Rb-Sr isochron age of Tiantang Cu-Pb-Zn polymetallic deposit in Guangdong Province and its geological significance

The ages of the Tiantang Cu-Pb-Zn polymetallic deposit were determined by the Rb-Sr isochron method through dating samples of sphalerite and three groups of intergrown mineral assemblage(pyrite and galena).The selected samples included eight pieces of sphalerite,three pieces of galena and one piece of pyrite.In contrast with sphalerite age of(98.1±1.6)Ma and sphalerite + galena pyrite assemblage age of(99±2)Ma,the authors also obtained...