投稿时间：2024-12-02
修订日期：2025-03-11
网络发布日期：2025-04-25
中文摘要:水银洞矿床位于滇黔桂“金三角”的北部，是该地区层控卡林型金矿重要代表矿床之一。文章对水银洞金矿床茅口组灰岩中方解石进行原位微区LA-ICP-MS分析测试，数据显示稀土含量总体较低（∑REE=（3.41~18.01）×10-6），标准化模式曲线具有轻稀土元素富集、重稀土元素亏损的右倾模式（LREE/HREE=0.46~10.32，平均值1.93，LaN/YbN=3.31~1666.65，平均值147.37），具有弱Ce负异常（δCe=0.34~1.03，平均值0.60）和弱正Eu异常（δEu=0.62~4.41，平均值1.13）。通过与前人发表的方解石稀土元素对比分析后，认为水银洞热液流体是脉动式侵位，构建了水银洞热液流体脉动侵位模式图。最后，推测茅口组灰岩中的方解石可能代表了下一个热液循环的开始，深部还应有较大的成矿潜力。
Abstract:The Shuiyindong gold deposit is located in the north of the “Golden Triangle” of Yunnan, Guizhou and Guangxi, and is one of the important representative deposit of layered Carlin-type gold deposits in this area. This article presents an in-situ micro-area LA-ICP-MS analysis of calcite within the Maokou Formation limestone of the Shuiyindong gold deposit. The data reveals a generally low concentration of the total rare earth elements (∑REE=(3.41~18.01)×10-6), with the normalized pattern curve exhibiting a right-leaning trend characterized by an enrichment of light rare earth elements (LREE) and a depletion of heavy rare earth elements (LREE/HREE=0.46 to 10.32, with an average of 1.93; LaN/YbN=3.31 to 1666.65, with an average of 147.37). Additionally, there is a weak negative anomaly of cerium (δCe=0.34 to 1.03, with an average of 0.60) and a mild positive anomaly of europium (δEu=0.62 to 4.41, with an average of 1.13). Through comparative analysis with previously published data on calcite’s rare earth elements, it is inferred that the hydrothermal fluid in the Shuiyindong deposit is characterized by a pulsating intrusion model, which has been illustrated in a schematic representation. Ultimately, it is posited that the calcite within the Maokou Formation limestone may signify the onset of the next hydrothermal cycle, suggesting substantial mineralization potential at greater depths.
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基金项目:本文得到紫金集团矿山综合找矿预测专项-重要矿床类型成矿规律与找矿预测研究项目（编号：KCDZKCY-2022-048）资助
引用文本：
李德东,王玉往,张会琼,解洪晶,陈昱,龙灵利,耿健,王琦睿.2025.贵州省水银洞金矿床茅口组方解石地球化学特征及指示意义[J].矿床地质,44(2):349~364LI DeDong,WANG YuWang,ZHANG HuiQiong,XIE HongJing,CHEN Yu,LONG LingLi,GENG Jian,WANG QiRui.2025.Geochemical characteristics and indicated significance of Maokou Formation calcite in Shuiyindong gold deposit, Guizhou Province[J].Mineral Deposits44(2):349~364
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