• captcha

中国科技核心期刊

美国化学文摘社(CAS)数据库

美国EBSCO学术数据库

日本科学技术振兴机构数据库(JST)

期刊导读

胶东玲珑金矿床热液蚀变作用过程的元素迁移规律

  • 作者:
  • 任飞1,2,3,蒋雷1,2*,李超4,5,耿凯强1,2,张娜1,2,李珊珊1,2,6,张琪彬1,2,丁正江1,2

  • 作者单位:
  • (1. 深部金矿探测大数据应用开发山东省工程研究中心;2. 山东省地质矿产勘查开发局第六地质大队; 3. 中国地质大学(北京)地球科学与资源学院;4. 国家地质实验测试中心; 5. 中国地质调查局铼-锇同位素地球化学重点实验室;6. 中国地质大学(北京)数理学院)
  • 基金项目:

  • 国家重点研发计划项目(2023YFC2906900);山东省深部金矿探测大数据应用开发工程实验室项目(SDK202214)
  • 详细信息:

  • 作者简介:
  • 任 飞(1996—),男,助理工程师,硕士,从事找矿勘查研究工作;E⁃mail:renfei0627@qq. com
  • 通讯作者:
  • 蒋 雷(1987—),男,高级工程师,硕士,从事地质矿产勘查研究工作;E⁃mail:lyjl612@126. com
  • PDF下载

Element migration during hydrothermal alteration in the Linglong Gold Deposit, Jiaodong Peninsula

  • English Author:
  • Ren Fei1,2,3, Jiang Lei1,2, Li Chao4,5, Geng Kaiqiang1,2, Zhang Na1,2, Li Shanshan1,2,6, Zhang Qibin1,2, Ding Zhengjiang1,2

  • Unit:
  • (1. Shandong Engineering Research Center of Application and Development of Big Data for Deep Gold Exploration; 2. No. 6 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources; 3. School of Earth Sciences and Resources, China University of Geosciences, Beijing; 4. National Research Center for Geoanalysis; 5. Key Laboratory of Re-Os Isotope Geochemistry, China Geological Survey; 6. School of Science, China University of Geosciences, Beijing)
  • 摘要
  • 在线预览
  • 参考文献

摘要:

玲珑金矿床是胶东代表性矿床,其热液蚀变作用与金成矿过程密切相关。通过微区X射线荧光光谱法(Micro⁃XRF)、主成分分析法(PCA)及全岩地球化学法,系统研究了玲珑金矿床热液蚀变过程元素迁移规律及其对金沉淀的控制机制。结果表明:①钾长石化阶段以Al、K、Si富集和Ca、Na亏损为特征,斜长石交代为钾长石并伴随绿泥石形成;②绢英岩化阶段以K迁入、Si和Ca迁出为主,长石分解形成绢云母和石英;③黄铁绢英岩化阶段是金富集的关键期,Fe、Cu等元素以硫化物形式沉淀,导致[Au(HS)2] -络合物失稳而释放金。主成分分析揭示了蚀变分带的空间演化规律,PC1(41.0 %)和PC2(22.5 %)分别表征钾长石化与硫化物成矿阶段。研究进一步提出,黄铁矿化与酸性流体环境的协同作用驱动了“流体-岩石反应—硫化物沉淀—金富集”的循环。Micro⁃XRF结合PCA有效解析了混合蚀变信息,为热液成矿系统的动态模拟提供了高精度技术支撑。研究可为胶东金矿床深部找矿预测及成矿机理研究提供重要依据。

关键词:

胶东;玲珑金矿床;元素迁移;质量平衡;Micro⁃XRF;主成分分析法;金沉淀机理

Abstract:

The Linglong Gold Deposit is the representative deposit in the Jiaodong Peninsula. Its hydrothermalalteration is closely related to gold mineralization. This study investigates element migration patterns during hydrothermalalteration and their controlling mechanisms on gold precipitation using micro⁃X⁃ray fluorescence spectroscopy(Micro⁃XRF), principal component analysis(PCA), and whole⁃rock geochemistry. The results show that: ①The K⁃feldsparalteration stage is characterized by enrichment in Al, K, and Si and depletion in Ca and Na, during which plagioclase isreplaced by K⁃feldspar accompanied by the formation of chlorite. ②The sericitization stage involves the influx of K andthe leaching of Si and Ca, where feldspar decomposes to form sericite and quartz. ③The pyrite⁃sericite alteration stagemarks the key phase of gold enrichment, during which Fe and Cu precipitate as sulfides, destabilizing[Au(HS)₂]⁻complexes and triggering gold release. Principal component analysis reveals the spatial zoning of alteration:PC1(41.0 %)represents the potassic alteration stage, and PC2(22.5 %)corresponds to the sulfide mineralizationstage. The study further proposes that the interaction between pyritization and acidic hydrothermal fluids drives a cyclicprocess of "fluid-rock interaction-sulfide precipitation-gold enrichment". The combination of Micro⁃XRF and PCAenables precise interpretation of overlapping alteration signals, offering high⁃resolution technical support for dynamicmodeling of hydrothermal mineralizing systems. These findings provide important insights for deep prospecting andmetallogenic mechanism research in the Jiaodong Gold Deposit.

Keywords:

Jiaodong Peninsula; Linglong Gold Deposit; element migration; mass balance; Micro⁃XRF; principalcomponent analysis; gold precipitation mechanism