Abstract: The Xiba rock mass is an important part of the Indosinian granite belt in the South Qinling orogenic belt,also an important magmatic activity product in Fengtai high ore concentration area.In recent years,more and more mineral exploration results have shown the genesis and magmatic activity of the deposits are closely related in the high ore concentration area.This paper chose the Xiba rock mass as the research object.Based on the study of petrographic and geochemical characteristics,it is believed that granodiorite,biotite adamellite,quartz diorite,and quartz monzodiorte had similar magmatic sources and were formed in emplacement of different phases.The magma mainly derived from partial melting of basic metaigneous rocks in the deep lower crust.The neutral and acidic magmatic rocks of the latter stage were important geological body for gold ore forming around Xiba rock mass.The study provides a new prospecting perspective for gold prospecting in Fengtai high ore concentration area.