T43A:
Multidisciplinary Perspectives on the Continental Mantle Lithosphere and Lithosphere-Asthenosphere Boundary II

Submit an Abstract to this Session

Session ID#: 6847

Session Description:
In the last several decades, multi-disciplinary programs (e.g., Lithoprobe, Earthscope) have provided new insights into the structure of the continental lithosphere and the nature of the lithosphere-asthenosphere boundary (LAB). Instead of being a homongenous region of stable lithosphere, continental mantle lithosphere exhibits internal layering, lateral variations in composition and thickness, episodic destabilization, and often has a complex lower boundary. The nature of this lower boundary—the LAB—remains elusive despite numerous studies utilzing various geophysical, geochemical, and petrological techniques. Such studies have demonstrated the LAB likely consists of a boundary (or gradient) in composition, temperature, anisotropy, resistivity, hydration and/or small volumes of melt.

In this session we invite abstracts which address the structure, evolution, and dynamics of the continental lithosphere, and the nature of the LAB, dervied from a range of geophysical and geological perspectives, including seismology, geodynamic modelling, electromagnetics, geochemistry, and petrology.

OSPA Liaison:  Andrew J Schaeffer, Dublin Institute for Advanced Studies, Dublin, Ireland
Chairs:  Claire A Currie, University of Alberta, Department of Physics, Edmonton, AB, Canada and Yu Jeffrey Gu, University of Alberta, Department of Physics, Edmonton, AB, Canada
Primary Convener:  Andrew J Schaeffer, Dublin Institute for Advanced Studies, Dublin, Ireland
Conveners:  Claire A Currie1, Yu Jeffrey Gu1 and Christy B. Till2, (1)University of Alberta, Department of Physics, Edmonton, AB, Canada(2)Arizona State University, School of Earth & Space Exploration, Tempe, AZ, United States
Index Terms:

7218 Lithosphere [SEISMOLOGY]
8103 Continental cratons [TECTONOPHYSICS]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8124 Earth's interior: composition and state [TECTONOPHYSICS]
Co-Sponsor(s):
  • S - Seismology
  • SE - Solid Earth
  • VGP - Volcanology, Geochemistry, and Petrology

Abstracts Submitted to this Session:

T43A-01
Pockets, conduits, channels, and plumes: structures beneath and within the continental lithosphere beneath western Mediterranean (Invited) (33953)
M Meghan Miller1, Daoyuan Sun2, Leland O'Driscoll1, Thorsten W Becker3, Adam Holt4, Jordi Diaz5 and Christine Thomas6, (1)University of Southern California, Los Angeles, CA, United States, (2)University of Science and Technology of China, Hefei, China, (3)University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States, (4)University of Miami, Rosenstiel School of Marine, Atmospheric, and Earth Science, Miami, FL, United States, (5)ICTJA-CSIC, Barcelona, Spain, (6)University of Münster, Institut of Geophysics, Münster, Germany
T43A-02
Deformation within continental plates: Surface deflection and magmatism induced by lithosphere removal (35257)
Huilin Wang, University of Alberta, Edmonton, AB, Canada and Claire A Currie, University of Alberta, Department of Physics, Edmonton, AB, Canada
T24B-0386
Sharp Mantle Tansition from Cratons to Cordillera in Southwestern Canada (36557)
Yu Jeffrey Gu, University of Alberta, Department of Physics, Edmonton, AB, Canada, Yuanyin Zhang, University of Alberta, Edmonton, AB, Canada, Mauricio D Sacchi, University of Alberta, Physics, Edmonton, AB, Canada and Yunfeng Chen, Zhejiang University, School of Earth Sciences, Hangzhou, China
T43A-04
Plate Tectonics Beyond Plate Boundaries: The Role of Ancient Structures in Continental Lithosphere on Intraplate Orogenesis (33614)
Philip Heron, University of Toronto, Physical and Environmental Sciences, Toronto, ON, Canada, Russell Pysklywec, University of Toronto, Department of Earth Sciences, Toronto, ON, Canada and Randell Stephenson, University of Aberdeen, Aberdeen, United Kingdom
T43A-05
Lithospheric and Upper Mantle Stratifications Beneath Colombia: Using Receiver Functions from S Waves. (33075)
Jose Faustino Blanco Chia, National University of Colombia, Bogotá, Colombia and Carlos Alberto Vargas Jiménez, Universidad Nacional de Colombia, Bogotá D.C., Geosciences, Bogotá D.C., Colombia
T43A-06
India’s Fast Mesozoic Drift Linked to Continental Mantle Lithosphere Delamination: New Insights From (U-Th)/He Thermochronology of Dharwar Craton Kimberlites (34748)
Sebastian Tappe1,2, Manoko Marokane2, Jaclyn S Baughman3, Rebecca Marie Flowers4, Katie A Smart2, Bruce M Eglington5 and Sojen Joy1, (1)De Beers Group Exploration, Johannesburg, South Africa, (2)University of the Witwatersrand, School of Geosciences, Johannesburg, South Africa, (3)University of Colorado at Boulder, Boulder, CO, United States, (4)University of Colorado at Boulder, Department of Geological Sciences, Boulder, United States, (5)University of Saskatchewan, Geological Sciences, Saskatoon, SK, Canada
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