Anomalous opening of the Equatorial Atlantic due to an equatorial mantle thermal minimum

Earth and Planetary Science Letters

Volumn 143, Issue 1-4, 1996, Pages 147-160

  Bonatti, Enrico ^a,b  

^a CNR   (Italy)

^b Lamont Doherty Earth Observatory of Columbia University   (United States)

Author keywords

Continental drift; Fracture zones; Mid Atlantic Ridge

Indexed keywords

CONTINENTAL DRIFT; FRACTURE ZONE; FRACTURE ZONES; MANTLE; MID OCEAN RIDGE; MID-OCEAN RIDGES; TECTONIC EVOLUTION; THERMAL MINIMUM; TRANSFORM FAULT;

ATLANTIC, MID-ATLANTIC RIDGE;

EID: 0030435614     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/0012-821x(96)00125-2     Document Type: Article

References (67)

1. E. Bullard, J.E. Everett, A.G. Smith, The fit of the continents around the Atlantic, Philos. Trans. R. Soc. 258, 41-50, 1965.
2. W.J. Morgan, Hot spot tracks and the opening of the Atlantic and Indian Oceans, in: The Sea, C. Emiliani, ed., vol. 7, pp. 443-487, Wiley, New York, NY, 1981.
3. P.J. Fox and D.G. Gallo, A tectonic model for ridge-transform-ridge plate boundaries, Tectonics 104, 205-242, 1984.
4. W.F. Haxby, Gravity field of the world's oceans, NOAA/National Geophysics Data Center, Boulder, CO, 1987; D.T. Sandwell and W.H. Smith, Global marine gravity from ERS-1, GEOSAT and SEASAT reveals new tectonic fabric, EOS 73, 133, 1992.
5. W.F. Haxby, Gravity field of the world's oceans, NOAA/National Geophysics Data Center, Boulder, CO, 1987; D.T. Sandwell and W.H. Smith, Global marine gravity from ERS-1, GEOSAT and SEASAT reveals new tectonic fabric, EOS 73, 133, 1992.
6. J. Mascle and E. Blarez, Evidence for transform margin evolution from the Cote d'Ivoire-Ghana continental margin, Nature 326, 378-381, 1987.
7. R. Van Der Voo and R.B. French, Apparent polar wandering for the Atlantic bordering continents: Late Carboniferous to Eocene, Earth Sci. Rev. 10, 99-119, 1974; P. Morel and E. Irving, Paleomagnetism and the evolution of Pangea, J. Geophys. Res. 86, 1858-1872, 1981.
8. R. Van Der Voo and R.B. French, Apparent polar wandering for the Atlantic bordering continents: Late Carboniferous to Eocene, Earth Sci. Rev. 10, 99-119, 1974; P. Morel and E. Irving, Paleomagnetism and the evolution of Pangea, J. Geophys. Res. 86, 1858-1872, 1981.
9. E. Bonatti, M. Seyler and N. Sushevskaya, A cold suboceanic mantle belt at the Earth's equator, Science 261, 315-320, 1993.
10. E. Bonatti, Not so hot "hot spots" in the oceanic mantle, Science 250, 107-111, 1990.
11. E.M. Klein and C.H. Langmuir, Global correlations of ocean ridge basalt chemistry with axial depth and crustal chemistry, J. Geophys. Res. 92, 8089-8115, 1987.
12. J.G. Schilling, B.B. Hanan, B. McCully and R.H. Kingsley, Influence of the Sierra Leone mantle plume on the equatorial Mid Atlantic Ridge: Nd-Sr-Pb isotopic study, J. Geophys. Res. 99, 12005-12028, 1994; J.G. Schilling, C. Ruppel, A.N. Davis, B. McCully, J.A. Tighe, R.H. Kingsley and J. Lin, Thermal structure of the mantle beneath the equatorial Mid Atlantic Ridge: inferences from the spatial variation of dredged basalt glass composition, J. Geophys. Res. 100, 10057-10076, 1995.
13. J.G. Schilling, B.B. Hanan, B. McCully and R.H. Kingsley, Influence of the Sierra Leone mantle plume on the equatorial Mid Atlantic Ridge: Nd-Sr-Pb isotopic study, J. Geophys. Res. 99, 12005-12028, 1994; J.G. Schilling, C. Ruppel, A.N. Davis, B. McCully, J.A. Tighe, R.H. Kingsley and J. Lin, Thermal structure of the mantle beneath the equatorial Mid Atlantic Ridge: inferences from the spatial variation of dredged basalt glass composition, J. Geophys. Res. 100, 10057-10076, 1995.
