Upper mantle structure beneath the Azores hotspot from finite-frequency seismic tomography

Earth and Planetary Science Letters

Volumn 250, Issue 1-2, 2006, Pages 11-26

  Yang, Ting ^a   Shen, Yang ^a   van der Lee, Suzan ^b   Solomon, Sean C ^c   Hung, Shu Huei ^d  

^a UNIVERSITY OF RHODE ISLAND   (United States)

^b NORTHWESTERN UNIVERSITY   (United States)

^c GEOPHYSICAL LABORATORY   (United States)

^d NATIONAL TAIWAN UNIVERSITY   (Taiwan)

Author keywords

Azores; finite frequency tomography; hotspot; mantle plume; Mid Atlantic Ridge; plume ridge interaction; triple junction

Indexed keywords

FINITE-FREQUENCY TOMOGRAPHY; HOTSPOT; MANTLE PLUME; PLUME-RIDGE INTERACTION; SEISMIC TOMOGRAPHY; TRIPLE JUNCTION;

ACOUSTIC WAVE SCATTERING; ACOUSTIC WAVE VELOCITY; COMPUTER SIMULATION; GEOCHEMISTRY; SEISMIC WAVES; TECTONICS; TOMOGRAPHY; WAVEFRONTS;

SEISMOLOGY;

HOT SPOT; MANTLE PLUME; MANTLE STRUCTURE; MID-OCEAN RIDGE; P-WAVE; SEISMIC TOMOGRAPHY; TELESEISMIC WAVE; TRAVEL TIME; TRIPLE JUNCTION; WAVE SCATTERING; WAVE VELOCITY;

ATLANTIC ISLANDS; ATLANTIC OCEAN; AZORES; EURASIA; EUROPE; MACARONESIA; MID-ATLANTIC RIDGE; PORTUGAL; SOUTHERN EUROPE;

EID: 33748914676     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2006.07.031     Document Type: Article

References (85)

