GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 117
Monday, 23 October 2017: 8:00 AM-12:00 PM
Yakima 1 (The Conference Center)

T241. Volcano-Tectonic Evolution of the East African Rift System

GSA International Interdisciplinary Interest Group; GSA Geophysics Division; GSA Sedimentary Geology Division; GSA Structural Geology and Tectonics Division; GSA Mineralogy, Geochemistry, Petrology, and Volcanology Division
Kevin L. Mickus and Cynthia J. Ebinger, Advocates
8:00 AM
CURIE DEPTH ANALYSIS OF THE AFAR REGION, ETHIOPIA
MICKUS, Kevin L., Dept. of Geosciences, Missouri State University, Springfield, MO 65897 and BRIDGES, David L., Missouri Geological Survey, Missouri Department of Natural Resources, P.O. Box 250, Rolla, MO 65401, kevinmickus@missouristate.edu
8:15 AM
MAGNETIC AND GRAVITY IMAGING OF THE LITHOSPHERIC STRUCTURE BENEATH THE DOBI GRABEN, AFAR DEPRESSION
DEMISSIE, Zelalem S.1, MICKUS, Kevin L.2, ABDELSALAM, Mohamed G.3, BRIDGES, David L.4 and ATEKWANA, Estella A.3, (1)Boone Pickens School of Geology, Oklahoma State University, Stillwater, OK 74078, (2)Dept. of Geosciences, Missouri State University, Springfield, MO 65897, (3)Boone Pickens School of Geology, Oklahoma State University, 105 Noble Research Center, Stillwater, OK 74078-3031, (4)Missouri Geological Survey, Missouri Department of Natural Resources, P.O. Box 250, Rolla, MO 65401, zelaled@okstate.edu
8:30 AM
NEW KINEMATIC CONSTRAINTS ON THE QUATERNARY TECTONIC EVOLUTION OF THE AFAR TRIPLE JUNCTION
POLUN, Sean G.1, HORRELL, David1, TESFAYE, Samson2 and GOMEZ, Francisco1, (1)Department of Geological Sciences, University of Missouri, 101 Geology Building, Columbia, MO 65211, (2)Cooperative Research Programs, Lincoln University, 104 Foster Hall, 904 Chestnut St, Jefferson City, MO 65102, sgpq58@mail.missouri.edu
8:45 AM
MAGNETOTELLURIC ANALYSIS OF THE OLKARIA AND EBURRU GEOTHERMAL FIELDS -KENYAN RIFT, EAST AFRICAN RIFT SYSTEM
MWANGI, Anna, Geological Sciences, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, MICKUS, Kevin L., Dept. of Geosciences, Missouri State University, Springfield, MO 65897 and SERPA, Laura, Geological Sciences, University of Texas at El Paso, 500 W University, El Paso, TX 79968, awmwangi@miners.utep.edu
9:00 AM
TITLE: VOLCANISM, TECTONIC UPLIFT AND DRAINAGE INCISION OF THE KENYA RIFT, EAST AFRICAN RIFT SYSTEM: MORPHO-TECTONIC ANALYSIS APPROACH
XUE, Liang, Boone Pickens School of Geology, Oklahoma State University, Noble Research Center, Stillwater, OK 74075, xlia@okstate.edu
9:15 AM
SENTINEL-1 INSAR OBSERVATIONS OF GROUND DEFORMATION IN THE EARLY-STAGE NORTHERN NYASA RIFT
HENDERSON, S.T.1, PRITCHARD, M.E.2, ZHENG, W.2, OLIVA, S.J.3, EBINGER, C.J.4, ELLIOTT, J.5, SARIA, E.6, NTAMBILA, D.6 and CHINDANDALI, P.R.N.7, (1)Earth and Space Sciences, University of Washington, Johnson Hall, Seattle, WA 98195, (2)Cornell University, Ithaca, NY 14850, (3)Tulane University, New Orleans, LA 70118, (4)Earth and Environmental Sciences, Tulane University, Blessey Hall, New Orleans, LA 70118, (5)Earth, Atmospheric, and Planetary Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, (6)Ardhi University, Dar es Salaam, Tanzania, United Republic of, (7)Geological Survey of Malawi, Zomba, 7173, Malawi, scottyh@uw.edu
 
