A. G. Baines, M. J. Cheadle, B. E. John, and J. J. Schwartz, The rate of oceanic detachment faulting at Atlantis Bank, SW Indian Ridge, Earth and Planetary Science Letters, vol.273, issue.1-2, pp.105-114, 2008.
DOI : 10.1016/j.epsl.2008.06.013

M. Benoit, G. Ceuleneer, and M. Polvé, The remelting of hydrothermally altered peridotite at mid?ocean ridges by intruding mantle diapir, Nature, vol.402, pp.514-51810, 1999.

F. Birch, The velocity of compressional waves in rocks to 10 kilobars: 2., Journal of Geophysical Research, vol.19, issue.no. 8, pp.2199-222410, 1961.
DOI : 10.1029/JZ066i007p02199

D. K. Blackman, J. R. Cann, B. Janssen, and D. K. Smith, Origin of extensional core complexes: Evidence from the Mid-Atlantic Ridge at Atlantis Fracture Zone, Journal of Geophysical Research: Solid Earth, vol.17, issue.441, pp.315-21333, 1998.
DOI : 10.1029/98JB01756

W. R. Buck, flexural rotation of normal faults, Tectonics, vol.2, issue.5, pp.959-97310, 1988.
DOI : 10.1029/TC007i005p00959

J. P. Canales and J. A. Collins, Seismic structure across the rift valley of the Mid-Atlantic Ridge at 23??20??? (MARK area): Implications for crustal accretion processes at slow spreading ridges, Journal of Geophysical Research: Solid Earth, vol.103, issue.46, pp.411-28425, 2000.
DOI : 10.1029/2000JB900301

J. P. Canales, B. E. Tucholke, and J. A. Collins, Seismic reflection imaging of an oceanic detachment fault: Atlantis megamullion (Mid-Atlantic Ridge, 30??10???N), Earth and Planetary Science Letters, vol.222, issue.2, pp.543-560, 2004.
DOI : 10.1016/j.epsl.2004.02.023

J. P. Canales, B. E. Tucholke, M. Xu, J. A. Collins, and D. L. Dubois, Seismic evidence for large-scale compositional heterogeneity of oceanic core complexes, Geochemistry, Geophysics, Geosystems, vol.99, issue.8, pp.10-1029, 2008.
DOI : 10.1029/2008GC002009

J. R. Cann, D. K. Blackman, D. K. Smith, B. Mcallister, S. Janssen et al., Corrugated slip surfaces formed at ridge???transform intersections on the Mid-Atlantic Ridge, Corrugated slip surfaces formed at ridge?transform intersections on the Mid?Atlantic Ridge, pp.329-33210385329, 1038.
DOI : 10.1038/385329a0

M. Cannat, How thick is the magmatic crust at slow spreading oceanic ridges?, Journal of Geophysical Research: Solid Earth, vol.74, issue.43, pp.2847-285710, 1996.
DOI : 10.1029/95JB03116

M. Cannat, Thin crust, ultramafic exposures, and rugged faulting patterns at the Mid-Atlantic Ridge (22?????24??N), 023<0049:TCUEAR>2.3.CO, pp.22-24, 1130.
DOI : 10.1130/0091-7613(1995)023<0049:TCUEAR>2.3.CO;2

R. L. Carlson, Seismic velocities in the uppermost oceanic crust: Age dependence and the fate of layer 2A, Journal of Geophysical Research: Solid Earth, vol.96, issue.B4, pp.7069-707710, 1998.
DOI : 10.1029/97JB03577

R. L. Carlson and C. N. Herrick, Densities and porosities in the oceanic crust and their variations with depth and age, Journal of Geophysical Research, vol.102, issue.53, pp.9153-917010, 1990.
DOI : 10.1029/JB095iB06p09153

R. L. Carlson and D. J. Miller, Mantle wedge water contents estimated from seismic velocities in partially serpentinised peridotites, Geophys . Res. Lett, vol.30, issue.5, pp.125010-1029, 2003.

