吉南光华岩群地层特征及区域对比

通化光华一带出露有一套变质玄武岩-含榴黑云变粒岩-石榴二云片岩的岩石组合,被称之为光华岩群,经笔者重新厘定,自下而上可划分为双庙岩组、同心岩组,前者为一套变质气孔状玄武岩（斜长角闪岩）,后者为黑云变粒岩及石榴二云片岩、砂岩,为一套杂砂岩及泥岩建造,其形成时代为古元古代早期,与集安岩群时代相当,分别属古元古代早期裂谷盆地的边缘相和盆地边缘相沉积.

The stratigraphic characteristics and regional correlation of the Guanghua rock cluster in the southern part of Jilin Province

There is a set of metamorphic basalt-garnetiferous biotite leptynite-garnet twomica schist in the Guanghua,Tonghua area,which is named as Guanghua Group,it was redetemined by the authors,it can be divided into Shuangmiao Formation and Tongxin Formation from the lower to the upper,the former is a set of metamorphic vesiculate basalt(amphibolite),and the latter is a set of gray wacke and mudstone formation with garnetiferous biotite laptynite,garnet two-mica schist and sandstone,which is formed in the early Paleoproterozoic which correspond roughly to Ji`an Group time,and that belongs to marginal deposit of the early Paleoproterozoic rift basin and basin marginal deposit respectively.