Session Proposal: The Dynamics and Evolution of the Interacting Core and Mantle: Insights from Paleomagnetic Data, Simulations, and Experiments I (2016 AGU Fall Meeting)

DI11B:
The Dynamics and Evolution of the Interacting Core and Mantle: Insights from Paleomagnetic Data, Simulations, and Experiments I

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Session ID#: 16752

Session Description:

Earth’s magnetic field provides a view into the internal dynamics of the deep interior. The paleomagnetic record reveals that the geodynamo is ancient and seemingly persistent, but the mechanisms responsible for its generation throughout Earth history remain elusive. Motivated by major questions, such as the timing of inner core nucleation, efforts are pushing the frontiers of the paleomagnetic record through experimental work and data synthesis. Theoretical models, constrained by the requirement of maintaining a geodynamo through time despite high core conductivity, may offer predictions for ancient field behavior. This session seeks to bring together perspectives from the observational community with those from the modeling community to convene on the current state of the geodynamo's history. We invite contributions that utilize paleomagnetic observations to constrain the intensity or directional variation of the field and contributions that utilize numerical models or theory to gain insight into the deep interior's history and dynamics.

Primary Convener: Andrew Walker, University of Leeds, School of Earth and Environment, Leeds, United Kingdom

Conveners: Andy Nowacki, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Richard K. Bono, University of Liverpool, Liverpool, United Kingdom and Nicholas Swanson-Hysell, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States

Chairs: Andy Nowacki, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom and Nicholas Swanson-Hysell, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States

OSPA Liaison: Andrew Walker, University of Leeds, School of Earth and Environment, Leeds, United Kingdom

Cross-Listed:

GP - Geomagnetism, Paleomagnetism and Electromagnetism
MR - Mineral and Rock Physics
S - Seismology
V - Volcanology, Geochemistry and Petrology

Proposed Co-Organized Session with:

GP - Geomagnetism and Paleomagnetism

Index Terms:

1038 Mantle processes [GEOCHEMISTRY]
1507 Core processes [GEOMAGNETISM AND PALEOMAGNETISM]
1510 Dynamo: theories and simulations [GEOMAGNETISM AND PALEOMAGNETISM]
1525 Paleomagnetism applied to tectonics: regional, global [GEOMAGNETISM AND PALEOMAGNETISM]

Abstracts Submitted to this Session:

Seismological Landscape of the Core-Mantle Boundary (Invited) (117953)

Paula Koelemeijer, University College London, Department of Earth Sciences, London, United Kingdom, Arwen Fedora Deuss, Utrecht University, Utrecht, Netherlands and Jeroen Ritsema, University of Michigan, Department of Earth and Environmental Sciences, Ann Arbor, MI, United States

Chemical Interactions and Consequences for Stable Stratification at the Top of the Core. (Invited) (150158)

Bruce A Buffett, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States

Earth's Core-Mantle equilibrium and a heat sink at the Core Mantle Boundary (165893)

Dario Alfe¹, Monica Pozzo¹, Prof. Christopher J Davies² and David Gubbins³, (1)University College London, London, United Kingdom, (2)Scripps Institution of Oceanography, La Jolla, CA, United States, (3)University of Leeds, Leeds, LS2, United Kingdom

True Dipole Wander Driven by Mantle Convection in the Phanerozoic (Invited) (123774)

Peter Olson, Johns Hopkins University, Department of Earth and Planetary Sciences, Baltimore, MD, United States, Maylis Landeau, Johns Hopkins University, Baltimore, United States and Evan Reynolds, Johns Hopkins University, Baltimore, MD, United States

The Quest to Understand the Secrets of Early Earth - Clues from Precambrian Paleointensity Data (Invited) (145279)

Elisa J Piispa, Michigan Technological University, Geological and Mining Engineering and Sciences, Houghton, United States; Victoria University of Wellington, School of Chemical and Physical Sciences, Wellington, New Zealand and Aleksey V Smirnov, Michigan Technological University, Department of Geological and Mining Engineering and Sciences, Houghton, United States

Simulating 2 Ga of Geodynamo History (Invited) (118056)

Peter E Driscoll, Carnegie Science, Earth & Planets Lab, Washington, United States

Relative Paleointensity and Magnetic Excursions in the Last 3 Myrs During Transitions in North Atlantic Paleoceanography: Comparison of the Brunhes and Matuyama Chrons (Invited) (176820)

James E T Channell, Univ. Florida, Geological Sciences, Gainesville, United States, Simon Crowhurst, University of Cambridge, Cambridge, United Kingdom and David A Hodell, University of Cambridge, Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, Cambridge, United Kingdom

Global characteristics of geomagnetic excursions as seen in global empirical models and a numerical geodynamo simulation (154665)

Monika C Korte, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Section 2.3 – Geomagnetism, Potsdam, Germany, Ingo Wardinski, University of Nantes, Nantes, France and Maxwell Christopher Brown, University of Minnesota, Institute for Rock Magnetism, Department of Earth and Environmental Sciences, Minneapolis, MN, United States