DI13A:
The Dynamics and Evolution of the Interacting Core and Mantle: Insights from Paleomagnetic Data, Simulations, and Experiments II Posters

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Session ID#: 15904

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:  Andrew Walker, University of Leeds, School of Earth and Environment, Leeds, United Kingdom and Richard K. Bono, University of Liverpool, Liverpool, United Kingdom
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:

The Hadean to Paleoarchean geodynamo: microconglomerate tests from siliciclastic metasedimentary rocks from the Southern Cross Terrane of Western Australia (175944)
Rory Danielle Cottrell, University of Rochester, Earth and Environmental Sciences, Rochester, NY, United States, John Anthony Tarduno, University of Rochester, Department of Physics and Astronomy, Rochester, NY, United States, Richard K. Bono, University of Liverpool, Liverpool, United Kingdom, Eric R Thern, John De Laeter Centre for Isotope Research, Curtin University, Department of Applied Geology, Perth, Australia and Susanna K Chhibber, University of Rochester, Department of Earth & Environmental Sciences, Rochester, NY, United States
Geomagnetic paleointensity and the long-term history of the geodynamo: Challenges and perspectives (139611)
Aleksey V Smirnov, Michigan Technological University, Department of Geological and Mining Engineering and Sciences, Houghton, United States
A Paleointensity-Based Test of the Geocentric Axial Dipole (GAD) Hypothesis (180500)
Moritz H Heimpel1, Toni Veikkolainen2, Michael Edwin Evans1, Lauri J Pesonen2 and Kimmo Korhonen3, (1)University of Alberta, Department of Physics, Edmonton, AB, Canada, (2)Univ Helsinki, Helsinki, Finland, (3)Geological Survey of Finland, Espoo, Finland
The strength of the Mesoproterozoic geomagnetic field: new absolute paleointensity estimates from ~1.1 billion-year-old Midcontinent Rift volcanics (154089)
Courtney Jean Sprain, University of Florida, Department of Geological Sciences, Ft Walton Beach, FL, United States, Nicholas Swanson-Hysell, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States, Luke M Fairchild, University of California Berkeley, Earth and Planetary Science, Berkeley, United States and Kevin M Gaastra, University of California Berkeley, Berkeley, CA, United States
Paleomagnetism of the Neoproterozoic Blekinge-Dalarna Dolerites in Western Sweden and Implications of the Sveconorwegian Loop(s) (151972)
Zheng Gong, Yale University, Department of Earth and Planetary Sciences, New Haven, United States, David A Evans, Yale University, Department of Earth and Planetary Sciences, New Haven, CT, United States and Sten-Ake Elming, Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Luleå, Sweden
Characterisation and Implications of an Exceptionally Weak Time-averaged Geomagnetic field in the Devonian (360-420 Ma) (173760)
Andrew John Biggin1, Louise Hawkins2, Valentina Scherbakova3, Taslima Anwar4, Vadim A Kravchinsky5, Andrei Shatsillo6, Roman V Veselovskiy7 and Vladimir Pavlov7, (1)University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, (2)University of Liverpool, Liverpool, United Kingdom, (3)Russian Academy of Sciences, Geophysical Observatory Borok, Borok, Russia, (4)University of Alberta, Edmonton, AB, Canada, (5)University of Alberta, Physics, Edmonton, AB, Canada, (6)Schmidt Institute of Physics of the Earth RAS, Moscow, Russia, (7)Institute of Physics of the Earth RAS, Moscow, Russia
Refining the Jurassic Magnetic Quiet Zone (169307)
Masako Tominaga, Texas A&M University College Station, College Station, TX, United States, Maurice Tivery, Woods Hole Oceanographic Institution, Woods Hole, MA, United States and William W Sager, University of Houston, Department of Earth and Atmospheric Sciences, Houston, United States
When can sediments bring pertinent information about reversals? (138690)
Jean-Pierre Valet, Institut de Physique du Globe de Paris, Paris, France, Laure Meynadier, Institut de Physique du Globe, Paris, France, Quentin Simon, CEREGE, Aix en Provence, France and Nicolas Thouveny, CEREGE, Aix-en-Provence Cedex, France
A Power Spectrum for Geomagnetic and Paleomagnetic Field Variations (200009)
Catherine Constable, University of California San Diego, Scripps Institution of Oceanography, IGPP, La Jolla, CA, United States
Effects of a stably stratified layer on dynamos driven by double diffusive convection (155322)
Futoshi Takahashi, Kyushu University, Fukuoka, Japan
Quasi-geostrophic models of core dynamics in the equatorial region (156237)
Dominique Jault, University Grenoble Alpes, ISTerre (CNRS), France and Nathanaël Schaeffer, CNRS, ISTerre, Grenoble, France
Eddy viscosity of core flow inferred from comparison between time evolutions of the length-of-day and a core surface flow model (159884)
Masaki Matsushima, Tokyo Institute of Technology, Tokyo, Japan
Electrical resistivity saturation of solid iron at Earth's core conditions from density functional theory. (166193)
Monica Pozzo and Dario Alfe, University College London, London, United Kingdom
The reaction of Silicate melts with liquid iron in the deep Earth (167855)
Hang Cui, University College London, London, United Kingdom and Lars P Stixrude, University College London, Earth Sciences, London, United Kingdom
Chemical Transport Across The Core-Mantle Boundary- Impact On The Formation Of A Bumpy Layer (175186)
Ulrich Hansen, University of Münster, Institute for Geophysics, Münster, Germany and Claudia Stein, University of Munster, Institut f. Geophysik, Munster, Germany

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