Sequence Stratigraphy Applied to Continental Rift BasinsExample from Recôncavo Basin, Brazil

2012 ◽  
Author(s):  
Andre Picarelli ◽  
Vitor Abreu
Keyword(s):  
Sequence Stratigraphy ◽  
Continental Rift ◽  
Rift Basins

scholarly journals Rift zone-parallel extension during segmented fault growth: application to the evolution of the NE Atlantic

2017 ◽  
Author(s):  
Alodie Bubeck ◽  
Richard J. Walker ◽  
Jonathan Imber ◽  
Robert E. Holdsworth ◽  
Christopher J. MacLeod ◽  
...  
Keyword(s):  
Rift Zone ◽  
Vertical Axis ◽  
Continental Rift ◽  
Normal Faults ◽  
Ne Atlantic ◽  
Rift Basins ◽  
Volume Increase ◽  
Bookshelf Faulting ◽  
Fault Growth ◽  
Parallel Extension

Abstract. The mechanical interaction of propagating normal faults is known to influence the linkage geometry of first-order faults, and the development of second-order faults and fractures, which transfer displacement within relay zones. Natural examples of growth faults from two active volcanic rift zones (Koa’e, Big Island, Hawaii and Krafla, northern Iceland) illustrate the importance of relay zone heave gradients and associated vertical axis rotations in evolving continental rift systems. Detailed field mapping of deformation within two relay zones, located at the tips of en echelon rift faults, reveals pronounced heave displacement deficits that are accommodated by: (1) extensional-shear faults that strike at a low angle ( 45°) and accommodate a significant component of rift zone-parallel extension. Such extension parallel to the rift axis may oppose any shear-induced shortening that is typically required for vertical axis rotations (e.g. bookshelf faulting models). At the surface, this volume increase is accommodated by open fractures, but may be accommodated in the subsurface by veins or dikes oriented oblique- and normal to the rift axis. This proposal is consistent with data from exhumed contemporaneous fault and dike systems seen on the Faroe Islands and in Kangerlussuaq (East Greenland). Based on the findings presented here we propose a new conceptual model for the evolution of segmented continental rift basins on the NE Atlantic margins.

Terrestrial heat flow in the Malawi Rifted Zone, East Africa: Implications for tectono-thermal inheritance in continental rift basins

2019 ◽  
Vol 387 ◽  
pp. 106656 ◽  
Author(s):  
Emmanuel A. Njinju ◽  
Folarin Kolawole ◽  
Estella A. Atekwana ◽  
D. Sarah Stamps ◽  
Eliot A. Atekwana ◽  
...  
Keyword(s):  
Heat Flow ◽  
East Africa ◽  
Continental Rift ◽  
Rift Basins ◽  
Terrestrial Heat Flow
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