DI34A:
Mantle Plumes from Head to Toe I


Session ID#: 7722

Session Description:
Rising mantle plumes carry mass, heat, and chemical anomalies from their ‘toes’ at the base of the mantle to their ‘heads’ near the surface, where plumes spread beneath the lithosphere.  Recent investigations reveal growing evidence for complex plume dynamics near the Core-Mantle Boundary (CMB) and interactions with tectonic plates.  Near the CMB, slow shear velocities suggest the existence of large piles of chemically anomalous material that change plume structure and control plume initiation.  This material may be incorporated into plume stems, altering the composition of hotspot lavas.  Near the surface, spreading plume heads are the source of chemically anomalous hotspot lavas, dynamic topography, and changes to lithospheric deformation and rifting.  This session aims to take a broad view of mantle plumes, looking at advances in understanding of their formation, rise, lithosphere interaction, and eventual effect on surface processes.  We welcome recent work on plumes at all scales and depths.
Primary Convener:  Eric L Mittelstaedt, University of Idaho, Moscow, ID, United States
Conveners:  Dominique Weis, University of British Columbia, PCIGR, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada and Peter E van Keken, University of Michigan Ann Arbor, Ann Arbor, MI, United States
Chairs:  Eric L Mittelstaedt, University of Idaho, Moscow, ID, United States and Dominique Weis, University of British Columbia, PCIGR, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada
OSPA Liaison:  Eric L Mittelstaedt, University of Idaho, Moscow, ID, United States

Cross-Listed:
  • S - Seismology
  • T - Tectonophysics
  • V - Volcanology, Geochemistry and Petrology
Co-Sponsor(s):
  • EGU-GD: European Geosciences Union - Division on Geodynamics -
Index Terms:

8121 Dynamics: convection currents, and mantle plumes [TECTONOPHYSICS]
8124 Earth's interior: composition and state [TECTONOPHYSICS]
8137 Hotspots, large igneous provinces, and flood basalt volcanism [TECTONOPHYSICS]
8175 Tectonics and landscape evolution [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Thermo-chemical plumes rooted in the deep mantle beneath major hotspots: implications for mantle dynamics (Invited) (60429)
Barbara A Romanowicz, Institut de Physique du Globe, Paris, France; Berkeley Seismological Lab, Berkeley, CA, United States and Scott French, NERSC, Oakland, CA, United States
Past Plate Motions and The Evolution of Earth’s Lower Mantle: Relating LLSVPs and Plume Distribution (Invited) (69542)
Abigail Louise Bull, Trond Helge Torsvik and Grace E Shephard, University of Oslo, Centre for Earth Evolution and Dynamics (CEED), Oslo, Norway
Fluid dynamics of active heterogeneities in a mantle plume conduit (75350)
Cinzia G. Farnetani1, Angela Limare1 and Albrecht W Hofmann2, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Max Planck Institute for Chemistry, Mainz, Germany
The Hawaiian Mantle Plume from Toe to Head along the Northwest Hawaiian Ridge (75831)
Lauren Harrison, EOAS University of British Columbia, Vancouver, BC, Canada, Dominique Weis, University of British Columbia, PCIGR, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada and Michael O Garcia, University of Hawaii at Manoa, Honolulu, HI, United States
Copious, Long-lived Rejuvenated Volcanism in the Northern Hawaiian Islands (75497)
Michael O Garcia1, Dominique Weis2, Diane W Hanano3, Brian R Jicha4 and Garrett Ito1, (1)University of Hawaii at Manoa, Honolulu, HI, United States, (2)University of British Columbia, PCIGR, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (3)University of British Columbia, Vancouver, BC, Canada, (4)University of Wisconsin-Madison, Madison, United States
Mantle plume capture, anchoring and outflow during ridge interaction (Invited) (66227)
Sally A Gibson, University of Cambridge, Earth Sciences, Cambridge, United Kingdom, Mark A Richards, University of California Berkeley, Berkeley, CA, United States and Dennis Geist, National Science Foundation, Arlington, VA, United States
Lithospheric Controls on Magma Composition along Earth's Longest Continental Hotspot-Track (71971)
Rhodri Davies1, Nicholas Rawlinson2, Giampiero Iaffaldano3 and Ian H Campbell1, (1)Australian National University, Research School of Earth Sciences, Acton, ACT, Australia, (2)Australian National University, Canberra, Australia, (3)University of Copenhagen, Copenhagen, Denmark
The Relative Motion of Pacific Mantle Plumes: Implications for the Viscosity Structure of the Earth’s Mantle. (81520)
Kevin Konrad1, Anthony A P Koppers2, Bernhard M Steinberger3, Jasper G Konter4, Val Finlayson4 and Matthew G Jackson5, (1)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States, (2)Oregon State University, College of Earth Ocean and Atmospheric Sciences, Corvallis, United States, (3)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (4)University of Hawaii at Manoa, Department of Geology and Geophysics, Honolulu, HI, United States, (5)University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States

See more of: Study of Earth's Deep Interior