摘要
///The Jinchuantang deposit is a large-sized skarn-type tinbismuth deposit in the Dongpo ore field.Direct Re-Os dating on molybdenites collected from the skarn ore in the Jinchuantang deposit have been carried out,in order to further restrict the age of mineralization.The results show that Re-Os model ages range from (157.2 ±2.8) Ma to (162.4±2.4) Ma,with an average of (159.8±2.9) Ma,and give an isochron age of (158.8±6.6) Ma. Coupled with previous studies in this region,it is suggested that mantle components were extensively involved in the petrologenic and metallogenic processes of the Mesozioc W-Sn polymetallic ore district,southern Hunan Province,indicating that the Middle-Late Jurassic explosive mineralization of this region is probably as results of crust-mantle interactions under a geodynamic setting of the lithospheric thinning and extension.