G. Ceuleneer and M. Cannat, High-temperature ductile deformation of Site 920 peridotites, Proc. Ocean Drilling Program, Scientific Results, pp.23-34, 1997.
DOI : 10.2973/odp.proc.sr.153.002.1997

G. Ceuleneer, A. Nicolas, and F. Boudier, Mantle flow patterns at an oceanic spreading centre: The Oman peridotites record, Tectonophysics, vol.151, issue.1-4, pp.1-2610, 1988.
DOI : 10.1016/0040-1951(88)90238-7

B. J. De-martin, R. A. Sohn, J. P. Canales, and S. E. Humphris, Kinematics and geometry of active detachment faulting beneath the Trans-Atlantic Geotraverse (TAG) hydrothermal field on the Mid-Atlantic Ridge, Geology, vol.35, issue.8, pp.711-714, 2007.
DOI : 10.1130/G23718A.1

H. J. Dick, A long in situ section of the lower ocean crust: results of ODP Leg 176 drilling at the Southwest Indian Ridge, Earth and Planetary Science Letters, vol.179, issue.1, pp.31-5110, 2000.
DOI : 10.1016/S0012-821X(00)00102-3

H. J. Dick, M. A. Tivey, and B. E. Tucholke, Plutonic foundation of a slow?spreading ridge segment: Oceanic core complex at Kane Megamullion, Geophys. Geosyst, pp.10-1029, 2008.

D. Elthon, Petrology of gabbroic rocks from the Mid-Cayman Rise Spreading Center, Journal of Geophysical Research, vol.7, issue.3, pp.658-682, 1987.
DOI : 10.1029/JB092iB01p00658

J. Escartin, C. Mével, C. J. Macleod, and A. M. Mccaig, Constraints on deformation conditions and the origin of oceanic detachments: The Mid-Atlantic Ridge core complex at 15??45???N, Geochemistry, Geophysics, Geosystems, vol.72, issue.46, pp.106710-1029, 2003.
DOI : 10.1029/2002GC000364

J. Escartin, D. K. Smith, H. Cann, C. L. Shouten, S. Langmuir et al., Central role of detachment faults in accretion of slow-spreading oceanic lithosphere, Nature, vol.6, issue.7214, pp.790-79410, 2008.
DOI : 10.1038/nature07333

E. R. Flueh and J. Bialas, A digital, high data capacity ocean bottom recorder for seismic investigations, Int. Underwater Syst. Design, vol.18, pp.18-20, 1996.

P. Gente, Geometry of past and present?day segmentation of the Mid?Atlantic Ridge south of Kane fracture zone, Spring Meet, pp.72-477, 1991.

P. Gente, R. A. Pockalny, C. Durand, C. Deplus, M. Maia et al., Characteristics and evolution of the segmentation of the Mid-Atlantic Ridge between 20??N and 24??N during the last 10 million years, Earth and Planetary Science Letters, vol.129, issue.1-4, pp.55-7110, 1995.
DOI : 10.1016/0012-821X(94)00233-O

I. Ghose, M. Cannat, and M. Seyler, Transform fault effect on mantle melting in the MARK area (Mid-Atlantic Ridge south of the Kane transform), Geology, vol.24, issue.12, pp.1139-11420091, 1130.
DOI : 10.1130/0091-7613(1996)024<1139:TFEOMM>2.3.CO;2

I. Grevemeyer and W. Weigel, Seismic velocities of the uppermost igneous crust versus age, Geophysical Journal International, vol.124, issue.2, pp.631-635, 1996.
DOI : 10.1111/j.1365-246X.1996.tb07041.x

I. Grevemeyer, W. Weigel, and C. Jennrich, Structure and ageing of oceanic crust at 14??S on the East Pacific Rise, Geophysical Journal International, vol.135, issue.2, pp.573-584, 1998.
DOI : 10.1046/j.1365-246X.1998.00673.x

