Title

Regional analysis of necking domains in young, incipient and failed rifted margins from deformable plate tectonic models and geophysical data.

Authors

Ball, Philip; Peace, Alexander; Masini, Emmanuel; Stockli, Daniel; Bain, John; Welford, Kim

Abstract

Studies examining the margin evolution of the magma-poor Iberian-Newfoundland margins, defined the necking domain as the transition zone between hyperextended crust (i.e. 3. Therefore, if a region has a pre-rift crustal thickness of ~35 km, we assume that at <12 km, coupling processes will have succeeded. Then through examining different resultant crustal models and assumptions we map alternative necking domains and coupling lines, examining the impacts of the possible necking zones through palinspatic deformable plate (GPlates) reconstructions for the region. Using the deformable plate models, we investigate the relationship between necking, coupling and seafloor spreading processes within a plate kinematic framework. In addition, we elucidate the impact of magmatic thickening and how modified interpretations of the necking may be attempted in the Red Sea-Aden system, providing the first regional-necking domain model for the region. Our study highlights the importance of constraining the location of necking domains and the usefulness of deformable plate tectonic models in assessing kinematic constraints along frontier rifted margin.

Subjects

NEWFOUNDLAND & Labrador; GULF of Suez; PLATE tectonics; RIFTS (Geology); DATA modeling; MOHOROVICIC discontinuity

Publication

Geophysical Research Abstracts, 2019, Vol 21, p1

ISSN

1029-7006

Publication type

Academic Journal