和田宝塔山铅锌矿地质特征与流体包裹体研究

摘要

The ore-bearing strata of Baotashan lead-zinc mine in Xinjiang autonomous region are belong to Tielongtan Formation of Upper Cretaceous.The host rocks are mainly limonitization and fractured limestone,fractured and altered volcanic rocks are also outcropped.Wall rock alteration is intensively,mainly carbonatization and propylitization.The lead-zinc deposition in study area is attributed to strata-bound type mine related to tectonic hydrothermal fluid.Composi-tion in fluid inclusion shows high Fe2O3, low K2O,and Na2O>K2O.The study on the inclusion also demonstrates that ore-forming fluid is in medium-high temperature and in low-medium density.The evolution characters of the ore-forming flu-id seem deduced gradually in temperature and salinity.%　　新疆宝塔山铅锌矿含矿地层为上白垩统铁隆滩组，赋矿岩石主要为褐铁矿化灰岩、碎裂化灰岩及灰岩碎裂岩，次为碎裂化强蚀变火山岩，围岩蚀变强烈，主要有碳酸盐化、青磐岩化等。属与构造热液有关的层控型碳酸盐岩型铅锌矿床，矿石具高Fe2O3、低K2O及Na2O>K2O总体特征。流体包裹体化学成分研究表明，成矿流体为中高温、中低密度热液，并存在温度逐渐降低或升高、从高盐度变化为低盐度演化特点。