LA-ICP-MS zircon U-Pb ages of quartz-andesite in Daqingshan area, Inner Mongolia and its tectonic significance

Weighted average zircon ²⁰⁷Pb/²⁰⁶Pb age of 1870±19Ma was obtained from the quartz-andesite cut by the thrusting structure in Daqingshan area, Inner Mongolia. The quartz-andesite is the product of a breakup event between multi-stage rifting in the late Paleoproterozoic to Neoproterozoic period in North China. At the same time, according to the ²⁰⁶Pb/²³⁸U age of 436±4Ma from the concordant zircon (No. 06) of the basalt-andesite and the ²⁰⁶Pb/²³⁸U ages of 153±2Ma and 160±2Ma from the concordant zircons (No. 15 and 29) of the quartz-andesite, the structural revival and structural tracing phenomena exist in the thrusting tectonics in Daqingshan area. The results obtained by the authors have accumulated new information and provided new theoretical thinking for the study of thrusting tectonics in Daqingshan area.