14. Y.S. Zhang and T. Tanimoto, Global Love wave phase velocity variation and its significance to plate tectonics, Phys. Earth Planet. Inter. 66, 160-202, 1991; Y.S. Zhang and T. Tanimoto, High resolution global upper mantle structure and plate tectonics, J. Geophys. Res. 98, 9793-9823, 1992; Y.S. Zhang and T. Tanimoto, Ridges, hotspots and their interaction as observed in seismic velocity maps, Nature 235, 45-49, 1992.
15. Y.S. Zhang and T. Tanimoto, Global Love wave phase velocity variation and its significance to plate tectonics, Phys. Earth Planet. Inter. 66, 160-202, 1991; Y.S. Zhang and T. Tanimoto, High resolution global upper mantle structure and plate tectonics, J. Geophys. Res. 98, 9793-9823, 1992; Y.S. Zhang and T. Tanimoto, Ridges, hotspots and their interaction as observed in seismic velocity maps, Nature 235, 45-49, 1992.
16. Y.S. Zhang and T. Tanimoto, Global Love wave phase velocity variation and its significance to plate tectonics, Phys. Earth Planet. Inter. 66, 160-202, 1991; Y.S. Zhang and T. Tanimoto, High resolution global upper mantle structure and plate tectonics, J. Geophys. Res. 98, 9793-9823, 1992; Y.S. Zhang and T. Tanimoto, Ridges, hotspots and their interaction as observed in seismic velocity maps, Nature 235, 45-49, 1992.
17. X. Yang and K.M. Fischer, Constraints on north Atlantic upper mantle anisotropy from S and SS phases, Geophys. Res. Lett. 21, 309-312, 1994.
18. B.Y. Kuo, D.W. Forsyth and M. Wysession, Lateral heterogeneity and azimuthal anisotropy in the north Atlantic determined from SS-S differential travel times, J. Geophys. Res. 92, 6421-6436, 1987.
19. D.S. Chapman and H.N. Pollack, Cold spot in west Africa: anchoring the African plate, Nature 250, 477-479, 1974.
20. J.D. Fairhead and C.V. Reeves, Teleseismic delay times, Bouguer anomalies and inferred thickness of the African lithosphere, Earth Planet. Sei Lett. 36, 63-76, 1977.
21. S.T. Crough and G.A. Thompson, Thermal model of continental lithosphere, J. Geophys. Res. 81, 4857-4862, 1976.
22. K. Burke, T.F. Dessauvagie and A.J. Whiteman, Opening of the Gulf of Guinea and geological history of the Benue depression and Niger delta, Nature 233, 51-55, 1971.
23. K. Burke and J.F. Dewey, Two plates in Africa during the Cretaceous?, Nature 249, 313-316, 1974.
24. J. Benkhelil, The origin and evolution of the Cretaceous Benue Trough (Nigeria), J. African Earth Sci. 8, 251-282, 1989.
25. J.D. Fairhead and R.M. Binks, Differential opening of the west African rift system, Tectonophysics 187, 191-203, 1991.
26. R.M. Binks and J.D. Fairhead, A plate tectonic setting for Mesozoic rifts of West and Central Africa, Tectonophysics 213, 141-151, 1992.
27. J. Pindell and J.F. Dewey, Permo-Triassic reconstruction of western Pangea and evolution of the Gulf of Mexico/Caribbean region. Tectonics 1, 179-211, 1982; E. Uchupi, The tectonic style of the Atlantic Mesozoic rift system, J. African Earth Sci. 8, 143-164, 1989.
28. J. Pindell and J.F. Dewey, Permo-Triassic reconstruction of western Pangea and evolution of the Gulf of Mexico/Caribbean region. Tectonics 1, 179-211, 1982; E. Uchupi, The tectonic style of the Atlantic Mesozoic rift system, J. African Earth Sci. 8, 143-164, 1989.
29. D.F. Neev, J.K. Hall and J.M. Saul, The Pelusium megashear system across Africa and associated lineaments swarms, J. Geophys. Res. 87, 1015-1030, 1982.
