【摘要】 在分析流体包裹体特征的基础上,提出锡铁山铅锌矿床两种矿石类型成矿流体的特点:条带状矿石具有中低温度(182℃~229℃),低盐度或较低盐度(5.3%~21.9%),密度小于1×103kg/m3,弱酸、弱还原环境;块状矿石具有中高温(224.5℃~341℃),较高盐度(22.8%~34.7%),密度大于1×103kg/m3,中性、弱还原环境。两种不同类型的矿石也说明了该矿床具有两个不同成矿期次的热液:火山喷流沉积成矿热液在裂谷凹陷盆地富集形成条带状矿石;火山作用期后热液叠加改造前者形成块状矿石。两个不同成矿期次的热液造成锡铁山矿床的矿体和矿石的多样性。更多还原

【Abstract】 On the base of fluid inclusion analyses,two ore forming fluids are deduced from ores of Xitieshan Pb-Zn deposit.Banded ores are formed in middle-low temperature(182℃～229℃),low salinity(5.3%～21.9%),density <1×10~3kg/m~3,weak acid,and weak reduction environment condition.Massive ores are formed in middle-higher temperature(224.5℃～341℃),higher salinity(22.8%～34.7%),density >1×10~3kg/m~3,neutral,and weak reduction environmental conditional.Two type ores show that there are two different ore-forming fluids.Banded ores are formed in rift depression basin by volcanic spout hydrothermal fluids.Massive ores are formed by post-volcanic hydrothermal fluids superimposed on banded ores.Two stage ore-forming fluids cause variousness of ores and orebodies in the Xetieshan lead-zinc deposit.更多还原