First seamount age evidence for significantly slower African plate motion since 19 to 30 Ma

Earth and Planetary Science Letters

Volumn 171, Issue 4, 1999, Pages 575-589

  O'Connor, J M ^a   Stoffers, P ^a   Van Den Bogaard, P ^b   McWilliams, M ^c  

^a UNIVERSITY OF KIEL   (Germany)

^b GEOMAR HELMHOLTZ CENTRE FOR OCEAN RESEARCH KIEL   (Germany)

^c STANFORD UNIVERSITY   (United States)

Author keywords

Absolute age; Africa; Ar 40 Ar 39; Atlantic Ocean; Hotspot; Plume

Indexed keywords

ARGON-ARGON DATING; HOT SPOT; MANTLE PLUME; PLATE MOTION; SEAMOUNT;

ATLANTIC OCEAN;

EID: 0033618948     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0012-821X(99)00183-1     Document Type: Article

References (50)

1. Morgan W.J. Convection plumes in the lower mantle. Nature. 230:1971;42-43.
2. Schilling J.-G., Thompson G., Kingsley R., Humphris S. Hotspot-migrating ridge interaction in the South Atlantic. Nature. 313:1985;187-191.
3. Hanan B.B., Kingsley R.H., Schilling J.-G. Pb isotope evidence in the South Atlantic for migrating ridge-hotspot interactions. Nature. 322:1986;137-144.
4. Graham D.W., Jenkins W.J., Schilling J.-G., Thompson G., Kurz M.D., Humphris S.E. Evidence from geoid data of a hotspot origin for the southern Mascarene Plateau and Mascarene helium isotope geochemistry of mid-ocean ridge basalts from the South Atlantic. Earth Planet. Sci. Lett. 110:1992;133-147.
5. Schilling J.-G., Hanan B.B., McCully B., Kingsley R.H., Fontignie D. Influence of the Sierra Leone Mantle plume on the equatorial Mid-Atlantic Ridge: A Nd-Sr-Pb isotopic study. J. Geophys. Res. 99:1994;12005-12028.
6. Douglass J., Schilling J.-G., Kingsley R.H., Small C. Influence of the Discovery and Shona mantle plumes on the southern Mid-Atlantic Ridge: Rare earth evidence. J. Geophys. Res. 22:1995;2893-2896.
7. Fontignie D., Schilling J.-G. Mantle heterogeneities beneath the South Atlantic: a Nd-Sr-Pb isotope study along the Mid-Atlantic Ridge (3°S-46°S). Earth Planet. Sci. Lett. 142:1996;209-221.
8. Morgan W.J. Plate motions and deep mantle convection. Geol. Soc. Am., Mem. 132:1972;1-7.
9. W.J. Morgan, Hot-spot tracks and the opening of the Atlantic and Indian Oceans, in: The Sea, Wiley Interscience, New York, 1981, pp. 443-488.
10. Duncan R.A. Hotspots in the Southern Oceans. An absolute frame of reference of motion of the Gondwana continents. Tectonophysics. 74:1981;29-42.
11. O'Connor J.M., Duncan R.A. Evolution of the Walvis Ridge-Rio Grande Rise hot spot-system: Implications for African and South American plate motions over plumes. J. Geophys. Res. 95:1990;17475-17502.
12. O'Connor J.M., le Roex A.P. South Atlantic hot spot-plume systems: 1. Distribution of volcanism in time and space. Earth Planet. Sci. Lett. 113:1992;343-364.
13. Fleitout L., Dalloubeix C., Moriceau C. Small-wavelength geoid and topography anomalies in the South Atlantic Ocean: A clue to new hot-spot tracks and lithospheric deformation. Geophys. Res. Lett. 16:1989;637-640.
14. Müller R.D., Royer J.-Y., Lawver L.A. Revised plate motions relative to the hotspots from combined Atlantic and Indian Ocean hotpot tracks. Geology. 21:1993;275-278.
15. Smith W.H.F., Sandwell D.T. Global seafloor topography from satellite altimetry and ship depth soundings. Science. 277:1997;4199-4212.
16. Zindler A., Hart S. Chemical geodynamics. Annu. Rev. Earth Planet. Sci. 14:1986;493-571.
17. Schilling J.-G. Fluxes and excess temperatures of mantle plumes inferred from their interaction with migrating mid-ocean ridges. Nature. 352:1991;397-403.
18. Burk K., Wilson J.T. Is the African plate stationary. Nature. 239:1972;387-389.
19. Baker I., Gale N.H., Simons J. Geochronology of the St. Helena volcanoes. Nature. 215:1967;1451-1456.
20. Baker I. Petrology of the volcanic rocks of Saint Helena Island, South Atlantic. Geol. Soc. Am. Bull. 80:1969;1283-1310.
21. D.J. Chaffey, R.A. Cliff, B.M. Wilson, Characterization of the St. Helena Magma Source, in: A.D. Saunders, M.J. Nory, (Eds.), Magmatism in the Ocean Basins, Geol. Soc. London Spec. Publ. 42 (1989) 257-276.
22. Cande S.C., LaBrecque J.L., Haxby W.B. Plate kinematics of the South Atlantic: Chron 34 to present. J. Geophys. Res. 93:1988;13479-13492.
