The base age of the Changchengian System at the northern North China Craton should be younger than 1670 Ma:Constraints from zircon U-Pb LA-MC-ICPMS dating of a granite-porphyry dike in Miyun County,BeijingHuaikun Li, LU Song-nian, Zhou Hong-ying et al.|Dixue Qianyuan|2011Cited by 68