GP31A:
Motion Between Hot Spots and True Polar Wander II Posters


Submit an Abstract to this Session


Session ID#: 52530

Session Description:
In a convecting planet, mantle plumes and their surface manifestations, hotspots, doubtless are in relative motion. Past estimates of rates of motion between hotspots span an enormous range, however, from as low as ~3 mm/yr to as high as ~80 mm/yr.   Paleomagnetic investigations have established that some hotspots have moved significantly relative to the spin axis, which was originally interpreted as evidence for true polar wander, the motion of the entire solid Earth relative to the spin axis. Some later investigations have argued that the motion records true polar wander while other investigations argue that it records motion of hotspots relative to one another and relative to the deep mantle. Recently new evidence has been presented supporting both relatively slow motion between hotspots on the one hand and rapid motion between hotspots on the other. We encourage submissions related to any and all aspects of these phenomena.
Primary Convener:  Richard G Gordon, Rice University, Houston, TX, United States
Conveners:  Paul Wessel, University of Hawaii at Manoa, Honolulu, HI, United States, Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States and Jason Phipps Morgan, Royal Holloway University of London, Egham, United Kingdom
Primary Liaison:  Richard G Gordon, Rice University, Houston, TX, United States
Chairs:  Richard G Gordon, Rice University, Houston, TX, United States, Paul Wessel, University of Hawaii at Manoa, Honolulu, HI, United States, Joann M Stock, California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States and Jason Phipps Morgan, Royal Holloway University of London, Egham, United Kingdom
OSPA Liaison:  Paul Wessel, University of Hawaii at Manoa, Honolulu, HI, United States
Co-Organized with:
Geomagnetism, Paleomagnetism and Electromagnetism, and Geomagnetism, Paleomagnetism and Electromagnetism

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • G - Geodesy

Proposed Co-Organized Session with:
  • GP - Geomagnetism, Paleomagnetism and Electromagnetism
Index Terms:

1229 Reference systems [GEODESY AND GRAVITY]
1525 Paleomagnetism applied to tectonics: regional, global [GEOMAGNETISM AND PALEOMAGNETISM]
8137 Hotspots, large igneous provinces, and flood basalt volcanism [TECTONOPHYSICS]
8158 Plate motions: present and recent [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Sources of hotspot relative motions in whole-mantle convection models (390348)
Nicolas Coltice, Ecole Normale Supérieure Paris, Paris, France, Maelis Arnould, Ecole Normale Supérieure de Lyon, Laboratoire des Sciences de la Terre, Lyon, France and Nicolas E Flament, University of Wollongong, Environmental Futures, School of Science, Wollongong, NSW, Australia
Toward a Definitive Estimate of the Geologically Current Absolute Angular Velocities of the Plates from Hotspot Tracks and Seismic Anisotropy (421878)
Chengzu Wang1, Richard G Gordon1, Tuo Zhang2 and Lin Zheng1, (1)Rice University, Houston, TX, United States, (2)Rice Univ, Houston, TX, United States
A New Key Paleomagnetic Pole for the ~1.8 Ga Kaapvaal Craton: Implications for Paleoproterozoic Apparent Polar Wander and Paleogeographic Reconstruction. (403772)
Cedric Djeutchou, Michiel de Kock and Herve Wabo, University of Johannesburg, CIMERA, Department of Geology, Auckland Park, South Africa
Late Cretaceous Apparent Polar Wander of North America from the Paleomagnetism of the Fort Hays Limestone (420151)
Gary D. Acton, Texas A&M University, International Ocean Discovery Program, College Station, United States and Richard G Gordon, Rice University, Houston, TX, United States
Estimates of true polar wander since 300Ma. (429698)
Jean Besse, Institut de Physique du Globe de Paris, paléomagnetisme, Paris, France, Sophie Vicente De Gouveia, Institut de Physique du Globe de Paris, Paris, France and Marianne Greff-Lefftz, Université Paris Cité, Institut de physique du globe de Paris, CNRS, Paris, France
Apparent Polar Wander of Pacific and Indo-Atlantic Hotspots During Cretaceous Time: Implications for Motion Between Hotspots and True Polar Wander (451046)
Kevin Gaastra, Jet Propulsion Laboratory, Pasadena, United States and Richard G Gordon, Rice University, Houston, TX, United States
Further Evidence for a Stationary Hawaiian Hotspot During Formation of the Emperor Seamount Chain: Skewness Analysis of Pacific Plate Magnetic Anomaly 24r (460149)
Daniel Woodworth, Rice University, Houston, United States and Richard G Gordon, Rice University, Houston, TX, United States
Skewness analysis of Pacific Plate Magnetic Anomalies 22r-22n-21r and possible implications for the formation of the Hawaiian-Emperor Bend, True Polar Wander, and Cenozoic Global Climate change (430283)
Alice Staro1, Kevin Gaastra2, Lin Zheng3 and Richard G Gordon3, (1)University of Milan, Earth Science, Milan, Italy, (2)Jet Propulsion Laboratory, Pasadena, United States, (3)Rice University, Houston, TX, United States
Oblique Seafloor Spreading Across Intermediate and Superfast Spreading Centers (402290)
Tuo Zhang, Richard G Gordon and Chengzu Wang, Rice University, Houston, TX, United States

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