四川攀枝花地区的上震旦统把关河组

四川攀枝花地区的上震旦统把关河组为滨海、浅海相碎屑岩建造 ,以灰白色、灰色中厚层细至中粗粒含海绿石长石石英砂岩、石英砂岩、长石石英砂岩为主夹灰色薄层至极薄层粉砂岩、页岩 ,在盐源 -丽江台缘坳陷区与下伏冰水湖泊相杂色列古六组为整合或平行不整合接触 ,而在康滇地轴上与前震旦纪基底变质岩呈角度不整合接触。在全区均与上覆观音崖组为整合接触。新建的把关河组在民政、务本及其以西地区相当于《四川省岩石地层》(1997)中的下震旦统澄江组 ,在米易县则相当于下元古界五马箐 (岩 )组的上部 ,而在盐边红格 ,则相当于 1∶ 2 0× 10 4 永仁幅中的会理群力马河组下部。主要论述新建把关河组的理由和依据

THE BAGUANHE FORMATION OF UPPER SINIAN IN THE PANZHIHUA AREA, SICHUAN

The Baguanhe Formation of Upper Sinian was characterized by clastic formation of littoral and neritic facies,and composed of feldsparthic quartzarenit,quartzarenite,siltstone and shale.Throughout the region,the Guanyinya Formation of Sinian was overlaid conformably on the Baguanhe Formation.In the Yanyuan Lijiang area.Baguanhe formation was overlaid conformably on the Lieguliu Formation and overlaid disconformably on the metamorphic rocks of Pre Sinian basement in the Kangdian Axis.Baguanhe Formation is correlated with the Chengjiang Formation of Lower Sinian,with the upper part of Wumajing Formation and with the lower part of Limahe Formation.In the paper,the reason and evidence for establishing the Baguanhe Formation was discussed.