E. Debayle
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View article: A high attenuation layer around 1000 km depth
A high attenuation layer around 1000 km depth Open
International audience
View article: Global SV wave upper mantle model
Global SV wave upper mantle model Open
We present a summary of all our seismological models based on surface wave observations. First, wen have updated our global SV model that is based on the waveform modelling of more than 3 millions Rayleigh waves recorded since 1976. The to…
View article: Mapping depletion of continental roots with seismic waves.
Mapping depletion of continental roots with seismic waves. Open
High seismic velocity keels extending to depths greater than 200 km underlie the oldest parts of continents, the Precambrian cratons. Although mantle xenoliths suggests that these keels formed early in Earth’s history, the preservati…
View article: Global Lower Mantle Attenuation Model and the Origin of Lower Mantle Seismic Heterogeneities
Global Lower Mantle Attenuation Model and the Origin of Lower Mantle Seismic Heterogeneities Open
The details of heterogeneities in the lower mantle have increased considerably during the last decades thanks to seismic imaging revealing ULVZs, D” layer, PERM anomaly and now mega-ULVZs. However, the origin of these anomalies is ac…
View article: Global SV wave upper mantle model.
Global SV wave upper mantle model. Open
We present the latest update of the global SV model developed by our team, in Lyon. It is based on the waveform modeling of more than 3 millions Rayleigh waves recorded since 1976. The tomographic model is built using the same automated sc…
View article: Seismic evidence favoring depletion of Precambrian lithosphere and partial melt at the base of tectonic plates
Seismic evidence favoring depletion of Precambrian lithosphere and partial melt at the base of tectonic plates Open
Most global tomographic studies of the upper mantle and their thermochemical interpretations have focused on shear velocity (Vs). Shear attenuation has a different sensitivity to temperature, composition and melt content and therefore prov…
View article: Craton Formation by Underplating and Development of the MLD: Evidence from Bayesian Surface Wave Inversion 
Craton Formation by Underplating and Development of the MLD: Evidence from Bayesian Surface Wave Inversion  Open
Craton formation and evolution remains enigmatic because observations from long and short period seismic waves and geochemical data are inconsistent. For example, both internal layering and radial anisotropy are poorly constrained. By inve…
View article: Seismic Evidence for Craton Formation by Underplating and Development of the MLD
Seismic Evidence for Craton Formation by Underplating and Development of the MLD Open
Inconsistencies between observations from long and short period seismic waves and geochemical data mean craton formation and evolution remains enigmatic. Specifically, internal layering and radial anisotropy are poorly constrained. Here, w…
View article: An efficient algorithm to measure arrival times of weak seismic phases
An efficient algorithm to measure arrival times of weak seismic phases Open
SUMMARY In seismic tomography, traveltime information of seismic body phases is commonly used to invert the seismic velocities of the subsurface structure. At long periods or for later seismic phases, the arrival time of seismic phases lac…
View article: Seismic Evidence for Partial Melt Below Tectonic Plates
Seismic Evidence for Partial Melt Below Tectonic Plates Open
<p>The seismic low-velocity zone (LVZ) of the upper mantle is generally associated with a low-viscosity asthenosphere that has a key role in decoupling tectonic plates from the mantle. However, the origin of the LVZ remains unclear. …
View article: Global reference seismological data sets: multimode surface wave dispersion
Global reference seismological data sets: multimode surface wave dispersion Open
SUMMARY Global variations in the propagation of fundamental-mode and overtone surface waves provide unique constraints on the low-frequency source properties and structure of the Earth’s upper mantle, transition zone and mid mantle. We con…
View article: Quantifying Intrinsic and Extrinsic Contributions to Radial Anisotropy in Tomographic Models
Quantifying Intrinsic and Extrinsic Contributions to Radial Anisotropy in Tomographic Models Open
Seismic anisotropy in the Earth's mantle inferred from seismic observations is usually interpreted in terms of intrinsic anisotropy due to crystallographic preferred orientation (CPO) of minerals, or extrinsic anisotropy due to shape prefe…
