DI24A:
Multidisciplinary Views of the Lithosphere-Asthenosphere Boundary and Lithospheric Discontinuities II
DI24A:
Multidisciplinary Views of the Lithosphere-Asthenosphere Boundary and Lithospheric Discontinuities II
Multidisciplinary Views of the Lithosphere-Asthenosphere Boundary and Lithospheric Discontinuities II
Session ID#: 8001
Session Description:
There has been a rapid expansion in the number of geophysical studies that detect evidence for abrupt changes in the physical properties at the lithosphere-asthenosphere boundary (LAB) and at additional boundaries within the cratonic and oceanic lithosphere. These mid-lithosphere discontinuities (MLD) and LAB associated boundaries are being discovered in many localities across the globe, though the mechanism(s) underlying the drop in seismic wavespeed, changes in electrical conductivity, and relationship of these observed properties to a rheological transition remain enigmatic. A multidisciplinary approach is fundamental for unraveling the role(s) of partial melt, dissolved water, seismic anisotropy, and/or mineral composition at both the LAB and MLDs. This research is yielding new insights into the growth, stability, alteration, and destruction of plates. Our session welcomes contributions from geophysics (seismology. magnetotellurics, gravity, rheology), geology, geochemistry, mineral physics, and geodynamics that investigate the nature of the LAB/MLD.
Primary Convener: Christopher Havlin, Lamont-Doherty Earth Observatory, Palisades, NY, United States
Conveners: Nicholas C Schmerr, University of Maryland College Park, Department of Geology, College Park, United States, Zhengyu Cai, University of Maryland College Park, College Park, MD, United States and Anna Kelbert, Harvard-Smithsonian Center for Astrophysics, Science Explorer (SciX), Cambridge, MA, United States
Chairs: Christopher Havlin, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Anna Kelbert, Geologic Hazards Science Center Denver, Denver, CO, United States
OSPA Liaison: Christopher Havlin, Lamont-Doherty Earth Observatory, Palisades, NY, 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:
1038 Mantle processes [GEOCHEMISTRY]
7218 Lithosphere [SEISMOLOGY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8124 Earth's interior: composition and state [TECTONOPHYSICS]
Abstracts Submitted to this Session:
The Electrical Structure of the 70Ma Pacific LAB Constrained by the NoMelt Experiment (Invited) (48378)
See more of: Study of Earth's Deep Interior