I. Grevemeyer, N. Kaul, H. Villinger, and W. Weigel, Hydrothermal activity and the evolution of the seismic properties of upper oceanic crust, Journal of Geophysical Research: Solid Earth, vol.108, issue.50, pp.5069-507910, 1999.
DOI : 10.1029/1998JB900096

P. Y. Huang and S. C. Solomon, "Centroid depths and mechanisms of mid-ocean ridge earthquakes in the Indian Ocean. Gulf of Aden, and Red Sea"", Journal of Geophysical Research, vol.15, issue.B2, pp.1361-138210, 1987.
DOI : 10.1029/JB092iB02p01361

P. Y. Huang and S. C. Solomon, Centroid Depths of Mid-Ocean Ridge Earthquakes: Dependence on Spreading Rate, Journal of Geophysical Research: Solid Earth, vol.19, issue.147, pp.445-1310, 1988.
DOI : 10.1029/JB093iB11p13445

B. Ildefonse, D. K. Blackman, B. E. John, Y. Ohara, D. J. Miller et al., Oceanic core complexes and crustal accretion at slow-spreading ridges, Geology, vol.35, issue.7, pp.623-626, 2007.
DOI : 10.1130/G23531A.1

J. A. Karson, Along-axis variations in seafloor spreading in the MARK area, Nature, vol.328, issue.6132, pp.681-68510, 1038.
DOI : 10.1038/328681a0

. Korenaga, Crustal structure of the southeast Greenland margin from joint refraction and reflection seismic tomography, Journal of Geophysical Research: Solid Earth, vol.103, issue.B9, pp.591-2110, 2000.
DOI : 10.1029/2000JB900188

J. H. Luetgert, Interactive two?dimensional seismic raytracing for the Macintosh, U.S. Geological Survey, Open?File Report, pp.92-356, 1992.

M. Maia and P. Gente, Three-dimensional gravity and bathymetry analysis of the Mid-Atlantic Ridge between 20??N and 24??N: Flow geometry and temporal evolution of the segmentation, Journal of Geophysical Research: Solid Earth, vol.113, issue.43, pp.951-974, 1998.
DOI : 10.1029/97JB01635

M. R. Muller, T. A. Minshull, and R. S. White, Crustal structure of the Southwest Indian Ridge at the Atlantis II Fracture Zone, Journal of Geophysical Research: Solid Earth, vol.108, issue.45, pp.809-2510, 2000.
DOI : 10.1029/2000JB900262

J. H. Natland and H. J. Dick, Melt Migration through High-Level Gabbroic Cumulates of the East Pacific Rise at Hess Deep: The Origin of Magma Lenses and the Deep Crustal Structure of Fast-Spreading Ridges, Proc. Ocean Drilling Program, pp.21-59, 1996.
DOI : 10.2973/odp.proc.sr.147.002.1996

A. Nur, H. Ron, and O. Scotti, Fault mechanics and the kinematics of block rotations, 14<746:FMATKO>2.0.CO, pp.746-7490091, 1130.
DOI : 10.1130/0091-7613(1986)14<746:FMATKO>2.0.CO;2

L. Planert, E. R. Flueh, F. Tilmann, I. Grevemeyer, and T. J. Reston, Crustal structure of a rifted oceanic core complex and its conjugate side at the MAR at 5??S: implications for melt extraction during detachment faulting and core complex formation, Geophysical Journal International, vol.181, issue.1, pp.113-126, 2010.
DOI : 10.1111/j.1365-246X.2010.04504.x

G. M. Purdy and R. S. Detrick, Crustal structure of the Mid-Atlantic Ridge at 23??N from seismic refraction studies, Journal of Geophysical Research: Solid Earth, vol.37, issue.B3, pp.3739-376210, 1986.
DOI : 10.1029/JB091iB03p03739

