(1) Faculty of Geology and Resources, China University of Geosciences, 100083 Beijing, China;(2) Institute of Geomechanics, Chinese Academy of Geological Sciences, 100081 Beijing, China
Abstract:
A dating of two biotite samples taken from the meso- and low-temperature mylonites within the Shangyi-Chicheng fault belt on the north of the North China Craton yields 40Ar/39Ar isotopic ages of (399 ± 1) Ma and (263 ± 2) Ma, respectively. These data reflect an Early Devonian deformation and a Late Carboniferous retrograde metamorphism event along the fault, suggesting that the tectonic activities of the North China Craton in Paleozoic should be reconsidered.
