Implications of a metal-bearing chemical boundary layer in D" for mantle dynamics

Geophysical Research Letters

Volumn 23, Issue 22, 1996, Pages 3091-3094

  Manga, Michael ^a   Jeanloz, Raymond ^b  

^a UNIVERSITY OF OREGON   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

METALS; SILICATES; THERMAL CONDUCTIVITY; BOUNDARY LAYERS; HEAT CONVECTION; SEISMIC WAVES; THERMAL CONDUCTIVITY OF SOLIDS;

CHEMICAL BOUNDARY LAYERS; CORE-MANTLE BOUNDARY; LOWER MANTLE CONDITION; MANTLE CONVECTION; METALLIC MINERAL; SILICATE LAYERS; TEMPERATURE VARIATION; TIME DEPENDENCE;

BOUNDARY LAYERS; GEOLOGY;

CORE MANTLE BOUNDARY; DENSE METALLIC MINERALS; MANTLE CONVECTION; METAL RICH CHEMICAL BOUNDARY LAYERS; NONMETALLIC CRYSTALS;

CHEMICAL BOUNDARY; CONVECTION; MANTLE (LOWER); METALLIC MINERAL; UPWELLING;

EID: 0030292011     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/96GL03021     Document Type: Article

References (13)

1. Anderson, D. L., Superplumes or supercontinents? Geology, 22, 39-42, 1994.
2. Berman, B.R., Thermal conduction in solids, Oxford University Press, 1976.
3. Bloxham, J., and D. Gubbins, Thermal core-mantle interactions, Nature, 325, 511-513, 1987.
4. Boehler, R., Melting of the Fe-FeO and the Fe-FeS systems at high pressure: Constraints on core temperatures, Earth Planet. Sci. Lett., 111, 217-227, 1992.
5. Brown, J.M., Interpretation of the D" zone at the base of the mantle: Dependence on assumed values of thermal conductivity, Geophys. Res. Lett., 13, 1509-1512, 1986.
6. Buffett, B.A., Effects of a heterogeneous mantle on the velocity and magnetic fields at the top of the core, Geophys. J. Int., 125, 303-317, 1996.
7. Bunge, H.-P., M.A. Richards, and J.R. Baumgardner, Effect of depth-dependent viscosity on the planform on mantle convection, Nature, 319, 436-438, 1996.
8. Busse, F.H., and J. Wicht, A simple dynamo caused by conductivity variations, Geophys. Astrophys. Fluid Dyn., 64, 135-144, 1992.
9. Davies, G.F., and M. Gurnis, Interaction of mantle dregs with convection: Lateral heterogeneity at the core-mantle boundary, Geophys. Res. Lett., 13, 1517-1520, 1986.
10. Garnero, E.J., and D.V. Helmberger, Seismic detection of a thin laterally varying boundary layer at the base of the mantle beneath the central-Pacific, Geophys. Res. Lett., 23, 977-980, 1996.
11. Wysession, M.E., R.W. Valenzuela, A.-N. Zhu, and L. Bartko, Investigating the base of the mantle using differential travel times, Phys. Earth Planet. Int., 92, 67-84, 1995.
12. Yukutake, H., and M. Shimada, Thermal conductivity of NaCl, MgO, Coesite and Stishovite up to 40 kbar, Phys. Earth Planet. Int., 17, 193-200, 1978.
13. Zhong, S., and M. Gurnis, Dynamic feedback between a continentlike raft and thermal convection, J. Geophys. Res., 98, 12,219-12,232, 1993.