T44A:
Continental Rifts and Passive Margins: Geology, Geophysics, Geodynamics

Submit an Abstract to this Session



Session ID#: 31205

Session Description:
This session invites contributions on rifts and rifted margins that integrate new data sets, approaches or viewpoints. Studies can range from the outcrop to the basin or lithospheric plate scale, and include global examples. Innovative concepts and techniques based on field geology, seismology, geodesy, marine geophysics, plate reconstructions, geochemistry, sedimentology, or modeling are encouraged. Topics may include but are not limited to fault dynamics, shear zones, tectono-magmatic and sedimentary processes, impact of volatiles, the continent-ocean transition, influence of mantle dynamics and surface processes, and the role of tectonic inheritance. We particularly encourage submissions that explore along-strike structural and magmatic variations in rifts and passive margins linked to 3D modeling studies. Emphasis will be given to presentations conveying an integrated picture by bridging spatial or temporal scales, or by combining results from active rifts, failed rift arms, passive margins or fossil rifted margins exposed in mountain belts.
Primary Convener:  Carolina Pagli, GFZ German Research Centre for Geosciences, Potsdam, Germany
Conveners:  W Roger Buck, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, Patricia Persaud, Louisiana State University, Baton Rouge, LA, United States and Gianreto Manatschal, University of Strasbourg, Strasbourg Cedex, France
Chairs:  Carolina Pagli, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Carolina Pagli, Università di Pisa, Dipartimento di Scienze della Terra, Pisa, Italy
OSPA Liaison:  Carolina Pagli, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany

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

8105 Continental margins: divergent [TECTONOPHYSICS]
8109 Continental tectonics: extensional [TECTONOPHYSICS]

Abstracts Submitted to this Session:

The origin and evolution of silicic magmas during continental rifting: new constraints from trace elements and oxygen isotopes from Ethiopian volcanoes (Invited) (250204)
William Hutchison1, Adrian Boyce2, Tamsin A Mather1, David M Pyle1, Gezahegn Yirgu3 and Matthew L. M. Gleeson4, (1)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom, (2)Scottish Universities Environmental Research Center at the University of Glasgow, East Kilbride, United Kingdom, (3)Addis Ababa University, School of Earth Sciences, Addis Ababa, Ethiopia, (4)University of California Berkeley, Earth and Planetary Science, Berkeley, United States
Imaging an off-axis volcanic field in the Main Ethiopian Rift using 3-D magnetotellurics (215577)
Juliane Huebert, British Geological Survey, Edinburgh, United Kingdom, Kathryn A Whaler, Univ Edinburgh, School of GeoSciences, Edinburgh, United Kingdom, Shimeles Fisseha, Addis Ababa University, IGSSA, Addis Ababa, Ethiopia and Colin Hogg, Dublin Institute for Advanced Studies, Dublin, Ireland
Magma-Tectonic Interactions in the Main Ethiopian Rift; Insights into Rifting Processes (240247)
Tim Greenfield1, Derek Keir2, Tesfaye Temtime Tessema3, Ryan Lloyd4, Juliet Biggs5, Atalay Ayele Wondem6 and J Michael Kendall3, (1)University of Southampton, Southampton, SO14, United Kingdom, (2)University of Southampton, Ocean and Earth Sciences, Southampton, United Kingdom, (3)University of Bristol, Bristol, BS8, United Kingdom, (4)University of Bristol, Bristol, United Kingdom, (5)University of Bristol, School of Earth Sciences, Bristol, United Kingdom, (6)Addis Ababa University, Addis Ababa, Ethiopia
A Geodynamic model for melt generation and evolution of the Mid-Continental Rift (227465)
Prasanna Mahesh Gunawardana, Syracuse University, Syracuse, NY, United States, Robert Moucha, Syracuse University, Earth and Environmental Sciences, Syracuse, United States, Tyrone O Rooney, Michigan State University, Department of Earth and Environmental Sciences, East Lansing, United States, Seth Stein, Northwestern University, Earth & Planetary Sciences and Institute for Policy Research, Evanston, IL, United States, Carol A Stein, Univ. of Illinois at Chicago, Chicago, IL, United States and Megan Hansen, Colorado School of Mines, Golden, CO, United States
Magma-poor vs. magma-rich continental rifting and breakup in the Labrador Sea (241430)
Mohamed Gouiza and Douglas Paton, University of Leeds, School of Earth and Environment, Leeds, United Kingdom
Two types of SDR recognised in pre-stack velocity analysis of ultra-long-offset seismic reflection data in the South Atlantic (239097)
Jenny Collier1, Carl McDermott2, Lidia Lonergan3, Ken McDermott4 and Paul Bellingham4, (1)Imperial College London, Department of Earth Science and Engineering, London, United Kingdom, (2)Imperial College London, London, United Kingdom, (3)Imperial College London, London, SW7, United Kingdom, (4)ION Geophysical, Chertsey, Surrey, United Kingdom
Origin, Composition and Relative Timing of Seaward Dipping Reflectors on the Pelotas Rifted Margin, South Atlantic (271306)
Caroline Jayne Harkin, University of Liverpool, Liverpool, L69, United Kingdom, Nick Kusznir, University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, Alan Roberts, Badley Geoscience, Spilsby, United Kingdom, Gianreto Manatschal, Université de Strasbourg, CNRS, ITES UMR 7063, Strasbourg Cedex, France and Ken McDermott, ION Geophysical, Chertsey, United Kingdom
Constraints on the Lithospheric Strength at Volcanic Rifted Margins from the Geometry of Seaward Dipping Reflectors Using Analytic and Numerical Models (265418)
Dr. Xiaochuan Tian, PhD, Lamont -Doherty Earth Observatory of Columbia University, New York, NY, United States and W Roger Buck, Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States

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