T51C:
One Rift, Two Rift, Magma-Rich Rift, Magma-Poor Rift: Deformation, Magmatism, Volatile Fluxes, and Their Consequences in the East African Rift System I Posters

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Session ID#: 12985

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 Accardo1, Juliet Biggs2, Donna J Shillington1 and Tobias P Fischer3, (1)Columbia University of New York, Palisades, NY, United States(2)University of Bristol, COMET, School of Earth Sciences, Bristol, United Kingdom(3)University of California, Santa Barbara, Santa Barbara, United States
OSPA Liaison:  Donna J Shillington, Columbia University of New York, Palisades, NY, United States
Co-Organized with:
Volcanology, Geochemistry and Petrology, Earth and Planetary Surface Processes, Geodesy, Seismology, and Volcanology, Geochemistry and Petrology

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:

Helium Isotope Variations in Basalts from the Gulf of Aden (143863)
David W Graham, Oregon State University, College of Earth, Ocean, & Atmospheric Sciences, Corvallis, OR, United States, Peter J Michael, University of Tulsa, Geosciences, Tulsa, OK, United States and Jean-Guy E Schilling, University of Rhode Island, Kingston, RI, United States
Trace element investigation of tephras from the Ledi-Geraru paleontological site in Afar, Ethiopia (196820)
Erin DiMaggio, Pennsylvania State University, University Park, PA, United States, Ramon Arrowsmith, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States, Christopher J Campisano, Arizona State University, Institute of Human Origins and School of Human Evolution and Social Change, Tempe, United States and Dominique Garello, Arizona State University, Tempe, AZ, United States
Geochemistry of Peralkaline Melts at Kone Volcanic Complex, Main Ethiopian Rift (158417)
Fiona Elizabeth Iddon1, Marie Edmonds1, Charlotte Jackson1, William Hutchison2,3, Tamsin A Mather3, Karen Fontijn3 and David M Pyle3, (1)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, (2)University of St Andrews, School of Earth and Environmental Sciences, St Andrews, United Kingdom, (3)University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Evolution of the Broadly Rifted Zone in Southern Ethiopia Through Gravitational Collapse of Dynamic Topography (137221)
Luelseged Mengesha Emishaw1, Daniel A Laó-Dávila1, Mohamed Abdelsalam2 and Estella A Atekwana3, (1)Oklahoma State University, Boone Pickens School of Geology, Stillwater, OK, United States, (2)Oklahoma State University Main Campus, Boone Pickens School of Geology, Stillwater, OK, United States, (3)Oklahoma State University Main Campus, Stillwater, OK, United States
Velocity Models of the Upper Mantle Beneath the MER, Somali Platform, and Ethiopian Highlands from Body Wave Tomography (159014)
Anant Hariharan1, Katie M Keranen2, Sisay Alemayehu3, Atalay Ayele Wondem3, Ian D Bastow4 and Zachary Eilon5, (1)Cornell University, Ithaca, NY, United States, (2)Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, (3)Addis Ababa University, Institute of Geophysics, Space Science, and Astronomy, Addis Ababa, Ethiopia, (4)Imperial College London, Department of Earth Science and Engineering, London, SW7, United Kingdom, (5)Lamont-Doherty Earth Observatory, Palisades, NY, United States
Using osmium isotopes to explore the link between alkaline lavas and metasomatized mantle in the Western Branch, Uganda (165161)
Wendy R Nelson, Towson University, Towson, MD, United States, Tanya Furman, Pennsylvania State University, Department of Geosciences, University Park, United States and Erica Pitcavage, Pennsylvania State University Main Campus, University Park, PA, United States
Geochemical Insights Into Lithospheric Melting and Instability in the Bufumbira Volcanic Field of the Western Rift, Uganda (150032)
