The protoliths of the paragneisses belong to clay–silty rocks and greywacke.
The sediments of the protoliths were derived from an intermediate–acidic source.
The Archean–early Paleoproterozoic granitic rock in Jiaobei was the major source.
The protoliths of the paragneisses might have been deposited during 2.47–2.42 Ga.
The protoliths of the paragneisses were deposited in a convergent margin setting.