METALLOGENETIC EPOCH OF CHENLINGOU GOLD DEPOSIT IN THE CORE OF DABIESHAN OROGENIC BELT, LUOTIAN, HUBEI PROVINCE

Chenlingou and Guoyunao gold deposits are located in the core of Dabieshan orogenic belt.Rb-Sr dating for the fluid indusion from Chenlingou gold deposit reports 123.0±11 Ma;and K-Ar dating for the altered wallrocks of Guoyunao gold deposit is 103.0 Ma;which correspond to the age of granite intrusion in the region and the uplifing of Dabieshan orogenic belt,as well as the metallogenetic epoch of the ore belts on both sides of the orogenic belt.This result confirms that the metallogenetic epoch of deposit in the core of Dabieshan orogenic belt is Cretaceous.The metallogenesis is related to the delamination and de-rooting of Dabieshan orogenic belt.