滇西北与喜马拉雅期富碱斑岩有关的金矿成矿系统

滇西北地区广泛发育一套以喜马拉雅期为主，以富碱为特点的斑岩体(脉)，空间上具有以岩体(脉)集中区为单元，不同单元组成岩带，多岩带近平行产出的特征。富碱岩浆是地幔富碱质流体经由深大断裂上升至壳-幔混合带激发其岩石部分熔融的产物。金矿成矿与岩浆成岩一脉相承，形影相随，具有与富碱岩体完全一致的时空分布特点，体现了其成岩成矿受区域构造控制的一体化特征。成矿流体主要源于地幔，矿质则地幔与岩浆源区兼而有之。岩浆和岩浆活动是金矿成矿作用中深部矿质上升的载体和不断聚集的动力。由(近)EW向构造活动一地幔富碱质流体上升-壳-幔混合带内岩浆形成-富碱岩浆分异演化一流体成矿构成了统一的区域成矿系统，称之为该区与喜马拉雅期富碱岩浆活动有关的金矿(构造)-壳-幔(流体-岩浆)成矿系统。

Gold mineralization system related to alkali-rich porphyries in Himalayan,the northwestern part of Yunnan

The Cenozonic alkali-rich porphyries formed through fractional melting (and/or alkali-metasomatism) of the source rocks in the lower-crust and upper-mantle by the mantle-derived hydrocarbon alkali fluid which migrated up along deep faults (mainly EW-trending-nearlly) into the crust-mantle belt(mixed layer or transition zone).It is considered that the EW-trending,buried,deep faults, resulting from remobilization of ancient structures in the Cenozoic special geological and geography conditions,are one of results of regional stress adjustment.The fluid (it might Au-bearing) moved up through melting body or accompanied the intrusions of the alkali-rich magma and obtained gold from the rocks the fluid passed by metasomatism,extraction and remobilization and then changed into ore-bearing hydrothermal solution.When it moved into some favorable space around the porphyry bodies (veins) in the shallow of crust,a series of gold (and other metal) deposits with different types and sizes formed.A metallogenic system, named (tectonic-) crust-mantle (fluid-magma) metallogenic system of gold deposit related to Cenozonic alkali-rich porphyries in the north-western region of Yunnan province,is establised in this paper.