The isostatic compensation of the Azores Plateau: A 3D admittance and coherence analysis

Journal of Volcanology and Geothermal Research

Volumn 156, Issue 1-2, 2006, Pages 10-22

  Luis, J F ^a   Neves, M C ^a  

^a UNIVERSITY OF ALGARVE   (Portugal)

Author keywords

admittance; Azores swell; geoid interpretation; gravity; isostasy

Indexed keywords

BATHYMETRY; BUOYANCY; COMPUTATIONAL METHODS; ELASTICITY; GRAVITATION; LITHOLOGY; MATHEMATICAL MODELS; VOLCANIC ROCKS;

BUOYANCY FORCES; ELASTIC PLATE; FLEXURAL ISOSTATIC MODEL; GEOID INTERPRETATION; LITHOSPHERE; PLATEAU;

VOLCANOES;

BATHYMETRY; BOUGUER ANOMALY; GEOID; GRAVITY ANOMALY; ISOSTASY;

ATLANTIC ISLANDS; ATLANTIC OCEAN; AZORES; EURASIA; EUROPE; MACARONESIA; PORTUGAL; SOUTHERN EUROPE;

EID: 33745890239     PISSN: 03770273     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jvolgeores.2006.03.010     Document Type: Article

References (55)

1. Asimow P.D., and Langmuir C.H. The importance of water to oceanic mantle melting regimes. Nature 421 (2003) 815-820
2. Banks R., Parker R., and Huestis S. Isostatic compensation on a continental scale: local versus regional mechanisms. Geophys. J. R. Astron. Soc. 51 (1977) 431-452
3. Bendat J.S., and Piersol A.G. Random Data Analysis and Measurement Procedures. 3rd edition (2000), John Wiley
4. Bercovici D., Ricard Y., and Richards M. The relation between mantle dynamics and plate tectonics: a primer. The History and Dynamics of Global Plate Motions. Geophysical Monograph vol. 21 (2000), AGU
5. Bonatti E. Not so hot "hot spots" in the oceanic mantle. Science 250 (1990) 107-110
6. Cannat M., Briais A., Deplus C., Escartin J., Georgen J., Lin J., Mercuriev S., Meyzen C., Muller M., Pouliquen C., Rabain A., and Silva P. Mid-Atlantic Ridge-Azores hotspot interactions: along-axis migration of a hotspot-derived event of enhanced magmatism 10 to 4 Ma ago. Earth Planet. Sci. Lett. 173 (1999) 257-269
7. Cazenave A., Dominh K., Rabinowicx M., and Ceuleneer G. Geoid and depth anomalies over ocean swells and troughs: evidence of increased trend of geoid age ratio with plate age. J. Geophys. Res. 93 (1988) 8064-8077
8. Dorman L.M., and Lewis B.T.R. Experimental isostasy, 1, theory of the determination of the earth's isostatic response to a concentrated load. J. Geophys. Res. 75 (1970) 3357-3375
9. Féraud G., Kaneoka I., and Allègre J.C. K/Ar ages and stress pattern in the Azores: geodynamic implications. Earth Planet. Sci. Lett. 46 (1980) 275-286
10. Forsyth D.W. Can the strength of the lithosphere be inferred from the average relationship between the topography and gravity anomalies. EOS Trans., AGU 62 (1981) 1032 (abstract)
11. Forsyth D.W. Subsurface loading and estimates of the flexural rigidity of continental lithoshere. J. Geophys. Res. 90 (1985) 12623-12632
12. Gente P., Dyment J., Maia M., and Goslin J. Interactions between the MAR and the Azores hot spot during the last 85 Myr: emplacement and rifting of the hot spot-derived plateaus. G-cube 4 (2003) 1-23
13. Grevemeyer I. Isostatic geoid anomalies over mid-plate swells in the Central North Atlantic. Geodynamics 28 (1999) 41-50
14. Grevemeyer I., and Flueh E.R. Crustal underplating and its implications for subsidence and state of isostasy along the Ninetyeast Ridge hotspot trail. Geophys. J. Int. 142 (2000) 643-649
15. Grevemeyer I., Flueh E.R., Reichert C., Bialas J., Klaschen D., and Kopp C. Crustal architecture and deep structure of the Ninetyeast Ridge hotspot trail from active-source ocean bottom seismology. Geophys. J. Int. 144 (2001) 414-431
