右江盆地微细浸染型金矿的成因探讨  

GENESIS OF FINE-GRAINED DISSEMINATED GOLD DEPOSITS IN YOUJIANG BASIN

作　　者：庞保成[1] 林畅松[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《地质与勘探》2001年第4期9-13,共5页Geology and Exploration

基　　金：国家攀登计划预选项目 (95 -预 -3 9)资助

摘　　要：右江盆地微细浸染型金矿主要赋矿层位为中三叠统浊积岩 ,容矿岩石主要为泥质粉砂岩和粉砂质泥岩。矿体明显受断裂控制。硅化和黄铁矿化围岩蚀变明显、强烈。矿床形成温度 180℃～2 5 0℃。成矿时代为燕山晚期。成矿流体来源主要为大气降水。矿源层为中三叠统浊积岩。矿床的形成经历了同沉积期的预富集和燕山期的大气降水渗滤、萃取、富集成矿两个阶段。The Microgranular gold deposit in Youjiang basin is hosted in turbidite of Middle Triassic. Host rocks are pelitic siltstone and silty mudstone. Orebodies are obviously controlled by fractures. The alteration is characterized by intense silicification and pyritization. The temperature ranges mainly from 180oC to 250oC. Metallogenetic epoch was late Yanshanian and fluid derived from meteoric water. Source beds are turbidite of middle Triassic series. Its metallization includes sedimentary pre-enrichment and infiltration, extraction, transportation and mineralization of meteoric water in Yanshannian.

关 键 词：右江盆地 微细浸染型金矿床 成因 大气降水 成矿时代 成矿流体 成矿作用 

分 类 号：P618.51[天文地球—矿床学]