The Nellore–Khammam schist belt, SE India, is sandwiched
in between the Proterozoic Eastern Ghats terrane and the
Archaean Dharwar–Bastar craton. We report Sm–Nd and
Rb–Sr mineral isochron ages of amphibolite from the schist
belt. The Sm–Nd and Rb–Sr ages are 824±43 Ma and
481±16 Ma, respectively. The Sm–Nd age indicates the timing
of peak metamorphism, whereas the Rb–Sr age indicates
the Pan-African thermal overprint. The peak metamorphism
was related to collision of the Eastern Ghats terrane
with the Dharwar-Bastar craton, which occurred during
early Neoproterozoic time.