【摘要】 云南省中部富碱斑岩形成于喜马拉雅山运动第一幕与第二幕之间的构造松弛阶段，由地壳深部的基性－超基性源岩经分离熔融而成。富碱斑岩成岩成矿作用受多级构造的控制：大地构造位置控制岩体呈带状分布；构造单元控制斑岩分区及特征；壳内大断裂及构造交汇部位控制斑岩的产出；次级断裂控制斑岩的形态、产状和矿化定位。地质地球化学资料表明，成矿物质主要来源于岩浆，受岩浆的化学成分和成矿元素丰度的影响。不同岩区富碱斑岩特征和成矿作用的差异归根结底是构造单元之间富碱斑岩源岩成分、深度和重熔程度微小差异的结果。更多还原

【Abstract】 The alkali rich porphyries in central Yunnan were formed by separated melting of the basic or ultrabasic source rocks in the deep crust during the structural relaxed stage between the first and second epoches of the Himalayan movement. Diagenesis and metallogenesis of the alkali rich porphyries were controlled by multi scale structures: The intrusions distributed in the belt were controlled by tectonic settings, its division and features by tectonic units, its occurrence by large scale intracrustal fractures and their crossing, and the shape, attitude and metallization by subsidiary fractures. Geological and geochemical data indicate that the ore forming materials were principally originated from magmatism and influenced by its chemical composition and abundances of elements. The differences of diagenesis and metallogenesis of the porphyries in different regions are attributed to a little diversity of the composition, depth and melting fraction of the source rocks among tectonic units.更多还原