30. K.V. Burke and J. Lytwyn, Origin of the rift under the Amazon basin as a result of continental collision during Pan-African time, Int. Geol. Rev. 35, 881-897, 1993.
31. S.C. Cande, J.L. LaBrecque and W.F. Haxby, Plate kinematics of the South Atlantic: chron C34 to present, J. Geophys. Res. 93, 13479-13492, 1988;
32. P.D. Rabinowitz and J. LaBrecque, The Mesozoic South Atlantic Ocean and the evolution of its continental margins, J. Geophys. Res. 84, 5973-6002, 1979;
33. D. Nurberg and R.D. Muller, The tectonic evolution of the South Atlantic from Late Jurassic to present, Tectonophysics, 191, 27-55, 1991;
34. R.L. Larson and J.W. Ladd, Evidence for opening of the South Atlantic in the early Cretaceous, Nature 246, 209-212, 1973.
35. G. Ranalli, Regional variations in lithosphere rheology from heat flow observations, in: Exploration of the Deep Continental Crust, V. Cermak and L. Ryback, eds., pp. 1-22, Springer, Berlin, 1991; S. Karato and P. Wu, Rheology of the upper mantle: a synthesis, Science 260, 771-778, 1993.
36. G. Ranalli, Regional variations in lithosphere rheology from heat flow observations, in: Exploration of the Deep Continental Crust, V. Cermak and L. Ryback, eds., pp. 1-22, Springer, Berlin, 1991; S. Karato and P. Wu, Rheology of the upper mantle: a synthesis, Science 260, 771-778, 1993.
37. J.R. Hopper and R. Buck, The initation of rifting at constant tectonic force: role of diffusion creep, J. Geophys. Res. 98, 16213-16221, 1993.
38. T. Spohn and G. Schubert, Convective thinning of the lithosphere: a mechanism for the initiation of continental rifting, J. Geophys. Res. 87, 4669-4681, 1982; T. Spohn and G. Schubert, Convective thinning of the lithosphere: a mechanism for rifting and mid plate volcanism on Earth, Venus and Mars, Tectonophysics, 94, 67-90, 1983; G.F. Davies, Thermomechanical erosion of the lithosphere by mantle plumes, J. Geophys. Res. 99, 15709-15722, 1994.
39. T. Spohn and G. Schubert, Convective thinning of the lithosphere: a mechanism for the initiation of continental rifting, J. Geophys. Res. 87, 4669-4681, 1982; T. Spohn and G. Schubert, Convective thinning of the lithosphere: a mechanism for rifting and mid plate volcanism on Earth, Venus and Mars, Tectonophysics, 94, 67-90, 1983; G.F. Davies, Thermomechanical erosion of the lithosphere by mantle plumes, J. Geophys. Res. 99, 15709-15722, 1994.
40. T. Spohn and G. Schubert, Convective thinning of the lithosphere: a mechanism for the initiation of continental rifting, J. Geophys. Res. 87, 4669-4681, 1982; T. Spohn and G. Schubert, Convective thinning of the lithosphere: a mechanism for rifting and mid plate volcanism on Earth, Venus and Mars, Tectonophysics, 94, 67-90, 1983; G.F. Davies, Thermomechanical erosion of the lithosphere by mantle plumes, J. Geophys. Res. 99, 15709-15722, 1994.
41. V. Courtillot, Propagating rifts and continental break up, Tectonics 1, 239-250, 1982.
42. S. Watson and D. McKenzie, Melt generation by plumes: a study of Hawaiian volcanism, J. Petrology 32, 501-537, 1991.
43. E. Bonatti, Punctiform initiation of sea-floor spreading in the Red Sea during transition from a continental to an oceanic rift, Nature 316, 33-37, 1985.
44. M.S. Steckler, The role of the thermal-mechanical structure of the lithosphere in the formation of sedimentary basins, in: Quantitative Dynamic Stratigraphy, T.A. Cross ed., Prentice Hall, 89-112, 1989.
45. J. Phipps-Morgan and E.M. Parmentier, Causes and rate limiting mechanisms of ridge propagation: a fracture mechanics model, J. Geophys. Res. 90, 8603-8612, 1985.
