The Qinghu monzonite was formed by the cooling and crystallization of the magma derived from the lower crust layer. It belongs to the intermediate rocks of the alkaline series, having 87Sr/esSr (apatite) of 0.70472±1 0.0004, and U-Pb (Zircon) isotope age of 158·4 Ma. Its REE abundance is 284.69 ppm, ∑Ce/ ∑Y=6.40, δEu=0.88. The majority of the REE of the rock body come from the deep-seated sourse, i. e. the lower crust layer, although a small preportion from surrounding rocks. As magma was crystallized and differentiated, REE in it were mainly deposited as RED mineral orthite, and REE-bearing amphibole, plagioclase and apatite, whdch are main REE carrier in the rocks,and play an impdstant role in REE immigrating and gathering in the weathering crust during the weathering and decdmposition of the rocks.