Generation of late Mesozoic felsic volcanic rocks in the Hailar Basin, northeastern China in response to overprinting of multiple tectonic regimes.

We performed zircon U-Pb age dating and geochemical analyses of late Mesozoic felsic volcanic rocks in the Hailar Basin, NE China, with the aim of eclucidating their emplacement ages, origin and geodynamic significance. The volcanic rocks consist of dacites, rhyolites and rhyolitic tuffs. Laser ablation-inductively coupled plasma-mass spectrometry zircon U-Pb dating results suggest that the rocks were erupted during the Late Jurassic-Early Cretaceous (161-117 Ma).