胶北元古界变质岩的同位素测年新成果及其地质意义

NEW DATA ON ISOTOPE AGE OF THE PROTEROZOIC METAMORPHIC ROCKS FROM NORTHERN JIAODONG AND ITS GEOLOGICAL SIGNIFICANCE

摘要:

本文报导了在胶北地区元古界变质岩中所取得的同位素测年的最新成果。根据这一成果,作者认为:荆山群与粉子山群应为同时异相的产物;芝罘组应从粉子山群中剔出,并升格为群级地层单位。与此同时,还对蓬莱群的时代问题进行了讨论。

Abstract:

The latest isotope age data from the Proterozoic metamorphic rocks in northern Jiaodong are reported which has led the author to conclude that:the Jingshan Group and the Fenzishan Graup should be considered to be synchronous but heteropical-facies products; the Zhifu Formation should be seperated from the Fenzishan Group and promoted to a separate group. Meanwhne, the age of the Penglai Group is also discussed.