贵州紫云方解石矿地质特征及成因探讨

来源 :贵州省人民政府学位委员会 | 被引量 : 0次 | 上传用户:wingerwesker
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黔西南地区方解石矿床分布较广,资源丰富.本文对紫云县内方解石矿床地质、岩石学和元素地球化学特征进行了研究,结果显示,区内方解石矿床发育有14个矿段,每个矿段分布数个规模不等的矿体,矿体数量合计36个.褶皱、断裂构造及地层对矿床具有明显的控制作用,矿体以似层状、脉状及透镜状充填于断裂构造带内及地层中.矿物组成以方解石为主,含少量的萤石.区内方解石成矿与黔西南大规模低温热流体运移有着密切关系,热液流体因温度骤降引起Mg沉淀,是形成低Mg方解石的主要原因.根据方解石矿床成矿地质特征分析,认为紫云地区方解石矿属于低温热液充填型矿床.紫云、罗甸、册亨、望谟、贞丰区域方解石成矿地质条件优越,通过地质调查,是形成小型-中大型方解石(冰洲石)有利成矿区。建议加大地质调查工作力度,有望取得方解石找矿新突破。
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