The final rifting evolution at deep magma-poor passive margins from Iberia-Newfoundland: a new point of view

  title={The final rifting evolution at deep magma-poor passive margins from Iberia-Newfoundland: a new point of view},
  author={Gwenn P{\'e}ron‐Pinvidic and Gianreto Manatschal},
  journal={International Journal of Earth Sciences},
In classical rift models, deformation is either uniformly distributed leading to symmetric fault bounded basins overlying stretched ductile lower crust (e.g. pure shear McKenzie model) or asymmetric and controlled by large scale detachment faulting (simple shear Wernicke model). In both cases rifting is considered as a mono-phase process and breakup is instantaneous resulting in the juxtaposition of continental and oceanic crust. The contact between these two types of crusts is often assumed to… 

Tectonomagmatic evolution of the final stages of rifting along the deep conjugate Australian‐Antarctic magma‐poor rifted margins: Constraints from seismic observations

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Controls on the Thermomechanical Evolution of Hyperextended Lithosphere at Magma‐Poor Rifted Margins: The Example of Espirito Santo and the Kwanza Basins

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Most of the conceptual ideas concerning sedimentary architecture and tectonic evolution of deep rifted margins are based on either intracontinental rift basins or proximal margins, both of which

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Evolution of magma-poor continental margins from rifting to seafloor spreading

It is concluded that the evolving stress and thermal fields are constrained by a rising and narrowing ridge of asthenospheric mantle, and that magmatism and rates of extension systematically increase oceanward.

A mechanism to thin the continental lithosphere at magma-poor margins

It is shown that crustal thinning can be accomplished in extensional environments by a system of conjugate concave downward faults instead of multiple normal faults, and suggested that the observed transition from broadly distributed and symmetric extension to localized and asymmetric rifting is directly controlled by the existence of a strong gabbroic lower crust.

Breakup of the Newfoundland–Iberia rift

Abstract The Newfoundland–Iberia rift is considered to be a type example of a non-volcanic rift. Key features of the conjugate margins are transition zones (TZs) that lie between clearly continental

The rift-to-drift transition in the North Atlantic: A stuttering start of the MORB machine?

We report U-Pb and 39Ar-40Ar measurements on plutonic rocks recovered from the Ocean Drilling Program (ODP) Legs 173 and 210. Drilling revealed continental crust (Sites 1067 and 1069) and exhumed

Magmatism at the west Iberia non-volcanic rifted continental margin: evidence from analyses of magnetic anomalies

We discuss the magmatic development of the west Iberia non-volcanic rifted continental margin in the North Atlantic Ocean. So-called 'non-volcanic' rifted continental margins are characterized by a

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Abstract The Iberia Abyssal Plain segment of the West Iberia margin was drilled during Ocean Drilling Program Legs 149 and 173 and has been extensively studied geophysically. We present new