Ar39/Ar40 dating of three typical gold
deposits in southern Qinling and
its implication
deposits in southern Qinling and
its implication
(1. Institute of Geology, Chinese Academy of Geological Sciences,
Beijing 100027, China;
2. Beijing Institute of Geology for Mineral Resources，
Beijing 100012, China)
Beijing 100027, China;
2. Beijing Institute of Geology for Mineral Resources，
Beijing 100012, China)
Abstract: Three types of gold deposits，which are the disseminated ore，auriferous quartz vein，and ore hosted in ductile shear zone have been identified in southern Qinling. The dating of the Baguamiao gold deposit in Fengxian, Xiaogouli gold deposit in Chengxian and Shangjiagou gold deposit in Kangxian gave rise to plateau age s (131.91±0.89)Ma, (197.45±1.13)Ma and (161.59±0.56)Ma respectively, consistent with the isochron ages. It is indicated that the metallization occurred in late Indosinian and early Yanshannian. The Ar39/Ar40 dating affirms their metal logenicages ranging from (131.91±0.89)Ma to (197.45±1.13)Ma which couple with the epoch in which the continent-continent collision and intracontinent orogene took place. Consequently, it is suggested that the collision-orogene, magmatic intrusion and location of gold deposits constitute an organic successive process. In line with the tectonic event, the large-scale metallization symbolizes the different representation of the same continental dynamics in the evolution of regional tectonics.
Key words: southern Qinling; gold deposit; plateau age; isochron age