海城小孤山区辽河群大石桥组地层中硅质岩与成矿探讨  

THE SILICALITE IN DASHIQIAO FORMATION,LIAOHE GROUP IN XIAOGUSHAN AREA, LIAONING:Origin and its relation to mineralization

作　　者：尤洪喜 赵东芳[2] 

机构地区：[1]辽宁有色沈阳地质勘查院,辽宁沈阳110121 [2]沈阳地质矿产研究所,辽宁沈阳110033

出　　处：《地质与资源》2004年第3期152-155,共4页Geology and Resources

摘　　要：在海城市小孤山区辽河群大石桥组一段、三段地层中,都发现了硅质岩的分布.小孤山区硅质岩具有微—细粒变晶结构特点,与铅、锌、银、金矿化密切伴生.通过与青城子硅质岩岩石化学成分及组构特征的对比分析,认为小孤山区硅质岩属于海底火山喷溢-热水沉积成因,与成矿关系极为密切,从而展示了小孤山及外围地区辽河群地层找矿的前景.Silicalite is found in the strata of the first and third members of Dashiqiao formation,Liaohe group in Xiaogushan area, Liaoning Provinece, where a series of nonferrous and precious metallic mineral resources are distributed. The silicalite, characterized by micro fine granular blastic texture, is closely associated with lead, zinc, silver and gold mineralization. By the comparative analysis of lithochemistry and fabric characteristics to those of the silicalite in Qingchengzi, it is suggested that the silicalite in Xiaogushan area is of marine volcanic effusion hot water sediment origin. The rock is closely related to the metallogenesis. Thus the exploration in Liaohe group in Xiaogushan and surrounding areas is with great potential.

关 键 词：硅质岩 成矿关系 地层 热水沉积 伴生 金矿化 岩石化学成分 山区 辽河 分布 

分 类 号：P618[天文地球—矿床学] P588[天文地球—地质学]