Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/127315
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Strong, Multi-Scale Heterogeneity in Earth’s Lowermost Mantle |
Autor: | Tkalčić, Hrvoje; Young, Mallory; Muir, Jack B.; Davies, D. Rhodri; Mattesini, Maurizio CSIC ORCID ; Mattesini, Maurizio CSIC ORCID | Palabras clave: | Geophysics Seismology Manto terrestre Earth's mantle |
Fecha de publicación: | 17-dic-2015 | Editor: | Nature Publishing Group | Citación: | Scientific Reports, 5: 18416 (2015) | Resumen: | The core mantle boundary (CMB) separates Earth’s liquid iron outer core from the solid but slowly convecting mantle. The detailed structure and dynamics of the mantle within ~300 km of this interface remain enigmatic: it is a complex region, which exhibits thermal, compositional and phase-related heterogeneity, isolated pockets of partial melt and strong variations in seismic velocity and anisotropy. Nonetheless, characterising the structure of this region is crucial to a better understanding of the mantle’s thermo-chemical evolution and the nature of core-mantle interactions. In this study, we examine the heterogeneity spectrum from a recent P-wave tomographic model, which is based upon trans-dimensional and hierarchical Bayesian imaging. Our tomographic technique avoids explicit model parameterization, smoothing and damping. Spectral analyses reveal a multi-scale wavelength content and a power of heterogeneity that is three times larger than previous estimates. Inter alia, the resulting heterogeneity spectrum gives a more complete picture of the lowermost mantle and provides a bridge between the long-wavelength features obtained in global S-wave models and the short-scale dimensions of seismic scatterers. The evidence that we present for strong, multi-scale lowermost mantle heterogeneity has important implications for the nature of lower mantle dynamics and prescribes complex boundary conditions for Earth’s geodynamo. | Versión del editor: | http://dx.doi.org/10.1038/srep18416 | URI: | http://hdl.handle.net/10261/127315 | DOI: | 10.1038/srep18416 | ISSN: | 2045-2322 | E-ISSN: | 2045-2322 |
Aparece en las colecciones: | (IGEO) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
SR_2015_5_18416.pdf | 1,87 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
1
checked on 06-abr-2024
SCOPUSTM
Citations
29
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
26
checked on 28-feb-2024
Page view(s)
265
checked on 18-abr-2024
Download(s)
232
checked on 18-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Artículos relacionados:
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.