DI51C:
Deep and Dynamic: The Lower Boundary Layer, Mantle Plumes, and Their Role in Earth's Mantle Dynamics II

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Session ID#: 16715

Session Description:
Mantle dynamics at many scales is influenced by boundary layer processes. The bottom boundary layer controls plume generation and is dynamically linked to deep thermochemical features, such as LLSVPs and ULVZs, as well as to the outer core. Plumes rising from the bottom boundary layer sample the whole mantle and place their signature on Earth’s surface, providing insight into mixing of chemical heterogeneities and the state of the deep mantle.

This session aims to explore the structure, mechanisms and dynamics of the deep mantle boundary layer including (but not limited to) the generation of mantle plumes, interactions with deep thermochemical structures, the dynamics of the outer core, and the resultant surface observations that might provide useful constraints on this region. We welcome theoretical, experimental, and observational contributions from geodynamics, seismology, geomagnetism, mineral physics, petrology, and other disciplines.

Primary Convener:  Tobias Rolf, University of Oslo, Centre for Earth Evolution and Dynamics, Oslo, Norway
Conveners:  Keely Anne O'Farrell, University College London, London, United Kingdom, Scott D. King, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States and Robert Moucha, Syracuse University, Earth Sciences, Syracuse, NY, United States
Chairs:  Scott D. King, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States, Keely Anne O'Farrell, University College London, London, United Kingdom, Robert Moucha, Syracuse University, Earth Sciences, Syracuse, NY, United States and Tobias Rolf, University of Oslo, Centre for Earth Evolution and Dynamics, Oslo, Norway
OSPA Liaison:  Keely Anne O'Farrell, University College London, London, United Kingdom

Cross-Listed:
  • GP - Geomagnetism, Paleomagnetism and Electromagnetism
  • P - Planetary Sciences
  • T - Tectonophysics
Index Terms:

5430 Interiors [PLANETARY SCIENCES: SOLID SURFACE PLANETS]
8121 Dynamics: convection currents, and mantle plumes [TECTONOPHYSICS]
8124 Earth's interior: composition and state [TECTONOPHYSICS]
8147 Planetary interiors [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Interaction Between the Supercontinent Cycle and the Evolution of Intrinsically Dense Provinces in the Deep Mantle (134942)
Sean James Trim and Julian Philip Lowman, University of Toronto, Toronto, ON, Canada
Deep Controls on the Geometry of Volcanic Hotspot Tracks (Invited) (118494)
Rakib Hassan1, Dietmar Müller2, Michael Gurnis3, Simon Williams1 and Nicolas E Flament2,4, (1)University of Sydney, EarthByte Group, Sydney, Australia, (2)University of Sydney, EarthByte Group, Sydney, NSW, Australia, (3)California Institute of Technology, Seismological Laboratory, Pasadena, CA, United States, (4)University of Wollongong, School of Earth, Atmospheric and Life Sciences, Wollongong, NSW, Australia
The Source and Lateral Motion of Mantle Plumes From 3D Mantle Dynamic Models (160261)
Mingming Li, University of Colorado at Boulder, Department of Physics, Boulder, CO, United States and Shijie Zhong, University of Colorado at Boulder, Department of Physics, Boulder, United States
Development of chemical zoning in models of self-consistent plume generation (180847)
Juliane Dannberg, Colorado State University, Fort Collins, CO, United States and Rene Gassmoeller, GFZ Potsdam, Potsdam, Germany
Ultra-Low Velocity Zone at the Base of Iceland Hotspot (124599)
Kaiqing Yuan, University of California Berkeley, Berkeley, CA, United States and Barbara A Romanowicz, University of California Berkeley, Department of Earth and Planetary Science, Berkeley, United States
Strong focussing of S- and P-waves turning near the CMB beneath Hawaii (175709)
Sebastian Rost and Andy Nowacki, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom
Multipathing within LLSVPs in models of thermal and thermochemical mantle convection (178073)
Andy Nowacki, University of Leeds, School of Earth and Environment, Leeds, LS2, United Kingdom, Jack Walpole, University of Bristol, Bristol, United Kingdom, Rhodri Davies, Australian National University, Research School of Earth Sciences, Canberra, Australia, Henrikus van Heck, Cardiff University, Cardiff, CF24, United Kingdom, James M Wookey, University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom and J Huw Davies, Cardiff University, School of Earth and Environmental Sciences, Cardiff, CF24, United Kingdom
Observations and models of seismic anisotropy in the lowermost mantle: Towards an understanding of flow patterns (Invited) (120307)
Maureen D Long, Yale University, Department of Earth & Planetary Sciences, New Haven, CT, United States, Heather A Ford, Yale University, New Haven, CT, United States, Creasy Neala, Colorado School of Mines, Golden, United States and Christine Thomas, University of Münster, Institut of Geophysics, Münster, Germany

See more of: Study of Earth's Deep Interior