Three-dimensional seismic imaging of a protoridge axis in the Main Ethiopian rift

Geology

Volumn 32, Issue 11, 2004, Pages 949-952

  Keranen, K ^a   Klemperer, S L ^a   Gloaguen, R ^b   Asfaw, L ^c   Ayele, A ^c   Ebinger, C ^c   Furman, T ^c   Harder, S ^c   Keler, G R ^c   Mackenzie, G D ^c   Maguire, P K H ^c   Stuart, G W ^c  

^a STANFORD UNIVERSITY   (United States)

^b TU BERGAKADEMIE FREIBERG   (Germany)

^c NONE

Author keywords

Controlled source seismology; Ethiopia; Magmatism; Rifting; Tomography

Indexed keywords

PROTORIDGE AXIS; SEAFLOOR; SEISMIC IMAGING;

APPROXIMATION THEORY; MATHEMATICAL MODELS; STRAIN; VELOCITY;

SEISMIC PROSPECTING;

CRUSTAL STRUCTURE; IGNEOUS INTRUSION; P-WAVE; RIFTING; SEISMIC TOMOGRAPHY; SEISMIC VELOCITY;

AFRICA; EAST AFRICAN RIFT; EASTERN HEMISPHERE; ETHIOPIAN RIFT; SUB-SAHARAN AFRICA; WORLD;

EID: 9144238756     PISSN: 00917613     EISSN: None     Source Type: Journal    
DOI: 10.1130/G20737.1     Document Type: Article

References (25)