1. Schilling J.-G. Azores mantle blob: rare-earth evidence. Earth Planet. Sci. Lett. 25 (1975) 103-115
2. Schilling J.-G., Zajac M., Evans R., Johnston T., White W., Devine J.D., and Kingsley R. Petrologic and geochemical variations along the Mid-Atlantic Ridge from 29°N to 73°. Am. J. Sci. 283 (1983) 510-586
3. Kingsley R.H., and Schilling J.-G. Carbon in Mid-Atlantic Ridge basalt glasses from 28°N to 63°N: evidence for a carbon-enriched Azores mantle plume. Earth Planet. Sci. Lett. 129 (1995) 31-53
4. Yu D., Fontignie D., and Schilling J.-G. Mantle plume - ridge interactions in the Central North Atlantic: a Nd isotope study of Mid-Atlantic Ridge basalts from 30°N to 50°. Earth Planet. Sci. Lett. 146 (1997) 259-272
5. Moreira M., Doucelance R., Kurz M.D., Dupré B., and Allègre C.J. Helium and lead isotope geochemistry of the Azores archipelago. Earth Planet. Sci. Lett. 169 (1999) 189-205
6. Thibaud R., Gente P., and Maia M. A systematic analysis of the Mid-Atlantic Ridge morphology and gravity between 15°N and 40°N: constraints of the thermal structure. J. Geophys. Res. 103 (1998) 24223-24243
7. 86Sr isotope data. Geophys. J. Int. 135 (1998) 700-710
8. Escartín J., Cannat M., Pouliquen G., Rabain A., and Lin J. Crustal thickness of V-shaped ridges south of the Azores: interaction of the Mid-Atlantic Ridge (36°-39°N) and the Azores hot spot. J. Geophys. Res. 106 (2001) 21719-21735
9. Searle R. Tectonic pattern of the Azores spreading centre and triple junction. Earth Planet. Sci. Lett. 51 (1980) 415-434
10. Freire Luis J., Miranda J.M., Galdeano A., Patriat P., Rossignol J.C., and 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
11. Zhang Y.-S., and Tanimoto T. High-resolution global upper mantle structure and plate tectonics. J. Geophys. Res. 98 (1993) 9793-9823
12. Montelli R., Nolet G., Dahlen F.A., Masters G., Engdahl E.R., and Hung S.-H. Finite-frequency tomography reveals a variety of plumes in the mantle. Science 303 (2004) 338-343
13. Silveira G., Stutzmann E., Griot D.-A., Montagner J.-P., and Mendes Victor L. Anisotropic tomography of the Atlantic Ocean from Rayleigh surface waves. Phys. Earth Planet. Inter. 106 (1998) 257-273
14. Silveira G., and Stutzmann E. Anisotropic tomography of the Atlantic Ocean. Phys. Earth Planet. Inter. 132 (2002) 237-248
15. Marone F., Van der Lee S., and Giardini D. Three-dimensional upper mantle S-velocity model for the Eurasia-Africa plate boundary region. Geophys. J. Int. 158 (2004) 109-130
16. Pilidou S., Priestley K., Gudmundsson Ó., and Debayle E. Upper mantle S-wave speed heterogeneity and anisotropy beneath the North Atlantic from regional surface wave tomography: the Iceland and Azores plumes. Geophys. J. Int. 159 (2004) 1057-1076
17. Nataf H.-C. Seismic imaging of mantle plumes. Annu. Rev. Earth Planet. Sci. 28 (2000) 391-417
18. Wolfe C.J., Bjarnason I.Th., VanDecar J.C., and Solomon S.C. Seismic structure of the Iceland mantle plume. Nature 385 (1997) 245-247
19. Foulger G.R., Pritchard M.J., Julian B.R., Evans J.R., Allen R.M., Nolet G., Morgan W.J., Bergsson B.H., Erlendsson P., Jakobsdottir S., Ragnarsson S., Stefansson R., and Vogfjörd K. Seismic tomography shows that upwelling beneath Iceland is confined to the upper mantle. Geophys. J. Int. 146 (2001) 504-530
20. Allen R.M., Nolet G., Morgan W.J., Vogfjörd K., Bergsson B.H., Erlendsson P., Foulger G.R., Jakobsdóttir S., Julian B.R., Pritchard M., Ragnarsson S., and Stefánsson R. Imaging the mantle beneath Iceland using integrated seismological techniques. J. Geophys. Res. 107 B12 (2002) 2325 10.1019/2001JB000595
21. Hung S.-H., Shen Y., and Chiao L.-Y. Imaging seismic velocity structure beneath the Iceland hot spot: a finite frequency approach. J. Geophys. Res. 109 B8 (2004) B08305 10.1029/2003JB002889
22. Shen Y., and Hung S.-H. Ridge-like upwelling in the uppermost lower mantle beneath eastern Africa from finite-frequency seismic tomography. Eos Trans. Am. Geophys. Union 85 47 (2004) Fall Meeting Suppl., Abstract U41A-0720
23. Silveira G., van der Lee S., Stutzmann E., Matias L., James D., Burkett P., Miranda M., Mendes Victor L., Gaspar J.L., Senos L., Solomon S., Montagner J.-P., and Giardini D. Coordinated seismic experiment in the Azores. ORFEUS Newsl. 4 2 (2002) 10
24. Webb S.C. Broadband seismology and noise under the ocean. Rev. Geophys. 36 (1998) 105-142
25. VanDecar J.C., and Crosson R.S. Determination of teleseismic relative phase arrival times using multi-channel cross-correlation and least squares. Bull. Seismol. Soc. Am. 80 (1990) 150-169
26. Aki K., Christoffersson A., and Husebye E.S. Determination of the three-dimensional seismic structure of the lithosphere. J. Geophys. Res. 82 (1977) 277-296
