FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3182099475> ?p ?o ?g. }

• W3182099475 abstract "&lt;p&gt;Despite the well-established anisotropic nature of Earth&amp;#8217;s upper mantle, the influence of elastic anisotropy on teleseismic tomographic images remains largely ignored. In subduction zones, unmodeled anisotropic heterogeneity can lead to substantial isotropic velocity artefacts that may be misinterpreted as compositional heterogeneities (e.g. Bezada et al., 2016). Recent studies have demonstrated the possibility of inverting P-wave delay times for the strength and orientation of seismic anisotropy assuming a hexagonal symmetry system (e.g. Huang et al., 2015; Munzarov&amp;#225; et al., 2018). However, the ability of P-wave delay times to constrain complex anisotropic patterns, such as those expected in subduction settings, remains unclear as the aforementioned methods are tested using ideal self-consistent data (i.e. data produced using the assumptions built into the tomography algorithm) generated from simplified synthetic models. Here, we test anisotropic P-wave imaging methods on data generated from geodynamic simulations of subduction. Micromechanical models of polymineralic aggregates advected through the simulated flow field are used to create an elastic model with up to 21 independent coefficients. We then model the teleseismic wavefield through this fully anisotropic model using SPECFEM3D coupled with AxiSEM. P-wave delay times across a synthetic seismic array are measured using conventional cross-correlation techniques and inverted for isotropic velocity and the strength and orientation of anisotropy using travel-time tomography methods. We propose and validate approximate analytic finite-frequency sensitivity kernels for the simplified anisotropic parameters. Our results demonstrate that P-wave delays can reliably recover horizontal and vertical changes in the azimuth of anisotropy. However, substantial isotropic artefacts remain in the solution when only inverting for azimuthal anisotropy parameters. These isotropic artefacts are largely removed when inverting for the dip as well as the azimuth of the anisotropic symmetry axis. Due to the relative nature of P-wave delay times, these data generally fail to reconstruct anisotropic structure that is spatially uniform over large scales. To overcome this limitation, we propose a joint inversion of SKS splitting intensity with P-wave delay times. Preliminary results demonstrate that this approach improves the recovery of the magnitude and azimuth of anisotropy. We conclude that teleseismic P-wave travel-times are a useful observable for probing the 3D distribution of upper mantle anisotropy and that anisotropic inversions should be explored to better understand the nature of isotropic velocity anomalies in subduction settings.&lt;/p&gt;" @default.
• W3182099475 created "2021-07-19" @default.
• W3182099475 creator A5008067212 @default.
• W3182099475 creator A5072554360 @default.
• W3182099475 date "2020-03-23" @default.
• W3182099475 modified "2023-09-24" @default.
• W3182099475 title "Can Teleseismic Travel-Times Constrain 3D Anisotropic Structure in Subduction Zones? Insights from Realistic Synthetic Experiments" @default.
• W3182099475 doi "https://doi.org/10.5194/egusphere-egu2020-14886" @default.
• W3182099475 hasPublicationYear "2020" @default.
• W3182099475 type Work @default.
• W3182099475 sameAs 3182099475 @default.
• W3182099475 citedByCount "2" @default.
• W3182099475 countsByYear W31820994752020 @default.
• W3182099475 crossrefType "posted-content" @default.
• W3182099475 hasAuthorship W3182099475A5008067212 @default.
• W3182099475 hasAuthorship W3182099475A5072554360 @default.
• W3182099475 hasConcept C120665830 @default.
• W3182099475 hasConcept C121332964 @default.
• W3182099475 hasConcept C122959257 @default.
• W3182099475 hasConcept C127313418 @default.
• W3182099475 hasConcept C16345878 @default.
• W3182099475 hasConcept C163716698 @default.
• W3182099475 hasConcept C165205528 @default.
• W3182099475 hasConcept C184050105 @default.
• W3182099475 hasConcept C23148476 @default.
• W3182099475 hasConcept C2524010 @default.
• W3182099475 hasConcept C33923547 @default.
• W3182099475 hasConcept C58097730 @default.
• W3182099475 hasConcept C67236022 @default.
• W3182099475 hasConcept C77928131 @default.
• W3182099475 hasConcept C8058405 @default.
• W3182099475 hasConcept C85725439 @default.
• W3182099475 hasConceptScore W3182099475C120665830 @default.
• W3182099475 hasConceptScore W3182099475C121332964 @default.
• W3182099475 hasConceptScore W3182099475C122959257 @default.
• W3182099475 hasConceptScore W3182099475C127313418 @default.
• W3182099475 hasConceptScore W3182099475C16345878 @default.
• W3182099475 hasConceptScore W3182099475C163716698 @default.
• W3182099475 hasConceptScore W3182099475C165205528 @default.
• W3182099475 hasConceptScore W3182099475C184050105 @default.
• W3182099475 hasConceptScore W3182099475C23148476 @default.
• W3182099475 hasConceptScore W3182099475C2524010 @default.
• W3182099475 hasConceptScore W3182099475C33923547 @default.
• W3182099475 hasConceptScore W3182099475C58097730 @default.
• W3182099475 hasConceptScore W3182099475C67236022 @default.
• W3182099475 hasConceptScore W3182099475C77928131 @default.
• W3182099475 hasConceptScore W3182099475C8058405 @default.
• W3182099475 hasConceptScore W3182099475C85725439 @default.
• W3182099475 hasLocation W31820994751 @default.
• W3182099475 hasOpenAccess W3182099475 @default.
• W3182099475 hasPrimaryLocation W31820994751 @default.
• W3182099475 hasRelatedWork W101251175 @default.
• W3182099475 hasRelatedWork W1978119136 @default.
• W3182099475 hasRelatedWork W1978838820 @default.
• W3182099475 hasRelatedWork W2073140481 @default.
• W3182099475 hasRelatedWork W2076039380 @default.
• W3182099475 hasRelatedWork W2154788921 @default.
• W3182099475 hasRelatedWork W2310496585 @default.
• W3182099475 hasRelatedWork W2531081124 @default.
• W3182099475 hasRelatedWork W2884509343 @default.
• W3182099475 hasRelatedWork W4322006759 @default.
• W3182099475 isParatext "false" @default.
• W3182099475 isRetracted "false" @default.
• W3182099475 magId "3182099475" @default.
• W3182099475 workType "article" @default.