Paleolatitudes of Kerguelen, Louisville and Hawaii hotspots
Hotspot motion and
polar wander
both can lead to changes in hotspot latitude. An example for the
Kerguelen hotspot is given to the right: The green line shows changes in
hotspot latitude predicted from polar motion only, using the
Besse and Courtillot (1991) polar wander curve. The blue blue line
shows changes in hotspot latitude predicted from our model of hotspot
motion only. The red line is takes both effects into account.
It is compared with results obtained from paleomagnetism (shown
as black dots with error bars).
The comparison includes results from
Ocean Drilling Program (ODP) legs 183
(Kerguelen Plateau/Broken Ridge) 192 (Ontong-Java) and 197 (Hotspots)
(click
here for the summary of the leg, which was proposed by John Tarduno, Rory Cottrell and myself).
I also participated in the IODP proposal that led to Expedition 330 "Louisville Seamount Trail - Implications for geodynamic mantle flow models and the geochemical evolution of primary hotspots".
The project was done with Maria Antretter, Franz Heider and
Prof. Heinrich C. Soffel for the Kerguelen and Ontong-Java Plateau,
and John Tarduno
and the Leg 197 Shipboard party for the Hawaii hotspot.
It also included
my participation in ODP Leg 197.
- Antretter, M., B. Steinberger,
F. Heider and H. Soffel (2002).
Paleolatitudes of the Kerguelen hotspot:
new paleomagnetic results and dynamic modeling,
Earth Planet. Sci. Lett., 203, 635-650, doi:10.1016/S0012-821X(02)00841-5 [abstract]
[pdf]
- Tarduno, J.A., R.A. Duncan, D.W. Scholl, R.D. Cottrell,
B. Steinberger, T. Thordarson, B.C. Kerr, C.R. Neal, F.A. Frey,
M. Torii and C. Carvallo (2003).
The Emperor Seamounts: Southward motion of the Hawaiian
hotspot plume in Earth's mantle, Science, 301, 1064-1069, doi:10.1126/science.1086442
[pdf]
[perspective]
- Antretter, M., P. Riisager, S. Hall, X. Zhao and B. Steinberger (2004).
Modeled paleolatitudes for the Louisville hotspot and the
Ontong Java Plateau, in Origin and Evolution of the Ontong Java Plateau,
The Geological Society (London) Special Publication 229, pp. 21-30,
edited by G. Fitton, J. Mahoney, P. Wallace, and A. Saunders,
The Geological Society, London, U. K.
[abstract]
[pdf]
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