大理岩矿床地质特征及分类探讨
摘要
期叠加矿床及追溯原岩与早期成矿环境。本文梳理其地质特征与现有分类,整合碳氧稳定同位素及变质重结晶等多
因子数据,构建“地质特征-同位素参数-变质重结晶机制”定性-定量一体化分类模型。研究显示,大理岩碳氧
同位素可示踪流体来源与原岩环境,δ13C多继承原岩特征,δ18O易受后期作用呈负偏移。不同成因矿床的同位素
轨迹、重结晶类型及构造-流体特征差异显著。结合实例验证,将原厘定为中低温热液充填型的鄂西东岳大理岩矿
床,修正划分为热液充填型。该模型提升了分类客观性与可重复性,为复杂大理岩矿床成因解析及同类矿勘探提供
新范式。
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