Chuankeng copper mine is located between Pingxiang-Guangfeng-Jiangshan deep fault zone and north Wuyi hidden deep fault zone

which on the north of eastern section depression in southern Shangrao. In this paper

the quartz-monzonite porphyry that closely related to metallogenesis in Chuankeng copper mine area is taken as the study object

and the genesis of quartz-monzonite porphyry is discussed with the theoretical method of rock geochemistry. The findings indicate that the quartz-monzonite porphyry in Chuankeng area contains high K（ω（K2 O）=2.76%-4.11%）

high Na（ω（Na2 O）=2.56%-4.67%）

high-K calc-alkaline series with quasi aluminum-weak aluminous characteristics. The ΣREE contents（115-234）×10-6 with strongly REE enrichment

represented by right-inclined REE distribution mode

and [ω（La）/ω（Yb）]N value of 24.4-57.8. No obvious Ce and Eu anomalies were observed（ω（Ce）/ω（Ce*）=0.97-1.05

ω（Eu）/ω（Eu*）=0.80-1.10）

while the trace elements show relatively enriched Rb、Ba、Th、K、Sr、Hf and relatively lacking Nb、Ta、Zr、P、Ti.The quartz-monzonite porphyry in Chuankeng area belongs to adakitic I-type granite

and formed in the compression and relaxation environment after the oblique subduction of the paleo-pacific plate

which is the magma product of partial melting of rutile eclogite that enriched in the thickened lower crust basaltic

and has a great porphyry copper metallogenic potential.