GP31D:
Magnetic Mysteries: From the Origin of the Hawaiian Emperor Bend to the Source of Marine Magnetic Anomalies I

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Session ID#: 15764

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:  Antony Morris, University of Plymouth, School of Geography, Earth and Environmental Sciences, Plymouth, United Kingdom, Jason Phipps Morgan, Royal Holloway University of London, Egham, United Kingdom and Marco Maffione, Utrecht University, Utrecht, Netherlands
Chairs:  Jason Phipps Morgan, Royal Holloway University of London, Egham, United Kingdom, Richard G Gordon, Rice University, Houston, TX, United States, Julie A Bowles, University of Wisconsin Milwaukee, Geosciences, Milwaukee, WI, United States and Antony Morris, University of Plymouth, School of Geography, Earth and Environmental Sciences, Plymouth, United Kingdom
OSPA Liaison:  Richard G Gordon, Rice University, Houston, TX, United States

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • OS - Ocean Sciences
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:
  • T - Tectonophysics
Index Terms:

1517 Magnetic anomalies: modeling and interpretation [GEOMAGNETISM AND PALEOMAGNETISM]
1519 Magnetic mineralogy and petrology [GEOMAGNETISM AND PALEOMAGNETISM]
1525 Paleomagnetism applied to tectonics: regional, global [GEOMAGNETISM AND PALEOMAGNETISM]
8137 Hotspots, large igneous provinces, and flood basalt volcanism [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Lava Accumulation Patterns at Fast-Spread Ridges and the Fidelity of Marine Magnetic Anomalies (Invited) (166482)
Jeffrey S Gee, Univ California San Diego, La Jolla, CA, United States, Steven C Cande, University of California San Diego, La Jolla, CA, United States and Dennis V Kent, Lamont -Doherty Earth Observatory of Columbia University, Paleomagnetics Lab, Palisades, United States
Near-seafloor magnetics using the AUV URASHIMA at strongly magnetized active back-arc volcanoes of the Okinawa Trough (133445)
Masakazu Fujii, NIPR National Institute of Polar Research / SOKENDAI, Tokyo, Japan and Kyoko Okino, Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan
The effects of post-accretion sedimentation on the magnetization of oceanic crust (174175)
Jerome Dyment, CNRS, Institut de Physique du Globe de Paris, Paris, France and Roi Granot, Ben-Gurion University of the Negev, Department of Geological and Environmental Science, Beer Sheva, Israel
On the Enigmatic Birth of the Pacific Plate within the Panthalassa Ocean (126747)
Lydian Boschman and Douwe J J Van Hinsbergen, Utrecht University, Utrecht, Netherlands
Recent Progress in Understanding the Origin of the Hawaiian-Emperor Bend (187652)
Richard G Gordon, Rice University, Houston, TX, United States and Jason Phipps Morgan, Royal Holloway University of London, Egham, United Kingdom
Age-Distance Relations along the Hawaiian-Emperor Volcanic Chain: History and Current Status (Invited) (125410)
David A Clague, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States
The Hawaii-Emperor Bend: A Seafloor Spreading Perspective (Invited) (154905)
Udo Barckhausen, Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Douglas S Wilson, University of California Santa Barbara, Santa Barbara, CA, United States
Modeling absolute plate and plume motions (185985)
Guillaume Paul Bodinier, Ecole Normale Supérieure Lyon, Lyon, France, Paul Wessel, University of Hawaii at Manoa, Earth Sciences, Honolulu, HI, United States and Clinton P Conrad, University of Oslo, Centre for Planetary Habitability, Oslo, Norway

See more of: Geomagnetism, Paleomagnetism and Electromagnetism