46. M. Wilson, Magmatism and continental rifting during the opening of the South Atlantic Ocean: a consequence of Lower Cretaceous super-plume activity? in: Magmatism and the Causes of Continental Break-up, B.C. Storey, T. Alabaster and RJ. Pankhurst, eds., Geol. Soc. London Spec. Publ. 68, 241-255, 1992.
47. R.I. Hill, Starting plumes and continental break up, Earth Planet. Sci. Lett. 104, 398-416, 1991.
48. E. Bonatti, M. Ligi, N. Turko, G. Carrara, L. Gasperini, S. Perfiliev. A. Peyve and P.F. Sciuto, Diffuse impact of the Mid Atlantic Ridge in the Romanche transform: an ultracold ridge-transform intersection, J. Geophys. Res. 101, 8043-8054, 1996.
49. E. Bonatti, M. Ligi, L. Gasperini, A. Peyve, Y. Rasnitsin and Y. J. Chen, Transform migration and vertical tectonics at the Romanche fracture zone, equatorial Atlantic, J. Geophys. Res. 99, 21779-21802, 1994; E. Bonatti, M. Sarnthein, A. Boersma, M. Gorini and J. Honnorez, Neogene crustal emersion and subsidence at the Romanche fracture zone, equatorial Atlantic, Earth Planet Sci. Lett. 35, 369-383, 1979; E. Bonatti, E.R. Sartori and A. Boersma, Vertical crustal movements at the Vema fracture zone in the Atlantic: evidence from dredged limestones, Tectonophysics 91, 213-232, 1983.
50. E. Bonatti, M. Ligi, L. Gasperini, A. Peyve, Y. Rasnitsin and Y. J. Chen, Transform migration and vertical tectonics at the Romanche fracture zone, equatorial Atlantic, J. Geophys. Res. 99, 21779-21802, 1994; E. Bonatti, M. Sarnthein, A. Boersma, M. Gorini and J. Honnorez, Neogene crustal emersion and subsidence at the Romanche fracture zone, equatorial Atlantic, Earth Planet Sci. Lett. 35, 369-383, 1979; E. Bonatti, E.R. Sartori and A. Boersma, Vertical crustal movements at the Vema fracture zone in the Atlantic: evidence from dredged limestones, Tectonophysics 91, 213-232, 1983.
51. E. Bonatti, M. Ligi, L. Gasperini, A. Peyve, Y. Rasnitsin and Y. J. Chen, Transform migration and vertical tectonics at the Romanche fracture zone, equatorial Atlantic, J. Geophys. Res. 99, 21779-21802, 1994; E. Bonatti, M. Sarnthein, A. Boersma, M. Gorini and J. Honnorez, Neogene crustal emersion and subsidence at the Romanche fracture zone, equatorial Atlantic, Earth Planet Sci. Lett. 35, 369-383, 1979; E. Bonatti, E.R. Sartori and A. Boersma, Vertical crustal movements at the Vema fracture zone in the Atlantic: evidence from dredged limestones, Tectonophysics 91, 213-232, 1983.
52. E. Bonatti and K. Crane, Oscillatory spreading explanation of anomalously old uplifted crust near oceanic transforms, Nature 300, 343-345, 1982.
53. E. Bonatti, M. Ligi, A.M. Borsetti, L. Gasperini, A. Negri and R. Sartori, Lower Cretaceous deposits trapped near the equatorial Mid Atlantic Ridge, Nature 380, 518-520, 1996.
54. E. Bonatti, Subcontinental mantle exposed in the Atlantic Ocean on St. Paul islet, Nature 345, 800-802, 1990.
55. M.K. Roden, S.R. Hart, F.A. Frey and W.G. Melson, Sr, Nd and Pb isotopic and REE geochemistry of St. Paul's rocks: the metamorphic and metasomatic development of an alkali basalt mantle source, Contrib. Mineral. Petrol. 85, 376-390, 1984.
56. J.K. Weissel and D.E. Hayes, The Australian/Antarctic discordance: new results and implication, J. Geophys. Res. 79, 2579-2587, 1974; D.W. Forsyth, L.K. Ehrenbard and S. Chapin, Anomalous upper mantle beneath the Australian-Antarctic discordance, Earth Planet. Sci. Lett. 84, 471-478, 1987; E.M. Klein, C.H. Langmuir, A. Zindler, H. Staudigel and B. Hamelin, Isotopic evidence of a mantle convection boundary at the Australian-Antarctic Discordence, Nature 333, 623-629, 1988; K.M. Marks, D.T. Sandwell. P.R. Vogt and S.A. Hall, Mantle downwelling beneath the Australian/Antarctic discordance: evidence from geoid height versus topography, Earth Planet. Sci. Lett. 103, 325-338, 1991.