View article: Quantifying Intrinsic and Extrinsic Contributions to Seismic Anisotropy in Tomographic Models
Quantifying Intrinsic and Extrinsic Contributions to Seismic Anisotropy in Tomographic Models Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Journal of Geophysical Research - Solid Earth. ESSOAr is a venue for early communication or feedback before peer review. Data may be pre…
View article: RÉSIF-SI: A Distributed Information System for French Seismological Data
RÉSIF-SI: A Distributed Information System for French Seismological Data Open
The Résif project, which started in 2008, aims at gathering under a common research infrastructure the French seismological, Global Navigation Satellite Systems and gravimeter permanent networks, as well as the mobile instrument pools. A c…
View article: Radial Anisotropy and it's Relation to Fast and Slow Moving Tectonic Plates
Radial Anisotropy and it's Relation to Fast and Slow Moving Tectonic Plates Open
<p>We present a new radially anisotropic (<strong>&#958;)</strong>&#160;tomographic model for the upper mantle to transition zone depths derived from a large Rayleigh (~4.5 x 10<sup>6&#160;</sup>pa…
View article: Evidence for radial anisotropy in the lower crust of the Apennines from Bayesian ambient noise tomography in Europe
Evidence for radial anisotropy in the lower crust of the Apennines from Bayesian ambient noise tomography in Europe Open
SUMMARY Probing seismic anisotropy of the lithosphere provides valuable clues on the fabric of rocks. We present a 3-D probabilistic model of shear wave velocity and radial anisotropy of the crust and uppermost mantle of Europe, focusing o…
View article: Radial anisotropy in Europe from surface waves ambient noise tomography and transdimensional hierarchical inversion
Radial anisotropy in Europe from surface waves ambient noise tomography and transdimensional hierarchical inversion Open
<p>We present a 3D probabilistic model of shear wave velocity and radial anisotropy of the European crust and uppermost mantle mainly focusing on the Alps and the Apennines.</p><p>The model is built using continuous seism…
View article: Global imaging of the lithosphere-asthenosphere system
Global imaging of the lithosphere-asthenosphere system Open
<p>Massive surface wave datasets constrain upper mantle seismic heterogeneities with horizontal wavelengths larger than 1000 km, allowing us to investigate the large-scale properties and alignment of olivine crystals in the lithosphe…
View article: Confirmation of a change in the global shear velocity pattern at around 1000 km depth
Confirmation of a change in the global shear velocity pattern at around 1000 km depth Open
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View article: Quantifying seismic anisotropy induced by small-scale chemical heterogeneities
Quantifying seismic anisotropy induced by small-scale chemical heterogeneities Open
cited By 2; Observations of seismic anisotropy are usually used as a proxy for lattice-preferred orientation (LPO) of anisotropic minerals in the Earth's mantle. In this way, seismic anisotropy observed in tomographic models provides impor…
View article: Attenuation tomography of the upper mantle
Attenuation tomography of the upper mantle Open
We present QsADR17, a global shear wave attenuation model of the upper mantle. Synthetic tests confirm that large‐scale shear attenuation anomalies are resolved in the whole upper mantle with limited vertical smearing (≤50 km). QsADR17 sho…
View article: Seismic evidence for broad attenuation anomalies in the asthenosphere beneath the Pacific Ocean
Seismic evidence for broad attenuation anomalies in the asthenosphere beneath the Pacific Ocean Open
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View article: A global horizontal shear velocity model of the upper mantle from multimode Love wave measurements
A global horizontal shear velocity model of the upper mantle from multimode Love wave measurements Open
Surface wave studies in the 1960s provided the first indication that the upper mantle was radially anisotropic. Resolving the anisotropic structure is important because it may yield information on deformation and flow patterns in the upper…
View article: Seismic evidence for a change in the large‐scale tomographic pattern across the <i>D</i>′′ layer
Seismic evidence for a change in the large‐scale tomographic pattern across the <i>D</i>′′ layer Open
We present SEISGLOB1, a pure SV tomographic model of Earth's mantle based on Rayleigh phase velocities and normal mode self‐ and cross‐coupling data. SEISGLOB1 is the first model that incorporates the cross‐coupling of normal modes since t…