The Dashankeng gneiss located in the northeastern Dabie mountains is composed mainly of potassium feldspar, plagioclase and quartz with minor hornblende, biotite and allanite, belonging to monzonitic granitic in composition.

• 北大别东部大山坑片麻岩主要由钾长石、长石和石英组成,少量角闪石、云母和褐帘石,成分为二长花岗质。