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Geli, L., Aslanian, D., Olivet, J.-L., Vlastelic, I., Dosso, L., Guillou, H. and Bougault, H. (1998). Location of Louisville Hotspot and origin of Hollister Ridge; geophysical constraints. Earth and Planetary Science Letters 164(1-2): 31-40. |
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The application of a new geometric technique [P. Wessel, L. Kroenke, A geometric technique for relocating hotspots and refining absolute plate motions, Nature 387 (1997) 365-369] recently pointed to a recent change in the Pacific plate absolute motion and suggested that the Louisville hotspot could now be located underneath the Hollister Ridge, south of the Eltanin fault system. However, the pole that was proposed for the last 3 Ma does not fit the trend of most Pacific volcanic alignments, supporting geochemical evidence [I. Vlastelic, L. Dosso, H. Guillou, L. Geli, H. Bougault, J. Etoubleau, J. L. Joron, Geochemistry of the Hollister Ridge: relation with the Louisville hotspot and the Pacific-Antarctic Ridge, Earth Planet. Sci. Let. 160 (1998) 777-793] that does not favor a genetic relationship between the Louisville hotspot and the Hollister Ridge. We propose a pole near 71 degrees N, 87.5 degrees W that reconciles kinematic models with a previously proposed location [P. Lonsdale, Geography and history of the Louisville hotspot chain in the Southwest Pacific, J. Geophys. Res. 93 (1988) 3078-3104] for the Louisville hotspot (near a Pleistocene volcano dredged at 50.5 degrees S, 139.2 degrees W) and claim that the Hollister Ridge most probably results from intraplate deformation processes. |
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Abstract |
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Table 1 |
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Keywords
crust; East Pacific; geometry; geophysical methods; geophysical, surveys; gravity methods; Hollister Ridge; hot spots; intraplate, processes; kinematics; Louisville Ridge; mid-ocean ridges;, movement; oceanic crust; Pacific Ocean; plate tectonics; remote, sensing; seamounts; South Pacific; Southeast Pacific; surveys, 18 Solid-earth geophysics; 20 Applied geophysics |
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Publisher
Elsevier Science
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The Netherlands
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