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Central Fujian Rift is another new and important volcanogenic massive sulfide Pb-Zn polymetallic metallogenetic belt. In order to find out the material genesis and mineralization period of Meixian-type Pb-Zn-Ag deposits, S and Pb isotope analysis and isotope geochronology of ores and wall rocks for five major deposits are discussed. It is concluded that the composition of sulfur isotope from sulfide ore vary slightly in different deposits and the mean value is close to zero with the 834S ranging from -3.5‰ to ＋5.6‰ averaging at ＋2.0‰, which indicates that the sulfur might originate from magma or possibly erupted directly from volcano or was leached from ore-hosted volcanic rock. The lead from ores in most deposits displays radioactive genesis character （206pb/204pb〉18.140, 207Pb/204pb〉15.584, 208pb/204pb〉38.569） and lead isotope values of ores are higher than those of wall rocks, which indicates that the lead was likely leached from the ore-hosted volcanic rocks. Based on isotope data, two significant Pb-Zn metallogenesis are delineated, which are Mid- and Late-Proterozoic sedimentary exhalative metailogenesis （The single zircon U-Pb, Sm-Nd isochronal and Ar-Ar dating ages of ore- hosted wall rocks are calculated to be among 933-1788 Ma.） and Yanshanian magmatic hydrothermal superimposed and alternated metallogenesis （intrusive SHRIMP zircon U-Pb and Rb-Sr isochronal ages between 127-154 Ma）. 相似文献
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早石炭世巴塔玛依内山组为一套陆相火山岩,下部以基性熔岩为主,上部以中酸性、酸性火山碎屑岩为主.岩石地球化学研究表明,区内火山岩呈高铝玄武岩-安山岩-英安岩-流纹岩钙碱性系列的演化趋势.从基性岩到酸性岩稀土模式相似,但铕负异常愈加明显.火山活动与金银矿成矿关系密切,玄武岩类、火山碎屑岩类Au、Ag、As含量较高,可能是成矿物源. 相似文献
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广西云开地区属我国粤西—桂东重要的金银多金属成矿带，区内有金银矿床（点）近８０处，受博白—岑溪深断裂带控制，产于前寒武系变质—混合杂岩内，沿ＮＥ、ＮＮＥ向呈带状展布。在论述该区金银矿成矿地质背景基础上，分析了构造控矿特征，赋矿地层及岩浆演化与金银矿化的关系，矿床成因类型及典型矿床地质特征，矿化富集规律等矿床地质特征。在总结该区金银矿成矿条件、找矿标志的基础上指出了找矿远景。 相似文献
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文章通过广西凤凰山银锰矿床中Ｓ－Ｆｅ－Ｃｕ－Ａｇ－Ｓｎ系列矿物黄锡矿、含银黄锡矿、银黄锡矿、硫银锡矿的化学成分标型、标型矿物组合特征的研究，为该矿床的成因、深部隐伏银矿化、矿区及其外围的找矿提供了一定的信息。 相似文献
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Central Fujian Rift is another new and important volcanogenic massive sulfide Pb-Znpolymetallic metailogenetic belt. In order to find out the material genesis and mineralization period ofMeixian-type Pb-Zn-Ag deposits, S and Pb isotope analysis and isotope geochronology of ores and wallrocks for five major deposits are discussed. It is concluded that the composition of sulfur isotope fromsulfide ore vary slightly in different deposits and the mean value is close to zero with the δ34S rangingfrom -3.5‰ to 5.6‰ averaging at 2.0‰, which indicates that the sulfur might originate from magmaor possibly erupted directly from volcano or was leached from ore-hosted volcanic rock. The lead fromores in most deposits displays radioactive genesis character (206Pb/204Pb>18.140, 207Tb/204Pb>15.584,208Pb/204Pb>38.569) and lead isotope values of ores are higher than those of wall rocks, which indicatesthat the lead was likely leached from the ore-hosted volcanic rocks. Based on isotope data, twosignificant Pb-Zn metallogenesis are delineated, which are Mid- and Late-Proterozoic sedimentaryexhalative metallogenesis (The single zircon U-Pb, Sm-Nd isochronal and Ar-Ar dating ages of ore-hosted wall rocks are calculated to be among 933-1788 Ma.) and Yanshanian magmatic hydrothermalsuperimposed and alternated metallogenesis (intrusive SHRIMP zircon U-Pb and Rb-Sr isochronalages between 127-154 Ma). 相似文献
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吉林溜河地区金矿化类型、控矿因素及找矿方向 总被引：4，自引：2，他引：4
溜河地区属太古宙高级变质区,出露岩石以灰色片麻岩为主,表壳岩稀少。据重磁资料解译成果,该区属构造岩浆活动带。区内常见金矿化类型有石英脉型、破碎蚀变岩型、隐爆角砾岩型和角砾岩型。初步总结出区内主要控矿因素是暗色岩系、中生代的岩浆活动、NW、NE方向的脆—韧性剪切带和断裂带,并指出了该区金矿的找矿方向。 相似文献
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