Universidad Complutense de Madrid
E-Prints Complutense

Candy wrapper for the Earth's inner core

Impacto

Descargas

Último año

Mattesini, Maurizio y Belonoshko, A.B. y Tkalčić, H. y Buforn Peiró, Elisa y Udías Vallina, Agustín y Ahuja, R. (2013) Candy wrapper for the Earth's inner core. Scientific reports, 3 . ISSN 2045-2322

[img]
Vista previa
PDF
Creative Commons License
Esta obra está bajo una licencia de Creative Commons: Reconocimiento.

1MB

URL Oficial: http://dx.doi.org/10.1038/srep02096


URLTipo de URL
http://www.nature.com/Editorial


Resumen

Recent global expansion of seismic data motivated a number of seismological studies of the Earth’s inner core that proposed the existence of increasingly complex structure and anisotropy. In the meantime, new hypotheses of dynamic mechanisms have been put forward to interpret seismological results. Here, the nature of hemispherical dichotomy and anisotropy is re-investigated by bridging the observations of PKP(bc-df) differential travel-times with the iron bcc/hcp elastic properties computed from first-principles methods.The Candy Wrapper velocity model introduced here accounts for a dynamic picture of the inner core (i.e., the eastward drift of material), where different iron crystal shapes can be stabilized at the two hemispheres. We show that seismological data are best explained by a rather complicated, mosaic-like, structure of the inner core, where well-separated patches of different iron crystals compose the anisotropic western hemispherical region, and a conglomerate of almost indistinguishable iron phases builds-up the weakly anisotropic eastern side.


Tipo de documento:Artículo
Información Adicional:

© The authors. The work of M.M., E.B. and A.U. is partially supported by the Spanish Ministry of Science and Innovation (CGL 2010-19803-C03-01). R.A. (VR project 2012-4379) and A.B.B. (VR project 2010-3187) acknowledge financial support from the Swedish Research Council.

Palabras clave:Travel-times; Elastic-anisotropy; Seismic velocity; AB-initio; Iron; Pressure; Constraints; Attenuation; Heterogeneity; Temperature.
Materias:Ciencias > Física > Geofísica
Ciencias > Física > Meteorología
Código ID:29453
Depositado:13 Abr 2015 15:16
Última Modificación:13 Abr 2015 15:16

Descargas en el último año

Sólo personal del repositorio: página de control del artículo