T31F:
The Evolution and Architecture of Rifts and Rifted Passive Margins: From Mantle Dynamics to Surface Processes

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Session ID#: 31503

Session Description:
The formation of rifted continental margins by extension of continental lithosphere leading to seafloor spreading is a complex and still poorly understood component of the plate tectonic cycle. New observations and modelling allow us to investigate the underlying processes. Key questions to be resolved include 1) factors controlling geometry and crustal architecture or rifted margins, 2) controls on the structural style of rift and passive margin formation 3) factors controlling the 3-dimensional geometry of rifts and passive margins, 4) processes responsible for anomalous vertical motions during basin evolution, 5) fundamental controls on the magmatic or a-magmatic nature of rifts and passive margins, 6) interaction between surface processes, tectonics, and climate during rift-passive margin evolution. We encourage abstracts that offer new insights into crustal and lithospheric architecture and processes underlying rift-passive margin formation as well as smaller scale studies of individual sedimentary basins, using constraints from observations and modelling.
Primary Convener:  Ritske S Huismans, University of Bergen, Department of Earth Science, Bergen, Norway
Conveners:  Magdalena Scheck-Wenderoth, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Geosystems, Potsdam, Germany and Luc Lavier, University of Texas at Austin, Institute for Geophysics, Austin, TX, United States
Chairs:  Magdalena Scheck-Wenderoth, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Geosystems, Potsdam, Germany and Ritske S Huismans, University of Bergen, Department of Earth Science, Bergen, Norway
OSPA Liaison:  Ritske S Huismans, University of Bergen, Department of Earth Science, Bergen, Norway

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

8105 Continental margins: divergent [TECTONOPHYSICS]
8109 Continental tectonics: extensional [TECTONOPHYSICS]
8169 Sedimentary basin processes [TECTONOPHYSICS]
8178 Tectonics and magmatism [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Rates of mantle cooling and exhumation during rifting constrained by REE‐in‐pyroxene speedometry (Invited) (236635)
Andrew Smye, Pennsylvania State University Main Campus, Department of Geosciences, University Park, United States, Spencer Seman, Pennsylvania State University Main Campus, Department of Geological Sciences, University Park, PA, United States, Michael R Hudak, University of Oregon, Department of Earth Sciences, Eugene, OR, United States; Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States and Katherine L Crispin, Pennsylvania State University Main Campus, Materials Characterization Laboratory, University Park, PA, United States
Continentward-Dipping Normal Faults, Boudinage and Ductile Shear at Rifted Passive Margins (272009)
Camille Noël Clerc1,2, Jean-Claude Ringenbach3, Laurent Jolivet4 and Jean-François Ballard3, (1)Organization Not Listed, Washington, DC, United States, (2)Université de la Nouvelle-Calédonie, Institut des Sciences Exactes et Appliquées (ISEA), Nouméa, New Caledonia, (3)TOTAL - Centre Scientifique et Technique Jean Feger, Pau, France, (4)University of Orleans, Orleans, France
Evolution of Parnaíba Cratonic Basin, Northeast Brazil (281560)
Verónica Rodríguez Tribaldos1, Nicholas Jeremiah White1, Diogo L.O. Coelho2 and Jordi Julià2, (1)University of Cambridge, Department of Earth Sciences (Bullard Laboratories), Cambridge, United Kingdom, (2)UFRN Federal University of Rio Grande do Norte, Departamento de Geofísica, Natal, Brazil
Mechanical constraints on fault geometries and structural styles in extensional geologic settings (291662)
Amanda N Hughes, University of Arizona, Geosciences, Tucson, AZ, United States
3D modeling of coupled tectonics and surface processes: the role of active erosion/deposition in continental rift systems (257551)
Nicolas Riel Jr, University of Bergen, Earth sciences, Bergen, Norway, Ritske S Huismans, University of Bergen, Department of Earth Science, Bergen, Norway and Dave May, University of Oxford, Department of Earth Sciences, Oxford, United Kingdom

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