Extruding the Borborema Province (NE-Brazil): a two-stage Neoproterozoic collision process

Author(s)

Ganade de Araujo, Carlos E. ^{[1, 2]} ; Weinberg, Roberto F. ^[3] ; Cordani, Umberto G. ^[1]

Affiliation

^[1] Univ Sao Paulo, BR-05508900 Sao Paulo - Brazil

^[2] Geol Survey Brazil SGB, CPRM, BR-60135101 Fortaleza, CE - Brazil

^[3] Monash Univ, Clayton, Vic 3800 - Australia

• Document type: Journal article
• Source: TERRA NOVA; v. 26, n. 2, p. 157-168, APR 2014.
• Web of Science Citations: 37

Abstract

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)

• FAPESP's process: 12/00071-2 - Geochronological and thermochronological constraints on the high grade rocks related to the neoproterozoic orogenesis in the vicinities of the Transbrasiliano-Kandi Lineament (NE-Brazil - NW Africa)
• Grantee: Umberto Giuseppe Cordani
• Support Opportunities: Regular Research Grants
• FAPESP's process: 05/58688-1 - South America in the context of supercontinents: fusion and fission
• Grantee: Miguel Angelo Stipp Basei
• Support Opportunities: Research Projects - Thematic Grants