Advertisement

Bulletin Volcanologique

, Volume 33, Issue 2, pp 549–565 | Cite as

An excursion to the Bayuda volcanic field of Northern Sudan

  • D. C. Almond
  • Farouk Ahmed
  • Badr Eldin Khalil
Article

Abstract

A cluster of well-preserved recent volcanoes in the northern Bayuda Desert make up a more or less continuous field some 520 km2 in area surrounded by a number of isolated centres of eruption. The volcanoes are numerous but small; up to 400 m in height and 0.35 km2 in volume. Most of them are simple composite volcanoes with a pyroclastic cone skirted by a small lava field erupted from the same vent after explosive eruptions had ceased. In a few instances, however, the cone was eviscerated by more violent eruptions, leaving a deep explosion crater. The lavas are all nepheline-normative alkali basalts and contain a variety of xenocrysts and xenoliths from at least three different sources. The distribution of the recent volcanoes was partly controlled by large granitic ring-intrusions of the Basement Complex country rocks. These intrusions belong to the Younger Granite association of late Precambrian or Lower Palaeozoic age and represent a volcanic-intrusive episode widespread in northern Africa. The complexes are composed of cale-alkaline and peralkaline granites and syenites and a related plexus of dyke swarms.

Keywords

Volcanic Rock Tephra Sudan Pyroclastic Rock Volcanic Field 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Almond, D. C., 1967a, Discovery of a tin-tungsten mineralization in northern Khartoum Privince, Sundan. Geol. Mag.,104, 1–12.CrossRefGoogle Scholar
  2. —————, 1967b, Petrology of the basalt at Jebel Et Toriya, near Khartoum. Sudan Notes and Records,48, 141–150.Google Scholar
  3. -----, 1968,Post-Nubian volcanicity in the Sudan, (In abstract) Proc. geol. Soc. Lond., No. 1644, 266–267.Google Scholar
  4. Andrew, G., 1948,Geology of the Sudan. In Tothill (Ed.),Agriculture in the Sudan, London.Google Scholar
  5. Black, R., andGirod, M., 1967,Controle structurale du volcanisme ancien et récent dans les régions du Hoggar, Air, Nigéria et Cameroun. (In abstract), Fourth Symposium of African Geology, Sheffield, 1967.Google Scholar
  6. Delany, F. M., 1954,Recen contributions to the geology of the Anglo-Egyptian Sudan. Int. Geol. Cong., 19th., Algeria, C. R. XX, Assoc. Serv. Geol. Africaines, pt. 1, 11–18.Google Scholar
  7. Fries, C., Jr., 1953,Volumes and weights of pyroclastic material, lava, and water erupted by Paricutin volcano, Michoacan, Mexico. Trans. Amer. Geophys. Union.,34, 603–616.Google Scholar
  8. Grabham, G. W., 1920,The Bayuda volcanic fields. Sudan Notes and Records,8, 133–136.Google Scholar
  9. Gregory, J. W., 1920,The « Times » Africa flight. Discovery of a new volcanic field. Nature,104, 667–668.Google Scholar
  10. Kabesh, M. L., 1960,Mica deposits of northern Sudan. Bull. geol. Surv. Sudan, 7.Google Scholar
  11. Mohr, P., 1961,The geology, structure and origin of the Bishoftu explosion craters. Bull. Geophys. Observ. Addis Ababa,2, 65–101.Google Scholar
  12. Said, R., 1962,Geology of Egypt, Amsterdam, New York and London: Elsevier.Google Scholar
  13. Sandford, K. S., 1935,Geological observations on the north-west frontier of the Anglo-Egyptian Sudan and the adjoining part of the southern Libyan Desert. Quart. J. geol. Soc. Lond.,41, 323–381.Google Scholar
  14. Whiteman, A. J. (in press),Geology of Sudan Republic.Google Scholar

Copyright information

© Stabilimento Tipografico Francesco Giannini & Figli 1969

Authors and Affiliations

  • D. C. Almond
    • 1
  • Farouk Ahmed
  • Badr Eldin Khalil
  1. 1.Department of Geology and GeographyKingston College of TechnologyKingston-upon-ThamesEngland

Personalised recommendations