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Hydrothermal clay minerals that formed in the main metallogenic stage of the Changkeng disseminated-type gold deposit in central Guangdong were analyzed by the40Ar/39Ar laser probe. The results give Ar-Ar isochron ages of 109.9 ±1.4 to 110.1 ±1.3 Ma, which are 30 to 50 Ma older than the age of silver ore bodies in the deposit. Both gold and silver mineralizations were not related to hidden granite...
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