CHIME AGES OF CRETACEOUS GNEISSIC GRANITOIDS IN THEPINGTAN-DONGSHAN BELT,FUJIAN, CHINA
CHIME AGES OF CRETACEOUS GNEISSIC GRANITOIDS IN THE PINGTAN-DONGSHAN BELT,FUJIAN, CHINA
摘要
A method of isotopic age determination. CHIME (chemical Th-U-total Pb isochron method) for dating radioactive minerals, is introduced briefly in this paper. The monazite. xenotime and zircon from the gneissic granitoids in the Pingtan-Dengshan belt, Fujian. yield CHIME ages of 92. 7 Ma. 94. 4 Ma. 107. 1 Ma and 108. 2 Ma. reconfirming the Yanshanian granitism in southeast coast area of China.
A method of isotopic age determination. CHIME (chemical Th-U-total Pb isochron method) for dating radioactive minerals, is introduced briefly in this paper. The monazite. xenotime and zircon from the gneissic granitoids in the Pingtan-Dengshan belt, Fujian. yield CHIME ages of 92. 7 Ma. 94. 4 Ma. 107. 1 Ma and 108. 2 Ma. reconfirming the Yanshanian granitism in southeast coast area of China.