27. Dziewonski A.M. Mapping the lower mantle: determination of lateral heterogeneity in P velocity up to degree and order 6. J. Geophys. Res. 89 (1984) 5929-5952
28. Grand S.P. Mantle shear structure beneath the Americas and surrounding oceans. J. Geophys. Res. 99 (1994) 11591-11621
29. Van der Hilst R.D., Widiyantoro S., and Engdahl E.R. Evidence for deep mantle circulation from global tomography. Nature 386 (1997) 578-584
30. Zhao D. Seismic structure and origin of hotspots and mantle plumes. Earth Planet. Sci. Lett. 192 (2001) 251-265
31. Nolet G., and Dahlen F.A. Wave front healing and the evolution of seismic delay times. J. Geophys. Res. 105 (2000) 19043-19054
32. Hung S.-H., Dahlen F.A., and Nolet G. Wavefront healing: a banana-doughnut perspective. Geophys. J. Int. 146 (2001) 289-312
33. Baig A.M., Dahlen F.A., and Hung S.-H. Traveltimes of waves in three-dimensional random media. Geophys. J. Int. 153 (2003) 467-482
34. Marquering H., Dahlen F.A., and Nolet G. Three-dimensional sensitivity kernels for finite-frequency traveltimes: the banana-doughnut paradox. Geophys. J. Int. 137 (1999) 805-815
35. Dahlen F.A., Hung S.-H., and Nolet G. Fréchet kernels for finite frequency traveltimes: I. Theory. Geophys. J. Int. 141 (2000) 157-174
36. Zhao L., Jordan T.H., and Chapman C.H. Three-dimensional Fréchet differential kernels for seismic delay times. Geophys. J. Int. 141 (2000) 558-576
37. Yang H.-Y., and Hung S.-H. Validation of ray and wave theoretical travel times in heterogeneous random media. Geophys. Res. Lett. 32 (2005) L20302 10.1029/2005GL023501
38. Hung S.-H., Dahlen F.A., and Nolet G. Fréchet kernels for finite-frequency traveltimes: II. Examples. Geophys. J. Int. 141 (2000) 175-203
39. Chiao L.-Y., and Kuo B.-Y. Multiscale seismic tomography. Geophys. J. Int. 145 (2001) 517-527
40. Paige C.C., and Saunders M.A. LSQR: an algorithm for sparse linear equations and sparse least squares. ACM Trans. Math. Softw. 8 (1982) 43-71
41. Menke W. Geophysical Data Analysis: Discrete Inverse Theory. rev. ed. (1989), Academic Press, San Diego, Calif. 285 pp.
42. Keller W.R., Anderson D.L., and Clayton R.W. Resolution of tomographic models of the mantle beneath Iceland. Geophys. Res. Lett. 27 (2000) 3993-3996
43. Wolfe C.J., Bjarnason I.Th., VanDecar J.C., and Solomon S.C. Assessing the depth resolution of tomographic models of upper mantle structure beneath Iceland. Geophys. Res. Lett. 29 (2002) 1015 10.1029/20001GL013657
44. Marone F., van der Meijde M., van der Lee S., and Giardini D. Joint inversion of local, regional and teleseismic data for crustal thickness in the Eurasia-Africa plate boundary region. Geophys. J. Int. 154 (2003) 499-514
45. Louden K.E., Tucholke B.E., and Oakey G.N. Regional anomalies of sediment thickness, basement depth and isostatic crustal thickness in the North Atlantic Ocean. Earth Planet. Sci. Lett. 224 (2004) 193-211
46. Feraud G., Kaneoka I., and Allègre C.J. K/Ar ages and stress pattern in the Azores: geodynamic implications. Earth Planet. Sci. Lett. 46 (1980) 275-286
47. Madeira J., and Ribeiro A. Geodynamic models for the Azores triple junction: a contribution from tectonics. Tectonophysics 184 (1990) 405-415
48. Shen Y., Solomon S.C., Bjarnason I.Th., and Wolfe C.J. Seismic evidence for a lower-mantle origin of the Iceland plume. Nature 395 (1998) 62-65
49. Li X., Kind R., Priestley K., Sobolev S.V., Tilmann F., Yuan X., and Weber M. Mapping the Hawaiian plume conduit with converted seismic waves. Nature 405 (2000) 938-941
50. Li X., Kind R., and Yuan X. Seismic study of upper mantle and transition zone beneath hotspots. Phys. Earth Planet. Inter. 136 (2003) 79-92
51. Richards M.A., and Griffiths R.W. Deflection of plumes by mantle shear flow: experimental results and a simple theory. Geophys. J. 94 (1988) 367-376
52. Steinberger B., and O'Connell R.J. Effects of mantle flow on hotspot motion. In: Richards M.A., Gordon R.G., and van der Hilst R.D. (Eds). The History and Dynamics of Global Plate Motions, Geophysical Monograph Series vol. 121 (2000), Am. Geophys. Union, Washington, DC 377-398
53. Gripp A.E., and Gordon R.G. Young tracks of hotspots and current plate velocities. Geophys. J. Int. 150 (2002) 321-361
54. Behn M.D., Conrad C.P., and Silver P.G. Detection of upper mantle flow associated with the African Superplume. Earth Planet. Sci. Lett. 224 (2004) 259-274
55. Madureira P., Moreira M., Mata J., and Allègre C.J. Primitive neon isotopes in Terceira Island (Azores archipelago). Earth Planet. Sci. Lett. 233 (2005) 429-440
56. Bourdon B., Turner S.P., and Ribe N.M. Partial melting and upwelling rates beneath the Azores from a U-series isotope perspective. Earth Planet. Sci. Lett. 239 (2005) 42-56
