Petrography and geochemistry of basaltic and rhyodacitic rocks from Lake Tana and the Gimjabet-Kosober areas (North Central Ethiopia)

Journal of African Earth Sciences

Volumn 26, Issue 1, 1998, Pages 119-134

  Abate, Begosew ^a   Koeberl, Christian ^a   Buchanan, Paul C ^a   Körner, Wilfried ^a  

^a UNIVERSITY OF VIENNA   (Austria)

Author keywords

[No Author keywords available]

Indexed keywords

BASALT; GEOCHEMISTRY; PETROGRAPHY; RHYODACITE;

ETHIOPIA;

EID: 0031862973     PISSN: 08995362     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0899-5362(97)00140-1     Document Type: Article

References (31)

1. Barberi, F., Civetta, L. and Varet, J. 1980. Sr isotopic composition of Afar volcanics and its implication for mantle evolution. Earth Planetary Science Letters 50, 247-259.
2. Barberi, F., Ferrar, G., Santacroce, M., Treuil, M. and Varet, J. 1975. A transitional basalt-pantellerite sequence of fractional crystallization, the Boina Center (Afar Rift, Ethiopia). Journal Petrology 16, 22-56.
3. Barberi, M., Calderoni, G., Delitala, M. C., Garbarino, C., Masi, U. and Petrucciani, C. 1995. Geochemistry of volcanic basic rocks from Bale Mountains (Southeastern Ethiopia): Evidence of crustal contamination. Chemie Erde 55, 205-216
4. Barrat, J. A., Jahn, B. M., Joron, J. L., Auvray, B. and Hamdi, H. 1990. Mantle heterogeneity in northeastern Africa: evidence from Nd isotopic compositions and hygromagmatophile element geochemistry of basaltic rocks from the Gulf of Tadjoura and southern Red Sea regions. Earth Planetary Science Letters 101, 233-247.
5. Bellieni, G., Justin-Visentin, E., Zanettin, B., Piccirillo, E. M., Radicati di Brozolo, F. and Rita, F. 1981. Oligocene transitional tholeiitic magmatism in Northern Turkana (Kenya): comparison with coeval Ethiopian volcanism. Bulletin Volcanologique 44, 411-427.
6. Berhe, S. M., Desta, B., Nicoletti, M. and Teferra, M. 1987. Geology, geochronology and geodynamic implications of the Cenozoic magmatic province in W and SE Ethiopia. Journal Geological Society, London 144, 231-226.
7. Burke, K. and Wilson, J. T. 1972. Is the African Plate stationary? Nature 239, 387-390.
8. Cox, K. G. 1980. A model for flood basalt volcanism. Journal Petrology 21, 629-650.
9. Cox, K. G., Bell, J. D. and Pankhurst, R. J. 1979. The interpretation of igneous rocks. 450p. Allen and Unwin, London.
10. Hart, W. K., Woldegabriel, G., Walter, R. C. and Mertzman, S. T. 1989. Basaltic Volcanism in Ethiopia: Constraints on Continental Rifting and Mantle Interactions. Journal Geophysical Research 94, 7731-7748.
11. Irvine, T. N. and Baragar, W. R. A. 1971. A guide to the chemical classification of the common volcanic rocks.Canadian Journal Earth Science 8, 523-548.
12. Kazmin, V. 1972. The Geology of Ethiopia: Explanatory note to the geological map of Ethiopia. pp82-104. Ministry of Mines, Geological Survey of Ethiopia, Addis Ababa.
13. King, B. C. and Chapman, G. R. 1972. Volcanism of the Kenya Rift Valley. Philosophical Transactions Royal Society London A271, 185-208.
14. Koeberl, C. 1993. Instrumental neutron activation analysis of geochemical and cosmochemical samples: A fast and reliable method for small sample analysis. Journal Radiochemical Nuclear Chemistry 168, 47-60.
15. Koeberl, C., Reimold, W. U., Kracher, A., Träxler, B., Vormaier, A. and Körner, W. 1996. Mineralogical, petrological, and geochemical studies of drill core samples from the Manson impact structure, Iowa. In: The Manson Impact Structure, Iowa: Anatomy of an Impact Crater (Edited by Koeberl, C. and Anderson, R. R.) Geological Society America, Special Paper 302, 145-219.
16. Le Bas, M. J., Le Maitre, R. W., Streckeisen, A. and Zanettin, B. 1986. A chemical classification of volcanic rocks based on the total alkali-silica diagram. Journal Petrology 27, 745-750.
17. McDonough, W. F. and Sun, S.-S. 1995. The composition of the Earth. Chemical Geology 120, 223-253.
18. Meschede M. 1986. A method of discriminating between different types of mid-ocean ridge basalts and continental tholeiites with the Nb-Zr-Y diagram. Chemical Geology 56, 207-218.
19. Middlemost, E. A. K. 1989. Iron oxidation ratios, norms and the classification of volcanic rocks. Chemical Geology 77, 19-26.
20. Mohr, P. A. 1971 The Geology of Ethiopia. 253p. Haileslassie I University, Addis Ababa.
21. Nockolds, S. R. and Allen, R. 1954. Geochemistry of some igneous rock series, II. Geochimica Cosmochimica Acta 5, 245-285.
22. Pearce, J. A. and Cann, J. R. 1973. Tectonic setting of basic volcanic rocks determined using trace element analysis. Earth Planetary Science Letters 19, 290-300.
23. Schilling, J.-G., Kingsley, R. H., Hanan, B. B. and McCully, B. L. 1992. Nd-Sr-Pb isotopic variations along the Gulf of Aden: evidence for Afar mantle plume-continental lithosphere interaction. Journal Geophysical Research 97, 10927-10966.
24. Stewart, K. and Rogers, N. 1996. Mantle plume and lithosphere contributions to basalts from southern Ethiopia. Earth Planetary Science Letters 139, 195-211.
25. Taylor, S. R. and McLennan, S. M. 1985. The continental crust: Its Composition and Evolution. 312p. Blackwell, Oxford.
26. Thompson, R. N., Morrison, M. A., Hendry, G. L. and Parry, S. J. 1984. An assessment of the relative roles of a crust and mantle in magma genesis: an elemental approach. Philosophical Transactions Royal Society London A310, 549-590.
27. Wilson, M. 1989. Igneous Petrogenesis. 466p. Unwin Hyman, London.
28. Winchester, J. A. and Floyd, P. A. 1977. Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chemical Geology 20, 325-343.
29. Wolde, B. 1996. Spatial and temporal variations in the compositions of Upper Miocene to Recent basic lavas in the northern main Ethiopian rift: Implications for the causes of Cenozoic magmatism in Ethiopia. Geologische Rundschau 85, 380-389.
30. Geological Map of Ethiopia and Somalia; 1:2 000 000. 1979. Compiled by Merla, G., Abbate, E., Azzaroli, A., Bruni, P., Canuti, P., Fazzuoli, M., Sagri, M. and Tacconi, P. Department of Geology, University of Florence, Italy.
31. Geological Map of Ethiopia; 1:2 000 000. 1990. Compiled by Tefera, M., Tadiwos, C. and Workneh, H. Regional Geological Mapping Dept., EIGS, Addis Ababa.