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Dziewonski AM, Forte AM, Su W, Woodward RL. Seismic Tomography and Geodynamics. RELATING GEOPHYSICAL STRUCTURES AND PROCESSES: THE JEFFREYS VOLUME 2013. [DOI: 10.1029/gm076p0067] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Aspherical Structure of the Mantle, Tectonic Plate Motions, Nonhydrostatic Geoid, and Topography of the Core-Mantle Boundary. ACTA ACUST UNITED AC 2013. [DOI: 10.1029/gm072p0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Lateral Variations in Lower Mantle Seismic Velocity. ACTA ACUST UNITED AC 2013. [DOI: 10.1029/gm067p0197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Woodward RL, Forte AM, Su WJ, Dziewonski AM. Constraints on the Large-Scale Structure of the Earth's Mantle. EVOLUTION OF THE EARTH AND PLANETS 2013. [DOI: 10.1029/gm074p0089] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Tanimoto T, Stevenson DJ. Seismic constraints on a model of partial melts under ridge axes. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/93jb03402] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Vasco DW, Johnson LR, Pulliam RJ, Earle PS. Robust inversion of IASP91 travel time residuals for mantle P and S velocity structure, earthquake mislocations, and station corrections. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/93jb02023] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ricard Y, Vigny C, Froidevaux C. Mantle heterogeneities, geoid, and plate motion: A Monte Carlo inversion. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jb094ib10p13739] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Vasco DW, Johnson LR, Pulliam J. Lateral variations in mantle velocity structure and discontinuities determined fromP,PP,S,SS, andSS-SdStravel time residuals. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/95jb00150] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shearer PM. Imaging global body wave phases by stacking long-period seismograms. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/91jb00421] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Revenaugh J, Jordan TH. Mantle layering fromScSreverberations: 2. The transition zone. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/91jb01486] [Citation(s) in RCA: 210] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Anderson DL. Thermally induced phase changes, lateral heterogeneity of the mantle, continental roots, and deep slab anomalies. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jb092ib13p13968] [Citation(s) in RCA: 142] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Montagner JP, Tanimoto T. Global upper mantle tomography of seismic velocities and anisotropies. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/91jb01890] [Citation(s) in RCA: 418] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Isse T, Yoshizawa K, Shiobara H, Shinohara M, Nakahigashi K, Mochizuki K, Sugioka H, Suetsugu D, Oki S, Kanazawa T, Suyehiro K, Fukao Y. Three-dimensional shear wave structure beneath the Philippine Sea from land and ocean bottom broadband seismograms. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jb003750] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Takehi Isse
- Institute for Research on Earth Evolution; JAMSTEC; Kanagawa Japan
| | - Kazunori Yoshizawa
- Division of Earth and Planetary Sciences; Hokkaido University; Sapporo Japan
| | - Hajime Shiobara
- Institute for Research on Earth Evolution; JAMSTEC; Kanagawa Japan
- Earthquake Research Institute; University of Tokyo; Tokyo Japan
| | | | | | | | - Hiroko Sugioka
- Institute for Research on Earth Evolution; JAMSTEC; Kanagawa Japan
| | - Daisuke Suetsugu
- Institute for Research on Earth Evolution; JAMSTEC; Kanagawa Japan
| | - Satoko Oki
- Earthquake Research Institute; University of Tokyo; Tokyo Japan
| | | | - Kiyoshi Suyehiro
- Independent Administrative Institution, Japan Agency for organization Marine-Earth Science and Technology (JAMSTEC); Kanagawa Japan
| | - Yoshio Fukao
- Institute for Research on Earth Evolution; JAMSTEC; Kanagawa Japan
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Stixrude L. Mineralogy and elasticity of the oceanic upper mantle: Origin of the low-velocity zone. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jb002965] [Citation(s) in RCA: 212] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yoshizawa K, Kennett BLN. Multimode surface wave tomography for the Australian region using a three-stage approach incorporating finite frequency effects. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2002jb002254] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- K. Yoshizawa
- Research School of Earth Sciences; Australian National University; Canberra Australia
| | - B. L. N. Kennett
- Research School of Earth Sciences; Australian National University; Canberra Australia
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Gaherty JB. Seismic evidence for hotspot-induced buoyant flow beneath the Reykjanes Ridge. Science 2001; 293:1645-7. [PMID: 11533487 DOI: 10.1126/science.1061565] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Volcanic hotspots and mid-ocean ridge spreading centers are the surface expressions of upwelling in Earth's mantle convection system, and their interaction provides unique information on upwelling dynamics. I investigated the influence of the Iceland hotspot on the adjacent mid-Atlantic spreading center using phase-delay times of seismic surface waves, which show anomalous polarization anisotropy-a delay-time discrepancy between waves with different polarizations. This anisotropy implies that the hotspot induces buoyancy-driven upwelling in the mantle beneath the ridge.
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Affiliation(s)
- J B Gaherty
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
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Abstract
The interpretation of seismic anisotropy in Earth's upper mantle has traditionally been based on the fabrics (lattice-preferred orientation) of relatively water-poor olivine. Here we show that when a large amount of water is added to olivine, the relation between flow geometry and seismic anisotropy undergoes marked changes. Some of the puzzling observations of seismic anisotropy in the upper mantle, including the anomalous anisotropy in the central Pacific and the complicated anisotropy in subduction zones, can be attributed to the enrichment of water in these regions.
