Browsing by Author "Tsige, Teketay"

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    Gravity Studies of Erta-Ale Volcanic Range, Afar
    (Addis Ababa Universty, 2009-07) Tsige, Teketay; Mammo, Tilahun (PhD)
    An analysis of gravity data collected by the institute of Geological Survey of Ethiopia in conjunction with seismic wave velocity and Euler Deconvolution results to determine a preliminary crustal structure model of study area. The residual gravity anomaly indicates gravity maxima occur over magmatic segments and the gravity minima occur over the Ethiopian plateau escarpment and Danakil block which is related to low density material beneath the area. Gravity modeling using seismic wave velocity and Euler Deconvolution as a constraint indicates that the crust thins nearly 14.4Km over the study area. The presence of a thinned crust and higher density lower crust is characteristic of volcanic rifted margins. The study shows that the occurrence of geological structures, that are found the Ethiopian plateau escarpment, Erta Ale and Tat Ale volcanic range these structures are inferred from the high gradient residual gravity anomaly. In addition a significant thickness of sedimentary rock is observed in the beneath the study area.