Solid Earth Sciences(S)
Session Sub-categoryScience of the Earth's Interior & Tectonophysics
Session IDS-IT28
TitleThe lithosphere and the asthenosphere
Short TitleLithosphere and asthenosphere
Main ConvenerNameCatherine Rychert
AffiliationUniversity of Southampton
Co-Convener 1NameHitoshi Kawakatsu
AffiliationEarthquake Research Institute, University of Tokyo
Co-Convener 2NameSamer Naif
AffiliationLamont Doherty Earth Observatory
Co-Convener 3NameJessica M Warren
AffiliationUniversity of Delaware
Session LanguageEE
ScopeThe lithosphere-asthenosphere boundary (LAB) separates Earth's rigid tectonic plates from the underlying convecting mantle. The LAB is fundamental to our understanding of plate tectonics and mantle dynamics, although its depth and defining mechanism are highly debated. How it varies among tectonic environments and its relationship to the Moho, MLD, and anisotropy are also poorly understood. Ocean bottom seismic data is particularly important for constraining the young plate with relatively simple history, although this data is difficult to attain and rare. We will focus on the lithosphere, the asthenosphere, and the lithosphere-asthenosphere system in a variety of settings including but not limited to continents, oceans, margins, rifts, ridges, hotspots, plumes, and subduction zones. We welcome research contributions from diverse fields, including but not limited to seismology, magnetotellurics, petrology/mineralogy, dynamical modelling, and mineral physics.
Presentation FormatOral and Poster presentation
Joint Session withAGU, EGU
Invited Authors
  • J Michael Kendall (University of Bristol)
  • Thorsten W Becker (Institute for Geophysics and Department of Geological Sciences, Jackson School of Goesciences, The University of Texas at Austin)
  • Zhitu Ma (Brown University)
  • Nozomu Takeuchi (Earthquake Research Institute, University of Tokyo)
  • Hatsuki Yamauchi (Earthquake Research Institute, The University of Tokyo)
  • Whitney M Behr (Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin)
Time Presentation No Title Presenter Abstract
Oral Presentation May 22 PM1
13:45 - 14:00 SIT28-01Trans-dimensional Bayesian inversion for the crust and upper mantle using Ps/Sp receiver functions and multi-mode surface wavesToru Taira Abstract
14:00 - 14:15 SIT28-02Anisotropy of the upper mantle beneath Mid-Atlantic Ridge: Results from the PiLAB experimentJ Michael Kendall Abstract
14:15 - 14:30 SIT28-03Mismatch between SKS splitting and flow model predictions for densely sampled continental plates challenges our understanding of the structure of the lithosphere and asthenospheric dynamicsThorsten W Becker Abstract
14:30 - 14:45 SIT28-04Imaging the crust and mantle beneath the equatorial Mid-Atlantic Ridge using the PI-LAB experimentCatherine Rychert Abstract
14:45 - 15:00 SIT28-05Geophysical observations reveal dehydration-modulated small-scale convection beneath oceansZhitu Ma Abstract
15:00 - 15:15 SIT28-06Determination of Intrinsic Attenuation in the Oceanic Lithosphere-Asthenosphere SystemNozomu Takeuchi Abstract
Oral Presentation May 22 PM2
15:30 - 15:45 SIT28-07Application of a new anelasticity model to the seismic discontinuity at the lithosphere-asthenosphere boundaryHatsuki Yamauchi Abstract
15:45 - 16:00 SIT28-08Does olivine LPO systematically scale with water and stress in naturally deformed rocks?Whitney M Behr Abstract
16:00 - 16:15 SIT28-09Anisotropic high-temperature plasticity of wet single crystal olivine and its geodynamic implicationsSagar Shrishailappa Masuti Abstract
16:15 - 16:30 SIT28-10Diffusion creep in the oceanic lithosphere and asthenosphereTakehiko Hiraga Abstract
16:30 - 16:45 SIT28-11Dynamic processes in lithosphere-asthenosphere boundary zone; rheological structure from Ichinomegata mantle xenolithsYuto Sato Abstract
16:45 - 17:00 SIT28-12Thermal and kinematic history of subcontinental lithosphere: Mantle xenoliths from Colorado plateau and Rio Grande riftSaeri Narita Abstract
Presentation No Title Presenter Abstract
Poster Presentation May 22 Core Time
SIT28-P01 Unexpected consequences of transverse isotropy Hitoshi Kawakatsu Abstract
SIT28-P02 Inversions for radially anisotropic upper mantle structure with the new fifth anisotropic parameter ηκ using multi-mode surface waves Shuya Okuyama Abstract
SIT28-P03 VTI mantle structure under the northeast Pacific ocean Jumpei Maruyama Abstract
SIT28-P04 Upper mantle structure beneath the Pacific Ocean revealed from seafloor and land broadband seismic observations Takehi Isse Abstract
SIT28-P05 Phase speed and arrival angle measurements of multi-mode surface waves with array-based analysis Hitoshi Matsuzawa Abstract
SIT28-P06 A probabilistic approach to surface waves tomography of the upper mantle and lithosphere/asthenosphere boundary characterization Gaël Burgos Abstract
SIT28-P07 Measurements of Rayleigh-wave particle motions: Implication for crust and upper mantle structure beneath the Japanese islands Kazunori Yoshizawa Abstract
SIT28-P08 Construction of stable S receiver function and its application to observations of seismic discontinuities in the lithosphere-asthenosphere system beneath South Korea Younghee Kim Abstract
SIT28-P09 Numerical modelling of volatiles in Earth's mantle Philipp Eichheimer Abstract
SIT28-P10 Preliminary study using harmonic decomposition of receiver functions to image non-isotropic characteristics of Japan subduction zone HyeJeong Kim Abstract
SIT28-P11 Discordance between P- and S-wave tomography models using ISC travel time data Misaki Horiuchi Abstract
SIT28-P12 Thermal evolution of lithosphere-asthenosphere boundary; direct observation from the Lanzo massif, western Alps, Italy Tomo Aoki Abstract