Erica Pitcavage, Pennsylvania State University Main Campus, University Park, PA, United States, Tanya Furman, Pennsylvania State University, Department of Geosciences, University Park, United States and Wendy R Nelson, Towson University, Towson, MD, United States
Investigating Stress Interactions Between the Active Ol Doinyo Lengai Volcano and Adjacent Natron Border Fault in a Young Segment of the East African Rift System (180173)
Joshua Robert Robert Jones, Virginia Tech, Blacksburg, VA, United States and Dr. D. Sarah Stamps, PhD
Along-axis strain patterns in a magmatically active early-stage rift zone: Magadi-Natron-Manyara rifts, Africa (164630)
Roy Hadfield1,2, Alexander Weinstein2, Sarah J Oliva2, Cynthia J Ebinger3, Steven W Roecker4, James D Muirhead5, Hyunwoo Lee6 and Gladys karegi Kianji7, (1)College of Wooster, Wooster, OH, United States, (2)University of Rochester, Rochester, NY, United States, (3)Tulane University, School of Science & Engineering, New Orleans, United States, (4)Rensselaer Polytechnic Inst, Earth & Environmental Sciences, Troy, United States, (5)University of Idaho, Moscow, ID, United States, (6)University of New Mexico Main Campus, Earth and Planetary Sciences, Albuquerque, NM, United States, (7)University of Nairobi, Geology, Nairobi, Kenya
Magmatic fluid processes revealed by a joint analysis of seismic and InSAR data in an early continental rift (141445)
Christelle Wauthier1, Kirsten Stephens2, Sarah J Oliva3, Alexander Weinstein3 and Cynthia J Ebinger4, (1)Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States, (2)The Pennsylvania State University, Department of Geosciences, University Park, United States, (3)University of Rochester, Rochester, NY, United States, (4)Tulane University, School of Science & Engineering, New Orleans, United States
Volcanic activity in the early stage rifting: Melilitites and nephelinites from the Manyara Basin (North Tanzania rift-axis, East Africa) (155389)
Fleurice Parat1, Céline Baudouin1, Christel Tiberi2, Stephanie Gautier1 and Sophie Peyrat3, (1)Géosciences Montpellier, Montpellier Cedex 05, France, (2)University of Montpellier II, Montpellier Cedex 05, France, (3)Geosciences Montpellier, UMR5242, Universite Montpellier 2, Montpellier, France
Constraining Lateral Evolution of Magmatic Behavior in North Tanzania from Geophysical and Geochemical Analyses (173318)
Stephanie Gautier1, Christel Tiberi2, Fleurice Parat1 and Céline Baudouin1, (1)Géosciences Montpellier, Montpellier Cedex 05, France, (2)University of Montpellier II, Montpellier Cedex 05, France
Brittle reactivation of inherited late Neoproterozoic/Cambrian lithospheric-scale structures during extension and break-up of Madagascar from Africa (140708)
Jörg Giese1, Miriam Christina Reiss2, Elisa J. Rindraharisaona3,4, Georg Rumpker2, Guido Schreurs5, Frederik J Tilmann6 and Xiaohui Yuan7, (1)Free University of Berlin, Berlin, Germany, (2)Goethe University Frankfurt, Frankfurt, Germany, (3)Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany, (4)University of Antananarivo, Institute and Observatory of Geophysics Antananarivo, Antananarivo, Madagascar, (5)University of Bern, Bern, Switzerland, (6)Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany, (7)Deutsches GeoForschungsZemtrum GFZ, Potsdam, Germany
GPS and InSAR observations of ground deformation in the northern Malawi (Nyasa) rift from the SEGMeNT project (120667)
Matthew E Pritchard1, Julie Elliott2, William Joseph Durkin IV1, Whyjay Zheng3, Elifuraha Saria4, Daud Ntambila4, Patrick Rafiki N Chindandali5, Scott L Nooner6 and Scott T Henderson7, (1)Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, (2)Michigan State University, Earth and Environmental Sciences, East Lansing, MI, United States, (3)National Central University, Center for Space and Remote Sensing Research, Kanagawa, Japan, (4)Ardhi University, Dar Es Salaam, Tanzania, (5)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (6)University of North Carolina at Wilmington, Wilmington, NC, United States, (7)University of Washington, Earth and Space Sciences, Seattle, United States
