Abstract: The Dazhuyuangou tungsten-molybdenum ore district is located at the junction of the southern margin of the North China block and the Qinling fold system，and the north side of the North Qinling structural belt.The ore-forming zone is located in the Au-Mo-rutile mineralization zone of the East Qinling metal-nonmetal mineralization belt in the Qinling-Dabie metallogenic province，which is a favorable area for finding tungsten-molybdenum polymetallic ore.Combined with results of 1∶50 000 high-precision magnetic measurement and 1∶50 000 water sediment measurement results，the regional metallogenic geological background is analyzed.In order to find out the geological mineralization conditions and the mineralization characteristics of the middle and deep areas in the mining area，systematic survey and exploration works such as the 1∶10 000 geological survey，1∶10 000 soil geochemical exploration and exploration of pit and drilling are carried out.With combination of geophysical and geochemical anomalies and ore-prospecting，the study results show that:①the tungsten-molybdenum ore deposit is mainly controlled by structure and rock mass，and the granodiorite porphyry body provides a mineral source for mineralization，the ore-bearing rocks are quartz schist of Kuanping Group and granodiorite porphyry，and often form ore-rich bodies in structural parts of faults or folds；②main body of the tungsten-molybdenum deposit is porphyry deposit，porphyry-type ore body is formed in the granodiorite porphyry in the inner contact zone，fine vein-like，disseminated tungsten-molybdenum ore body is formed in the outer contact zone of the quartz schist；③five large tungsten-molybdenum ore bodies are initially delineated in the mining area，the I1，I2， and I3 ore bodies occur in the quartz schist of the Kuanping Group，which is the quartz schist-type tungsten-molybdenum ore body，and the II1 and II2 ore bodies occur in the contact zone between the granodiorite porphyry and the quartz schist of Kuanping Group，which is a porphyry tungsten-molybdenum ore body；④three tungsten-molybdenum prospecting targets are delineated in the mining area （named as A，B and C），by engineering verification，there are hidden granodiorite porphyry bodies and multiple groups of tungsten-molybdenum ore bodies in the deep part of the project area，and two ore bodies of I1 and II1 in target area A are estimated，in which the （3341） resources reached a medium size.Based on the ore-forming geological conditions，sources of ore-forming materials and similar types of deposits in the mining area，it is considered that there are large prospecting potential in the middle and deep areas of Dazhuyuangou area，which is worthy of further investigation.

Key words: W-Mo deposit, Deep prospecting, Porphyry-type deposit, Prospecting target area