An area of high grade basement in the Ruangwa District, southern Tanzania was mapped. Four granitoid bodies of varying composition, structure and age sampled for U-Pb zircon dating. Granitoids gave ages of ca. 900, 650, 600 and 550Ma. Study area has affinities with segments to the north (Tanzania-Kenya) and south (Mozambique). New U-Pb zircon LA-ICP-MS data are pre...