Afar

The Afar region is a vast desert covering lowlands in 3 countries of Eastern Africa (Ethiopia, Eritrea, Djibouti). It is the only place in the world where an active oceanic ridge enters a continent and is visibly emerged. With more than 10 years of detailed geological activity and cartography in this arid zone, Géo2D has unique knowledge of the Afar region that can contribute richly to other development areas (such as geothermal energy, mineral resources, groundwater, policy formulation, community projects, etc ).."Geology of Afar" is the title of a book that was published in december 2017  by Springer (336pgs.),this book is a summary of all the studies carried out in the past years as well as the outcome of it.Geo2D  treasures this book in terms of expertise for development (geothermal, mineral resources, groundwater ...), both in the service the government (Regional State Afar, Ministry of Energy and Natural Resources of Djibouti ...)Géo2D collaborates with both private(ICEIDA,BRGM,AFD) and local (AGAPI in Ethiopia and ODDEG in Djibouti) companies.Géo2D collaborates with both private(ICEIDA,BRGM,AFD) and local (AGAPI in Ethiopia and ODDEG in Djibouti) companies."

  • Publications
    • Varet, J. (2018) Geology of Afar (East Africa) Ed. Springer. 1st ed., 336 p. illus.

      http://www.springer.com/in/book/9783319608631

    • Nebro, A., Gardo, I.A., Varet, J. & Onyango, S. (2016) Community-based geothermal development perspective in Afar: a new player Afar Geothermal Development Company (AGAPI) Proceedings, 6th African Rift Geothermal Conference, Addis Ababa, Ethiopia, 2nd –4thNovember 2016
    • Omenda, P., Ebinger, C., Nelson, W., Delvaux, D., Cumming, W., Marini, L., Halldórsson, S., Varet, J., Árnason, K., Ruempker, G., Alexander1, K., Zemedkum, M.(2006) Characteristics and important Factors that influence the Development of Geothermal Systems in the western branch of the East African Rift System.  Proceedings, 6th African Rift Geothermal Conference, Addis Ababa, Ethiopia, 2nd –4th November 2016
    • Mariita, N., Onyango, S. & J. Varet, J. (2016) Potential for Small Scale Direct Applications of Geothermal Fluids in Kenya’s Rift Valley – An Update from GeoPower Africa Project Proceedings, 6th African Rift Geothermal Conference, Addis Ababa, Ethiopia, 2nd –4th November 2016
  • Varet, J., Chernet, T. Woldetinsae G. Arnason, K. (2012): Exploring for Geothermal Sites in Northern and Central Afar (Ethiopia) Proceedings of the 4th African Rift Geothermal Conference . Nairobi, Kenya, 21-23 November 2012, 7p.
  • Varet, J. (2013): The Afar system and carbonates. Cocarde workshop (abstract), Sicily, p.48-49.
  • Varet J. (2010) - Contribution to favorable geothermal site selection in the Afar triangle, Argeo Meeting, Djibouti, 17p.
  • Varet J. (2006) - The Afar triangle: a future "gulf region" for world geothermal energy? - In , ARGeo-C1 - First East African Rift Geothermal conference - Geothermal energy: an indigenous environmentally benign & renewable energy resource - Addis Abeba - Ethiopia - 24/11-02/12/2006.
  • Varet J. & Richard O. (1979) - Study of the transition from deep oceanic to emerged rift zone : gulf of Tadjoura (Republic of Djibouti). Colloque Afar Rift, Rome.
  • Varet J., Demange J. & Stieltjes L. (1979) - L’éruption d’Asal en novembre 1978. Etude pétrologique et considérations pétrogénétiques. Hawaii symposium, IAVCEI (abstract).
  • Varet J., Delattre J.N., Gerard A. & Mennechet C. (1979) - Etude des variations du chanp de pesanteur entre 1973 et 1979 dans la région de L’Ardoukoba (République de Djibouti).
  • Barberi F. Civetta L. & Varet J. (1979) - Sr isotopic composition of Afar volcanics and its implication to mantle evolution. Earth Planetary Sc. Lett.
  • Bizouard H. Barberi F. & Varet J. (1979) - The magmatic expression of the Afar spreading axis: mineralogy and petrology of Erta Ale and Boina series. Earth Planetary Sc. Lett.