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Affiliation(s)
- H Jung
- University of Minnesota, Department of Geology and Geophysics, Minneapolis, MN 55455, USA
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A Comparison between tomographic and geodynamic models of the Earth's mantle. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/gm121p0257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Mainprice D, Barruol G, Ismaïl WB. The Seismic anisotropy of the Earth's mantle: From single crystal to polycrystal. EARTH'S DEEP INTERIOR: MINERAL PHYSICS AND TOMOGRAPHY FROM THE ATOMIC TO THE GLOBAL SCALE 2000. [DOI: 10.1029/gm117p0237] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Lay T, Williams Q, Garnero EJ, Kellogg L, Wysession ME. Seismic wave anisotropy in the D″ region and its implications. THE CORE‐MANTLE BOUNDARY REGION 1998. [DOI: 10.1029/gd028p0299] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Ekström G, Tromp J, Larson EWF. Measurements and global models of surface wave propagation. ACTA ACUST UNITED AC 1997. [DOI: 10.1029/96jb03729] [Citation(s) in RCA: 328] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Li XD, Romanowicz B. Global mantle shear velocity model developed using nonlinear asymptotic coupling theory. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96jb01306] [Citation(s) in RCA: 335] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gaherty JB, Jordan TH, Gee LS. Seismic structure of the upper mantle in a central Pacific corridor. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96jb01882] [Citation(s) in RCA: 145] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ricard Y, Nataf HC, Montagner JP. The three-dimensional seismological model a priori constrained: Confrontation with seismic data. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/95jb03744] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Nolet G, Zielhuis A. Low S velocities under the Tornquist-Teisseyre zone: Evidence for water injection into the transition zone by subduction. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/94jb00083] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhang YS, Tanimoto T. High-resolution global upper mantle structure and plate tectonics. ACTA ACUST UNITED AC 1993. [DOI: 10.1029/93jb00148] [Citation(s) in RCA: 227] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abstract
High-resolution seismic tomographic models of the upper mantle provide powerful new constraints on theories of plate tectonics and hotspots. Midocean ridges have extremely low seismic velocities to a depth of 100 kilometers. These low velocities imply partial melting. At greater depths, low-velocity and high-velocity anomalies record, respectively, previous positions of migrating ridges and trenches. Extensional, rifting, and hotspot regions have deep (> 200 kilometers) low-velocity anomalies. The upper mantle is characterized by vast domains of high temperature rather than small regions surrounding hotspots; the asthenosphere is not homogeneous or isothermal. Extensive magmatism requires a combination of hot upper mantle and suitable lithospheric conditions. High-velocity regions of the upper 200 kilometers of the mantle correlate with Archean cratons.
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Anderson DL, Zhang YS, Tanimoto T. Plume heads, continental lithosphere, flood basalts and tomography. ACTA ACUST UNITED AC 1992. [DOI: 10.1144/gsl.sp.1992.068.01.07] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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34
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Bai W, Vigny C, Ricard Y, Froidevaux C. On the origin of deviatoric stresses in the lithosphere. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/91jb00292] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhang YS, Tanimoto T. Ridges, hotspots and their interaction as observed in seismic velocity maps. Nature 1992. [DOI: 10.1038/355045a0] [Citation(s) in RCA: 179] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tanimoto T. Waveform inversion for three-dimensional density andSwave structure. ACTA ACUST UNITED AC 1991. [DOI: 10.1029/91jb00196] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Romanowicz B. The upper mantle degree 2: Constraints and inferences from global mantle wave attenuation measurements. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jb095ib07p11051] [Citation(s) in RCA: 86] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mocquet A, Romanowicz B. Three-dimensional structure of the upper mantle beneath the Atlantic Ocean inferred from long-period Rayleigh waves: 2. Inversion. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jb095ib05p06787] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Montagner JP, Tanimoto T. Global anisotropy in the upper mantle inferred from the regionalization of phase velocities. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jb095ib04p04797] [Citation(s) in RCA: 182] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhou HW, Clayton RW. PandSwave travel time inversions for subducting slab under the island arcs of the northwest Pacific. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jb095ib05p06829] [Citation(s) in RCA: 126] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mocquet A, Romanowicz B, Montagner JP. Three-dimensional structure of the upper mantle beneath the Atlantic Ocean inferred from long-period Rayleigh waves: 1. Group and phase velocity distributions. ACTA ACUST UNITED AC 1989. [DOI: 10.1029/jb094ib06p07449] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Snieder R. Large-Scale waveform inversions of surface waves for lateral heterogeneity: 2. Application to surface waves in Europe and the Mediterranean. ACTA ACUST UNITED AC 1988. [DOI: 10.1029/jb093ib10p12067] [Citation(s) in RCA: 111] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Richards MA, Hager BH, Sleep NH. Dynamically supported geoid highs over hotspots: Observation and theory. ACTA ACUST UNITED AC 1988. [DOI: 10.1029/jb093ib07p07690] [Citation(s) in RCA: 194] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
The three-dimensional maps of the earth's interior now span regions from the bottom of the crust to the inner core of the earth. Although a wealth of new information on the dynamics of the earth has been discovered, the inner core offers the greatest surprise: it appears to be anisotropic with the axis of symmetry aligned with the axis of rotation.
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48
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Global mapping of the uppermantle by surface wave tomography. ACTA ACUST UNITED AC 1987. [DOI: 10.1029/gd016p0089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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