A new mantle xenolith locality from Simien shield volcano, NW Ethiopia

Geological Magazine

Volumn 146, Issue 1, 2008, Pages 144-149

  Ayalew, Dereje ^a   Arndt, Nick ^b   Bastien, Florence ^b   Yirgu, Gezahegn ^a   Kieffer, Bruno ^c  

^a ADDIS ABABA UNIVERSITY   (Ethiopia)

^b UNIVERSITÉ GRENOBLE ALPES   (France)

^c UNIVERSITY OF BRITISH COLUMBIA   (Canada)

Author keywords

lithospheric mantle; Simien; spinel lherzolites; xenolith

Indexed keywords

EID: 85011531747     PISSN: 00167568     EISSN: 14695081     Source Type: Journal    
DOI: 10.1017/S0016756808005785     Document Type: Article

References (30)

1. Arai S. 1994. Characterization of spinel peridotites by olivine-spinel compositional relationships: Review and interpretation. Chemical Geology 113, 191–204.
2. 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, 1429–48.
3. Ayalew D. & Yirgu Y. 2003. Crustal contribution to the genesis of Ethiopian plateau rhyolitic ignimbrites: basalt and rhyolite geochemical provinciality. Journal of the Geological Society, London 160, 47–56.
4. Ayalew D., Yirgu Y., Ketefo E., Barbey P. & Ludden J. 2003. Intrusive equivalent of flood volcanics: evidence from petrology of xenoliths in Quaternary Tana basanites. SINET: Ethiopian Journal of Science 26, 93–102.
5. Bali E., Zanetti A., Szabó C., Peate D. W. & Waight T. E. 2008. A micro-scale investigation of melt production and extraction in the upper mantle based on silicate melt pockets in ultramafic xenoliths from the Bakony–Balaton Highland Volcanic Field (Western Hungary). Contributions to Mineralogy and Petrology 155, 165–79.
6. Barnes S. T. & Roeder P. L. 2001. The Range of Spinel Compositions in Terrestrial Mafic and Ultramafic Rocks. Journal of Petrology 42, 2279–302.
7. Barrat J. A., Keller F., Amossé J., Taylor R. N., Nesbitt R. W. & Hirata T. 1996. Determination of rare earth elements in sixteen silicate reference samples by ICP-MS after Tm addition and ion exchange separation. Geostandards Newsletter 20, 133–9.
8. Bedini R. M. & Bodinier J. L. 1999. Distribution of incompatible trace elements between the constituents of spinel peridotite xenoliths; ICP-MS data from the East African Rift. Geochimica et Cosmochimica Acta 63, 3883–900.
9. Bedini R. M., Bodinier J. L., Dautria J. M. & Morten L. 1997. Evolution of LILE-enriched small melt fractions in the lithospheric mantle; a case study from the East African Rift. Earth and Planetary Science Letters 153, 67–83.
10. Chazot G., Menzies M. A. & Harte B. 1996. Determination of partition coefficients between apatite, clinopyroxene, amphibole, and melt in natural spinel lherzolites from Yemen: implications for wet melting of the lithospheric mantle. Geochimica et Cosmochimica Acta 60, 423–37.
11. Conticelli S., Sintoni M. F., Abebe T., Mazzarini F. & Manetti P. 1999. Petrology and geochemistry of ultramafic xenoliths and host lavas from the Ethiopian volcanic province: an insight into the upper mantle under eastern Africa. Acta Vulcanologica 11, 143–59.
12. Demény A., Vennemann T. W., Hegner E., Nagy G., Milton J. A., Embey-Isztin A., Homonnay Z. & Dobosi G. 2004. Trace element and C–O–Sr–Nd isotope evidence for subduction related carbonate–silicate melts in mantle xenoliths (Pannonian Basin, Hungary). Lithos 75, 89–113.
13. Dick H. J. B. & Bullen T. 1984. Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotites and spatially associated lavas. Contributions to Mineralogy and Petrology 86, 54–76.