23. Cande S.C., Kent D.V. A new geomagnetic time scale for the late Cretaceous and Cenozoic. J. Geophys. Res. 97:1992;13917-13951.
24. C.W. Devey and scientific party, Cruise report SO-84: The St. Helena hotspot, 64, Dept. of Geology and Paleontology, Christian-Albrechts Univ., Kiel, 1993.
25. O'Connor J.M., Stoffers P., Wijbrans J.R. Migration rate of volcanism along the Foundation Chain, SE Pacific. Earth Planet. Sci. Lett. 164:1998;41-59.
26. G. Wefer, H.D. Schulz, F. Schott, H.B. Hirschleber, Atlantik 91-Expedition, 92-2, University of Hamburg, 1991, 288 pp.
27. 39Ar dating of Oligocene rhyolites from the Mongollon-Datil Volcanic Field, using a continuous laser system. Geophys. Res. Lett. 14:1988;462-464.
28. G. Fauer, Principles of Isotope Geology, 2nd ed., Wiley, New York, 1986.
29. 39Ar age spectra: Implications for Precambrian plate tectonics. Annu. Rev. Earth Planet. Sci. 12:1984;383-409.
30. 39Ar method, Oxford University Press, Oxford, 1988.
31. 39Ar technique of K-Ar dating: A comparison with the conventional technique. Earth Planet. Sci. Lett. 12:1971;300-308.
32. H.D. Young, Statistical Treatment of Experimental Data, 88, McGraw-Hill, New York, 1962, pp. 5101-5112.
33. York D. Least-squares fitting of a straight line with correlated errors. Earth Planet. Sci. Lett. 5:1969;320-324.
34. Wendt I., Carl C. The statistical distribution of the mean squared weighted deviation. Chem. Geol. 86:1991;275-285.
35. O'Connor J.M., Stoffers P., McWilliams M.O. Time-space mapping of Easter Chain volcanism. Earth Planet. Sci. Lett. 136:1995;197-212.
36. Wijbrans J.R., Pringle M.S., Koppers A.A.P., Scheveers R. Argon geochronology of small samples using the Vulkaan argon laserprobe. Proc. K. Ned. Akad. Wetensch. 98:1995;185-218.
37. Brozena J.M., White R.S. Ridge jumps and propagations in the South Atlantic ocean. Nature. 348:1990;149-152.
38. Silver P.G., Russo R.M., Lithgow-Bertelloni C. Coupling of South American and African plate motion and plate deformation. Science. 279:1998;60-63.
39. Le Roex A.P. Geochemistry, mineralogy and magmatic evolution of the basaltic and trachytic lavas from Gough Island, South Atlantic. J. Petrol. 26:1985;149-186.
40. McDougall I., Ollier C.D. Potassium argon ages from Tristan da Cunha, South Atlantic. Geol. Mag. 119:1982;87-93.
41. Renne P.R., Glenn J.M., Milner S.C., Duncan A.R. Age of Etendeka flood volcanism and associated intrusions in southwestern Africa. Geology. 24:1996;659-662.
42. Sempere T., Herail G., Oller J., Bonhomme M.G. Late Oligocene-early Miocene major tectonic crisis and related basins in Bolivia. Geology. 18:1990;946-949.
43. Russo R.M., Silver P.G. Cordillera formation, mantle dynamics, and the Wilson cycle. Geology. 24:1996;511-514.
44. H.-U. Schmincke, P.P.E. Weaver, J.V. Firth, Shipboard Scientific Party, Background, objectives, and principal results of drilling the clastic apron of Gran Canaria (VICAP), Proc. ODP. Init. Rept. 157, Ocean Drilling Program, College Station, TX, 1995.
45. Courtney R.C., White R.S. Anomalous heat flow and geoid across the Cape Verde Rise: evidence for dynamic support from a thermal plume in the mantle. Geophys. J.R. Astr. Soc. 87:1986;815-867.
46. Kempe D., Schilling J.-G. Discovery Tablemount basalt: Petrology and geochemistry. Contrib. Mineral. Petrol. 44:1974;101-115.
47. Müller R.D., Roest and W.R., Royer J.-Y. Asymmetric sea-floor spreading caused by ridge-plume interactions. Nature. 396:1998;455-459.
48. D.L. Anderson, Y.-S. Zhang, T. Tanimoto, Plume heads, continental lithosphere, flood basalts and tomography, in: B.C. Storey, T. Alabaster, R.J. Pankhurst (Eds.), Magmatism and the Causes of Continental Break-up, Geol. Soc. Spec. Publ. 68 (1992) 99-124.
49. McNutt M.K., Caress D.W., Reynolds J., Jordahl K.A., Duncan R.A. Failure of plume theory to explain midplate volcanism in the southern Austral Islands. Nature. 389:1997;479-482.
50. Phipps Morgan J., Morgan W.J., Zhang Y.-S., Smith W.H.F. Observational hints for a plume-fed suboceanic asthenosphere and its role in mantle convection. J. Geophys. Res. 100:1995;12753-12767.