J. Arkani-hamed, Thermoviscous remanent magnetization of oceanic lithosphere inferred from its thermal evolution, Journal of Geophysical Research, vol.93, issue.2, pp.17-421, 1989.
DOI : 10.1029/JB094iB12p17421

A. H. Barclay, D. R. Toomey, G. M. Purdy, and S. C. Solomon, FARA microearthquakes experiments III: results from the Mid-Atlantic Ridge at 35 ? N, AGU Fall meeting, p.601, 1993.

M. M. Bina and B. Henry, Magnetic properties, opaque mineralogy and magnetic anisotropies of serpentinized peridotites from ODP Hole 670A near the Mid-Atlantic Ridge, Physics of the Earth and Planetary Interiors, vol.65, issue.1-2, pp.88-103, 1990.
DOI : 10.1016/0031-9201(90)90078-C

U. Bleil and N. Petersen, Variations in magnetization intensity and low-temperature titanomagnetite oxidation of ocean floor basalts, Nature, vol.29, issue.5899, pp.384-388, 1983.
DOI : 10.1038/301384a0

J. P. Canales, R. S. Detrick, J. Lin, and J. A. Collins, Crustal and upper mantle seismic structure beneath the rift mountains and across a nontransform offset at the Mid-Atlantic Ridge (35??N), Journal of Geophysical Research: Solid Earth, vol.108, issue.17, pp.2699-2719, 2000.
DOI : 10.1029/1999JB900379

M. Cannat, Emplacement of mantle rocks in the seafloor at mid-ocean ridges, Journal of Geophysical Research: Solid Earth, vol.312, issue.109, pp.4163-4172, 1993.
DOI : 10.1029/92JB02221

M. Cannat, Thin crust, ultramafic exposures, and rugged faulting patterns at the Mid-Atlantic Ridge (22?????24??N), Geology, vol.23, issue.1, pp.49-52, 1995.
DOI : 10.1130/0091-7613(1995)023<0049:TCUEAR>2.3.CO;2

W. P. Chen and P. Molnar, Focal depths of intracontinental and intraplate earthquakes and their implications for the thermal and mechanical properties of the lithosphere, Journal of Geophysical Research: Solid Earth, vol.88, issue.B5, pp.4183-4214, 1983.
DOI : 10.1029/JB088iB05p04183

N. I. Christensen, Elasticity of ultrabasic rocks, Journal of Geophysical Research, vol.65, issue.22, pp.5921-5931, 1966.
DOI : 10.1029/JZ071i024p05921

K. Crane and R. D. Ballard, Volcanics and structure of the famous Narrowgate Rift: evidence for cyclic evolution: AMAR 1, Journal of Geophysical Research: Solid Earth, vol.80, issue.B6, pp.5112-5124, 1981.
DOI : 10.1029/JB086iB06p05112

R. S. Detrick, H. D. Needham, and V. Renard, Gravity anomalies and crustal thickness variations along the Mid-Atlantic Ridge between 33??N and 40??N, Journal of Geophysical Research: Solid Earth, vol.71, issue.44, pp.3767-3787, 1995.
DOI : 10.1029/94JB02649

C. Durand, P. Gente, and O. Dauteuil, Caractéristiques morphologiques des segments axiaux de la dorsale Médio-Atlantique entre 20 ? N et 24 ? N, C. R. Acad. Sci, vol.320, pp.411-418, 1995.

J. Dyment, Evolution of the Indian Ocean Triple Junction between 65 and 49 Ma (anomalies 28 to 21), Journal of Geophysical Research: Solid Earth, vol.89, issue.B8, pp.13-863, 1993.
DOI : 10.1029/93JB00438

J. Dyment, Evolution of the Carlsberg Ridge between 60 and 45, 1998.

. Ma, ridge propagation, spreading asymmetry, and the Deccan-Reunion hotspot, J. geophys. Res, vol.103, issue.24, pp.67-91

J. Dyment and J. Arkani-hamed, Spreading-rate-dependent magnetization of the oceanic lithosphere inferred from the anomalous skewness of marine magnetic anomalies, Geophysical Journal International, vol.121, issue.3, pp.789-804, 1995.
DOI : 10.1111/j.1365-246X.1995.tb06439.x

J. Dyment, J. Arkani-hamed, and A. Ghods, Contribution of serpentinized ultramafics to marine magnetic anomalies at slow and intermediate spreading centres: insights from the shape of the anomalies, Geophysical Journal International, vol.129, issue.3, pp.691-701, 1997.
DOI : 10.1111/j.1365-246X.1997.tb04504.x

