The Beiling gold deposit, located in western Henan Province, is mainly hosted in the Majiahe Formation. The rocks are composed of basaltic andesites and andesties. In this paper, the petrological and geochemical characteristics of the volcanic rocks were studied to constrain the petrogenesis. The result shows that the volcanic rocks of the Majiahe Formation are rich in alkali, especially in K₂O. The mafic-intermediate rocks are characterized by a relatively low abundance. Their total amount of rare earth elements (ΣREE) is 154.60×10^-6~200.60×10^-6. They forms a LREE-enriched distribution[(La/Yb)_N=6.72~8.22] with the existence of weak negative Eu anomaly. In addition, the rocks display LILE enrichment (such as U, K, Pb and Nd) and HFSE depletion (such as Th, Nb, Ta, Ce, Zr and Ti). The chemical data presented in the paper show that the Majiahe Formation rocks had a modified mantle source with ancient subduction belt materials. It is suggested that these volcanic rocks experienced a crystal fractionation process during the magmatic evolution. Comprehensive research shows that the Majiahe Formation was formed under a continental rifting environment.