Abstract:Shanyang-zhashui ore concentration area located the Late Paleozoic fore-arc basin of Mid-Qinling Orogenic Belt. There are Devonian and carboniferous strata in the ore concentration area, and a large number of Indosinian and Yanshanian magmatic intrusions exposed in the area. Extensive alteration and CuMo mineralization are occurred on the Yanshanian rocks and the contact between the rocks and strata. Through the research of minerals of the rocks, feldspars in the rocks are potash feldspar and plagioclase, and a part of the feldspars had occurred alteration; biotites are protogenetic magnesia biotite; hornblendes are belong to endenite and magnesia hornblende; chlorites are delessite. Meanwhile, sphene and apatite appear in the Yanshanian rocks. Based on the composition of biotite and hornblende, we deem the rocks exposed in Shangyang-zhashui ore concentration area are I type granite and with the crust-mantle mixed solvent characteristics, which were formed in the orogenic belt environment. The rocks have similar crystallization temperature, which are during 701 °C to 789 °C. Magma of the rocks is with higher oxgen fugacity. On the basis of chlorite, altered temperature of the rocks are estimated, 250~355 °C, in which the Chigou rock had the highest temperature. The altered temperature illustrated the hydrothermal fluids forming the alteration in the rocks are medium-high or medium temperature fluid. Compared the rocks in Shangyang-zhashui ore concentration area with the metallogenic rock bodies of typical large or super-large porphyry deposit and porphyry-skarn CuMoAu deposit, we can find the rocks researched have a lot of similar features with the typical deposit, in forming environment, magmatic source and oxgen fugacity. The contents of TiO2, Al2O3, CaO and the ratioes of K/Na, Mg/Fe, Mg/ (Mg+Fe3++ Fe2++ Mn) and (Fe3++ Fe2+)/ (Mg+Fe3++ Fe2+) are consistent with the typical deposit; the compositions of apatite in the rocks have some similar characteristics with the metallogenic rocks of typical deposit. However, the compositions of Ti, Si and AlIV+AlVI, Fe3++ Fe2+ of biotites in the rocks are different with the metallogenic rocks of typical deposit. And the volatile matters of apatite, as F, Cl and S, are lesser than the typical, especially the content of SO3, which is adverse to ore-forming elements deposit, as Cu or Mo. The rocks were forming a deeper depth, which is a disadvantage for forming large scale mineralization. As a whole, the Yanshanian rocks in Shangyang-zhashui ore concentration have some advantage for forming porphyry or porphyry-skarn deposit, but there are some adverse conditions. Although the rocks are difficult to forming large porphyry or porphyry-skarn deposit, they have the potential to forming small and medium size deposit, so we also need to attach importance to the rocks in ore prospecting work in the future.