S. Gac, J. Dyment, C. Tisseau, and J. Goslin, Axial magnetic anomalies over slow-spreading ridge segments: insights from numerical 3-D thermal and physical modelling, Geophysical Journal International, vol.154, issue.3, pp.618-632, 2003.
DOI : 10.1046/j.1365-246X.2003.01971.x

URL : https://hal.archives-ouvertes.fr/insu-01309409

P. Gente, Structures obliques sur les flancs de la dorsale Médio- Atlantique: traces fossiles de la propagation le long de l'axe de segments d'accrétion, C. R. Acad. Sci, vol.318, pp.1239-1246, 1994.

P. Gente, 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.55-71, 1995.
DOI : 10.1016/0012-821X(94)00233-O

R. Hey, A new class of ???pseudofaults??? and their bearing on plate tectonics: A propagating rift model, Earth and Planetary Science Letters, vol.37, issue.2, pp.321-325, 1977.
DOI : 10.1016/0012-821X(77)90177-7

R. Hey, F. K. Duennebier, and W. J. Morgan, Propagating rifts on midocean ridges, Journal of Geophysical Research: Solid Earth, vol.60, issue.B7, pp.3647-3658, 1980.
DOI : 10.1029/JB085iB07p03647

E. E. Hooft, R. S. Detrick, D. R. Toomey, J. A. Collins, and J. Lin, Crustal thickness and structure along three contrasting spreading segments of the Mid-Atlantic Ridge, 33, J. geophys. Res, vol.105, pp.5-35, 2000.

E. Irving, The Mid-Atlantic Ridge at 45 ? N, XIV, oxidation and magnetic properties of basalts: review and discussion, Can, J. Earth Sci, vol.7, pp.1528-1538, 1970.

T. Juteau, M. Cannat, and Y. Lagabrielle, Serpentinized peridotites in the upper oceanic crust away from transform zones: a comparison of the results of previous DSDP and ODP legs, Proc. Ocean Drill. Program Sci. Results, pp.106-109, 1990.

D. V. Kent, B. M. Honnores, N. D. Opdyke, and P. J. Fox, Magnetic properties of dredged oceanic gabbros and the source of marine magnetic anomalies, Geophysical Journal International, vol.55, issue.3, pp.513-537, 1978.
DOI : 10.1111/j.1365-246X.1978.tb05925.x

L. S. Kong, S. C. Solomon, and G. M. Purdy, Microearthquake Characteristics of a Mid-Ocean Ridge along-axis high, Journal of Geophysical Research: Solid Earth, vol.159, issue.B2, pp.1659-1685, 1992.
DOI : 10.1029/91JB02566

B. Y. Kuo and D. W. Forsyth, Gravity anomalies of the ridge-transform system in the South Atlantic between 31 and 34.5??? S: Upwelling centers and variations in crustal thickness, Marine Geophysical Researches, vol.85, issue.3-4, pp.205-232, 1988.
DOI : 10.1007/BF00310065

L. Douaran, S. Francheteau, and J. , Axial depth anomalies from 10 to 50?? north along the Mid-Atlantic Ridge: correlation with other mantle properties, Earth and Planetary Science Letters, vol.54, issue.1, pp.29-47, 1981.
DOI : 10.1016/0012-821X(81)90066-2

J. Lin, G. M. Purdy, H. Schouten, J. C. Sempéré, and C. Zervas, Evidence from gravity data for focused magmatic accretion along the Mid-Atlantic Ridge, Nature, vol.344, issue.6267, pp.627-632, 1990.
DOI : 10.1038/344627a0

P. Lonsdale, Geomorphology and structural segmentation of the crest of the southern (Pacific-Antarctic) East Pacific Rise, Journal of Geophysical Research: Solid Earth, vol.93, issue.B3, pp.4683-4702, 1994.
DOI : 10.1029/93JB02756

K. C. Macdonald, J. C. Sempéré, and P. J. Fox, East Pacific Rise from Siquieros to Orozco Fractures Zones: along-strike continuity of axial neovolcanic zone and structure and evolution of overlapping spreading centers, J. geophys. Res, vol.3, pp.211-215, 1984.

