区主干断裂，控制着播卡矿田、矿床的分布格局。形成于晋宁期的F3、F4断裂与小江深大断裂平行，在矿区组成了脆-韧性剪切带，播卡金矿的16条矿体都严格赋存于其中，为矿区内的导矿、容矿构造。形成于喜山期的F10～F21等近东西向断裂为成矿后构造，切割了南北向构造，对矿体具有破坏作用。本文在充分收集资料并在前人研究成果的基础
2、上，通过深入细致的野外地质调查和室内资料整理，运用构造地质学、岩石学、矿床学、地球化学等理论与方法。从构造地质背景入手，重点研究地层、构造、岩浆岩与成矿的关系。分析矿区的地质构造演化、矿床地质特征以及各种控矿因素，论证构造与成矿的时空关系，总结成矿规律并建立构造控矿模式。研究认为，本区金矿的形成受构造的严格控制。构造的控制作用贯穿了矿床形成的全过程，构造裂隙为矿液运移提供通道，同时也为矿体的堆积提供赋存空间，构造的各种形变与转换都与成矿流体的运移有密切的关系。关键词：播卡金矿；矿床特征；脆-韧性剪切带；控矿构造
3、27AbstractBokagolddepositislocatedinthemiddle-southKangdianaxisofitsnortheast,westmarginofYangziplatform,whichisonthenearwestsideofXiaojiangactivefault.Xiaojiangfaultisthemainfaultintheoredistrict,whichcontrolledthedistributionstyleofBokaorfieldandoredeposit
4、.TheF3andF4faultformedduringJinningperiodareparalleltoXiaojiangactivefault.Thesefaultsformedbrittle-ductileshearzoneandweremainlyconductiveandhoststructuresforthedeposits.TheF10～F21faultsofeast-weststrikewereformedduringXishanperiod,whichwerepostmetallogenic
5、structuresanddestructiveeffectfortheorebodies.Basedonthepredecessor'swork,theauthorgatheredgeologicalinformation,madefieldinvestigation,datacollectionandanalysis.Withthehelpoftheoriesofstructuralgeology,petrology,mineraldepositgeology,geochemistry,obtainsfro
6、mthegeotectonicbackground,focusedontherelationshipbetweenstratigraphy,tectonics,igneousrocksandmineralization.Analysisthetectonicevolution,geologicalfeaturesandavarietyofore-controllingfactorsofmine,toverifiedtherelationsofspaceandtimeofstructureandmineraliz
7、es,summarizedtheregularityoforeformationandstructuremineralizationmodel.Accordingtothesystematicstudies,theformationofgoldstrictlycontrolledbythestructure.Thetectonicfortheformationofthecontrolofmineralizationthroughoutthewholeprocessoforedepositformation.Th
8、etectonicfracturesnotmerelyprovideaccessfortheorefluidmigrationbutalsoprovideoccurrencespacefortheformoforebody.KeyWords:Bokagolddeposit;Depositcharacteristics;brittle-ductileshaearzone;Ore-cont
