Crustal contribution to the genesis of Ethiopian plateau rhyolitic ignimbrites: Basalt and rhyolite geochemical provinciality

Journal of the Geological Society

Volumn 160, Issue 1, 2003, Pages 47-56

  Ayalew, Dereje ^a   Yirgu, Gezahegn ^a  

^a ADDIS ABABA UNIVERSITY   (Ethiopia)

Author keywords

Assimilation; Ethiopian volcanic province; Fractional crystallization; Oligocene; Petrogenesis; Rhyolites

Indexed keywords

CRUSTAL CONTAMINATION; FLOOD BASALT; FRACTIONAL CRYSTALLIZATION; IGNIMBRITE; OLIGOCENE; PETROGENESIS; RHYOLITE;

ETHIOPIA; YEMEN;

EID: 0037253550     PISSN: 00167649     EISSN: None     Source Type: Journal    
DOI: 10.1144/0016-764901-169     Document Type: Article

References (44)

1. AYALEW, D., BARBEY, P., MARTY, B., REISBERG, L., YIRGU, G. & PIK, R. 2002. Source, genesis and timing of giant ignimbrite deposits associated with Ethiopian continental flood basalts. Geochimica et Cosmochimica Acta, 66, 1429-1448.
2. AYALEW, T., BELL, K., MOORE, K. & PARRISH, R. 1990. U-Pb and Rb-Sr geochronology of the western Ethiopian shield. Geological Society of America Bulletin, 102, 1309-1316.
3. BAKER, J., MACPHERSON, C., MENZIES, M., THIRLWALL, M., AL-KADASI, M. & MATTEY, D. 2000. Resolving crustal and mantle contributions to continental flood volcanism, Yemen: constraints from mineral oxygen isotope data. Journal of Petrology, 41, 1805-1820.
4. BAKER, J., SNEE, L. & MENZIES, M. 1996a. A brief Oligocene period of flood volcanism in Yemen: implications for the duration and rate of continental flood volcanism at the Afro-Arabian triple junction. Earth and Planetary Science Letters, 138, 39-55.
5. BAKER, J., THIRLWALL, M. & MENZIES, M. 1996b. Sr-Nd-Pb isotopic and trace element evidence for crustal contamination of plume-derived flood basalts: Oligocene flood volcanism in western Yemen. Geochimica et Cosmochimica Acta, 60, 2559-2581.
6. BELLIENI, G. & COMIN-CHIARAMONTI, P. et al. 1986. Petrogenetic aspects of acid and basaltic lavas from the Parana plateu (Brazil): geological, mineralogical and petrochemical relationships. Journal of Petrology, 27, 915-944.
7. BETTON, P.J. 1979. Isotopic evidence for crustal contamination in the Karoo rhyolites of Swaziland. Earth and Planetary Science Letters, 45, 263-274.
8. CHAZOT, G. & BERTRAND, H. 1993. Mantle sources and magma continental crust interactions during early Red Sea-Aden rifting in south Yemen: elemental and Sr, Nd, Pb isotope evidence. Journal of Geophysical Research, 98, 1818-1835.
9. CHAZOT, G. & BERTRAND, H. 1995. Genesis of silicic magmas during Tertiary continental rifting in Yemen. Lithos, 36, 69-83.
10. CLEVERLY, R.W., BETTON, P.J. & BRISTOW, J.W. 1984. Geochemistry and petrogenesis of the volcanic rocks of the Lebombo rhyolites. In: Petrogenesis of the Volcanic Rocks of the Karoo Province. Geological Society of South Africa Special Publications, 13, 171-195.
11. COX, K.G. 1988. The Karoo province. In: MACDOUGALL, J.D. (ed.) Continental Flood Basalts, Kluwer, Dordrecht, 239-271.
12. DEPAOLO, D.J. 1981. Trace element and isotopic effects of combined wall rock assimilation and fractional crystallization. Earth and Planetary Science Letters, 53, 189-202.
