长江中下游斑岩-矽卡岩铜多金属矿床共伴生碲、硒资源现状和成矿规律浅析
Bulletin of Mineralogy, Petrology and Geochemistry（2024）
Abstract
斑岩-矽卡岩铜多金属矿床常伴生大量的碲、硒资源,提供了全球目前几乎所有的碲、硒产量,但碲、硒在这些矿床中的成矿规律还不清楚.长江中下游成矿带多处铜多金属矿床都伴生有硒和/或碲资源,但其资源现状、赋存状态和成矿规律的研究还较为薄弱.本文基于已有的研究资料,对长江中下游伴生碲、硒资源量进行了估算,对碲、硒的赋存状态和分布规律以及成矿规律进行了探讨.目前长江中下游已探明的伴生碲、硒资源量分别为9061 t和10 574 t,相当于18个大型碲矿床、21个大型硒矿床,这些矿产资源已部分回收利用.其中九瑞矿集区的资源量最大.碲、硒主要以独立矿物形式存在,发育4种产状碲的独立矿物和2种产状硒的独立矿物,它们均形成于硫化物阶段,后者主要形成于晚硫化物阶段.根据资源量相对规模,该成矿带上的矿床类型可分为硒矿床、碲硒和硒碲矿床三种.以岩体为中心向外,碲、硒含量由低到高依次为斑岩型矿体、矽卡岩型矿体和层间交代型矿体.本文初步揭示了长江中下游成矿带碲、硒矿化的成矿规律,可为资源评价和找矿勘查提供科学依据.今后应加强对斑岩-矽卡岩铜金成矿系统中碲、硒富集机制的研究.
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Key words
Te and Se mineralization,resource,occurrence state,mineralization regularity,the Middle-Lower Yangtze River Valley metallogenic belt
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