Mid-Atlantic Ridge-Azores hotspot interactions: Along-axis migration of a hotspot-derived event of enhanced magmatism 10 to 4 Ma ago

Earth and Planetary Science Letters

Volumn 173, Issue 3, 1999, Pages 257-269

  Cannat, Mathilde ^a   Briais, Anne ^b   Deplus, Christine ^c   Escartín, Javier ^a,d   Georgen, Jennifer ^e   Lin, Jian ^e   Mercouriev, Serguei ^f   Meyzen, Christine ^g   Muller, Mark ^a   Pouliquen, Gaud ^c   Rabain, Aline ^a   Da Silva, Pedro ^h  

^a SORBONNE UNIVERSITÉ   (France)

^b GRGS/CNRS   (France)

^c CNRS   (France)

^d INSTITUTE OF EARTH SCIENCES JAUME ALMERA   (Spain)

^e WOODS HOLE OCEANOGRAPHIC INSTITUTION   (United States)

^f RUSSIAN ACADEMY OF SCIENCES   (Russian Federation)

^g CRPG CNRS   (France)

^h UNIVERSITY OF LISBON   (Portugal)

Author keywords

Azores; Hot spots; Mantle; Mid ocean ridges

Indexed keywords

HOT SPOT; MAGMATISM; MANTLE PLUME; MID-OCEAN RIDGE; MIOCENE; VOLCANISM;

ATLANTIC OCEAN; AZORES;

EID: 0033619596     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0012-821X(99)00234-4     Document Type: Article

References (42)