  • Varet J. & Barberi F. (1978) - The Afar rift junction. In Neunan and Rarnherg (eds) Petrology and geochemistry of continental rifts, p. 55-69.
  • Varet J. & Gasse F. (1978) - Geology of central and meridional Afar. Ed. CNRS, 140 p.
  • Barberi F. & Varet J. (1977) - Volcanism of Afar: small scale plate tectonics implication. Bull. Géo. Soc. Amer., v. 88, p. 1251-1266.
  • Bizouard H., Barberi F., Varet J. (1976) - Minéralogie des séries volcaniques axiales de l’Afar / précisions sur les processus et les conditions de fractionnement des magmas basaltiques dans les zones d’accrétion.
  • Lepine J.C., Richard O., Ruegg J.C., Treuil M. and Varet J. (1976) - Mise en évidence d’une zone de faille transformante reliant la vallée axiale de la dorsale de Tadjoura à celle de Goubbet-Asal (T.F.A.I.). C.R. Acad. Sci. Paris.
  • Stieltjes L., Joron J.L., Treuil M., Varet J. (1976) - Le rift d’Asal, segment de dorsale émergé discussion pétrologique et géochimique. Bull. Soc. Geol. France, 18, 4, p. 851-862.
  • Varet J. (1976) - Introduction : accrétion de nouvelle croûte en domaine suhaérien exemple de l’Afar. Bull. Soc. Géol. France, 18, 4, p. 825-828.
  • Varet J., Barberi F. (1976) - Traçé des frontières de plaques en Afar : discussion à partir des données volcanologiques. Bull. Soc. Géol. France, 18, 4, p. 831-846
  • Varet J. (1975) - L’Afar, un “point chaud” de la géophysique. La Recherche, 62, p. 1018-1026.
  • Varet J., Barberi F. (1975) - Nature of the Afar crust: a discussion. In: A. PILGER, A. ROSLER (edit.), Afar depression of Ethiopia. Stuttgart (Schweizerbart), p. 375-378.
  • Barberi F., Ferrara G., Santacroce R., Varet J. (1975) - Structural evolution of the Afar triple junction. In: A. Pilger, A. Rösler (edit.), Afar Depression of Ethiopia, Stuttgart (Schweizerbart), p. 38-54
  • Barberi F., Santacroce R. & Varet J. (1974) - Peralkaline silicic volcanic rocks of the Afar Depression. BuII. Volcan., 38, p. 755-790.
  • Barberi F., Santacroce R., Ferrara G. & Varet J. (1974) - Evolution of Afar in light of K/Ar age determinations. Afar Symposium, Bad Bergzabern, April 1-6 (abstract).
  • Tapponnier P., Varet J. (1974) - La zone de Mak’aeeasou en Afar : un équivalent émergé des « failles transformantes » océaniques. C.R. Acad. Sci., (D) 278, p. 317-329.
  • Barberi F., Ferrara G., Santacroce R. & Varet J. (1975) - Structural evolution of the Afar triple junction. In: Pilger A. & Rösler A. (edit.), Afar Depression of Ethiopia, Stuttgart (Schweizerbart), p. 38-54.
  • Barberi F. & Varet J. (1975) - Recent volcanic units of Afar and their structural significance. In: Pilger A. & Rösler A. (edit.), Afar Depression of Ethiopia, Stuttgart (Schweizerbart), p. 174-178.
  • Barberi F., Ferrara G., Santacroce R., Treuil M. et Varet J. (1975) - A transitional basalt-pantellerite sequence of fractional cristallization, the Boina Centre (Afar Rift, Ethiopia). Journal of Petrology, 16, p. 22-56.
  • Varet J. (1975) - Carte géologique de l’Afar central et méridional, CNR-CNRS, 1/500 000 Géotechnip.
  • Courtillot V., Tapponnier P. and Varet J. (1974) - Evolution of the surface expression of transform faults. Tectonophysics, 24, p. 317-329.
  • Barberi F. & Varet J. (1974) - Afar recent volcanic units and their structural significance. Afar Symposium, Bad Bergzabern, April 1-6 (abstract).
  • Barberi F., Bonatti E., Marinelli G. & Varet J. (1974) - Transverse tectonics during the split of a continent data from the Afar Rift. Tectonophysics, 23, p. 17-29.
