Isostasy of Africa

Earth and Planetary Science Letters

Volumn 137, Issue 1-4, 1996, Pages 1-18

  Hartley, R ^a   Watts, A B ^a   Fairhead, J D ^b  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b Kitson House   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

BOUGUER ANOMALY; HEAT FLOW; ISOSTASY; TOPOGRAPHY;

AFRICA;

EID: 0029752519     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/0012-821x(95)00185-f     Document Type: Article

References (53)

1. J. Barrell, The strength of the Earth's crust. Part IV. Heterogeneity and rigidity of the crust as measured by departures from isostasy, J. Geol. 23, 289-314, 1914.
2. G.D. Karner and A.B. Watts, Gravity anomalies and flexure of the lithosphere at mountain ranges, J. Geophys. Res. 88, 10,449-10,477, 1983.
3. L. Royden, The tectonic expression of slab pull at convergent plate boundaries, Tectonics 12, 303-325, 1993.
4. H. Lyon-Caen and P. Molnar, Constraints on the structure of the Himalaya from an analysis of gravity anomalies and a flexural model of the lithosphere, J. Geophys. Res. 88, 8171-8191, 1983.
5. L.M. Dorman and B.T.R. Lewis, Experimental isostasy 1: Theory of determinenation of the Earth's response to a concentrated load, J. Geophys. Res. 75, 3357-3365, 1970.
6. B.T.R. Lewis and L.M. Dorman, Experimental Isostasy 2: An isostatic model for the U.S.A. derived from gravity and topographic data, J. Geophys. Res. 75, 3367-3386, 1970.
7. M. McNutt and R.L. Parker, Isostasy in Australia and the evolution of the compensation mechanism, Science 199, 773-775, 1978.
8. T.D. Bechtel, D.W. Forsyth, V.L. Sharpton and R.A.F. Grieve, Variations in effective elastic thickness of the North American lithosphere, Nature 343, 636-638, 1990.
9. N. Ussami, N. Cogo de Sa and E.C. Molina, Gravity map of Brazil.2. Regional and residual isostatic anomalies and their correlation with major tectonic provinces, J. Geophys. Res. 98, 2199-2208, 1993.
10. M. Kogan, J.D. Fairhead, G. Balmino and E.L. Makedonskii, Tectonic fabric and lithospheric strength of northern Eurasia based on gravity data, Geophys. Res, Lett. 21, 2653-2656, 1994.
11. C. Beaumont, Foreland basins, Geophys, J.R. Astron. Soc. 65, 291-329, 1981.
12. G.D. Karner, M.S. Sleekler and J. Thome, Long-term mechanical properties of the continental lithosphere, Nature 304, 250-253, 1983.
13. S.D. Willett, D.S. Chapman and H.J. Neugebauer. A thermo-mechanical model of continental lithosphere, Nature 314, 520-523, 1985.
14. K. Burke and J.F. Dewey, Plume-generated triple junctions: Key indicators in applying plate tectonics to old rocks, J. Geol. 81, 406-433, 1973.
15. R. White and D. McKenzie, Magmatism at rift zones: the generation of volcanic continental margins and flood basalts, J. Geophys. Res. 94, 7685-7729, 1989.
16. K.G. Cox, A model for flood basalt volcanism, J. Petrol. 21, 629-650, 1980.
17. D. Fairhead, The seismicity of the East African rift system, Tectonophysics 15, 115-122, 1971.
18. J.K. Weissel and G.D. Karner, Flexural uplift of rift flanks due to mechanical unloading of the lithosphere during extension, J. Geophys. Res. 94, 13,919-13,950, 1989.
19. R.J. Banks and C.J. Swain, The isostatic compensation of East Africa, Proc. R. Soc. London 364, 331-352, 1978.
20. D.W. Forsyth, Subsurface loading and estimates of the flexural rigidity of continental lithosphere, J. Geophys. Res. 90, 12,623-12,632, 1985.
21. C.J. Ebinger, T.D. Bechtel, D.W. Forsyth and C.O. Bowin, Effective elastic plate thickness beneath the East African and Afar plateaux and dynamic dompensation of uplifts, J. Geophys. Res. 94, 2883-2901, 1989.
22. S.T. Crough, The Darfur swell, Africa: Gravity constraints on its isostatic compensation, Geophys. Res. Lett. 8, 877-879, 1981.
23. S.T. Crough, Free-air gravity over the Hoggar Massif, Northwest Africa: Evidence for alteration of the lithosphere, 77, 189-202, 1981.
24. P.M. Bermingham, J.D. Fairhead and G.W. Stuart, Gravity study of the Central African Rift System: A model of continental disruption 2. The Darfur demal uplift and associated Cainozoic volcanism, Tectonophysics 94, 205-222, 1983.
25. Y.H. Poudjom-Djomani, M. Diament and Y. Albouy, Mechanical behaviour of the lithosphere beneath the Adamawa uplift (Cameroon, West Africa) based on gravity data, J. Afr. Earth Sci. 15(1), 81-90, 1992.
