Volcanic vents rooted on extension fractures and their geodynamic implications in the Ethiopian Rift

Journal of Volcanology and Geothermal Research

Volumn 79, Issue 3-4, 1997, Pages 205-222

  Korme, Tesfaye ^a   Chorowicz, Jean ^a   Collet, Bernard ^a   Bonavia, Franco ^a  

^a SORBONNE UNIVERSITÉ   (France)

Author keywords

East african rift; Ethiopia; Extension fracture; Remote sensing; Tectonics; Volcano

Indexed keywords

EID: 0000588115     PISSN: 03770273     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0377-0273(97)00034-6     Document Type: Article

References (27)

1. Barberi, F., Varet, J., 1977. Volcanism of Afar: Small-scale plate-tectonics implications. Geol. Soc. Am. Bull. 88, 1251-1266.
2. Bellier, O., Sébrier, M., 1994. Relationship between tectonism and volcanism along the Great Sumatran Fault Zone deduced by SPOT image analysis. Tectonophysics 233, 215-231.
3. Boccaletti, M., Mammo, T., Bonini, M., Abebe, B., 1994. Seismotectonics of east African rift system: evidences of active oblique rifting. Ann. Tectonic. 8, 87-99.
4. Boldget, H.W., Heirtzler, J.R., 1993. Age discrimination among eruptives of Menengai caldera, Kenya, using vegetation parameters from satellite imagery. Geocarto Int. 1, 51-59.
5. Bosworth, W., Strecker, M.R., Blisniuk, P.M., 1992. Integration of east African paleostress and present day stress data: Implications for continental stress field dynamics. J. Geophys. Res. 97, 11851-11865.
6. Carracedo, J.C., 1994. The Canary Islands: an example of structural control on the growth of large oceanic-island volcanoes. J. Volcanol. Geotherm. Res. 60, 225-241.
7. Chorowicz, J., 1989. Transfer and transform fault zones in continental rifts: examples in the Afro-Arabian Rift System. Implications of crust breaking. J. Afr. Earth Sci. 8, 203-214.
8. Chorowicz, J., 1992. The role of ancient structures in the genesis and evolution of the East African Rift. Soc. Géol. Fr. Bull. 163, 217-227.
9. Chorowicz, J., Collet, B., Bonavia, F., Korme, T., 1994. Northwest to north-northwest extension direction in the Ethiopian rift deduced from the orientation of extension structures and fault-slip analysis. Geol. Soc. Am. Bull. 105, 1560-1570.
10. Chorowicz, J., Bardintzeff, J.M., Rasamimanana, J., Chotin, P., Thouin, C., Rudant, J.P., 1997. An approach using SAR ERS images to relate extension fractures to volcanic vents: examples from Iceland and Madagascar. Tectonophysics 271, 263-283.
11. Delaney, P.T., Pollard, D.D., 1981. Deformation of host rocks and flow of magma during growth of minette dykes and breccia-bearing intrusions near Ship Rock, New Mexico. U.S. Geol. Surv., Prof. Pap. 1202, 61 pp.
12. Du, Y., Aydin, A., 1991. Interaction of multiple cracks and formation of echelon crack arrays. Int. J. Numer. Anal. Methods Geomech. 15, 205-218.
13. Gibson, I.L., 1969. The structure and volcanic geology of an axial portion of the Main Ethiopian Rift. Tectonophysics 8, 561-565.
14. Gudmundsson, A., 1987. Geometry, formation and development of tectonic fractures on the Reykjanes Peninsula Southwest Iceland. Tectonophysics 139, 295-305.
15. Gudmundsson, A., 1995. Infrastructure and mechanics of volcanic system in Iceland. J. Volcanol. Geotherm. Res. 64, 1-22.
16. Hart, W.K., WoldeGabriel, G., Walter, R.C., Mertzman, S.A., 1989. Basaltic volcanism in Ethiopia; constraints on continental rifting and mantle interaction. J. Geophys. Res. 94, 7731-7748.
17. Haug, G.H., 1995. Volcanotectonic evolution of the Chyulu Hills and implication for the regional stress field in Kenya. Geology 23, 165-168.
18. Lange, F.F., 1968. Interaction between overlapping parallel cracks; a photoelastic study. Int. J. Fract. Mech. 4, 287-294.
19. Mohr, P.A., 1967. The Ethiopian rift system. Bull. Geophys. Obs. Addis Ababa 11, 1-65.
20. Mohr, P.A., Potter, E.C., 1976. The Sagatu Ridge dike swarm Ethiopian rift margin. J. Volcanol. Geotherm. Res. 1, 55-71.
21. Mohr, P.A., Wood, C.A., 1976. Volcano spacing and lithospheric attenuation in the eastern rift of Africa. Earth Planet. Sci. Lett. 33, 126-144.
22. Nakamura, K., 1977. Volcanoes as possible indicators of tectonic stress orientation. J. Volcanol. Geotherm. Res. 2, 1-16.
23. Opheim, J.A., Gudmundsson, A., 1989. Formation and geometry of fractures and related volcanism of the Krafla fissure swarm, northeast Iceland. Geol. Soc. Am. Bull. 101, 1608-1622.
24. Pollard, D.D., Delaney, P.T., Duffield, W.A., Okamura, A.T., 1983. Surface deformation in volcanic rift zone. In: Morgan, P., Baker, B.H. (Eds.), Processes of Continental Rifting. Tectonophysics 94, 541-584.
25. Strecker, M.R., Blisniuk, P.M., Eisbacher, G.H., 1990. Rotation of extension direction in the central Kenya rift. Geology 18, 299-302.
26. Takada, A., 1994. Development of subvolcanic structures by the interaction of liquid-field cracks. J. Volcanol. Geotherm. Res. 62, 207-224.
27. WoldeGabriel, G., Aronson, J.L., Walter, R.C., 1990. Geology, geochronology and rift basin development in the central sector of the Main Ethiopian Rift. Geol. Soc. Am. Bull. 102, 439-452.