本文利用单颗粒锆石U-Pb同位素方法对大吉山补体花岗岩（铌&钽矿体的母岩）进行了成岩年龄测定，获得其侵位年龄为151.7±1.6Ma；
By means of the single-zircon U-Pb isotopic method , the intrusion age is reported in this paper , which is 151.7 ± 1.6 Ma for a patched granite body ( the source granite for Nb-Ta ) .
大吉山