韩小梦,郭云成,段留安,王建田,赵鹏飞,王利鹏,喻光明

• 1:中国地质调查局烟台海岸带地质调查中心
• 2:自然资源部深部金矿勘查开采技术创新中心/山东省深部金矿探测大数据应用开发工程实验室
• 3:中国地质调查局自然资源综合调查指挥中心

摘要(Abstract)：

前垂柳金矿为胶东胶莱盆地东北缘新发现的蚀变岩型金矿床，金矿体主要赋存于牧牛山岩体(二长花岗岩)、荆山群地层和鹊山岩体(糜棱岩化二长花岗岩)之间厚大的构造蚀变带内，截止目前推测资源量达到中型规模，但矿床的成矿物质来源尚不明确。基于前人研究及野外调查，选择典型矿体中含金黄铁矿作为研究对象，开展了S、Pb同位素分析，探讨了矿床的成矿物质来源。测试结果显示：矿石硫化物δ~(34)S值总体为10.13‰～12.39‰,极差为2.26‰,平均值10.98‰,均一程度高，具高δ~(34)S值特征，反映了深部成矿流体上侵过程中混染了更多的地层中的硫，显示了荆山群地层对成矿有一定贡献；矿石铅同位素~(206)Pb/~(204)Pb比值为17.149～18.886,~(207)Pb/~(204)Pb比值为15.482～15.677,~(208)Pb/~(204)Pb比值为37.860～40.073,显示前垂柳金矿铅为壳幔混合来源，且具有下地壳铅的特征。该矿床S、Pb同位素特征显示成矿物质来源为壳幔混源，与周边辽上、蓬家夼等典型矿床成矿物质来源一致，反映了该区燕山期大规模成矿事件，预示了胶莱盆地东北缘具有较大的找矿潜力。

关键词(KeyWords)： 胶莱盆地东北缘;前垂柳金矿;S同位素;Pb同位素;物质来源

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划（2022YFC2903605）;; 中国地质调查局金矿重点勘查区资源潜力评价工程项目“山东牟平辽上金矿资源潜力评价”（DD20230392）;; 重点勘查区战略性矿产资源勘查工程“胶西北地区金矿资源勘查”项目（ZD20220315）

作者(Author): 韩小梦,郭云成,段留安,王建田,赵鹏飞,王利鹏,喻光明

DOI: 10.19509/j.cnki.dzkq.tb20220659

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