康滇地轴中段基础地质新知

SOME NEW INFORMATION ON FUNDAMENTAL GEOLOGY IN MIDDLE SECTOR OF THE KANGDIAN AXIS

据野外研究和同位素年龄测定资料，阐明红石井盆地中基性火山岩属海西期，其下部的磨拉石建造应是澄江组。黄土坡酸碱性花岗岩株属燕山期。河口群中存在基·性火山岩、条带状磁铁石英岩、碳硅质板岩（硅质石墨片岩）三组合建造，应属晚太古代未－早元古代地层。

Field observation and isotopic dating indicate that intermediate and basic volcanic rocks in Hongshijing basin are product in Hercynian Epoch and that the underlying mollasse formation should be put under the Chengjiang Formation.Huangtupo alkali granite was implaced in Yanshn Epoch.Basic volcanic rock-banded magnetite puartzite-carboncaceous-siliceous slate(siliceous graphiuc schist)formation which should be put under Upper Archaeozoic to Lower Proterozoic Erathem is in existence in the Hekou Group.