Their geochemical characteristics indicate feature of alluminum-high gneiss,whose protolith were trondhjemite—tonalite—granodiorite(TTG rock series),so providing the evidence of Early Precambrian Granite—Greenstone be.

They are a series of rock combinations of quartz diorite-tonalite-trondhjemite-granodiorite (TTG rock series) which are relatively conformity with each other in time and space.

This paper concludes that the supercrustal rocks are the original host and the TTG complexes intorrupted the continuity of the host and the supercrustal rocks occur as floating residuals or inclusions in the TTG complexes.

Phase equilibrium and trace element partitioning between minerals and melt in the metabasalt system: constraints on the formation conditions of TTG/adakite magmas and the growth of early continental crust;