2009 Karonga Earthquake associated with reactivation of structures within the Mugesse Shear Zone, Malawi: Evidence from aeromagnetic data (129493)
Folarin Kolawole1, Estella A Atekwana2, Mohamed Abdelsalam3, Daniel A Laó-Dávila2, Toni Ivey2, Patrick Rafiki N Chindandali4, Jalf Salima5 and Leonard Kalindekafe6, (1)Columbia University, Department of Earth & Environmental Sciences, Palisades, NY, United States, (2)Oklahoma State University Main Campus, Stillwater, OK, United States, (3)Oklahoma State University Main Campus, Boone Pickens School of Geology, Stillwater, OK, United States, (4)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (5)Geological Survey of Malawi, Zomba, Malawi, (6)Malawi University of Science and Technology, Thyolo, Malawi
Development, Interaction and Linkage of Normal Fault Segments along the 100-km Bilila-Mtakataka Fault, Malawi (124788)
Michael Hodge, Cardiff University, School of Earth and Ocean Sciences, Cardiff, CF24, United Kingdom, Ake Fagereng, Cardiff University, Cardiff, CF24, United Kingdom, Juliet Biggs, University of Bristol, School of Earth Sciences, Bristol, United Kingdom, Hassan S. Mdala, Geological Survey of Malawi, Zomba, Malawi and Katsuichiro Goda, Western University, Department of Earth Sciences, London, ON, Canada
Seismic Anisotropy of the Upper Mantle Below the Southwestern East African Rift and the Rungwe Volcanic Province (159546)
Gabrielle Tepp1,2, Cynthia J Ebinger3, Donna J Shillington4, Derek Keir5, James B Gaherty6, Andrew Nyblade7, Natalie J Accardo4, Ryan James Gallacher8, Gabriel John Mbogoni9, Patrick Rafiki N Chindandali10, Richard Ferdinand-Wambura11, Gabriel Daudi Mulibo11, Godson Kamihanda9, Christopher A Scholz12, Kate Selway13, John Paul O'Donnell14, Jalf Salima15 and Abdul H Mruma9, (1)University of Rochester, Rochester, United States, (2)U.S. Geological Survey Alaska Volcano Observatory, Anchorage, AK, United States, (3)Tulane University, School of Science & Engineering, New Orleans, United States, (4)Columbia University of New York, Palisades, NY, United States, (5)University of Southampton, Ocean and Earth Sciences, Southampton, United Kingdom, (6)Organization Not Listed, Washington, DC, United States, (7)Pennsylvania State University, Department of Geosciences, University Park, United States, (8)University of Southampton, Southampton, United Kingdom, (9)Geological Survey of Tanzania, Dodoma, Tanzania, (10)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (11)University of Dar es Salaam, Dar es Salaam, Tanzania, (12)Syracuse University, Earth and Environmental Sciences, Syracuse, NY, United States, (13)Lamont -Doherty Earth Observatory, Palisades, NY, United States, (14)Pennsylvania State University Main Campus, University Park, PA, United States, (15)Geological Survey of Malawi, Zomba, Malawi
Inferences of Complex Anisotropic Layering and Mantle Flow Beneath the Malawi Rift Zone from Shear-Wave Splitting (164185)
Cory A Reed1, Stephen S Gao1, Youqiang Yu2, Kelly Hong Liu1, Patrick Rafiki N Chindandali3, Hassan S. Mdala4, Belarmino Massinque5 and Daniel M. Mutamina2, (1)Missouri University of Science and Technology, Geology and Geophysics Program, Rolla, MO, United States, (2)Missouri University of Science and Technology, Rolla, MO, United States, (3)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (4)Geological Survey of Malawi, Zomba, Malawi, (5)Universidade Eduardo Mondlane, Department of Geology, Maputo, Mozambique
Upper mantle P- and S-wave velocity structure beneath northern Lake Malawi (Nyasa) and the Rungwe Volcanic Province, East Africa (193610)
