Geodynamic settings of Mesozoic large-scale mineralization in the North China and adjacent areas: implication from the highly precise and accurate ages of metal deposits

摘要

Based on the summary of the highly precise dating data of the metal deposits and related granitic rocks in North China craton and adjacent areas, such as the molybdenite Re-Os datings, ~(40)Ar-~(39)Ar dating of mica, K-feldspar and quartz, some Rb-Sr isochrons, and the SHRIMP zircon U-Pb dating and single grain zircon U-Pb dating, we suggest that the large-scale mineralization in North China craton and adjacent areas took place in three periods of 200～160Ma, 140Ma, and 125～110Ma. Their corresponding geodynamic settings are proposed to be the collision orogenic process between North China and Yangtze cratons, transformation of the tectonic regime, and delamination of the lithosphere, respectively, in light of the analyzing the Mesozoic geodynamic evolution in the North China craton.