| 宋威方,刘建中,吴攀,谢卓君,王泽鹏,杨成富,邹院兵,熊扬福,陈松,刘兴平.黔西南雄武金矿床元素地球化学特征及其地质意义[J].矿产勘查,2023,14(9):1621-1629 |
| 黔西南雄武金矿床元素地球化学特征及其地质意义 |
| Geochemical characteristics of elements and geological significance of the Xiongwu gold deposit in Southwest Guizhou |
| 投稿时间：2020-11-14 修订日期：2023-02-20 |
| DOI：10.20008/j.kckc.202309008 |
| 中文关键词: 黔西南 雄武金矿床 元素地球化学 “四分组”效应 弱酸性流体 |
| 英文关键词: Southwest Guizhou Xiongwu gold deposit elemental geochemistry “four grouping” effect weak acid fluid |
| 基金项目:本文受湖北省自然科学基金联合基金项目（2023AFD230）、湖北省地质局科研项目“鄂东北地区战略性矿产成矿条件与找矿方向研究”（KJ2023-29）、国家自然科学基金联合基金项目（U1812402）和贵州省科技计划项目“贵州省卡林型金矿成矿与找矿科技创新人才团队建设”（黔科合人才平台-CXTD［2021］007）联合资助。 |
|
| 摘要点击次数: 845 |
| 全文下载次数: 544 |
| 中文摘要: |
| 黔西南雄武金矿床为赋存在构造蚀变体（SBT）中的一中型金矿床，为了探讨雄武金矿床水岩交换过程中的元素迁移规律、矿质来源和成矿流体特征，本次研究基于ICP-MS对雄武金矿典型剖面上的8个矿石和近矿围岩样品进行微量元素和稀土元素测试，结果显示，在水岩反应过程中微量元素主要以Au、As、Sb、Hg、Li、U等元素进入围岩，Co、Ni、Sr、Hf、Th被带出容矿岩石为特征。经球粒陨石标准化后的稀土元素曲线主要表现为轻稀土相对富集的右倾型，围岩与矿石ΣLREE为24.69×10-6~283.31×10-6，ΣHREE为3.94×10-6~25.15×10-6，LREE/HREE为3.90~8.21，曲线显示典型的“四分组”特征，指示轻稀土分馏相对较强的特点，且矿石经历了显著的热液蚀变反应；根据矿石的Ce负异常和Eu正异常值，指示成矿流体部分来源于深部弱酸性和还原性温度较高（＞250 ℃）的流体特征，成矿物质可能来源于深部。本次研究成果对于深入了解雄武金矿床成因具有重要意义。 |
| 英文摘要: |
| The Xiongwu gold deposit in Southwest Guizhou Province is a medium-sized gold deposit occurring in structural alteration variation （SBT）. In order to explore the element migration rule， mineral source and ore-forming fluid characteristics in the water-rock exchange process of Xiongwu gold deposit， this study conducted trace and rare earth elements test on 8 ore and surrounding rock samples from the typical section of Xiongwu gold deposit based on ICP-MS. In the process of water-rock reaction， the trace elements are mainly Au， As， Sb， Hg， Li， U and other elements enter the surrounding rock， and Co， Ni， Sr， Hf， Th are carried out of the ore-bearing rock. The curve of rare earth elements normalized by chondrites mainly shows a right-leaning type of relative enrichment of light rare earth elements. The ΣLREE of surrounding rock and ore ranges from 24.69×10-6 to 283.31×10-6， ΣHREE ranges from 3.94×10-6 to 25.15×10-6， and LREE/HREE ranges from 3.90 to 8.21. The curves show typical “four-group” characteristics， indicating that light rare earth fractionation is relatively strong， and the ore has undergone significant hydrothermal alteration reaction. According to the negative Ce anomaly and positive Eu anomaly of the ores， it indicates that the ore-forming fluid is partly derived from the fluid characteristics of deep weak acidity and high reducing temperature （>250 ℃）， and the ore-forming material may come from the deep. This study is of great significance to further understand the genesis of the Xiongwu gold deposit. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |