[Geodynamics] AGU Session GP017: The Origin of the Hawaiian-Emperor Bend and its Implications for Plate Motions, Polar Wander, and Plate and Mantle Dynamics

[Richard G. Gordon]

Dear Colleagues:

We encourage submissions to session GP017 of the Fall AGU meeting to be 
held in San Francisco in December:

/The origin of the Hawaiian-Emperor Bend and its Implications for Plate 
Motions, Polar Wander, and Plate and Mantle Dynamics/.

The welcome mat is out to geodynamicists, marine geophysicists, 
geochronologists, seismologists, and--of course--paleomagnetists. Our 
two invited speakers are

Dave Clague, Monterey Bay Aquarium Research Institute
Udo Barckhausen,BGR Federal Institute for Geosciences and Natural Resources

It promises to be an exciting session.  Please see the full session 
description below.**


    GP017:
    The Origin of the Hawaiian-Emperor Bend and its Implications for
    Plate Motions, Polar Wander, and Plate and Mantle Dynamics

*Session ID#: * 13472

Session Description:

The Hawaiian-Emperor Bend (HEB), which marks a 60° change in strike from 
the NNW-striking Emperor seamount chain to the WNW-striking Hawaiian 
chain, was first thought to denote a change in Pacific plate motion. It 
has alternatively been argued from global plate circuits that the HEB 
instead reflects a change in motion of the Hawaiian plume.  The time 
near the bend may also be linked to an episode of true polar wander. 
Whether the Hawaiian plume migrates slowly or rapidly has profound 
implications for the structure and dynamics of mantle convection.  
Recent improvements to HEB geochronology, the geomagnetic reversal time 
scale, the recognition of volcanic events related a change in Pacific 
plate stress near the age of the HEB, new Pacific paleomagnetic poles, 
and timing and rates of spreading at Pacific plate boundaries bring 
evidence to change earlier interpretations.  We encourage submissions on 
any and all topics related to the HEB.

Primary Convener: *Richard G Gordon*, Rice University, Houston, TX, 
United States
Conveners: *Jason Phipps Morgan*, Royal Holloway University of London, 
Egham, TW20, United Kingdom and *Steven C Cande*, University of 
California San Diego, La Jolla, CA, United States

*Co-Organized with: **Geomagnetism, Paleomagnetism and 
Electromagnetism*,and Tectonophysics
Cross-Listed:

  * DI - Study of the Earth's Deep Interior
  * OS - Ocean Sciences
  * V - Volcanology, Geochemistry and Petrology

We hope to see you there!

Richard, Jason, and Steve

-- 
Richard G. Gordon
Keck Professor of Geophysics
Department of Earth Science
Rice University
Houston, TX 77005 USA

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