Resumen de Fission-Track dating of Macusanite glasses using natural uranium and thorium thin films neutron dosimetry.

A.M. Osorio, P.J. lunes, G. Bigazzi, J.C. Hadler, M.A. Laurenzi, P. Norelli, C.A. Tello, Sandro Guedes, S.R. Paulo

• Fission-Track Method, FTM, urn applied to obtain ages of Macusanite glasses from Peru. In order to obtain the data two irradiation were carried out at IPEN-CNEN reactor (Brazil). Natural uranium and thorium thin film neutron dosimetry together with a lho f8.5x I O'1 a ' were used to obtain the ages. The apparent ages were corrected using the Plateau Method and the Size Correction Method. The results showed a mean value close to 4.7 Ma, in agreement with some ages obtained using other dating methods.