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EAGLE (Ethiopia-Afar Geoscientific Lithospheric Experiment)



Detonation of 1000 kg of explosive in Arenguade crater lake, one of two dozen seismic sources used for our controlled-source profiles in Ethiopia US-EAGLE (Ethiopia-Afar Geoscientific Lithospheric Experiment) is the US component of the international EAGLE program to investigate modification of lithospheric structure during continental breakup. With US collaborators from UTEP, Penn State and SWMSU we are working with UK scientists from Leicester, London, Leeds and Edinburgh in a comprehensive investigation of the deep structure of the Main Ethiopian Rift, at the point where the archetypal narrow continental rift - the East African Rift - is becoming dominated by magmatism as it progresses towards ocean rifting in the Afar Triangle and southern Red Sea. Katie Keranen (crustal group graduate) and Ewenet Gashawbeza (crustal group graduate) are working on this project. Previously two undergraduates, Andrea Les and Michele Cash, worked on this project and assisted with fieldwork in Ethiopia. For more on the science objectives of the project, click here. In June 2004 Prof. Klemperer co-organized the NSF-funded US-Africa Workshop on Anatomy of Continental Rifts: The evolution of the East African Rift System from nascent extension to continental breakup in Addis Ababa, Ethiopia.

Publications

  • 2009   Keranen, K.M., Klemperer, S.L., Julia, J., Lawrence, J.F., and Nyblade, A.A., 2009. Low lower-crustal velocity across Ethiopia: is the Main Ethiopian Rift a narrow rift in a hot craton? Geochem. Geophys. Geosyst., 10, Q0AB01, doi:10.1029/2008GC002293, pp. 21. [Download .pdf]

  • 2008   Keranen, K, & Klemperer, S.L., 2008. Discontinuous and diachronous evolution of the Main Ethiopian Rift: implications for development of continental rifts, Earth and Planetary Science Letters, v. 265, 96-111, doi: 10.1016/j.epsl.2007.09.038. [Download .pdf]

  • 2007   Klemperer, S.L., and Cash, M.D., 2007, Temporal geochemical variation in Ethiopian Lakes Shala, Arenguade, Awasa and Beseka: possible environmental impacts from underwater and borehole detonations. J. Afr. Earth Sci., 48, 174-198. [download .pdf]

  • 2004   Abdelsalam, M.G., Atekwana, E.A., Keller, G.R., and Klemperer, S.L. The life cycle of continental rifting as a focus for US-African scientific collaboration. EOS, Trans. Am. Geophys. Un., v. 85 (47). [download .jpg]

  • 2004   Keranen, K., Klemperer, S.L., Gloaguen, R., and the EAGLE Working Group. Three-dimensional seismic imaging of a proto-ridge axis in the Main Ethiopian Rift. Geology, v. 32; p. 949-952, doi: 10.1130/G20737.1 and Data Repository item 2004155. [Download.pdf]

  • 2004   Les, A., Keranen, K.M., Klemperer, S.L., Khan, M.A., Maguire, P.K.H. Seismic ground-velocity prediction based on shot distance, shot size, and shotpoint site environment in Ethiopia (EAGLE Project). In: Proceedings of the International Conference on the East African Rift System, June 20-24 2004, Addis Ababa Ethiopia, eds. G. Yirgu, C. Ebinger, and G. Mulugeta, publ. Ethiopian Geosci. Mineral Engin. Assoc., pp. 121-125.  [Download .pdf]