13. DOE, B.R., LEEMAN, W.P., CHRISTIANSEN, R.L. & HEDGE, C.E. 1982. Lead and strontium isotopes and related trace elements as genetic tracers in the upper Cenozoic rhyolite-basalt association of the Yellowstone Plateau volcanic field. Journal of Geophysical Research, 87, 4785-4806.
14. EBINGER, C.J., YEMANE, T., WOLDEGABRIEL, G., ARONSON, J.L. & WALTER, R.C. 1993. Late Eocene-Recent volcanism and rifting in the southern main Ethiopian rift. Journal of the Geological Society. London, 150, 99-108.
15. ERLANK, A.J., MARSH, J.S., DUNCAN, A.R., MILLER, R.M. & HAWKESWORTH, C.J. 1984. Geochemistry and petrogenesis of the Etendeka volcanic rocks from SWA/Namibia. In: Petrogenesis of the Volcanic Rocks of the Karoo Province. Geological Society of South Africa Special Publications, 13, 195-247.
16. EWART, A. & GRIFFIN, W.L. 1994. Application of proton-microprobe data to trace element partitioning in volcanic rocks. Chemical Geology, 117, 251-284.
17. GARLAND, F., HAWKESWORTH, C.J. & MANTOVANI, M.S.M. 1995. Description and petrogenesis of the Parana rhyolites, Southern Brazil. Journal of Petrology, 36, 1193-1227.
18. GEORGE, R., ROGERS, N. & KELLY, S. 1998. Earliest magmatism in Ethiopia: evidence for two mantle plumes in one flood basalt province. Geology, 26, 923-926.
19. HARRIS, C., WHITTINGHAM, A.M., MILNER, S.C. & ARMSTRONG, R.A. 1990. Oxygen isotope geochemistry of the silicic volcanic rocks of the Etendeka-Parana province: source constraints. Geology, 18, 1119-1121.
20. HILDRETH, W., HALLIDAY, A. & CHRISTIANSEN, R.L. 1991. Isotopic and chemical evidence concerning the genesis and contamination of basaltic and rhyolitic magma beneath the Yellowstone plateau volcanic field. Journal of Petrology, 32, 63-138.
21. HOFMANN, C., COURTILLOT, V., FÉRAUD, G., ROCHETTE, P., YIRGU, G., KETEFO, E. & PIK, R. 1997. Timing of the Ethiopian flood basalt event and implications for plume birth and global change. Nature, 389, 838-841.
22. KENEA, N.H., EBINGER, C.J. & REX, D.C. 2001. Late Oligocene volcanism and extension in the southern Red Sea Hills, Sudan. Journal of the Geological Society, London, 158, 285-294.
23. LE BAS, M.J., LE MAITRE, R.W., STRECKEISEN, A. & ZANETTIN, B. 1986. A chemical classification of volcanic rocks based on the total alkali-silica diagram. Journal of Petrology, 27, 745-750.
24. LIGHTFOOT, P.C., HAWKESWORTH, C.J., DEVEY, C.W., ROGERS, N.W. & VAN CALSTEREN, P.W.C. 1990. Source and differentiation of Deccan trap lavas, implications of geochemical and mineral chemical variations. Journal of Petrology, 31, 1165-1200.
25. LIGHTFOOT, P.C., HAWKESWORTH, C.J. & SETHNA, S.F. 1987. Petrogenesis of rhyolites and trachytes from the Deccan trap: Sr, Nd and Pb isotope and trace element evidence. Contributions to Mineralogy and Petrology, 95, 44-54.
26. McDONOUGH, W.F. & SUN, S.S. 1995. The composition of the Earth. Chemical Geology, 120, 223-253.
27. MERLA, G. & ABBATE, E. et al. 1979. A Geological Map of Ethiopia and Somalia (1973) and Comment with a Map of Major Landforms. CNR, Florence.
28. MOHR, P. 1983. The Ethiopian flood basalt province. Nature, 303, 577-584.
