Abstract
The western margin of northern Afar Depression constitutes various rock units of Neoproterozoic basement complex, Paleozoic to Mesozoic sedimentary successions and the Oligocene to present volcano-sedimentary sequences. As part of a reconnaissance survey for mineral resources in selected districts of Afar region, a geological and structural map of Dallol area has been produced with the help of the Landsat Thematic Mapper Plus imagery at a scale of 1:100,000 and a simplified stratigraphy is constructed for the western rift margin, Dallol area.Keywords: Geology, Stratigraphy, Western Rift Margin, Dallol, Northern Afar Depression, Ethiopia.
Highlights
The tectonically and seismically active continental rift segment in northern Ethiopia is one of the few regions in the world where one can recognize the complete evolution of ocean basin (Hagos, 2010)
Geology and Stratigraphic Succession of Western Margin of Dallol area Based on the field data and information obtained from satellite imagery, the map of Barberi et al (1972b) is modified to a great extent and produced a new geological map (Fig 4A) and
The northern end of the Danakil Depression, Dallol area, is a matured rift valley bounded and floored mainly by the late Proterozoic basement complexes, Mesozoic sedimentary successions, and Miocene – Quaternary sediments, where rift related volcanic inputs are found in very restricted areas
Summary
The tectonically and seismically active continental rift segment in northern Ethiopia is one of the few regions in the world where one can recognize the complete evolution of ocean basin (Hagos, 2010). It is the northern and matured arm of the Afar Triple Junction where the Red Sea, Gulf of Aden, and Main Ethiopian rifts are superimposed (Fig 1). The marginal areas of northern Afar Depression have been given little attention in the study of the tectonic evolution of the region. The fabric and nature of deformation of the metamorphic rocks at northern Afar is similar to the Tsaliet Group (850 Ma) and Tambien Group (800-735 Ma) rocks of Tigray region (Beyth, 1972; Teklay, 1997; Alene et al, 2006)
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