57. J.K. Weissel and D.E. Hayes, The Australian/Antarctic discordance: new results and implication, J. Geophys. Res. 79, 2579-2587, 1974; D.W. Forsyth, L.K. Ehrenbard and S. Chapin, Anomalous upper mantle beneath the Australian-Antarctic discordance, Earth Planet. Sci. Lett. 84, 471-478, 1987; E.M. Klein, C.H. Langmuir, A. Zindler, H. Staudigel and B. Hamelin, Isotopic evidence of a mantle convection boundary at the Australian-Antarctic Discordence, Nature 333, 623-629, 1988; K.M. Marks, D.T. Sandwell. P.R. Vogt and S.A. Hall, Mantle downwelling beneath the Australian/Antarctic discordance: evidence from geoid height versus topography, Earth Planet. Sci. Lett. 103, 325-338, 1991.
58. J.K. Weissel and D.E. Hayes, The Australian/Antarctic discordance: new results and implication, J. Geophys. Res. 79, 2579-2587, 1974; D.W. Forsyth, L.K. Ehrenbard and S. Chapin, Anomalous upper mantle beneath the Australian-Antarctic discordance, Earth Planet. Sci. Lett. 84, 471-478, 1987; E.M. Klein, C.H. Langmuir, A. Zindler, H. Staudigel and B. Hamelin, Isotopic evidence of a mantle convection boundary at the Australian-Antarctic Discordence, Nature 333, 623-629, 1988; K.M. Marks, D.T. Sandwell. P.R. Vogt and S.A. Hall, Mantle downwelling beneath the Australian/Antarctic discordance: evidence from geoid height versus topography, Earth Planet. Sci. Lett. 103, 325-338, 1991.
59. J.K. Weissel and D.E. Hayes, The Australian/Antarctic discordance: new results and implication, J. Geophys. Res. 79, 2579-2587, 1974; D.W. Forsyth, L.K. Ehrenbard and S. Chapin, Anomalous upper mantle beneath the Australian-Antarctic discordance, Earth Planet. Sci. Lett. 84, 471-478, 1987; E.M. Klein, C.H. Langmuir, A. Zindler, H. Staudigel and B. Hamelin, Isotopic evidence of a mantle convection boundary at the Australian-Antarctic Discordence, Nature 333, 623-629, 1988; K.M. Marks, D.T. Sandwell. P.R. Vogt and S.A. Hall, Mantle downwelling beneath the Australian/Antarctic discordance: evidence from geoid height versus topography, Earth Planet. Sci. Lett. 103, 325-338, 1991.
60. R.A. Scrutton, Crustal structure and development of sheared passive continental margins, in: Dynamics of Passive Margins, R.A. Scrutton, ed., Geodyn. Ser. 6, 133-140, 1982.
61. J.L. Olivet, X. LePichon, S. Monti and B. Sichler, Charlie-Gibbs fracture zone, J. Geophys. Res. 79, 2950-2072, 1974.
62. E. Bonatti, Long lived oceanic transform boundaries formed above mantle thermal minima, Geology, in press, 1996.
63. H.W. Menard and L.M. Dorman, Dependence of depth anomalies upon latitude and plate motion, J. Geophys. Res. 82, 5329-5335, 1977.
64. P. Goldreich and A. Toomre, Some remarks on polar wandering, J. Geophys. Res. 74, 2555-2567, 1969.
65. D.L. Anderson, Theory of the Earth, Blackwell, Boston, MA, 366 pp., 1989; D.L. Anderson, Hotspots, polar wander, Mesozoic convection and the geoid, Nature 297, 391-394, 1982.
66. D.L. Anderson, Theory of the Earth, Blackwell, Boston, MA, 366 pp., 1989; D.L. Anderson, Hotspots, polar wander, Mesozoic convection and the geoid, Nature 297, 391-394, 1982.
67. G. Spada, Y. Ricard and R. Sabadini, Excitation of true polar wander by subduction, Nature 360, 452-454, 1992.