  • Barberi F., Borsi S., Ferrara G., Mazinelli G., Santacroce R., Tazieff H. & Varet J. (1973) - Evolution of the Danakil Depression (Afar, Ethiopia) in light of radiometric age determinations a reply. J. Geol., 81, p. 749-751.
  • Varet J. (1973) - Critères pétrologiques, géochimiques et structuraux de la genèse et de la différentiation des magmas basaltiques : exemple de l’Afar. Thèse Doctorat d’État, univ. Paris-sud, 491 p.
  • CNRS-CNR Afar Team y c. Varet J. (1973) - Geology of Northern Afar (Ethopia). Rev. Geogr. Phys. Geol. Dyn., (2) 15, p. 443-490
  • de Fino M., La Volpe L., Lirer L. Varet J. (1973) - Geology and petrology of Manda-Inakir range and Moussa Alli volcano, central eastern Afar (Ethiopia and T.F.A.I.). Rev. Geog. Phys. Géol. Dyn., (2) 15, p. 373-386.
  • Marinelli G. Varet J. (1973) - Structure et évolution du Sud du ”horst Danakil” (TFAI et Ethiopie). C.R. Acad. Sci., (D) 276, p. 1119-1122.
  • Treuil M., Varet J. (1973) - Critères volcanologiques, pétrologiques et géochimiques de la genèse et de la différenciation des magmas basaltiques exemple de l‘Afar. Bull. Soc. Géol. France, (7) 15, p. 506-540.
  • Tazieff H., Barberi F., Giglia G., Varet J. (1972) - Tectonic significance of the Afar (or Danakil) depression. Nature, 235, p. 144-147.
  • Barberi F., Tazieff H. & Varet J. (1972) - Volcanism in the Afar Depression its tectonic and magmatic significance. Tectonophysics, 15, p. 19-29.
  • Black R. et Morton W.H., Varet J. (1972) - New data on Afar tectonics. Nature Phys. Science, vol. 240, p. 170-173.
  • Barberi F., Bizouard H. and Varet J. (1971) - Nature of the clinopyroxenes and iron enrichrnent in alkalic and transitional basaltic magmas. Contr. Mineral. Petrol., 33, p. 93-107.
  • Delibrias C., Faure H., Gasse F., Marinelli G., Varet J. (1971) - Le lac Afrera à l’Holocène (Afar, Ethiopie). Comm. VII° Cong. Panafricain Préhit. Et. Quat. Addis Abeba.
  • Barberi F., Giglia G., Marrinelia G., Santacroce R. et Tazieff H., Varet J. (1971) - Carte géologique du Nord de l’Afar, CNRS-CNR à 1/500 000e. Géotechnip. La Celle-Saint-Cloud.
  • Treuil M., Billhot M. Barberi F. & Varet J., (1971) - Distribution of Nickel, Copper and Zinc in the volcanic chain of Erta ‘Ale, Ethiopia. Contr. Mineral Petrol., t. 30, p. 84-94.
  • Barberi F. & Varet, J. (1972) - Carte volcanologique et pétrologique de la chaine de l'Erta'Ale (Afar, Ethiopie) au 1/100.000 Géotechnip, La Celle-Saint-Cloud.
  • Barberi F. & Varet J. (1970) - The Erta Ale volcanic range (Danakil Depression, Northern Afar, Ethiopia). Bull. Volcan., 34, p. 848-917.
  • Barberi F., Borsi S., Ferrara G. et Marinelli G., Varet J. (1970) - Relationships between tectonics and magmatology of the Northern Afar (or Danakil) depression. Symp. Royal. Society, March, 1969, Philos. Trans. Royal Soc. London. A. 267, p.293-311.
  • Tazieff, H. & Varet, J. (1969} - Pétrographie et tectonique de l'Afar septentrional (Ethiopie). Colloque Géol. Africaine Clermont-Ferrand (résumé), Ann. Fac. Sc. Clermont, n° 41, p. 54.
  • Varet J., Tazieff H. (1969) - Signification tectonique et magmatique de l’Afar septentrional (Ethiopie). Rev. Géog. phys. Geol. Dyn., (2) 11, p. 429-450.
  • Tazieff H., Marinelli G. et Barberi F., Varet J. (1969) - Géologie de l’Afar septentrional Symposium Ass. Interna. Volcanologie ; Canaries. Bull. Volc., t. XXXIII-4, p. 1039-1072.
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