Relationship between the viscosity and topography of the ultralow-velocity zone near the core-mantle boundary

Earth and Planetary Science Letters

Volumn 299, Issue 3-4, 2010, Pages 382-386

  Hier Majumder, Saswata ^a   Revenaugh, Justin ^b  

^a University of Maryland   (United States)

^b UNIVERSITY OF MINNESOTA   (United States)

Author keywords

Core mantle boundary; Gravity current; ULVZ; Viscosity

Indexed keywords

CORE-MANTLE BOUNDARY; EARTH'S CORE; GRAVITY CURRENTS; LOWER MANTLE; ORDERS OF MAGNITUDE; SCALING RELATIONSHIPS; TOPOGRAPHIC VARIABILITY; ULTRALOW VELOCITY ZONE; ULVZ;

GRAVITATION; GRAVITY WAVES; PLANETARY SURFACE ANALYSIS; SEISMIC WAVES; TOPOGRAPHY; VELOCITY CONTROL;

VISCOSITY;

CORE-MANTLE BOUNDARY; GRAVITY SURVEY; LOWER MANTLE; PARTIAL MELTING; SEISMIC REFLECTION; SEISMIC WAVE; TOPOGRAPHY; VISCOSITY;

EID: 78049331853     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2010.09.018     Document Type: Article

References (23)

1. Davaille A., Girard F., Bars M.L. How to anchor a hotspot in a convecting mantle?. Earth Planet. Sci. Lett. 2002, 203:621-634.
2. Garnero E., McNamara A.K. Structure and dynamics of Earth's lower mantle. Science 2008, 320:626-628.
3. Garnero E.J., Lay T., Mcnamara A. Plates, plumes, and planetary processes. Implications of lower-mantle structural heterogeneity for the existence and nature of whole mantle plumes 2007, volume 430:79-101. 10.1130/2007.2430(05).
4. Hier-Majumder S. Influence of contiguity on seismic velocities of partially molten aggregates. J. Geophys. Res. 2008, 113:B12205. 10.1029/2008JB005662.
5. Hier-Majumder S., Abbott M.E. The influence of dihedral angle on seismic velocities of partially molten rocks. Earth Planet. Sci. Lett. 2010, 10.1016/j.epsl.2010.08.007.
6. Hier-Majumder S., Ricard Y., Bercovici D. Role of grain boundaries in magma migration and storage. Earth Planet. Sci. Lett. 2006, 248:735-749. 10.1016/j.epsl.2006.06.015.
7. Hustoft J., Scott T., Kohlstedt D.L. Effect of metallic melt on the viscosity of peridotite. Earth Planet. Sci. Lett. 2007, 260:355-360.
8. Hutko A., Lay T., Revenaugh J. Localized double-array stacking analysis of Pcp: D" and ULVZ structure beneath the Cocos plate, Mexico, central Pacific and north Pacific. Phys. Earth Planet. Inter. 2009, 173:60-74.
9. Jellinek A., Manga M. Links between long-lived hotspots, mantle plumes D", and plate tectonics. Rev. Geophys. 2004, 42.
10. Knittle E., Jeanloz R. Earth's core-mantle boundary: results of experiments at high pressures and temperatures. Science 1991, 251:1438-1443.
11. Labrosse S., Hernlund J., Coltice N. A crystallizing dense magma ocean at the base of earth's mantle. Nature 2007, 450:866-869.
12. Leal G. Laminar flow and convective transport processes. Butterworth-Heinemann 1992.
13. Liebske C., Schmickler B., Terasaki H., Poe B.T., Suzuki A., Funakoshi K., Ando R., Rubie D.C. Viscosity of peridotite liquid up to 13GPa: implications for magma ocean viscosities. Earth Planet. Sci. Lett. 2005, 240:589-604.
14. Mao W.L., Mao H.K., Sturhahn W., Zhao J., Prakapenka V.B., Meng Y., Shu J., Fei Y., Hemley R.J. Iron-rich post perovskite and the origin of the ultra low velocity zone. Science 2006, 312:564-565.
15. Roscoe R. The viscosity of suspensions in of rigid spheres. Br. J. Appl. Phys. 1952, 3:267-269.
16. Rost S., Garnero E.J., Williams Q. Fine-scale ultralow-velocity zone structure from high frequency seismic array data. J. Geophys. Res. B: Solid Earth 2006, 111.
17. Rost S., Garnero E.J., Williams Q., M., M. Seismological constraints on a possible plume root at the core-mantle boundary. Nature 2005, 435:666-669.
18. Rost S., Revenaugh J. Small scale ultralow-velocity zone structure imaged by ScP. J. Geophys. Res. 2003, 108.
19. Scott T., Kohlstedt D. The effect of large melt fraction on the deformation behavior of peridotite. Earth Planet. Sci. Lett. 2006, 246:177-187.
20. Takei Y. Acoustic properties of partially molten media studied on a simple binary system with a controllable dihedral angle. J. Geophys. Res. 2000, 105:16,665-16,682.
21. Takei Y., Holtzman B.K. Viscous constitutive relations of solid-liquid composites in terms of grain boundary contiguity: 1. Grain boundary diffusion control model. J. Geophys. Res. 2009, 114. 10.1029/2008JB005850.
22. Williams Q., Garnero E. Seismic evidence for partial melt at the base of Earth's mantle. Science 1996, 273:1528-1530.
23. Yamazaki D., Karato S.i. Some mineral physics constraints on the rheology and geothermal structure of earth's lower mantle. Am. Mineralog. 2001, 86:385-391.