29. MOHR, P. & ZANETTIN, B. 1988. The Ethiopian flood basalt province. In: MACDOUGALL, J.D. (ed.) Continental Flood Basalts. Kluwer, Dordrecht, 63-110.
30. NAKAMURA, N. 1974. Determination of REE, Ba, Fe, Mg, Na and K in carbonaceous and ordinary chondrites. Geochimica et Cosmochimica Acta, 38, 757-773.
31. PEARCE, J.A., HARRIS, N.B.W. & TIDLE, A.G. 1984. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology, 25, 956-983.
32. PEATE, D.W., HAWKESWORTH, C.J. & MANTOVANI, M.S.W. 1992. Chemical stratigraphy of the Parana lavas, South America: classification of magma types and their spatial distribution. Bulletin of Volcanology, 55, 119-139.
33. PECCERILLO, A., MANDEFRO, B., SOLOMON, G., HAMBISA, G., BEDRU, H. & TESFAYE, K. 1998. The Precambrian rocks from southern Ethiopia: petrology, geochemistry and their interaction with the recent volcanism from the Ethiopian rift Valley. Neues Jahrbuch für Mineralogie, Abhandlungen, 173, 237-262.
34. PICHAVANT, M., KONTAK, D.J., BRIOUEU, L., HERRERA, J.V. & CLARK, A.H. 1988. The Miocene-Pliocene Macusani volcanics, SE Peru II. Geochemistry and origin of a felsic peraluminous magma. Contributions to Mineralogy and Petrology, 100, 325-338.
35. PIK, R., DENIEL, C., COULON, C., YIRGU, G., HOFMANN, C. & AYALEW, D. 1998. The northwestern Ethiopian plateau flood basalts: classification and spatial distribution of magma types. Journal of Volcanology and Geothermal Research, 81, 91-111.
36. PIK, R., DENIEL, C., COULON, C., YIRGU, G. & MARTY, B. 1999. Isotopic and trace element signatures of Ethiopian flood basalts: evidence for plume-lithosphere interactions. Geochimica et Cosmochimica Acta, 63, 2263-2279.
37. PRESTON, R.J., BELL, B.R. & ROGERS, G. 1998. The Loch Seridian xenolithic sill complex, Isle of Mull, Scotland: fractional crystallization, assimilation, magma-mixing and crustal anatexis in subvolcanic conduits. Journal of Petrology, 39, 519-550.
38. ROCHETTE, P. & TAMRAT, E. et al. 1998. Magnetostratigraphy and timing of the Oligocene Ethiopian traps. Earth and Planetary Science Letters, 164, 497-510.
39. STERN, R.J. & ABDELSALAM, M.G. 1998. Formation of juvenile continental crust in the Arabian-Nubian shield: evidence from granitic rocks of the Nakasib suture, NE Sudan. Geologische Rundschau, 87, 150-160.
40. 86Sr systematics in igneous rocks. Earth and Planetary Science Letters, 47, 243-254.
41. TEKLAY, M., KRÖNER, A., MEZGER, K. & OBERHÄNSLI, R. 1998. Geochemistry, Pb-Pb single zircon ages and Rb-Sr isotope composition of Precambrian rocks from southern and eastern Ethiopia: implication for crustal evolution in east Africa. Journal of African Earth Science, 26, 207-227.
42. 39Ar chronostratigraphy of pre- and syn-rift bimodal flood volcanism in Ethiopia and Yemen. Earth and Planetary Science Letters, 198, 289-306.
43. WAREHAM, C.D., MILLAR, I.L. & VAUGHAN, A.P.M. 1997. The generation of sodic granite magmas, western Plamer land. Antarctic Peninsula. Contributions to Mineralogy and Petrology, 128, 81-96.
44. WOODEN, J.L. & CZAMANSKE, G.K. et al 1993. Isotopic and trace element constraints on mantle and crustal contributions to Siberian continental flood basalts, Noril'sk area, Siberia, Geochimica et Cosmochimica Acta, 57, 3677-3704.