///Permian adakitic granodiorite and quartz-diorite in Bayinwula of Sonid Left Banner are distributed on the northern side of the Erlian-Hegen Mountain ophiolite zone. The 1:200 000 regional geological survey has assigned it to Late Variscan intrusive mass (γδ4(3)). Studies show that the rocks have characteristics of high aluminum (Al2O3=13.69%~16.48%), higher sodium (Na2O=3.53%~4.58%), lower potassium (K2O=2.12%~4.10%) and higher strontium (Sr=425.1×10-6~645.2×10-6), SiO2=62.13%~72.87%, Y<18×10-6(7.23×10-6~14.29×10-6), δEu=0.71~0.83. The fractionation of light-weight thulium is sharp and the partition curve of thulium forms a right-oblique model. Europium anomaly is not conspicuous, suggesting typical adakitic rock.