Abstract: Kuanping Granite in Eastern Qinling Mountains is a calc alkaline granite formed after the collision of the Northern China Plate and Yangzi Plate.There are granitic pegmatite dikes occure in the granite or the strata near it.Through geochemical analysis,by using A/CNK-A/NK diagram and R₁-R₂ tectonic environment identification method of rare elements,the results show that the formation of granitic pegmatite dikes in the area has a certain inheritance with Kuanping Granite,and the granitic pegmatite dikes is the products of the late hydrothermal magmatic crystallization.Through the comparative anlysis of rare elements in rock mass and pegmatite dikes,ore polyelement analysis and semiquantitative spectrometric analysis,it is concluded that the enrichment of rubidium is closely related to the content of potassium in pegmatite,whitch can also provide the prospecting directions of pegmatite type rubidium deposit in Shandan Region in Eastern Qinling Mountains.

Key words: Pegmatite type rubidium deposit, Kuanping granite, Granitic pegmatite, Peraluminous rocks