Abstract
The Xiong’ershan district is located on the southern margin of the North China Craton and is the second largest Au area in Henan Province, China. It contains Mesozoic hydrothermal Au and Ag, Pb and Mo deposits. The deposits can be classified into different types: cryptoexplosive breccia type Au deposits, structural alteration type Au, Ag and Pb deposits, and porphyry type Mo deposits. The porphyry type Mo deposit formed earlier than other types of deposits. Various deposits formed in an extensional environment that resulted from rapid lithospheric thinning in eastern China during 140–120 Ma, and the combination of a tectono-thermal event and deep deep-seated magmagtic ore fluids and meteoric water that resulted in the formation of large-scale hydrothermal mineralization.
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