26. A. Holmes, Principles of Physical Geology, 1288 pp., Nelson, London, 1965.
27. S.T. Crough, Hotspot swells, Annu. Rev. Earth Planet. Sci. 11, 165-193, 1983.
28. R. Thiessen, K. Burke and W.S.F. Kidd, African hotspots and their relation to the underlying mantle, Geology 7, 263-266, 1979.
29. N. Pavoni, Pattern of mantle convection and Pangaea breakup, as revealed by the evolution of the African plate, J. Geol. Soc. London 150, 953-964, 1993.
30. K. Burke and J.T. Wilson, Is the African plate stationary?, Nature 239, 387-390, 1972.
31. G.C. Bond, Evidence for some uplifts of large magnitude in continental platforms, Tectonophysics 61, 285-305, 1979.
32. J.D. Fairhead, A.B. Watts, P. Chevalier, B. El-Haddeh, C.M. Green, G.W. Stuart, K.A. Whaler and I. Windle, African Gravity Project, GETECH Dep. Earth Sci., Univ. Leeds, 1988.
33. P. Wessel and A.B. Watts, On the accuracy of marine gravity measurements, J. Geophys. Res. 93, 393-413, 1988.
34. W.H. Munk and D.E. Cartwright, Tidal spectroscopy and prediction, J. Geophys. Res. 259, 533-581, 1966.
35. M.T. Zuber, T.D. Bechtel and D.W. Forsyth, Effective elastic thickness of the lithosphere and mechanisms of isostatic compensation in Australia, J. Geophys. Res. 94, 13,919-13,930, 1989.
36. M.K. McNutt and M. Kogan, Isostasy in the USSR II: Interpretation of admittance data, in: Composition, Structure, Dynamics of the Lithosphere-Asthenosphere System, K. Fuchs and C. Froidevaux, eds., pp. 309-327, Geodyn. Ser. 16, Am. Geophys. Union, Washington, DC, 1987.
37. R.J. Banks, R.L. Parker and S.P. Huestis, Isostatic Compensation on a continental scale: local versus regional mechanisms, Geophys. J.R. Astron. Soc. 51, 431-452, 1977.
38. M. McNutt, Compensation of oceanic topography: An application of the response function technique to the Surveyor area, J. Geophys. Res. 84, 7589-7598, 1979.
39. R. Stephenson and C. Beaumont, Small-scale convection in the upper mantle and isostatic response of the Canadian shield, in: Mechanisms of Continental Drift and Plate Tectonics, S.K. Runcorn, ed., pp. 111-122, NATO Adv. Study Inst./Academic, London, 1980.
40. M.K. McNutt and R.L. Parker, Isostasy in Australia and the evolution of the compensation mechanism, Science 199, 773-775, 1978.
41. M. Kogan and M. McNutt, Isostasy in the USSR I: Admittance data, in: Composition, Structure, Dynamics of the Lithosphere-Asthenosphere System, K. Fuchs and C. Froidevaux, eds., pp. 301-308, Geodyn. Ser. 16, Am. Geophys. Union, Washington, DC, 1987.
42. R.I. Walcott, Lithospheric flexure, analysis of gravity anomalies, and the propagation of seamount chains, Am. Geophys. Union Geophys. Monogr. 19, 431-438, 1976.
43. B. Sheffels and M. McNutt, Role of subsurface loads and regional compensation in the isostatic balance of the Transverse Ranges, California: Evidence for intracontinental subduction, J. Geophys. Res. 91, 6419-6431, 1986.
44. R.I. Walcott, Isostatic response to loading of the crust in Canada, Can. J. Earth Sci. 7, 716-727, 1970.
45. R. Hartley, Isostasy of Africa: Implications for the thermomechanical behaviour of the continental lithosphere, Ph.D thesis, Univ. Oxford, Oxford, 1995.
46. A.B. Watts, An analysis of isostasy in the world's oceans: 1. Hawaiian-Emperor seamount chain, J. Geophys. Res. 83, 5989-6004, 1978.
47. A.B. Watts, The effective elastic thickness of the lithosphere and the evolution of foreland basins, Basin Res. 4, 169-178, 1992.
48. B. Pinet, C. Jaupart, J.-C. Mareschal, G. Gariepy, G. Bienfait and R. Lapointe, Heat flow and structure of the lithosphere in the eastern Canadian shield, J. Geophys. Res. 96, 19,941-19,963, 1991.
49. A. Lesquer, D. Takherist, J.M. Dautria and O. Hadiouche, Geophysical and petrological evidence for the presence of an "anomalous" upper mantle beneath the Sahara basins (Algeria), Earth Planet. Sc. Lett. 96, 407-418, 1990.
50. D.P. McKenzie, The relationship between topography and gravity on Earth and Venus, Icarus 112, 55-88, 1994.
51. P. Wessel and W.H.F. Smith, Free software helps map and display data, EOS 72, 441-446, 1991.
52. D.S. Chapman and H.N. Pollack, Heat flow and incipient rifting in the Central African Plateau, Nature 256, 28-30, 1975.
53. S. Ballard and H.N. Pollack, Diversion of heat by Archean cratons: a model for southern Africa, Earth Planet. Sc. Lett. 85, 253-264, 1987.