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May 9, 2026Bulletin of Mineralogy Petrology and Geochemistry0 citations

3D geochemical characteristics and prospecting significance of the Structural Alteration Body in the Lannigou Carlin-type gold deposit, Southwest Guizhou, China

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QTQinPing TanYHYue HuangZXZhuojun Xie

Key Points

  • The study aims to explore the geochemical and structural characteristics of the Lannigou Carlin-type gold deposit, focusing on the mineralization potential of the Structural Alteration Body (SBT).
  • Conducted core logging and 3D modeling to identify hydrothermal alteration zones.
  • Performed geochemical analysis on mineralization indicators such as Au, As, Hg, and Sb.
  • Mapped the distribution of ore-related elements within the SBT.
  • SBT exhibits high enrichment coefficients for Au (138), As (143), Hg (38.6), and Sb (17.0).
  • Geochemical modeling shows a significant layer sequence from Cd to Hg, indicating stratified mineralization.
  • The study proposes that SBT connects deep faults and shallow inclined structures, crucial for gold mineralization in the region.

Abstract

烂泥沟金矿是南盘江-右江成矿区最大的断控型金矿,其深部是否存在层控型矿化是实现该区找矿突破的关键。本研究通过岩心编录与三维建模,首次在该矿床三叠系和二叠系附近碎屑岩系统与碳酸盐岩系统(硅-钙界面)之间,确证了一套强烈热液蚀变的顺层滑脱破碎带,即构造蚀变体(SBT)。地球化学分析显示,该SBT具有显著矿化特征,Au、As、Hg和Sb富集系数分别为138、143、38.6和17.0。三维地球化学模型揭示,成矿相关元素异常在SBT内呈大面积面状分布且具有显著分带规律,其分带序列(由深至浅)为:Cd → Mo → Sb → Tl → W → As → Au → Ag → Hg。该序列反映了成矿流体进入SBT初期由于物化条件剧烈变动导致Cd、Mo、Sb、Tl的较早沉淀,体现了Hg、Ag在前缘的远距离迁移特性。研究认为,SBT是连接深部深大断裂与浅部陡倾赋矿构造的关键纽带,是南盘江-右江成矿区金成矿的核心控制因素之一。研究成果丰富了多层次滑脱构造成矿体系内涵,为该区实现深部“二度空间”找矿突破提供了科学依据。

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Cite This Study

Tan et al. (2026) studied this question.

synapsesocial.com/papers/69fecfe9b9154b0b82876eb8https://doi.org/10.3724/j.issn.1007-2802.20260105
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