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ID:51508662
大小:1.22 MB
页数:6页
时间:2020-03-26
《白日其利金矿找矿标志及前景分析.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24卷第3期中国矿业Vo1.24,NO.32015年3月CHINAMININGMAGAZINEMar.2015白El其利金矿找矿标志及前景分析何学昭,杨莎。,高彪,郁东良(1.青海省核工业地质局,青海西宁810000;2.中国科学院地球化学研究所,贵州贵阳550002)摘要:白日其利金矿产于秦祁昆晚加里东造山系、东昆中陆块之东昆中岩浆弧带中的破碎蚀变带中,属于典型的构造蚀变岩型金矿。本文详细介绍了白日其利金矿地质背景、成矿控制因素、矿化体特征、地球化学特征、找矿标志、深部预测六个方面。经综合分析,认为白日其利金矿区金水口岩群为赋矿源层,广泛发育的破碎蚀变带提供运
2、移通道,华力西一印支期中酸性侵入活动是形成该金矿床重要的热动力条件。最后对该区深部进行了原生晕分析,依据构造叠加晕模型,前缘晕元素与尾晕元素互相叠加,出现了反分带特征,一方面说明该区成矿具有多期叠加的特点,另一方面还说明深部还可能具有第二矿体富集带。关键词:自日其利金矿;地质背景;地球化学特征;找矿标志;找矿前景中图分类号:P624文献标识码:A文章编号:1004—4051(2015)03-0092-05ProspectingindicatorsandpotentialofBairiQiligolddepositHEXue—zhao,YANGSha,GAOBiao
3、,YUDong—liang(1.NuclearIndustryGeologicalBureauofQinghaiProvince,Xining810000,China;2.InstituteofGeochemistry,ChineseAcademyofSciences,Guiyang550002,China)Abstract:LocatedinthelateCaledonianQinling—Qilian-Kunlunorogenicbeltsandthefractured—alteredzoneinthemagmaticarcoftheeasternKunlun
4、Blocks,theBairiqiligolddepositisatypicalstructuralalteredrock—hostgolddeposit.Thispaperfocusesonthegeneralaspectsofthisdeposit,includingthegeologicalsetting,gatingfactorsofmineralization,characteristicsoftheorebodiesanditsgeochemistry,indicatorsofthedepositaswellasthepredictionofdeepb
5、linddeposits.AftercomprehensivegeologicalprospectingandevaluationontheBairiqiligolddeposit,itcanbeconcludedthatJinshuikouGrouphasbeentheore-hostingrockofthedeposit,whilethefracturedzoneservedasthemigrationpathwaywiththeVariscan—andIndosinianintermediate-acidicintrusionprovidesthetherm
6、odynamicconditionsrequiredduringitsmineralization.ThesuperpositionofthecostalhaloandtheretrialhalooccursandfeaturingreversezoningofthesehaloesafterdeliberatingoftheprimaryhalointhedeepzonebasedontheStructuralSuperimposedHaloModel(SHM),whichfurtherindicatethemultiple-phaseandsuperimpos
7、edmineralizationorpossibleoccurrenceofanotherconcentration(enrichment)oftheorebodies.Keywords:BairiQiligolddeposit;geologicalsetting;geochemicalfeatures;prospectingindicators;prospectingpotentia11地质背景中断裂带与东昆仑中新元古代一早古生代缝合带相白日其利金矿位于青海省格尔木市东南约隔L1]。区内出露地层主要是下元古界金水口岩群50kin处,大地构造位置隶属秦祁昆晚加里东
8、造山(Pt
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