Ashley Nichole Grijalva1, Marsella Kachingwe2, Andrew Nyblade1, Donna J Shillington3, James B Gaherty4, Cynthia J Ebinger5, Natalie J Accardo3, John Paul O'Donnell1, Gabriel John Mbogoni6, Gabriel Daudi Mulibo7, Richard Ferdinand7, Patrick Rafiki N Chindandali8 and Felix Mphepo9, (1)Pennsylvania State University Main Campus, University Park, PA, United States, (2)Penn State University, Chicago, IL, United States, (3)Columbia University of New York, Palisades, NY, United States, (4)Organization Not Listed, Washington, DC, United States, (5)Tulane University, School of Science & Engineering, New Orleans, United States, (6)Geological Survey of Tanzania, Dodoma, Tanzania, (7)University of Dar es Salaam, Dar es Salaam, Tanzania, (8)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (9)Geological Survey of Malawi, Zomba, Malawi
Constraints on the 3D Sediment and Crustal Architecture of the Weakly Extended Malawi Rift from the Onshore/Offshore Wide-Angle Refraction Experiment (174599)
Natalie J Accardo1, Donna J Shillington1, Christopher A Scholz2, Tannis McCartney3, Cynthia J Ebinger4, James B Gaherty5, Andrew Nyblade6, Arnold Eatmon7, Patrick Rafiki N Chindandali8, Godson Kamihanda9, Richard Ferdinand10, Jalf Salima11 and Abdul H Mruma9, (1)Columbia University of New York, Palisades, NY, United States, (2)Syracuse University, Earth and Environmental Sciences, Syracuse, NY, United States, (3)Syracuse University, Syracuse, NY, United States, (4)Tulane University, School of Science & Engineering, New Orleans, United States, (5)Organization Not Listed, Washington, DC, United States, (6)Pennsylvania State University, Department of Geosciences, University Park, United States, (7)Fort Valley State University, Mathematics, Fort Valley, GA, United States, (8)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (9)Geological Survey of Tanzania, Dodoma, Tanzania, (10)University of Dar es Salaam, Dar es Salaam, Tanzania, (11)Geological Survey of Malawi, Zomba, Malawi
3D Variations in Sediment Architecture in the Central Basin of Lake Malawi from the SEGMeNT Active-Source Experiment (177670)
Arnold Eatmon1, Natalie J Accardo2, Donna J Shillington2, Evans Awere Onyango3, Christopher A Scholz4, Tannis McCartney5, Cynthia J Ebinger6, James B Gaherty7, Andrew Nyblade8, Patrick Rafiki N Chindandali9, Godson Kamihanda10, Richard Ferdinand11, Jalf Salima12 and Abdul H Mruma10, (1)Fort Valley State University, Mathematics, Fort Valley, GA, United States, (2)Columbia University of New York, Palisades, NY, United States, (3)University of Houston, Houston, TX, United States, (4)Syracuse University, Earth and Environmental Sciences, Syracuse, NY, United States, (5)Syracuse University, Syracuse, NY, United States, (6)Tulane University, School of Science & Engineering, New Orleans, United States, (7)Organization Not Listed, Washington, DC, United States, (8)Pennsylvania State University, Department of Geosciences, University Park, United States, (9)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (10)Geological Survey of Tanzania, Dodoma, Tanzania, (11)University of Dar es Salaam, Dar es Salaam, Tanzania, (12)Geological Survey of Malawi, Zomba, Malawi
Active intra-basin faulting in the Northern Basin of Lake Malawi from seismic reflection data (159869)
Donna J Shillington1, Patrick Rafiki N Chindandali2, Christopher A Scholz3, Cynthia J Ebinger4, Evans Awere Onyango5, Katherine E Peterson6, James B Gaherty7, Andrew Nyblade8, Natalie J Accardo1, Tannis McCartney9, Sarah J Oliva10, Godson Kamihanda11, Richard Ferdinand12, Jalf Salima13 and Abdul H Mruma11, (1)Columbia University of New York, Palisades, NY, United States, (2)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (3)Syracuse University, Earth and Environmental Sciences, Syracuse, NY, United States, (4)Tulane University, School of Science & Engineering, New Orleans, United States, (5)University of Houston, Houston, TX, United States, (6)University of Iowa, Iowa City, IA, United States, (7)Organization Not Listed, Washington, DC, United States, (8)Pennsylvania State University, Department of Geosciences, University Park, United States, (9)Syracuse University, Syracuse, NY, United States, (10)University of Rochester, Rochester, NY, United States, (11)Geological Survey of Tanzania, Dodoma, Tanzania, (12)University of Dar es Salaam, Dar es Salaam, Tanzania, (13)Geological Survey of Malawi, Zomba, Malawi
