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    陕西秦岭地区萤石矿成矿规律与找矿方向研究

    Study on the metallogenic regularity and prospecting direction of fluorite deposits in Qinling Region,Shaanxi Province

    • 摘要: 萤石作为战略性矿产资源,对于陕西省则面临资源供给不足与勘查滞后的困境。本文以陕西秦岭地区的萤石矿床为研究对象,系统分析了其成矿地质背景、矿床类型、成矿规律及成矿作用。研究表明,陕西省萤石矿床主要分布于北秦岭、南秦岭造山带及北大巴山褶皱带,分为单一型(玉石坡式)和共伴生型(大磨沟式),分别受控于花岗岩体内断裂构造与火山岩接触带构造。玉石坡式矿床赋存于印支期-燕山期花岗岩内断裂中,矿石品位高,成矿物质主要来源于花岗岩;大磨沟式矿床与硫化矿共生,矿石品位较低,成矿物质主要来源于火山岩。研究提出南秦岭北部和北秦岭大花岗岩体内断裂带、北大巴山松杉河断裂两侧仍具有找矿潜力,建议采用多方法联合勘查技术,探测深部资源潜力,为区域萤石资源高效开发提供科学依据。

       

      Abstract: Although fluorite is a strategic mineral resource,Shaanxi Province faces challenges such as insufficient supply and lagging exploration.Focusing on fluorite deposits in the Qinling region of Shaanxi,this study systematically analyzes their metallogenic geological setting,deposit types,metallogenic regularities,and ore-forming processes.Results indicate that fluorite deposits in Shaanxi are primarily distributed within the North Qinling,South Qinling orogenic belt and the Northern Daba Shan fold belt,and can be classified into two main types:simple-type(Yushipo-type) and associated-type(Damogoutype).The Yushipo-type deposits occur in fractures within Indosinian-Yanshanian granites,characterized by high ore grades,with metallogenic materials mainly derived from the granite.The Damogou-type deposits coexist with sulfide ores,featuring lower ore grades,and their metallogenic materials are primarily sourced from volcanic rocks.This study suggests that fracture zones within large granite bodies in the northern part of the South Qinling and the North Qinling,as well as areas along both sides of the Songshanhe Fault in the North Dabashan,still hold prospecting potential.It recommends integrated multimethod exploration techniques to identify deep-seated resource potential,thereby providing a scientific basis for the efficient development of regional fluorite resources.

       

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