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Extruding the Borborema Province ( NE ‐Brazil): a two‐stage Neoproterozoic collision process
Author(s) -
Ganade de Araujo Carlos E.,
Weinberg Roberto F.,
Cordani Umberto G.
Publication year - 2014
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/ter.12084
Subject(s) - geology , lithosphere , craton , collision , sinistral and dextral , gondwana , fibrous joint , shear zone , seismology , lineament , stage (stratigraphy) , tectonics , geochemistry , geomorphology , paleontology , medicine , computer security , anatomy , computer science
We propose that the development of the Borborema Province from 620 to 570 Ma resulted from two discrete collisional events. Collision I, along the West Gondwana Orogen on the west side of the Province, took place at c . 620–610 Ma as the result of collision between the Parnaíba 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 São Francisco Craton in the south at c . 590–580 Ma 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.