57. Kurz M.D., Moreira M., Curtice J., Lott III D.E., Mahoney J.J., and Sinton J.M. Correlated helium, neon, and melt production on the super-fast spreading East Pacific Rise near 17°S. Earth Planet. Sci. Lett. 232 (2005) 125-142
58. Kingsley R.H., Schilling J.-G., Dixon J.E., Swart P., Poreda R., and Simons K. D/H ratios in basalt glasses from the Salas y Gomez mantle plume interacting with the East Pacific Rise: water from old D-rich recycled crust or primordial water from the lower mantle?. Geochem. Geophys. Geosyst. 3 4 (2002) 1025 10.1029/2001GC000199
59. Hall P.S., and Kincaid C. Melting, dehydration, and the geochemistry of off-axis plume-ridge interaction. Geochem. Geophys. Geosyst. 5 (2004) Q12E18 10.1029/2003GC000667
60. Schilling J.-G. Fluxes and excess temperature of mantle plumes inferred from their interaction with migrating mid-ocean ridges. Nature 352 (1991) 397-403
61. Kincaid C., Ito G., and Gable C. Laboratory investigation of the interaction of off-axis mantle plumes and spreading centres. Nature 376 (1995) 758-761
62. Kincaid C., Schilling J.-G., and Gable C. The dynamics of off-axis plume-ridge interaction in the uppermost mantle. Earth Planet. Sci. Lett. 137 (1996) 29-43
63. Hall P.S., and Kincaid C. Melting, dehydration, and the dynamics of off-axis plume-ridge interaction. Geochem. Geophys. Geosyst. 4 9 (2003) 8510 10.1029/2003GC000567
64. Schilling J.-G., Sigurdsson H., Davis A.N., and Hey R.N. Easter microplate evolution. Nature 317 (1985) 325-331
65. Ribe N.M. The dynamics of plume-ridge interaction, 2. Off-ridge plumes. J. Geophys. Res. 101 (1996) 16195-16204
66. Ito G., Lin J., and Graham D. Observational and theoretical studies of the dynamics of mantle plume-mid-ocean ridge interaction. Rev. Geophys. 41 4 (2003) 1017 10.1029/2002RG000117
67. White W.M., and Schilling J.-G. The nature and origin of geochemical variation in Mid-Atlantic Ridge basalts from the Central North Atlantic. Geochim. Cosmochim. Acta 42 (1978) 1501-1516
68. Chase C.G. Asthenospheric counterflow: a kinematic model. Geophys. J. R. Astron. Soc. 56 (1979) 1-18
69. Goslin J., and Triatnord Scientific Party. Extent of Azores plume influence on the Mid-Atlantic Ridge north of the hotspot. Geology 27 (1999) 991-994
70. Krause D.C., and Watkins N.D. North Atlantic crustal genesis in the vicinity of the Azores. Geophys. J. R. Astron. Soc. 19 (1970) 261-283
71. McKenzie D. Active tectonics of the Mediterranean region. Geophys. J. R. Astron. Soc. 30 (1972) 109-185
72. Schilling J.-G., Kingsley R.H., and Devine J.D. Galapagos hot spot-spreading center system, 1. Spatial petrological and geochemical variations (83°W-101°W). J. Geophys. Res. 87 (1982) 5593-5610
73. Small C. Observations of ridge-hotspot interactions in the Southern Ocean. J. Geophys. Res. 100 (1995) 17931-17946
74. Helgason J. Shifts of the plate boundary in Iceland: some aspects of Tertiary volcanism. J. Geophys. Res. 90 (1985) 10084-10092
75. Hardarson B.S., Fitton J.G., Ellam R.M., and Pringle M.S. Rift relocation - a geochemical and geochronological investigation of a paleo-rift in northwest Iceland. Earth Planet. Sci. Lett. 153 (1997) 181-196
76. Allen R.M., and Tromp J. Resolution of regional seismic models: squeezing the Iceland anomaly. Geophys. J. Int. 161 (2005) 373-386
77. Karato S. Mapping water content in the upper mantle. In: Eiler J. (Ed). Inside the Subduction Factory, Geophysical Monograph Series vol. 138 (2003), Am. Geophys. Union, Washington, DC 135-152
78. Gung Y., and Romanowicz B. Q tomography of the upper mantle using three-component long-period waveforms. Geophys. J. Int. 157 (2004) 813-830
79. Wysession M.E., and Lawrence J.F. Imaging the East Asian lower mantle water anomaly. Eos Trans. Am. Geophys. Union 86 52 (2005) Fall Meeting Suppl., Abstract MR44A-06
80. Asimow P.D., and Langmuir C.H. The importance of water to oceanic mantle melting regimes. Nature 421 (2003) 815-820
81. Lambeck K., and Johnston P. The viscosity of the mantle: evidence from analyses of glacial-rebound phenomena. In: Jackson I. (Ed). The Earth's Mantle: Composition, Structure, and Evolution (1998), Cambridge University Press, Cambridge 461-502
82. Olson P., Schubert G., and Anderson C. Structure of axisymmetric mantle plumes. J. Geophys. Res. 98 (1993) 6829-6844
83. Korenaga J. Firm mantle plumes and the nature of the core-mantle boundary region. Earth Planet. Sci. Lett. 232 (2005) 29-37
84. Sleep N.H. Hotspots and mantle plumes: some phenomenology. J. Geophys. Res. 95 (1990) 6715-6736
85. Kennett B.L.N., and Engdahl E.R. Traveltimes for global earthquake location and phase identification. Geophys. J. Int. 105 (1991) 429-465