M. Python, G. Ceuleneer, Y. Ishida, J. A. Barrat, and S. Arai, Oman diopsidites: a new lithology diagnostic of very high temperature hydrothermal circulation in mantle peridotite below oceanic spreading centres, Earth and Planetary Science Letters, vol.255, issue.3-4, pp.289-305, 2007.
DOI : 10.1016/j.epsl.2006.12.030
URL : https://hal.archives-ouvertes.fr/hal-00155124

C. R. Ranero and T. J. Reston, Detachment faulting at ocean core complexes, 027<0983:DFAOCC>2.3.CO, pp.983-9860091, 1130.
DOI : 10.1130/0091-7613(1999)027<0983:DFAOCC>2.3.CO;2

T. J. Reston, W. Weinrebe, I. Grevemeyer, E. R. Flueh, N. C. Mitchell et al., A rifted inside corner massif on the Mid-Atlantic Ridge at 5??S, Earth and Planetary Science Letters, vol.200, issue.3-4, pp.155-16910, 2002.
DOI : 10.1016/S0012-821X(02)00636-2

T. J. Reston, C. R. Ranero, O. Ruoff, M. Peres?gussinye, and J. J. Dañobeitia, Geometry of extensional faults developed at slow?spreading centres from pre?stacked depth migration of seismic reflection data in the Central Atlantic (Canary Basin), Geophys, J. Int, vol.159, pp.591-606, 2004.

K. Ross and D. Elthon, Cumulus and postcumulus crystallization in the oceanic crust: major- and trace-element geochemistry of Leg 153 gabbroic rocks, Proc. Ocean Drilling Program, pp.23-34, 1997.
DOI : 10.2973/odp.proc.sr.153.023.1997

D. K. Smith, J. Escart?n, H. Schouten, and J. R. Cann, Fault rotation and core complex formation: Significant processes in seafloor formation at slow-spreading mid-ocean ridges (Mid-Atlantic Ridge, 13??-15??N), Geochemistry, Geophysics, Geosystems, vol.7, issue.52, pp.13-15, 2008.
DOI : 10.1029/2007GC001699

D. K. Smith, J. R. Cann, and J. Escartin, Widespread active detachment faulting and core complex formation near 13?????N on the Mid-Atlantic Ridge, Nature, vol.101, issue.7101, pp.440-443, 2006.
DOI : 10.1038/nature04950

J. M. Stevenson, J. A. Hildebrand, and M. A. Zumberge, An ocean bottom gravity study of the southern Juan de Fuca Ridge, Journal of Geophysical Research: Solid Earth, vol.96, issue.44, pp.4875-488810, 1994.
DOI : 10.1029/93JB02076

F. Tilmann, E. Flueh, L. Planert, T. Reston, and W. Weinrebe, Microearthquake seismicity of the Mid-Atlantic Ridge at 5??S: A view of tectonic extension, Journal of Geophysical Research: Solid Earth, vol.103, issue.B3, pp.610210-1029, 2004.
DOI : 10.1029/2002JB001964

D. R. Toomey, S. C. Solomin, and G. M. Purdy, Microearthquakes beneath Median Valley of Mid-Atlantic Ridge near 23??N: Tomography and tectonics, Journal of Geophysical Research, vol.10, issue.4, pp.9093-911210, 1988.
DOI : 10.1029/JB093iB08p09093

B. E. Tucholke and J. Lin, A geological model for the structure of ridge segments in slow spreading ocean crust, Journal of Geophysical Research: Solid Earth, vol.159, issue.14, pp.937-1110, 1994.
DOI : 10.1029/94JB00338

B. E. Tucholke, J. Lin, and M. C. Kleinrock, Megamullions and mullion structure defining oceanic metamorphic core complexes on the Mid-Atlantic Ridge, Journal of Geophysical Research: Solid Earth, vol.104, issue.46, pp.9857-986610, 1998.
DOI : 10.1029/98JB00167

R. S. White, D. Mckenzie, and R. K. , Oceanic crustal thickness from seismic measurements and rare earth element inversions, Journal of Geophysical Research, vol.13, issue.10, pp.683-702, 1992.
DOI : 10.1029/92JB01749