长江中下游成矿带抛刀岭大型斑岩型金矿特征及找矿前景
抛刀岭金矿位于长江中下游成矿带安庆-池州矿集区,累计金金属量大于22 t ,为池州地区首例大型金矿床。该矿床金矿体主要产在英安玢岩中,基本不伴生其他有益金属元素,为独立金矿床。通过详细的矿床地质特征描述,结合已有斑岩型金矿的成矿模式,同时利用以往对该含矿岩体U-Pb锆石定年及相关地球化学研究,综合分析认为该矿为产在早白垩纪岛弧背景下的贫铜斑岩型金矿床,同时局部矿段在成矿过程中还经历了热液叠加作用。矿体产出严格受 NE向构造岩浆岩带控制,含矿岩体出露面积小于1.0 km^2,属于典型的小岩体成大矿。运用“相似类比”、“矿床谱系”、“趋势外推”、“综合信息评价”等原则,指出该矿具有特大型金矿的潜质...
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          | Published in | 地球科学与环境学报 Vol. 36; no. 1; pp. 161 - 170 | 
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| Main Author | |
| Format | Journal Article | 
| Language | Chinese | 
| Published | 
            中国人民武警黄金第七支队,山东 烟台 264004%中国科学技术大学 地球和空间科学学院,安徽 合肥,230026
    
        2014
     中国科学技术大学 地球和空间科学学院,安徽 合肥 230026  | 
| Subjects | |
| Online Access | Get full text | 
| ISSN | 1672-6561 | 
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| Summary: | 抛刀岭金矿位于长江中下游成矿带安庆-池州矿集区,累计金金属量大于22 t ,为池州地区首例大型金矿床。该矿床金矿体主要产在英安玢岩中,基本不伴生其他有益金属元素,为独立金矿床。通过详细的矿床地质特征描述,结合已有斑岩型金矿的成矿模式,同时利用以往对该含矿岩体U-Pb锆石定年及相关地球化学研究,综合分析认为该矿为产在早白垩纪岛弧背景下的贫铜斑岩型金矿床,同时局部矿段在成矿过程中还经历了热液叠加作用。矿体产出严格受 NE向构造岩浆岩带控制,含矿岩体出露面积小于1.0 km^2,属于典型的小岩体成大矿。运用“相似类比”、“矿床谱系”、“趋势外推”、“综合信息评价”等原则,指出该矿具有特大型金矿的潜质;同时,受同一 NE向构造控制的乌石、白虎山及自来山等同期岩浆岩发育地区,具有与抛刀岭金矿类似的成矿条件,是未来工作的重点靶区;发育于上述同期岩浆岩之间的志留纪地层中的破碎带蚀变岩、与斑岩型矿床配套产出的低温热液多金属硫化物型矿床等,都将是外围工作的重点研究地区。 | 
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| Bibliography: | 61-1423/P Paodaoling gold deposit is located in Anqing-Chizhou ore concentrated area of the middle-lower Yangtze River metallogenic belt.It is the first large gold deposit discovered in Chizhou area with more than 22 t gold.Paodaoling gold deposit is independent with little other economic metal elements,and develop mainly in dacite-porphyrite.According to the detailed description of geological characteristics of gold deposit,combined with the metallogenic model of porphyry gold deposit and the characteristics of zircon U-Pb dating and geochemistry,it is proposed that Paodaoling gold deposit is a Cu-poor porphyry gold deposit formed in Early Cretaceous arc environment,and part of ore blocks experiences hydrothermal alteration.Ore bodies,which are controlled by NE-tectonic-magmatic belt with less than 1.0 km^2 outcrop area, are typical small intrusion forming large deposit.According to the principles of “similar analogy”,“spectrum of ore deposit”,“trend extrapolation”,“comprehensive information evaluation”,etc.,  | 
| ISSN: | 1672-6561 |