Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Laura Cobden"'
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-10 (2024)
Abstract Three-dimensional models of Earth’s seismic structure can be used to identify temperature-dependent phenomena, including mineralogical phase and spin transformations, that are obscured in 1-D spherical averages. Full-waveform tomography ma
Externí odkaz:
https://doaj.org/article/e24bc14bb85140a282dac8cfcb33b76b
Autor:
Frédéric Deschamps, Laura Cobden
Publikováno v:
Frontiers in Earth Science, Vol 10 (2022)
The temperature at Earth’s core-mantle boundary (CMB) is a key parameter to understand the dynamics of our planet’s interior. However, it remains poorly known, with current estimate ranging from about 3000 K to 4500 K and more. Here, we introduce
Externí odkaz:
https://doaj.org/article/b44eb0755de44bf087e62745f357bd1a
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 19, Iss 10, Pp 3892-3916 (2018)
Abstract In seismic tomography we map the wave speed structure inside the Earth, but we ultimately seek to interpret those images in terms of physical parameters. This is challenging because many parameters can trade‐off with each other to produce
Externí odkaz:
https://doaj.org/article/0e38a884510e4b8c8b543827f31f1be1
Joint interpretation of bulk and shear wave speeds constrains the chemistry of the deep mantle. At all depths the diversity of wave speeds cannot be explained by an isochemical mantle. Between 1000 and 2500 km depth, hypothetical mantle models contai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9471ad9d394ebaedced56b21d9dd821c
https://doi.org/10.21203/rs.3.rs-2848737/v1
https://doi.org/10.21203/rs.3.rs-2848737/v1
Publikováno v:
Mantle Convection and Surface Expressions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3cd8ba8b8e1f0c5a324064f5e6ea5c4
https://doi.org/10.1002/9781119528609.ch14
https://doi.org/10.1002/9781119528609.ch14
Publikováno v:
Geophysical Research Letters. 49
We conducted in situ high-pressure and -temperature X-ray diffraction measurements of a pyrolitic mantle material up to 4480 K at 122–166 GPa in a laser-heated diamond anvil cell. Results demonstrate that the phase transition between bridgmanite an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::345190ff28b8ce93e441d3968f31ceb0
https://doi.org/10.1029/2021gl096219
https://doi.org/10.1029/2021gl096219
Publikováno v:
2022 EGU General Assembly
Seismic tomographic models based only on wave velocities have limited ability to differentiate between a compositional or temperature origin for the Earth's 3D structure variations. Complementing wave velocities with attenuation (conversion of energy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec6e58b62e37fac10376ad57a8ad783e
Publikováno v:
Earth and Planetary Science Letters. 604:118011
The seismic wavefield, as recorded at the surface, carries information about the seismic source and Earth's structure along the seismic path, essential for the understanding of the interior of our planet. For 40 years seismic tomography studies have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::247c224ed6b94bba7af19ce1d10bc09f
https://doi.org/10.1016/j.epsl.2023.118011
https://doi.org/10.1016/j.epsl.2023.118011