Journal article

Compressional reworking of the East African Orogen in the Uluguru Mountains of eastern Tanzania at c. 550 Ma: implications for the final assembly of Gondwana

Federico Rossetti, Domenico Cozzupoli, David Phillips

Terra Nova | WILEY | Published : 2008

Abstract

The Uluguru Mountains of eastern Tanzania represent a key area to unravel the tectonic history of Gondwana assembly along the Neoproterozoic East African Orogen. On the basis of combined structural and Ar/ Ar geochronological investigations, we have re-interpreted the structural architecture of the region. Texturally-late, ductile to cataclastic low-angle tectonic contacts are recognized, which delimit the contacts between the main lithological units that form a post-metamorphic, NW-verging nappe stack. Ar/ Ar geochronology places this nappe-forming event at c. 550 Ma, post-dating tonalitic dyke emplacement at c. 580 Ma. Results from this study (i) demonstrate that a distinct and later epi..

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