V018
Deciphering the links between mantle geochemistry, dynamics and structure
Session ID#: 80783
Session Description:
The interrelationship of geochemistry, dynamics and structure of the Earth’s mantle remains an active area of research. Formation and development of chemical reservoirs and boundary layers occurs as a function of time, pressure, temperature, chemical differentiation, mantle flow, mixing and crustal recycling.
The large body of observational data at Earth’s surface, including seismic detections and geochemistry (major, trace, and isotopic) of mantle-derived melts, is becoming increasingly capable of informing dynamic models of the Earth’s interior. Sophisticated modeling approaches in turn provide better understanding of timing, nature and magnitudes of geochemical evolution of the mantle and sampling of deep reservoirs.
This session invites submissions that emphasize cross-disciplinary approaches to address questions including, but not limited to: links between boundary layers, compositional changes and surface observations; nature, development, dynamics and longevity of LLSVPs, ULVZs, and other major reservoirs, including the core; material recycling; and survival of primordial material.
Co-Organized:
Index Terms:
1025 Composition of the mantle [GEOCHEMISTRY]
1038 Mantle processes [GEOCHEMISTRY]
7208 Mantle [SEISMOLOGY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
Primary Convener: Val Finlayson, University of Maryland College Park, Department of Geology, College Park, MD, United States
Convener: Juliane Dannberg, University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States
Primary Liaison: Val Finlayson, University of Maryland College Park, Department of Geology, College Park, MD, United States
Primitive helium is sourced from seismically slow regions in the lowermost mantle (Invited) (488152)
Curtis D Williams1, Sujoy Mukhopadhyay2, Maxwell L Rudolph1 and Barbara A Romanowicz3,4, (1)University of California Davis, Department of Earth and Planetary Sciences, Davis, CA, United States, (2)University of California Davis, Davis, MA, United States, (3)University of California Berkeley, Department of Earth and Planetary Science, Berkeley, CA, United States, (4)Institut de Physique du Globe de Paris, Paris, France
Cenozoic Evolution of the Iceland Hotspot Reveals a Temporal Shift in the Composition of the Primordial Component (494674)
Matthew G Jackson, University of California Santa Barbara, Earth Science, Santa Barbara, CA, United States, Janne Blichert-Toft, Lab Geologie de Lyon, Lyon Cedex 07, France, Saemundur A Halldorsson, SIO-UCSD, La Jolla, CA, United States, Lori N Willhite, University of California Santa Barbara, Santa Barbara, CA, United States, Mark D Kurz, WHOI, Woods Hole, MA, United States, Kresten Breddam, National Institute of Radiation Protection, Copenhagen, Denmark, Ilya Bindeman, University of Oregon, Earth Sciences, Eugene, OR, United States, Sunna Harðardóttir, University of Iceland, NordVulk, Institute of Earth Sciences, Reykjavik, Iceland and Allison Price, UC Santa Barbara, Santa Barbara, CA, United States
Highly siderophile element and 187Os/188Os heterogeneity in the ~1.95 Ga Jormua Ophiolite, Finland: Implications for upper mantle budgets and evolution history (502578)
Val Finlayson1, Richard J Walker1, Mitchell Bruce Haller2, James M Day3, Brian O'Driscoll4, Asko Kontinen5 and Eero Hanski6, (1)University of Maryland College Park, Department of Geology, College Park, MD, United States, (2)Corning Inc., Corning, NY, United States, (3)Univ. California, San Diego, GRD, La Jolla, CA, United States, (4)University of Manchester, School of Earth and Environmental Sciences, Manchester, United Kingdom, (5)Geological Survey of Finland, Espoo, Finland, (6)University of Oulu, Oulu Mining School, Oulu, Finland
Sampling the Volatile Rich Transition Zone beneath Bermuda (Invited) (503287)
Sarah Mazza, Smith College, Northampton, MA, United States, Esteban Gazel, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, Michael Bizimis, University of South Carolina, School of the Earth, Ocean and the Environment, Columbia, SC, United States, Robert Moucha, Syracuse University, Syracuse, NY, United States, Elizabeth A Johnson, James Madison University, Department of Geology and Environmental Science, Harrisonburg, VA, United States, Ryan McAleer, USGS Geological Survey, Reston, VA, United States, Alexander V Sobolev, University Grenoble Alpes, ISTerre Institute of Earth Sciences, Grenoble, France and Paul Béguelin, University of South Carolina, Columbia, United States
Multiple Sulfur Isotopes Reveal a Possible Non-Crustal Source of Sulfur for the Bushveld Province (554664)
Nivea Magalhaes1, James Farquhar2, Grant Michael Bybee3, Sarah Penniston-Dorland2, Douglas Rumble4, Judith A Kinnaird3 and Matthew McCreesh3, (1)University of Toronto, Dept. of Earth Sciences, Toronto, ON, Canada, (2)University of Maryland College Park, College Park, MD, United States, (3)University of the Witwatersrand, School of Geosciences, Johannesburg, South Africa, (4)Carnegie Inst Washington, Washington, DC, United States
Constraining Mantle Source Conditions Beneath Iceland Using Markov Chain Monte Carlo Inversion (575149)
Eric Brown1, Kenni Dinesen Petersen2 and Charles E Lesher1,3, (1)Aarhus University, Centre of Earth System Petrology, Department of Geoscience, Aarhus, Denmark, (2)Aarhus University, Department of Geoscience, Aarhus, Denmark, (3)University of California Davis, Department of Earth & Planetary Sciences, Davis, CA, United States
Long-lived source heterogeneities in the Galapagos mantle plume (608201)
Esteban Gazel, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States, Alexander V Sobolev, University Grenoble Alpes, ISTerre Institute of Earth Sciences, Grenoble, France, Michael Bizimis, University of South Carolina, School of the Earth, Ocean and the Environment, Columbia, SC, United States, Cornelia Class, Lamont -Doherty Earth Observatory, Palisades, NY, United States and Brian R Jicha, University of Wisconsin Madison, Madison, WI, United States
