东秦岭铅锌银金钼多金属成矿带成矿规律及找矿标志  

Metallogeny and mineral resource prospecting in the Pb-Zn-Ag-Au-Mo polymetallic ore belt of eastern Qinling

作　　者：朱广彬[1] 刘国范 姚新年[1] 杨振军[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]河南省第一地质勘查院,河南南阳470003

出　　处：《地球科学与环境学报》2005年第1期44-52,共9页Journal of Earth Sciences and Environment

基　　金：中国地质调查局国土资源大调查项目(199910200227)

摘　　要：　东秦岭位于华北板块与扬子板块之间的拼合带———秦岭造山带东段。该区是一典型的地球化学急变带与地球物理梯度交叉区,壳幔富含 Pb,Zn,Au,Ag,W,Mo元素,为一元古宙—古生代裂陷槽,熊耳群、宽坪群、二郎坪群、耀岭河组火山岩系中的火山喷发Cu,Pb,Zn,Ag,Au矿(化)层;秦岭群、官道口群、栾川群、陶湾群滨海、浅海陆缘碎屑碳酸盐建造中强烈的火山喷(气)发活动形成的硅质条带(团块)硅质岩以及含Ag,Pb,Zn,Au矿化层状矽卡岩带,多期次的构造岩浆活动,使区内 Pb,Zn,Ag,Au,W,Mo叠加富集体成矿,从而使东秦岭地区Pb,Zn,Ag,Au,W,Mo多金属矿床在区域分布、成矿空间、时间上呈现出一定的规律性和明显的找矿标志。Easterm Qinling between the North China and Yangtze plates is marked by both of the geochemical and geophysical gradient zones.The earth’s mantle and crust beneath the area are enriched in Pb,Zn,Ag,Au and Mo.Some volcanic lagers in the Xionger, Kuanping, Erlangping and Yaolinghe groups acted as the source bed for Cu,Pb,Zn,Au and Ag mineralizations. The Qinling, Guandaokou, Luanchuan and Taowan groups contain the shallow marine clastic carbonate formation in which an intensive volcanic eruption (exhalation) led to the formation of multi-layer chert bands (nodules), siliceous rocks and Ag,Pb,Zn and Au mineralized skarn belts.Certain episodes of structural and magmatic activities eventually resulted in the polymetallic concentration in eastern Qinling, which were identified by some spatial and temporal rules. These rules can be used for locating unknown mineral resources.

关 键 词：找矿标志 东秦岭 成矿带 成矿规律 元古宙 熊耳群 秦岭造山带 扬子板块 浅海 层状 

分 类 号：P618[天文地球—矿床学] P588[天文地球—地质学]