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延边-东宁成矿带位于松辽平原东缘穆棱-宁安-敦化市一线以东至中朝、中俄边界。行政区划分别属于吉林东北部和黑龙江东南部,面积约10万km2。1成矿带地质背景本区寒武纪中晚期-奥陶、志留系处于隆起剥蚀环境,未接受相应的沉积作用。在本区南部,奥陶-志留纪末期由于古亚洲洋板块的俯冲作用,
Yanbian - Dongning metallogenic belt is located in the eastern edge of Songliao Plain Muling - Ningan - Dunhua City, east of the line to China and North Korea, China-Russia border. Administrative divisions belong to northeastern Jilin and southeastern Heilongjiang, respectively, with an area of about 100,000 km2.1. Metallogenic belt Geological setting In the middle and late Cambrian of this area-Ordovician and Silurian are in eroded and eroded environment and do not accept the corresponding sedimentation. In the southern part of this area, due to the subduction of the Ordovician-Silurian plate since the Paleo-Asian Ocean Plate,