Abstract
The barren deserts of the Afar Triangle constitute a basaltic ocean-floor terrain on a divergent plate boundary that is above sea level because it lies over a hot spot. Grabens and rift valleys including the Danakil Depression exhibit active normal faulting. Active dyke emplacement is indicated by heat loss from the Erta Ale lava lake. Both these processes accommodate the crustal extension, and excess magma input creates scattered volcanic eruptions.
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Notes
- 1.
ka stands for 1,000 years
References
Abdallah A, Courtillot V, Kasser M, le Dain A, Lépine JC, Robineau B, Ruegg JC, Tapponnier P, Tarantola A (1979) Relevance of Afar seismicity and volcanism to the mechanics of accreting plate boundaries. Nature 282:17–23
Acton GD, Tessama A, Jackson M, Bilham R (2000) The tectonic and geomagnetic significance of paleomagnetic observations from volcanic rocks from central Afar, Africa. Earth Planet Sci Lett 180:225–241
Amelung F, Oppenheimer C, Segall P, Zebker H (2000) Ground deformation near Gada Ale volcano, Afar, observed by radar interferometry. Geophys Res Lett 27:3093–3096
Barberi F, Varet J (1970) The Erte Ale volcanic range. Bull Volcanol 34:848–917
Doubre C, Peltzer G (2007) Fluid-controlled faulting process in the Asal Rift, Djibouti, from 8-year radar interferometry observations. Geology 35:69–72
Oppenheimer C, Francis P (1998) Implications of longeval lava lakes for geomorphological and plutonic processes at Erte Ale volcano, Afar. J Volcanol Geotherm Res 80:101–111
Ruegg JC, Lépine JC, Tarantola A, Kasser M (1979) Geodetic measurements of rifting associated with a seismovolcanic crisis in Afar. Geophys Res Lett 6:817–820
Tapponier P, Armijo R, Manighetti I, Coutrillot V (1990) Bookshelf faulting and horizontal block rotations between overlapping rifts in southern Afar. Geophys Res Lett 17:1–4
Vigny C, de Chabalier J, Ruegg JC, Huchon P, Feig KL, Cattin R, Asfaw L, Kanbari K (2007) 25 years of geodetic measurements along the Tadjoura-Asal rift system, Djibouti, East Africa. J Geophys Res 112:B06410. doi:10.1029/2004JB003230
Waltham T (2005) Extension tectonics in the Afar Triangle. Geol Today 21:101–107
Wright TJ, Ebinger CJ, Biggs J, Ayele A, Yirgu G, Keer D, Stork A (2006) Magma-maintained rift segmentation at continental rupture in the 2005 Afar dyking episode. Nature 442:291–294
Yirgu G, Ebinger CJ, Maguire PKH (eds) (2006) The Afar Volcanic Province within the East African Rift System. Geol Soc Lond Spec Publ 259
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Waltham, T. (2009). Afar Triangle: Rift Valleys and Volcanoes over Plate Divergence. In: Migon, P. (eds) Geomorphological Landscapes of the World. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3055-9_19
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DOI: https://doi.org/10.1007/978-90-481-3055-9_19
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