Detrital zircon U Pb ages , Hf isotopes and tectonic implications for Palaeozoic sedimentary rocks from the Xing-Meng Orogenic Belt , Middle-East Part of Inner Mongolia , China

DAPENG LI *, YUELONG CHEN, ZHONG WANG, KEJUN HOU and CHANGZHENG LIU 5 The School of Earth Sciences and Resources, China University of Geosciences, Beijing, P. R. China State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, P. R. China Geological Survey Institute of Inner Mongolia, Hohhot, P. R. China Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, P. R. China Fifth Institute of Geological and Mineral Exploration of Qinghai Provincial Bureau of Geology and Mineral Resources, Qinghai, P. R. China