K. C. Macdonald, J. C. Sempéré, and P. J. Fox, Reply: The debate concerning overlapping spreading centers and Mid-Ocean Ridge processes, Journal of Geophysical Research, vol.29, issue.B10, pp.10-501, 1986.
DOI : 10.1029/JB091iB10p10501

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. Marshall and A. Cox, Magnetic changes in pillow basalt due to sea floor weathering, Journal of Geophysical Research, vol.20, issue.32, pp.6459-6469, 1972.
DOI : 10.1029/JB077i032p06459

J. E. Pariso and H. P. Johnson, Do lower crustal rocks record reversals of the Earth's magnetic field? Magnetic petrology of oceanic gabbros from Ocean Drilling Program hole 735B, Journal of Geophysical Research, vol.17, issue.B9, pp.16-29, 1993.
DOI : 10.1029/93JB00933

J. Phipps-morgan and D. T. Sandwell, Systematics of ridge propagation south of 30??S, Earth and Planetary Science Letters, vol.121, issue.1-2, pp.245-258, 1994.
DOI : 10.1016/0012-821X(94)90043-4

M. Ravilly, J. Dyment, P. Gente, and R. Thibaud, Axial magnetic anomaly amplitude along the Mid-Atlantic Ridge between 20 ? N and 40 ? N, J. geophys. Res, vol.103, pp.24-201, 1998.

M. Ravilly, Etude de l'anomalie magnétique axiale le long de la ride médio-atlantique : implications sur les processus de l'accrétion et les variations temporelles du champ géomagnétique, Thèse de doctorat, 1999.

J. C. Sempéré, G. M. Purdy, and H. Schouten, Segmentation of the Mid-Atlantic Ridge between 24?? N and 30??40' N, Nature, vol.344, issue.6265, pp.427-431, 1990.
DOI : 10.1038/344427a0

J. C. Sempéré, J. Lin, H. S. Brown, H. Schouten, and G. M. Purdy, Segmentation and morphotectonic variations along a slow-spreading center: the Mid-Atlantic Ridge, Mar. geophys. Res, pp.153-200, 1993.

R. Thibaud, P. Gente, and M. Maia, A systematic analysis of the Mid- Atlantic Ridge morphology and gravity between 15 ? N and 40 ? N: constraints of the thermal structure, J. geophys. Res, vol.103, pp.24-223, 1998.

C. Tisseau and T. Tonnerre, Non Steady-State Thermal Model of Spreading Ridges: Implications for Melt Generation and Mantle Outcrops, Mantle and Lower Crust Exposed in Ridges and Ophiolites, pp.181-214, 1995.
DOI : 10.1007/978-94-015-8585-9_8

M. Tolstoy, A. J. Harding, and J. A. Orcutt, Crustal Thickness on the Mid-Atlantic Ridge: Bull's-Eye Gravity Anomalies and Focused Accretion, Science, vol.262, issue.5134, pp.726-729, 1993.
DOI : 10.1126/science.262.5134.726

D. R. Toomey, S. C. Solomon, G. M. Purdy, and M. H. Murray, Microearthquakes beneath the Median Valley of the Mid-Atlantic Ridge near 23??N: Hypocenters and focal mechanisms, Journal of Geophysical Research, vol.73, issue.B7, pp.5443-5458, 1985.
DOI : 10.1029/JB090iB07p05443

D. R. Toomey, S. C. Solomon, 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.9093-9112, 1988.
DOI : 10.1029/JB093iB08p09093

D. R. Toomey, G. M. Purdy, A. H. Barclay, C. J. Wolfe, and S. C. Solomon, FARA microearthquakes experiments IV: implications of Mid- Atlantic Ridge seismicity for models of young oceanic lithosphere, AGU Fall meeting, p.601, 1993.

D. S. Wilson, R. N. Hey, and C. Nishimura, Propagation as a mechanism of reorientation of the Juan de Fuca Ridge, Journal of Geophysical Research, vol.199, issue.B11, pp.9215-9225, 1984.
DOI : 10.1029/JB089iB11p09215

C. M. Weiland, K. C. Macdonald, and N. R. Grindlay, Ridge segmentation and the magnetic structure of the Southern Mid-Atlantic Ridge 26??S and 31??-35??S: Implications for magmatic processes at slow spreading centers, Journal of Geophysical Research: Solid Earth, vol.97, issue.16, pp.8055-8073, 1996.
DOI : 10.1029/95JB03535

C. J. Wolfe, G. M. Purdy, D. R. Toomey, and S. C. Solomon, Microearthquake characteristics and crustal velocity structure at 29 ? N on the MAR: the architecture of a slow spreading ridge, J. geophys. Res, vol.100, pp.24-449, 1995.