贵州德江地区萤石-重晶石矿体地质特征及找矿方向

谢选雄; 李光春; 袁睿

谢选雄,李光春,袁睿.贵州德江地区萤石-重晶石矿体地质特征及找矿方向[J].贵州地质,2026,43(1):24-32, 63

贵州德江地区萤石-重晶石矿体地质特征及找矿方向

Geological Characteristics and Ore Prospecting Direction of Fluorite-Barite Ore Bodies in Dejiang Area，Guizhou Province

投稿时间：2026-01-14

DOI：

中文关键词: 萤石-重晶石地质特征找矿方向德江贵州

英文关键词:Fluorite(Barite) Geological features Mining direction Dejiang GuiZhou

基金项目:贵州省新一轮找矿突破战略行动项目(黔自然资函〔2024〕42号)之贵州省德江县金山萤石矿普查项目资助

作者	单位
谢选雄	贵州省有色金属和核工业地质勘查局地质矿产勘查院,贵州贵阳550005
李光春	贵州省有色金属和核工业地质勘查局地质矿产勘查院,贵州贵阳550005
袁睿	贵州省有色金属和核工业地质勘查局地质矿产勘查院,贵州贵阳550005

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中文摘要:

贵州德江地区位于上扬子陆块南部被动边缘褶冲带凤冈滑脱褶皱带，即凤冈南北向隔槽式褶皱变形区中北部，该区是我国重要的萤石-重晶石成矿区带之一。本文拟基于野外地质调查，对区域内典型萤石-重晶石矿床进行对比分析，从而总结控矿地质因素，剖析矿床成因机制，建立成矿模式，为圈定成矿有利靶区提供理论支撑及方向。结果显示:区域内萤石-重晶石矿体主要赋存于红花园组和桐梓组二段碳酸盐岩地层中，其矿体主要产出于区域性断裂两翼与NE或NNE向断裂近于垂直相交NNW或NW向断裂或裂隙中。区域内萤石-重晶石成矿机制大致为，燕山期深部富含Ba、F、S的热卤水在深部压力作用下，沿着早期形成的构造裂隙带不断上移，同时在上移过程中不断萃取已有地层中的其他成矿物质，随着卤水不断上移在一定层位与下渗的建造水和大气水汇聚形成含矿流体，由于上覆泥页岩的遮挡而停止向上运移，随着温度、压力的变化，在一定层位、构造有利空间内交代、沉淀形成了脉状、透镜状、不规则囊状及团块状萤石-重晶石矿体，从而认为区域内萤石-重晶石矿体对构造具有选择性。未来找矿工作应聚焦于断裂构造精细解析、地球化学异常验证及深部探矿工程部署，以期实现该区域萤石-重晶石矿产资源的突破。

英文摘要:

The Dejiang area in Guizhou Province is located in the passive margin fold-thrust belt of the Upper Yangtze Block，specifically within the Fenggang Detachment Fold Belt，which is the northern part of the north-south oriented trough-type fold deformation zone in FenggangThis area is one of the important fluorite-barite mineralization belts in ChinaThis paper intends to conduct a comparative analysis of typical fluorite-barite deposits in the region based on field geological surveysThrough this，it aims to summarize the controlling geological factors，analyze the genesis mechanism of the deposits，establish the mineralization model，and provide theoretical support and direction for identifying favorable target areas for mineralizationThe results show:The fluorite-barite ore bodies in this area are mainly distributed in the carbonate rock strata of the Honghuajuan Formation and Tongzi FormationThe ore bodies mainly occur in the two wings of regional faults and near-vertical intersections of NE or NNE trending faults with NNW or NW trending faults or fissuresThe mineralization mechanism of fluorite-barite in this area is roughly as follows:During the Yanshanian period，the deep hot brine rich in Ba，F，and S，under the action of deep pressure，continuously moves upward along the early-formed structural fracture zoneAt the same time，during the upward movement，it continuously extracts other mineral-forming substances from the existing strataAs the brine continuously moves upward，at a certain layer position，it converges with the infiltrating formation water and atmospheric water to form mineral-bearing fluidsDue to the obstruction of the overlying mudstone，it stops upward movementAs the temperature and pressure changed，in certain layers and in favorable structural spaces，metasomatism and precipitation occurred，forming vein-like，lens-like，irregular sac-like and lumpy fluorite-gypsum ore bodiesThus，it is believed that the fluorite-barite ore bodies within the region have selectivity with respect to the structureIn the future，mineral exploration efforts should focus on detailed analysis of fault structures，verification of geochemical anomalies，and deployment of deep exploration projects，with the aim of achieving a breakthrough in the fluorite-barite mineral resources in this area

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