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吉林省东部地处中朝准地台北部边缘地带,区内古老变质岩地层广泛分布。自下而上分为太古宇的鞍山群和元古宇的集安群、老岭群。该区同位素地质年代学研究程度较低。过去仅有一些零散的钾氩法表面年龄值,显然难以据此正确区分这些地层的沉积时限和变质作用期次。从1981年开始,我们在吉林省地质局和吉林省冶金局各有关地质队、所的大力协助下,采用多种测年手段综合对比的方法,在本区开展了比较系统的地
The eastern part of Jilin Province is located on the northern fringe of the Sino-North Korea Platform, where the ancient metamorphic strata are widely distributed. Bottom up into the archaic group of Anshan and Yuan Gu Yu Ji’an, Laoling group. The study of isotope geochronology in this area is relatively low. In the past, only a few scattered potassium-argon surface age values clearly found it difficult to correctly distinguish the sedimentary timing and metamorphism of these strata. Since 1981, with the help of the geologic teams of Jilin Provincial Bureau of Geology and Jilin Provincial Metallurgical Bureau, with the help of various methods of comprehensive dating, we conducted a systematic study in this area