16. Heller D.-A., and Marquart G. An admittance study of the Reykjanes Ridge and elevated plateaux between the Charlie-Gibbs and Senja fracture zones. Geophys. J. Int. 148 (2002) 65-76
17. Hirn A., Haessler H., Hoang Tronc P., Wittlinger G., and Mendes Victor L.A. Aftershock sequence of the January 1, 1980, earthquake and present-day tectonics in the Azores. Geophys. Res. Lett. 7 (1980) 501-504
18. Ito G., and Clift P.D. Subsidence and growth of Pacific Cretaceous plateaus. Earth Planet. Sci. Lett. 161 (1998) 85-100
19. Ito G., and Lin J. Oceanic spreading center-hotspot interactions: constraints from along-isochron bathymetric and gravity anomalies. Geology 23 (1995) 657-660
20. Karner G.D., and Watts A.B. Gravity anomalies and flexure of the lithosphere at mountain ranges. J. Geophys. Res. 88 (1983) 10449-10477
21. Klitgord K.D., and Schouten H. Plate kinematics of the Central Atlantic. In: Vogt P.O., and Tucholke B.E. (Eds). The Geology of the North America, the Western North Atlantic Region. Vol. M (1986), Geol. Soc. Am., Boulder, Colorado 351-378
22. Kuo B.-Y., and Forsyth D. Gravity anomalies of the ridge-transform system in the South Atlantic between 31° and 34.5°S: upwelling centers and variations in crustal thickness. Mar. Geophys. Res. 10 (1988) 205-232
23. Lemoine F.G., Kenyon S.C., Factor J.K., Trimmer R.G., Pavlis N.K., Chinn D.S., Cox C.M., Klosko S.M., Luthcke S.B., Torrence M.H., Wang Y.M., Williamson R.G., Pavalis E.C., Rapp R.H., and Olsen T.R. The development of the joint NASA GSFC and the National Imagery and Mapping Agency (NIMA) geopotential model EGM96. Report no. NASA/TP-1998-206861 (1998), National Aeronautics and Space Administration
24. Louden K.E. A comparison of the isostatic response of bathymetric features in the north Pacific Ocean and the Philippine Sea. J. Geophys. Res. 64 (1981) 393-424
25. Lourenço N., Luis J.F., Miranda J.M., Ribeiro A., and Mendes Victor L.A. Morpho-tectonic analysis of the Azores Volcanic Plateau from a new bathymetric compilation of the area. Mar. Geophys. Res. 20 (1988) 141-156
26. Luis J.F., Miranda J.M., Galdeano A., Patriat P., Rossignol J.C., and Victor L.A. The Azores triple junction evolution since 10 Ma from aeromagnetic survey of the Mid-Atlantic Ridge. Earth Planet. Sci. Lett. 125 (1994) 439-459
27. Luis J.F., Miranda J.M., Galdeano A., and Patriat P. Constraints on the structure of the Azores spreading center from gravity data. Mar. Geophys. Res. 20 (1998) 156-170
28. Maia M., and Arkani-Hamed J. The support mechanism of the young Foundation Seamounts inferred from bathymetry and gravity. Geophys. J. Int. 149 (2002) 190-210
29. McKenzie D., and Bowin C. The relationship between bathymetry and gravity in the Atlantic Ocean. J. Geophys. Res. 81 (1976) 1903-1915
30. McNutt M. Compensation of oceanic topography, an application of the response function technique to the Surveyor area. J. Geophys. Res. 84 (1979) 7589-7598
31. McNutt M. Influence of plate subduction on isostatic compensation in northern California. Tectonics 2 (1983) 399-415
32. Miranda J.M., Mendes Victor L.A., Simões J.Z., Luis J.F., Matias L., Shimamura H., Shiobara H., Nemoto H., Mochizuki H., Hirn A., and Lépine J.C. Tectonic setting of the Azores Plateau deduced from a OBS survey. Mar. Geophys. Res. 20 (1988) 171-182
33. Monnereau M., and Cazenave A. Depth and geoid anomalies over oceanic hotspot swells. A global survey. J. Geophys. Res. 95 (1990) 15429-15438
