T43G:
One Rift, Two Rift, Magma-Rich Rift, Magma-Poor Rift: Deformation, Magmatism, Volatile Fluxes, and Their Consequences in the East African Rift System II

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Session ID#: 16575

Session Description:
The East African Rift system represents one of the largest active continental rift systems in the world, and it exhibits remarkable variability along its length in the amount and style of extension, seismicity, volcanism, volatile fluxes and surface morphology.  As such, the EARS presents a natural laboratory for investigating the controls on continental extension from initiation to final breakup and consequences for hazards, microclimate and ecosystems.  We invite abstracts from diverse fields (e.g., geochemistry, geodynamics, geology, geophysics) focused on elucidating the evolution of tectonic deformation, magmatism, and volatile fluxes during continental rifting in the EARS and comparative studies of other extensional systems elsewhere around the globe.
Primary Convener:  Natalie J Accardo, Columbia University of New York, Palisades, NY, United States
Conveners:  Donna J Shillington, Columbia University of New York, Palisades, NY, United States, Tobias P Fischer, University of California, Santa Barbara, Santa Barbara, United States and Juliet Biggs, University of Bristol, COMET, School of Earth Sciences, Bristol, United Kingdom
Chairs:  Natalie J Accardo, Columbia University of New York, Palisades, NY, United States and Donna J Shillington, Columbia University of New York, Palisades, NY, United States
OSPA Liaison:  Natalie J Accardo, Columbia University of New York, Palisades, NY, United States
Co-Organized with:
Volcanology, Geochemistry and Petrology, Volcanology, Geochemistry and Petrology, Seismology, Geodesy, and Earth and Planetary Surface Processes

Cross-Listed:
  • EP - Earth and Planetary Surface Processes
  • G - Geodesy
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • EP - Earth and Planetary Surface Processes
  • G - Geodesy
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

1037 Magma genesis and partial melting [GEOCHEMISTRY]
1209 Tectonic deformation [GEODESY AND GRAVITY]
7230 Seismicity and tectonics [SEISMOLOGY]
8109 Continental tectonics: extensional [TECTONOPHYSICS]

Abstracts Submitted to this Session:

A plume beneath western Ethiopia! (Invited) (121788)
Katie M Keranen1, Anant Hariharan1, Sisay Alemayehu2, Atalay Ayele Wondem2 and Ian D Bastow3, (1)Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, (2)Addis Ababa University, Institute of Geophysics, Space Science, and Astronomy, Addis Ababa, Ethiopia, (3)Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom
Quantifying strain partitioning between magmatic and amagmatic portions of the Afar triple junction of Ethiopia and Djibouti through use of contemporary and late Quaternary extension rates (159530)
Sean G Polun1, Kelly Hickcox2, Samson Tesfaye3 and Francisco G Gomez2, (1)University of Missouri, Department of Geological Sciences, Columbia, United States, (2)University of Missouri Columbia, Dept. Geological Sciences, Columbia, MO, United States, (3)Lincoln Univ-Coop Reseacrh, Jefferson City, MO, United States
Continental breakup, the final stretch: seismic reflection and borehole evidence from the Danakil Depression, Ethiopia (143638)
Ian D Bastow, Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, Adam D Booth, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Giacomo Corti, Instituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Florence, Italy, Derek Keir, University of Southampton, Ocean and Earth Sciences, Southampton, United Kingdom; University of Florence, Department of Earth Sciences, Florence, Italy, Craig Magee, University of Leeds, Leeds, LS2, United Kingdom, Christopher Aiden-Lee Jackson, Imperial College London, Department of Earth Science and Engineering, London, United Kingdom and Wilkinson Jason, Allana Potash, Addis Ababa, Ethiopia
Transient deformation in the Asal-Ghoubbet Rift (Djibouti) since the 1978 diking event: Is deformation controlled by magma supply rates? (140561)
Delphine Smittarello, ISTerre Institute of Earth Sciences, Saint Martin d'Hères, France, Raphael Grandin, Université de Paris Cité, Institut de Physique du Globe de Paris, CNRS, Paris, France, Jean-Bernard de Chabalier, Institut de Physique du Globe de Paris, Paris, France, Cecile Doubre, Université de Strasbourg, IPGS, École et Observatoire des Sciences de la Terre, Strasbourg, France, Aline Deprez, École et Observatoire des Sciences de la Terre, Institut Terre et Environnement de Strasbourg, Centre National de la Recherche Scientifique, University of Strasbourg, Strasbourg, France, Frederic Masson, Univ Strasbourg, Strasbourg Cedex, France, Anne Socquet, University Grenoble Alpes, ISTerre Institute of Earth Sciences, Grenoble, France and Saad Ibrahim Ahmed, Geophysical Observatory of Arta, Arta, Djibouti
Geophysical observations on the inter-relationships between magmatism, faulting and hydrological processes at a large rift caldera  (138126)
Ryan Lloyd1,2, Juliet Biggs2,3, Matthew Wilks1 and J Michael Kendall3, (1)University of Bristol, Bristol, United Kingdom, (2)COMET, Bristol, United Kingdom, (3)University of Bristol, COMET, School of Earth Sciences, Bristol, United Kingdom
Intraplate Volcanism beneath Western Saudi Arabia: An enigmatic offshoot of the Afar mantle plume? (183623)
Adam JR Kent1, Robert A Duncan2, David W Graham1, Abdullah Mohammed Al-Amri3, Saeed A Alshaltoni4, Barry B Hanan5 and Jun-Ichi Kimura6, (1)Oregon State University, College of Earth, Ocean, & Atmospheric Sciences, Corvallis, OR, United States, (2)Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (3)King Saud University, Department of Geology and Geophysics, Riyadh, Saudi Arabia, (4)King Saud University, Riyadh, Saudi Arabia, (5)San Diego State University, San Diego, United States, (6)JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Geochemistry and fluxes of volatiles in the Magadi and Natron thermal springs, East African Rift (145508)
Hyunwoo Lee1, Tobias P Fischer1, James D Muirhead2, Cynthia J Ebinger3, Simon A Kattenhorn4, Zachary D Sharp1, Yuji Sano5 and Naoto Takahata6, (1)University of New Mexico Main Campus, Earth and Planetary Sciences, Albuquerque, NM, United States, (2)Syracuse University, Earth Sciences, Syracuse, NY, United States, (3)Tulane University, School of Science & Engineering, New Orleans, United States, (4)University of Alaska Anchorage, Geological Sciences, Anchorage, AK, United States, (5)Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan, (6)Atmosphere and Ocean Research Institute University of Tokyo, Kashiwa, Japan

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