9:30 AM
Break
9:45 AM
LOWER CRUSTAL EARTHQUAKES IN MAGMATIC AND AMAGMATIC RIFT SECTORS, EAST AFRICA
EBINGER, C.J.1, OLIVA, S.J.2, DROOFF, Connor3, KEIR, Derek4, LAVAYSSIERE, Aude4, WEINSTEIN, Alexander1, SHILLINGTON, Donna J.5 and GAHERTY, James B.5, (1)Earth and Environmental Sciences, Tulane University, Blessey Hall, New Orleans, LA 70118, (2)Tulane University, New Orleans, LA 70118, (3)Earth and Environmental Sciences, University of Rochester, Rochester, NY 14627, (4)Ocean and Earth Science, University of Southampton, European Way, Southampton, SO14 3ZH, United Kingdom, (5)Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, NY 10964, cebinger@tulane.edu
10:00 AM
PRE-EXISTING LITHOSPHERIC SCALE STRUCTURES FACILITATE OBLIQUE RIFTING: EVIDENCE FROM THE RUKWA-MALAWI SEGMENT OF THE EAST AFRICAN RIFT SYSTEM
HEILMAN, Erin K.1, KOLAWOLE, Folarin2, MAYLE, Micah2, ATEKWANA, Estella A.3 and ABDELSALAM, Mohamed G.3, (1)Geology, Oklahoma State University, Noble Research Center, Stillwater, OK 74077, (2)Boone Pickens School of Geology, Oklahoma State University, 105 Noble Research Center, Oklahoma State University, Stillwater, OK 74078-3031, (3)Boone Pickens School of Geology, Oklahoma State University, 105 Noble Research Center, Stillwater, OK 74078-3031, erin.heilman@okstate.edu
10:15 AM
PERSPECTIVES ON THE EFFECT OF PRE-EXISTING WEAKNESSES IN THE MALAWI RIFT, EAST AFRICA
FAGERENG, Ake1, HODGE, Michael S.1, BIGGS, Juliet2, HUANG, Leslie3, HELLEBREKERS, Nina4, MDALA, Hassan5, DIENER, Johann F.A.3 and NIEMEIJER, André R.4, (1)School of Earth and Ocean Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom, (2)School of Earth Sciences, University of Bristol, Bristol, BS8 IRJ, United Kingdom, (3)Department of Geological Sciences, University of Cape Town, Upper Campus, Rondebosch, 7701, South Africa, (4)Department of Earth Sciences, Utrecht University, Utrecht, 3584CD, Netherlands, (5)Geological Survey Department of Malawi, Zomba, Malawi, fagerenga@cardiff.ac.uk
10:30 AM
CRUSTAL AND MANTLE STRUCTURE AND ANISOTROPY BENEATH THE YOUNG AND INCIPIENT SEGMENTS OF THE EAST AFRICAN RIFT SYSTEM (Invited Presentation)
GAO, Stephen S.1, LIU, Kelly H.2, YU, Youqiang3, REED, Cory A.1, MICKUS, Kevin L.4 and MOIDAKI, Moikwathai5, (1)Geology and Geophysics Program, Missouri University of Science and Technology, Rolla, MO 65409, (2)Geosciences and Geological and Petroleum Engineering, Missouri University of Science & Technology, 129 McNutt Hall, 1400 North Bishop Avenue, Rolla, MO 65409, (3)State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China, (4)Department of Geography, Geology, and Planning, Missouri State University, 901 S. National Avenue, Springfield, MO 65897, (5)Physics, University of Botswana, Gaborone, Botswana, sgao@mst.edu
10:45 AM
THE ROLE OF CRUSTAL STRENGTH ANISOTROPIES IN STRAIN LOCALIZATION DURING INCIPIENT CONTINENTAL RIFTING: AN EXAMPLE FROM THE OKAVANGO RIFT ZONE, BOTSWANA
HOGAN, John P., Geosciences and Geological and Petroleum Engineering, Missouri University of Science and Technology, 129 McNutt Hall, 1400 N Bishop Ave, Rolla, MO 65409 and ALVAREZ NARANJO, Angelica, Geosciences, Geological and Petroleum Engineering, Missouri University of Science and Technology, 129 McNutt Hall 1400 N Bishop Avenue, Rolla, MO 65409, jhogan@mst.edu
11:00 AM
THE TRI-TECTONIC DANCE OF SOUTH-CENTRAL AFRICA: CRATONS, OROGENIC BELTS, AND CONTINENTAL RIFT SYSTEMS
ABDELSALAM, Mohamed G.1, ATEKWANA, Estella A.1, EVANS, Rob L.2 and MICKUS, Kevin L.3, (1)Boone Pickens School of Geology, Oklahoma State University, 105 Noble Research Center, Stillwater, OK 74078-3031, (2)Geology and Geophysics, Woods Hole Oceanographic Institution, Clark South 172, MS 24, Woods Hole, MA 02543, (3)Dept. of Geosciences, Missouri State University, Springfield, MO 65897, mohamed.abdel_salam@okstate.edu
11:15 AM
THE MANTLE TRANSITION ZONE BENEATH THE EAST AFRICAN RIFT SYSTEM: FROM AFAR TO OKAVANGO
LIU, Kelly H.1, REED, Cory A.2, YU, Youqiang3, SUN, Muchen2 and GAO, Stephen S.2, (1)Geosciences and Geological and Petroleum Engineering, Missouri University of Science & Technology, 129 McNutt Hall, 1400 North Bishop Avenue, Rolla, MO 65409, (2)Geology and Geophysics Program, Missouri University of Science and Technology, Rolla, MO 65409, (3)State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China, liukh@mst.edu
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