摘要
四平银（金）矿床石英包裹体 Rb－Sr等时线年龄 187± 4 Ma，表明首期成矿作用发生在燕山早期，矿床 Rb－Sr等时线年龄与蚀变绢云母 K－Ar年龄差异及不同矿段矿化特征差异表明，蚀变绢云母 K－Ar年龄反映后期热液成矿事件时代，四平银（金）矿床至少经历了两期热液成矿事件，首期成矿事件发生在燕山早期，晚期成矿事件发生在燕山中期，成矿热液活动时间跨度约 33 Ma。
Rb－Sr isochron age of quartz from the Siping ore－bodies is 187± 4 Ma,reflecting that the first stage mineralization occurred in the early Yanshanian period.The difference between the Rb－Sr isochron age and the K－Ar age (145～ 154 Ma) of sericite from alteration rock,together with mineralization features,indicates that the Siping Ag(Au) deposit was formed by two stage mineralizing events,the first stage is 187 Ma,the second stage is 145～ 154 Ma.The time scale of thermal fluids activities is about 33 Ma.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2001年第2期194-198,共5页
Geotectonica et Metallogenia
基金
国家自然科学基金( 48972035)
国家"九五"攀登计划预选项目( 95-y-25)
