Ganade de Araujo, Carlos E.
Weinberg, Roberto F.
Cordani, Umberto G.
Total Authors: 3
 Univ Sao Paulo, BR-05508900 Sao Paulo - Brazil
 Geol Survey Brazil SGB, CPRM, BR-60135101 Fortaleza, CE - Brazil
 Monash Univ, Clayton, Vic 3800 - Australia
Total Affiliations: 3
Web of Science Citations:
We propose that the development of the Borborema Province from 620 to 570Ma resulted from two discrete collisional events. Collision I, along the West Gondwana Orogen on the west side of the Province, took place at c. 620-610Ma as the result of collision between the Parnaiba Block, as the forefront of the much larger Amazonian-West Africa Craton, and the old basement of the Borborema Province. The suture zone related to this collision was reactivated by a dextral transform zone (the Transbrasiliano Lineament), allowing the Borborema Province to approach and collide against the Sao Francisco Craton in the south at c. 590-580Ma marking collision II along the Sergipano Orogen. The combined stresses related to eastward push from collision I and northward push from the cratonic indentation into a thickened lithosphere gave rise to an extensive network of strike-slip shear zones across the Province, forcing its northeastward extrusion. (AU)