优秀毕业论文毕业设计资源勘查工程-成矿规律、成矿模式研究

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1、夏家店金-飢矿床为产于黑色卅系中的典型矿床。金矿完全受层位、有利鲁性及构造的控制。金矿体呈扁豆状、透镜状、似板状筹。氧化矿屮金呈独立矿物存在，主耍以粒间金和裂隙金为主。围岩蚀变不发育，近矿围岩主耍有硅化、黄铁矿化等。根据金矿成矿作用方式分为沉积预富集期、构造一热液改造期和表生氧化富集期三个矿化期。金矿化石英脉流体包裹体II、0同位素组成特征暗示成矿流体来源于受到强烈改造的大气降水。钳族元素、硅同位索特征农明成矿物质具有多种来源，主要来自地层。根据金矿成矿特征、确定金矿床为沉积一改造型热液矿床。帆矿体矿体形态简单，呈层状，严格受黑色岩系层位控制，矿体沿走向、倾向品位、

2、厚度较为稳定。帆矿石大致可划分为①泥质硅板岩型、②碳质粘土岩型和③硅质碳质粘土岩型三种类型，均为层状构造，类型③^矿品位…般较高。通过X衍射等方法确定饥以饥云母、铁的氧化物、钛铁矿等形式存在。根据锐矿地质特征和成矿作用方式确定其为沉积成因。黑色岩系金呦矿成矿规律:黑色岩系产于孤岛状古隆起边缘断陷沉积盆地内,沉积的陆源与内源物质充足。黑色岩系富集Au,V等多种成矿元素，既是矿源层、也是容矿层。碳质硅质板岩与碳质粘土板岩交互层+含磷结核层过渡型岩段反映海侵和海退动荡的沉积环境，有利丁飢富集成矿以及金预富集和后期改造成矿。伽、V成矿作用方式不同。关键词:黑色岩系金矿；成矿

3、特征；成矿规律AbstractXiajiadiangold-vanadiumdepositisatypicaldeposithosedintheblackrockseriesandcontrolledbythestrata,favorablelithologyandstmcturc.Thegoldorcbodyislenticular,platy-like.Goldoccursasindependentmineralmainlyintheintergrainofquartzandfracture.Wall-rockalterationisweakandthemain

4、alterationtypesingolddepositsaresilicificationandpyritization.Thewatermostlycomesfromsti*onglyreconstructedmeteoricwater,accordingtothehydrogenandoxygenisotopescompositionofinclusionofthemineralizedquartz.OnthebasisofanalysisPGEandSiisotopes,itisshownthatthedepositsprobablycomefrommany

5、sources,butstratiunisthemainsource.Metallogeneticcharacteristicsindicatetheoredepositisalterativehydrothermaldeposit.Thevanadiumorebodies,whichhavebeencontrolledbythestrataofblackrockseries,aresimpiylayered.Orcgradeandthicknessarcstablealongstrikeandtread.Therearc3typesofvanadiumorc:©t

6、hcargillaceoussilicicslate-type,@thecarbonaceousclayrock-typeand(3)thecarbonaceoussilicicclayrock-type,usuallythevanadium-richone,allofthethreetypespresentmainlyastnictureoflayered.Vanadiumoccurredasroscoelite,ironoxideandsefstromiteetc.Sedimentarygenesisisdetenninedbythefeaturesandmin

7、eralizationwaysoftheVanadiumdeposit.Metallogeneticregularitiesofgold-vanadiumminemlizationhostinblackrockseries:Tlieblackrockseriesoriginatefromthefaultbasinandonthemarginofisolaltedpaleo-uplift,inwhichthereweresuftcientsedimentaiysubstancesofterrestrialsourcesandendogenoussources.Th