1. Ayele, A., Nyblade, A.A., Langston, C.A., Cara, M., and Leveque, J.-J., 2004, The May 2000 earthquake swarm near Gewane in south Afar, in Yirgu, G., et al., eds., Proceedings of International Conference on the East African Rift System, June 20-24 2004, Addis Ababa, Ethiopia: Ethiopian Geoscience and Mineral Engineering Association, p. 23-25.
2. Bastow, I.D., Stuart, G.W., Kendall, J.-M., Ebinger, C.J., Ayele, A., Cornwell, D.G., and Maguire, P.K.H., 2004, Upper mantle seismic structure of the Northern Ethiopia rift-a region of incipient continental breakup, in Yirgu, G., et al., eds., Proceedings of International Conference on the East African Rift System, June 20-24 2004, Addis Ababa, Ethiopia: Ethiopian Geoscience and Mineral Engineering Association, p. 30-33.
3. Berckhemer, H., Baier, B., Bartelson, H., Behle, A., Burkhardt, H., Gebrande, H., Makris, J., Menzel, H., Miller, H., and Vees, R., 1975, Deep seismic soundings in the Afar region and on the highland of Ethiopia, in Pilger, A., and Roesler, A., eds., Afar between continental and oceanic rifting: Stuttgart, Schweizerbart, p. 89-107.
4. Bilham, R., Bendick, R., Larson, K., Braun, J., Tesfaye, S., Mohr, P., and Asfaw, L., 1999, Secular and tidal strain across the Ethiopian rift: Geophysical Research Letters, v. 27, p. 2789-2984.
5. Campbell-Stone, E., and John, B., 2003, Temporal changes in deformation mode: From failure to flow in the Colorado River extensional corridor, in Klemperer, S.L., and Ernst, G., eds., The lithosphere of western North America and its geophysical characterization: Geological Society of America International Book Series, v. 7, p. 348-363.
6. Christensen, N.I., and Mooney, W.D., 1995, Seismic velocity structure and composition of the continental crust: A global view: Journal of Geophysical Research, v. 100, p. 9761-9788.
7. Dick, H.J.B., Lin, J., and Schouten, H., 2003, An ultraslow-spreading class of ocean ridge: Nature, v. 426, p. 405-412.
8. Ebinger, C.J., and Casey, M., 2001, Continental breakup in magmatic provinces: An Ethiopian example: Geology, v. 29, p. 527-530.
9. Ebinger, C.J., and Hayward, N., 1996, Soft plates and hot spots: Views from Afar: Journal of Geophysical Research, v. 101, p. 21,859-21,876.
10. Ebinger, C.J., and Sleep, N.H., 1998, Cenozoic magmatism throughout East Africa resulting from impact of a single plume: Nature, v. 395, p. 788-791.
11. Endeshaw, A., 1988, Current status (1987) of geothermal exploration in Ethiopia: Geothermics, v. 17, p. 477-488.
12. Furman, T., 2003, Geochemical overview of the East African rift system: Eos (Transactions, American Geophysical Union), v. 84, no. 46, abs. S52G-03.
13. Gibson, I.L., 1967, Preliminary account of the volcanic geology of Fantale, Shoa: Addis Ababa: Geophysical Observatory Bulletin, v. 10, p. 59-67.
14. Hole, J.A., 1992, Nonlinear high-resolution three-dimensional seismic travel time tomography: Journal of Geophysical Research, v. 97, p. 6553-6562.
15. Horner-Johnson, B.C., Gordon, R.G., Cowles, S.M., and Argus, D.F., 2003, The angular velocity of Nubia relative to Somalia and the location of the Nubia-Somalia-Antarctica triple junction: Eos (Transactions, American Geophysical Union), v. 84, no. 46, abs. T52F-01.
16. Keller, G.R., Harder, S.H., O'Reilly, B., Mickus, K., Tadesse, K., Maguire, P.K.M., and the EAGLE Working Group, 2004, A preliminary analysis of crustal structure variations along the Ethiopian Rift, in Yirgu, G., et al., eds., Proceedings of International Conference on the East African Rift System, June 20-24 2004, Addis Ababa, Ethiopia: Ethiopian Geoscience and Mineral Engineering Association, p. 97-101.
17. Maguire, P.K.H., Ebinger, C.J., Stuart, G.W., Mackenzie, G.D., Whaler, K.A., Kendall, J.-M., Khan, M.A., Fowler, C.M.R., Klemperer, S.L., Keller, G.R., Harder, S., Furman, T., Mickus, K., Asfaw, L., Ayele, A., and Abebe, B., 2003, Geophysical project in Ethiopia studies continental breakup: Eos (Transactions, American Geophysical Union), v. 84, p. 337, 342-343.
18. Mahatsente, R., Jentzsch, G., and Jahr, T., 1999, Crustal structure of the Main Ethiopian rift gravity data: 3-dimensional modeling: Tectonophysics, v. 313, p. 363-382.
19. Menzies, M.A., Klemperer, S.L., Ebinger, C.J., and Baker, J., 2002, Characteristics of volcanic rifted margins, in Menzies, M.A., et al., eds., Volcanic rifted margins: Geological Society of America Special Paper 362, p. 1-14.
20. Montelli, R., Nolet, G., Dahlen, F.A., Masters, G., Engdahl, E.R., and Hung, S., 2004, Finite-frequency tomography reveals a variety of plumes in the mantle: Science, v. 303, p. 338-343.
21. Parsons, T., and Thompson, G.A., 1993, Does magmatism influence low-angle normal faulting?: Geology, v. 21, p. 247-250.
22. Pik, R., Deniel, C., Coulon, C., Yirgu, G., and Marty, B., 1999, Isotopic and trace element signatures of Ethiopian flood basalts: Evidence for plumelithosphere interactions: Geochimica et Cosmochimica Acta, v. 63, p. 2263-2279.
23. Sinton, J.M., and Detrick, R.S., 1992, Midocean ridge magma chambers: Journal of Geophysical Research, v. 97, p. 197-216.
24. WoldeGabriel, G., Aronson, J.L., and Walter, R.C., 1990, Geology, geochronology, and rift basin development in the central sector of the Main Ethiopian rift: Geological Society of America Bulletin, v. 102, p. 439-485.
25. Wolfenden, E., Ebinger, C., Yirgu, G., Deino, A., and Ayalew, D., 2004, Evolution of the northern Main Ethiopian rift: Birth of a triple junction: Earth and Planetary Science Letters, v. 224, p. 213-228.