The Pre-Sinian basement strata exposed in the North Kunlun Massif are Later Archean -Neoproterozoic Milan Group, Changcheng System Kaqiang Group, Jixian System Liushui Formation and Qingbaikou System Sulu Formation.

• 被蛇绿岩所分隔的昆北地块上出露的前震旦纪基底地层为：晚太古代-新元古代米兰岩群，长城系卡羌岩群，蓟县系流水岩组和青白口系丝路岩组。