Constraints on Faulting and Basin Architecture in the North Basin of Lake Malawi from Active-Source Seismic Data (178034)
Evans Awere Onyango1, Donna J Shillington2, Natalie J Accardo2, Christopher A Scholz3, Cynthia J Ebinger4, James B Gaherty5, Tannis McCartney6, Andrew Nyblade7, Patrick Rafiki N Chindandali8, Godson Kamihanda9, Richard Ferdinand10, Jalf Salima11 and Abdul H Mruma9, (1)University of Houston, Houston, TX, United States, (2)Columbia University of New York, Palisades, NY, United States, (3)Syracuse University, Earth and Environmental Sciences, Syracuse, NY, United States, (4)Tulane University, School of Science & Engineering, New Orleans, United States, (5)Organization Not Listed, Washington, DC, United States, (6)Syracuse University, Syracuse, NY, United States, (7)Pennsylvania State University, Department of Geosciences, University Park, United States, (8)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (9)Geological Survey of Tanzania, Dodoma, Tanzania, (10)University of Dar es Salaam, Dar es Salaam, Tanzania, (11)Geological Survey of Malawi, Zomba, Malawi
Deciphering the role of fluids in early stage rifting from full moment tensor inversion of East African earthquakes (125328)
Sarah Jaye C Oliva, University of Rochester, Earth and Environmental Sciences, Rochester, NY, United States, Cynthia J Ebinger, Tulane University, School of Science & Engineering, New Orleans, United States, Derek Keir, University of Southampton, Ocean and Earth Sciences, Southampton, United Kingdom, Donna J Shillington, Columbia University of New York, Palisades, NY, United States and Patrick Rafiki N Chindandali, Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States
Patterns of current and failed rifting in Africa from full wave long-period ambient noise tomography (178705)
Erica Emry1, Yang Shen2, Andrew Nyblade3, Ashton F Flinders4 and Xueyang Bao2, (1)New Mexico Institute of Mining and Technology, Earth and Environmental Science, Socorro, NM, United States, (2)University of Rhode Island, Narragansett, RI, United States, (3)Pennsylvania State University, Department of Geosciences, University Park, United States, (4)University of Rhode Island, Narragansett, United States
Sources of Rifting in the East African Rift System from Rayleigh Wave Tomography (160770)
Jonathan Charles Miller, Colgate University, Hamilton, NY, United States and Aubreya Nicole Adams, Colgate University, Department of Earth and Environmental Geosciences, Hamilton, United States
Seismic Imaging of the North American Mid-Continent Rift System Using S-to-P Receiver Functions (188541)
Ben Chichester, University of Southampton, Ocean and Earth Science, National Oceanography Centre Southampton, Southampton, SO14, United Kingdom, Catherine Rychert, Woods Hole Oceanographic Institution, Ocean and Earth Science, Woods Hole, MA, United States, Nicholas Harmon, University of Southampton, Ocean and Earth Science, Southampton, United Kingdom, Suzan van der Lee, Northwestern University, Evanston, IL, United States, Andrew W Frederiksen, University of Manitoba, Earth Sciences, Winnipeg, MB, Canada and Hao Zhang, Northwestern University, Earth and Planetary Sciences, Evanston, IL, United States
The Role of Magmatic and Volcanic Loads in Generating Seaward Dipping Reflector Structures on Volcanic Rifted Margins (184282)
Dr. Xiaochuan Tian, PhD, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States and W Roger Buck, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Continuous Spectrum of Crustal Structures and Spreading Processes from Volcanic Rifted Margins to Mid-Ocean Ridges (179361)
Jeffrey Karson, Syracuse University, Earth Sciences, Syracuse, NY, United States

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