Zircon LA-ICP-MS U-Pb age of ignimbrite from Zenong Group in Coqen area of the central Gangdese belt, Tibet, China.

To ascertain the genesis and regional correlation, the authors measured the LA-ICP-MS zircon U-Pb ages of ignimbrite from Zenong Group widely developed in the Coqen area. LA-ICP-MS zircon U-Pb ages of two ignimbrite samples are respectively 112.7±1.0Ma and 108.6±1.6Ma. According to the chronological data, geochemical data and latest 1∶250000 regional geological survey results obtained, the authors believed the Zenong Group volcanic rocks in the northern central Gangdese were most likely associated with southward subduction of Bangong Co-Nujiang Tethys oceanic crust.