sedimentary gneiss
1.Chengdao oil field has a crystalline basement of Achaean granire gneiss and a sedimentary basement of Paleozonic carbonate rock or Mesozonic clastic rock.
2.This study recognized that original rocks of the felsic metamorphic rocks from a key horizon (termed K and K_S) in Guangchangling Archean Banded Iron Formation are tuffaceous intermediate acidic volcanic lava for biotite-quartz-albite gneiss (K) and tuffaceous sedimentary rock for garnet-mica-quartz schist (K_S) respectively.
3.The early Archaeozoic metamorphic complex in the west of Liaoning consists of 85%-90% of felsic gneiss including mainly pluntonic granitic complex with quartz diorite-granodiorite-granite (TTG) assemblage,and 10%~15% of upper crust rock including layered volcanic-sedimentary rock,dike rock and basic-uitrabasic instrusives.
