滇西老厂银铅锌多金属矿床热液蚀变特征

通过对滇西澜沧老厂矿区1480 m中段2号硐室主巷和CM9穿脉典型蚀变剖面野外编录和室内岩矿鉴定,矿区深部与隐伏花岗斑岩岩浆作用有关的热液蚀变可划分为黄铁绢英岩化带、黄铜矿化硅灰石-透辉石-石榴子石矽卡岩化带、黄铁矿化透辉石矽卡岩化带、含钙铝榴石黄铁矿绢云母绿泥石青磐岩化带和大理岩化带.其中,硅灰石-透辉石-石榴子石矽...

Characteristics of hydrothermal alteration of the Laochang Laochang Ag-Pb-Zn polymetallic deposit in western Yunnan

Based on the field record and indoor rock and mineral identification of the typical alteration profile in main tunnel of No 2 adit and CM9 cross-vein in the 1480m section of the Laochang mining area in West Yunnan,the authors find that the hydrothermal alteration relating to magmatism of hidden granite porphyry in the deep part is divided into four zones,i e pyrite sericidization,chalcopyrite wollastonite-diopside garnet skarnization,pyrite mineralization diopside skarn and calcite-bearing garnet pyrite sericite chlushite and marlinization Among which,the chalcopyrite wollastonite-diopside garnet skarn zone is the most important ore-bearing geological body of deep skarn copper (molybdenum) deposits,the vein-like lead-zinc ore bodies are mainly occur in the fractures of the marbles beside the caldronite pyrite sericite chlorite propylite Outside the center of the rock mass,the color of skarn changes from reddish brown to grayish green The study conducted by the authors will provide prospecting ideas and directions for the prediction of deep hidden granite porphyry rocks (veins) and prospecting of porphyry-related deposits