1. Detrick R.S., Needham H.D., Renard V. Gravity anomalies and crustal thickness variations along the Mid-Atlantic Ridge between 33°N and 40°N. J. Geophys. Res. 100:1995;3767-3787.
2. Thibaud R., Gente P., Maia M. A systematic analysis of the Mid-Atlantic Ridge morphology and gravity between 15°N and 40°N: constraints on the thermal structure. J. Geophys. Res. 103:1998;24223-24243.
3. Vogt P.R. Plumes, subaxial pipe flow, and topography along the mid-oceanic ridge. Earth Planet. Sci. Lett. 29:1976;309-325.
4. Schilling J.-G. Upper mantle heterogeneities and dynamics. Nature. 314:1985;62-67.
5. Schilling J.-G. Fluxes and excess temperatures of mantle plumes inferred from their interaction with migrating mid-ocean ridges. Nature. 352:1991;397-403.
6. Feighner M.A., Richards M.A. The fluid dynamics of plume-ridge and plume-plate interactions: an experimental investigation. Earth Planet. Sci. Lett. 129:1995;171-182.
7. Ito G., Lin J. Oceanic spreading center-hotspot interactions: constraints from along-isochron bathymetric and gravity anomalies. Geology. 23:1995;657-660.
8. Ribe N.M., Christensen U.R., Theissing J. The dynamics of plume-ridge interaction, 1: ridge-centered plumes. Earth Planet. Sci. Lett. 134:1995;155-168.
9. Kincaid C., Schilling J.G., Gable C. The dynamics of off-axis plume-ridge interactions in the uppermost mantle. Earth Planet. Sci. Lett. 137:1996;29-43.
10. Zhang Y.-S., Tanimoto T. Ridges, hotspots and their interaction as observed in seismic velocity maps. Nature. 355:1992;45-49.
11. D.T. Sandwell, W.H.F. Smith, Marine Gravity Anomaly from Satellite Altimetry, map Geological Data Center, Scripps Institution of Oceanography, 1995.
12. Needham H.D., Voisset M., Renard V., Bougault H., Dauteuil O., Detrick R., Langmuir C. Structural and volcanic features of the Mid-Atlantic Rift Zone between 40°N and 33°N (abstract). Eos. 73:1991;552.
13. Searle R.C. Tectonic patterns of the Azores spreading center and triple junction. Earth Planet. Sci. Lett. 51:1980;415-434.
14. Madeira J., Ribeiro A. Geodynamic models for the Azores triple junction: a contribution from tectonics. Tectonophysics. 184:1990;405-415.
15. Féraud G., Kaneoka I., Allègre C.J. K/Ar ages and stress pattern in the Azores: geodynamic implications. Earth Planet. Sci. Lett. 46:1980;275-286.
16. Campan A., Royer J.-Y., Gente P., Olivet J.-L., Muller R.D. Evolution of the Azores-Gibraltar plate boundary for the last 36 Ma (abstract). Eos. 74:1993;586.
17. Freire Luis J., Miranda J.M., Galdeano A., Patriat P., Rossignol J.-C., Mendes Victor L.A. The Azores triple junction evolution since 10 Ma from an aeromagnetic survey of the Mid-Atlantic Ridge. Earth Planet. Sci. Lett. 125:1994;439-459.
18. Vogt P.R. Global magmatic episodes: new evidence and implications for the steady-state mid-oceanic ridge. Geology. 7:1979;93-98.
19. DeMets C.R., Gordon R.G., Argus D.F., Stein S. Current plate motions. Geophys. J. Int. 101:1990;425-478.
20. Sloan H., Patriat P. Kinematics of the North American-African plate boundary between 28 and 29°N during the last 10 Ma: evolution of the axial geometry and spreading rate and direction. Earth Planet. Sci. Lett. 113:1992;323-341.
21. Pouliquen G., Escartín J., Cannat M., Briais A., Deplus C., Georgen J., Lin J., Merkouriev S., Meyzin C., Muller M., Rabain A., da Silva P. Reconstruction of a rifted volcanic plateau in the FAMOUS-Lucky Strike region of the Mid-Atlantic Ridge (abstract). Eos. 79:1998;856.
22. Gripp A.E., Gordon R.G. Current plate velocities relative to the hotspots incorporating the NUVEL-1 global plate motion model. Geophys. Res. Lett. 17:1990;1109-1112.
23. Müller R.D., Royer J.-Y., Lawver L.A. Revised plate motions relative to the hotspots from combined Atlantic and Indian Ocean hotspot tracks. Geology. 21:1993;275-278.
24. Cande S.C., Kent D.V. Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic. J. Geophys. Res. 100:1995;6093-6095.
25. Parker R.L. The rapid calculation of potential anomalies. J. Geophys. Res. 31:1973;447-455.
26. Phipps Morgan J., Forsyth D.W. 3-D flow and temperature perturbations due to a transform offset: effects on oceanic crustal and upper mantle structure. J. Geophys. Res. 93:1988;2955-2966.
27. Parker R.L., Huestis S.P. The inversion of magnetic anomalies in the presence of topography. J. Geophys. Res. 79:1974;1587-1593.
28. Parsons B., Sclater J.G. An analysis of the variation of ocean floor bathymetry and heat flow with age. J. Geophys. Res. 82:1977;803-827.
29. Johansen B., Vogt P.R., Eldholm O. Reykjanes Ridge: further analysis of crustal subsidence and time-transgressive basement topography. Earth Planet. Sci. Lett. 68:1984;249-258.
30. White R.S., Bown J.W., Smallwood J.R. The temperature of the Iceland plume and origin of outward-propagating V-shaped ridges. J. Geol. Soc. London. 152:1995;1039-1045.
31. Klein E.M., Langmuir C.H. Global correlations of ocean ridge basalt chemistry with axial depth and crustal thickness. J. Geophys. Res. 92:1987;8089-8115.
32. Bonatti E. Not so hot 'hot spots' in the oceanic mantle. Science. 250:1990;107-111.
33. 2O-undersaturated conditions. Earth Planet. Sci. Lett. 19:1973;37-45.
34. Mysen B.O., Kushiro I. Compositional variations of coexisting phases with degree of melting of peridotite in the upper mantle. Am. Mineral. 62:1977;843-865.
35. McKenzie D. The generation and compaction of partially molten rock. J. Petrol. 25:1984;713-765.
36. Vogt P.R. Asthenosphere motion recorded by the ocean floor south of Iceland. Earth Planet. Sci. Lett. 13:1971;153-160.
37. D.W. Forsyth, Geophysical constraints on mantle flow and melt generation beneath mid-ocean ridges, in: J. Phipps Morgan et al. (Eds.), Mantle Flow and Melt Generation at Mid-Ocean Ridges, Am. Geophys. Union, Geophys. Monogr. 71 (1992) 1-66.
38. Campbell I.H., Griffiths R.W., Hill R.I. Melting in an Archean mantle plume: heads its basalts, tails its komatiites. Nature. 339:1989;697-699.
39. Olson P., Schubert G., Anderson C., Goldman P. Plume formation and lithosphere erosion: a comparison of laboratory and numerical experiments. J. Geophys. Res. 93:1988;15065-15084.
40. Sleep N.H. Lateral flow of hot plume material ponded at sublithospheric depths. J. Geophys. Res. 101:1996;28065-28083.
41. Yale M.M., Phipps Morgan J. Asthenosphere flow model of hotspot-ridge interactions: a comparison of Iceland and Kerguelen. Earth Planet. Sci. Lett. 161:1998;45-56.
42. Wessel P., Smith W.H.F. Free software helps map and display data. Eos. 72:1991;445-446.