34. Morgan W.J. Convection plumes in the lower mantle. Nature 230 (1971) 42-43
35. Muller R.D., Roest W.R., Royer J.-Y., Gahagan L.M., and Sclater J.G. Digital isochrons of the world's ocean floor. J. Geophys. Res. 102 (1997) 3211-3214
36. Neumann G.A., and Forsyth D.W. The paradox of the axial profile: Isostatic compensation along the axis of the Mid-Atlantic Ridge?. J. Geophys. Res. 98 (1993) 17891-17910
37. Ockendon J.R., and Turcotte D.L. On the gravitational potential and field anomalies due to thin mass layers. Geophys. J. R. Astron. Soc. 48 (1977) 479-492
38. Parker R.L. The rapid calculation of potential anomalies. Geophys. J. R. Astron. Soc. 31 (1972) 447-455
39. Sandwell D.T., and MacKenzie K.R. Geoid height versus topography for oceanic plateaus and swells. J. Geophys. Res. 94 (1988) 7403-7418
40. Sandwell D.T., and Renkin M.L. Compensation of swells and plateaus in the North Pacific: no direct evidence for mantle convection. J. Geophys. Res. 93 (1988) 2775-2783
41. Sandwell D., and Smith W. Marine gravity anomaly from Geosat and ERS-1 satellite altimetry. J. Geophys. Res. 102 (1997) 10039-10054
42. Sartoni R., Torelli L., Zitellini N., Peis D., and Lodolo E. Eastern segment of the Azores-Gibraltar line (central-eastern Atlantic): an oceanic plate boundary with diffuse compressional deformation. Geology 22 (1994) 555-558
43. Searle R. Lithospheric Structure of the Azores Plateau from Rayleigh-wave dispersion. Geophys. J. R. Astron. Soc. 44 (1976) 537-546
44. Scheirer D.S., Forsyth D.W., Conder J.A., Eberle M.A., Hung S.H., Jonhson K.T.M., and Graham D.W. Anomalous seafloor spreading of the southeast Indian ridge near the Amsterdam-St. Paul plateau. J. Geophys. Res. 105 (2000) 8243-8262
45. Schilling J. Azores mantle blob: rare-earth evidence. Earth Planet. Sci. Lett. 25 (1975) 103-115
46. Schilling J. Fluxes and excess temperatures of mantle plumes inferred from their interaction with migrating mid-ocean ridges. Nature 352 (1991) 397-403
47. Sclater J.G., Lawer L.A., and Parsons B. Comparison of long-wavelength residual elevation and free-air gravity anomalies in the North Atlantic and possible implications for the thickness of the lithospheric plate. J. Geophys. Res. 80 (1975) 1031-1052
48. Smith W.H.F., and Sandwell D.T. Bathymetric prediction from dense satellite altimetry and sparse shipboard bathymetry. J. Geophys. Res. 99 (1994) 21803-21824
49. Smith W.H.F., and Sandwell D.T. Global seafloor topography from satellite altimetry and ship depth soundings. Science 277 (1997) 1956-1962
50. Srivastava S.P., and Tapscott C.R. Plate kinematics of the North Atlantic. In: Vogt P.O., and Tucholke B.E. (Eds). The Geology of the North America, the Western North Atlantic Region. Vol. M (1986), Geol. Soc. Am., Boulder, Colorado 379-404
51. Turcotte, D., Schubert, G., 2002. Geodynamics. Second ed. Cambridge University Press, pp. 456.
52. Watts A. An analysis of isostasy in the world's oceans 1. Hawaiian-Emperor Seamount Chain. J. Geophys. Res. 83 (1978) 5989-6004
53. Wilson T. Mantle plumes and plate motions. Tectonophysics 19 (1963) 149-164
54. White W., Schilling J., and Hart S. Evidence for the Azores mantle plume from strontium isotope geochemistry of the Central North Atlantic. Nature 263 (1976) 659-663
55. Zhang Y.-S., and Tanimoto T. High-resolution global upper mantle structure and plate tectonics. J. Geophys. Res. 98 (1993) 9793-9823