Abstract: Based on the chemical composition and REE data of MORB-type amphibolites from South Liaohe Group in east part of Dandong-Kuandian District, it is proved that there have been a paleoocean basin between Langlin and Longgang Archaeozoic massifs. The discovery of ocean-born gabbroes, diabases and pyroxenites is definite clues to look for more remained pieces of paleoophiolites in this region.

Key words: paleoophiolites, South Liaohe Group, Dandong-Kuandian

摘要： 通过对丹东-宽甸东部地区南辽河群中部分岩类的分析，以MORB型斜长角闪岩进一步证实了太古宙龙岗地块与狼林地块间古洋盆的存在；以大洋环境生成的层状硅质岩、辉长岩、辉绿岩、及堆晶辉石岩的发现，为在该地区继续寻找洋盆收敛、陆陆碰撞的证据——古蛇绿岩残片提供了明确的线索。

关键词: 古蛇绿岩, 南辽河群, 丹东-宽甸