14. Ferrando S., Frezzotti M. L., Neumann E. R., De Astis G., Peccerillo A., Dereje A., Gezahegn Y. & Teklewold A. 2008. Composition and thermal structure of the lithosphere beneath the Ethiopian plateau: evidence from mantle xenoliths in basanites, Injibara, Lake Tana Province. Mineralogy and Petrology 93, 47–78.
15. 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, 838–41.
16. Ionov D. A., Chazot G., Chauvel C., Merlet C. & Bodinier J. L. 2006. Trace element distribution in peridotite xenoliths from Tok, SE Siberian craton: a record of pervasive, multi-stage metasomatism in shallow refractory mantle. Geochimica et Cosmochimica Acta 70, 1231–60.
17. Ionov D. A., Hofmann A. W. & Shimizu N. 1994. Metasomatism-induced melting in mantle xenoliths from Mongolia. Journal of Petrology 35, 753–85.
18. Kaeser B., Kalt A. & Pettke T. 2006. Evolution of the lithospheric mantle beneath the Marsabit volcanic field (northern Kenya): constraints from textural, P–T and geochemical studies on xenoliths. Journal of Petrology 47, 2149–84.
19. Kaeser B., Kalt A. & Pettke T. 2007. Crystallization and Breakdown of Metasomatic Phases in Graphite-bearing Peridotite Xenoliths from Marsabit (Kenya). Journal of Petrology 48, 1725–60.
20. Kieffer B., Arndt N., Lapierre H., Bastien F., Bosch D., Pecher A., Yirgu G., Ayalew D., Weis D., Jerram D. A., Keller F. & Meugniot C. 2004. Flood and Shield basalts from Ethiopia: magmas from the African superswell. Journal of Petrology 45, 793–834.
21. Lorand J.-P., Reisberg L., Bedini R. M., Horan M. F., Brandon A. D. & Neal C. R. 2003. Platinum-group elements and melt percolation processes in Sidamo spinel peridotite xenoliths, Ethiopia, East African Rift. Chemical Geology 196, 57–75.
22. McDonough W. F. & Sun S. S. 1995. The composition of the Earth. Chemical Geology 120, 223–53.
23. Morten L., Defrancesco A. M., Bonavia F. F., Haileselassie G., Bargossi G. M. & Bondi M. 1992. A New Mantle Xenolith Locality from Southern Ethiopia. Mineralogical Magazine 56, 422–5.
24. 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.
25. Rochette P., Tamrat E., Féraud G., Pik R., Courtillot V., Ketefo E., Coulon C., Hofmann C., Vandamme D. & Yirgu G. 1998. Magnetostratigraphy and timing of the Oligocene Ethiopian traps. Earth and Planetary Science Letters 164, 497–510.
26. Roger S., Dautria J. M., Coulon C., Pik R., Yirgu G., Michard A., Legros P. & Ayalew D. 1999. An insight on the nature, composition and evolution of the lithospheric mantle beneath the north-western Ethiopian Plateau; the ultrabasic xenoliths from the Tana Lake Province. Acta Vulcanologica 11, 161–8.
27. Roger S., Pik R., Dautria J. M., Coulon C., Yirgu G., Ayalew D. & Legros P. 1997. Rifting actif ou passif en Ethiopie? Elements de reponse apportes par l'etude des xenolites peridotitiques de la region du lac Tana. [Active or passive rifting in Ethiopia? Contribution of peridotitic xenoliths from the Lake Tana area.] Comptes Rendu de l'Academie des Sciences de Paris 324, 1009–16.
28. Rooney T. O., Furman T., Yirgu G. & Ayalew D. 2005. Structure of the Ethiopian lithosphere: evidence from mantle xenoliths. Geochimica et Cosmochimica Acta 69, 3889–910.
29. Shaw S. J., Heidelbach F. & Dingwell D. B. 2006. The origin of reaction textures in mantle peridotite xenoliths from Sal Island, Cape Verde: the case for ‘metasomatism’ by the host lava. Contributions to Mineralogy and Petrology 151, 681–97.
30. Shimizu N. 1975. Rare earth elements in garnets and clinopyroxenes from garnet lherzolite nodules in kimberlites. Earth and Planetary Science Letters 25, 26–32.