Metallogeny during continental outgrowth in the Columbia supercontinent: Isotopic characterization of the Zhaiwa Mo–Cu system in the North China Craton

The Eastern Qinling Molybdenum Belt (EQMB) in central China represents the largest Mo province in the world. Located at the southern margin of the North China Craton, this Mo province is largely associated with Mesozoic granitoids. Here we report Re–Os isochron age of 1761 ± 33 Ma (2σ, MSWD = 2.9) from molybdenite in the recently discovered Zhaiwa porphyry Mo–Cu system within the EQMB. This age coincides with the peak eruption period (1.78−1.75...