Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9993
Authors: Soldati, G.* 
Boschi, L.* 
Forte, A.* 
Title: Tomography of core–mantle boundary and lowermost mantle coupled by geodynamics
Journal: Geophysical Journal International 
Series/Report no.: /189 (2012)
Publisher: Wiley-Blackwell
Issue Date: 2012
DOI: 10.1111/j.1365-246X.2012.05413.x
Keywords: Seismic tomography
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.03. Mantle and Core dynamics 
Abstract: We propose an innovative approach to mapping CMB topography from seismic P-wave trav- eltime inversions: instead of treating mantle velocity and CMB topography as independent parameters, as has been done so far, we account for their coupling by mantle flow, as formulated by Forte & Peltier. This approach rests on the assumption that P data are sufficiently sensitive to thermal heterogeneity, and that compositional heterogeneity, albeit important in localized regions of the mantle (e.g. within the D′′ region), is not sufficiently strong to govern the pattern of mantle-wide convection and hence the CMB topography. The resulting tomographic maps of CMB topography are physically sound, and they resolve the known discrepancy between images obtained from classic tomography on the basis of core-reflected and core-refracted seismic phases. Since the coefficients of mantle velocity structure are the only free parameters of the inversion, this joint tomography–geodynamics approach reduces the number of param- eters; nevertheless the corresponding mantle models fit the seismic data as well as the purely seismic ones.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat Existing users please Login
2012 soldati et al GJI (tomogeo).pdfMain article21.76 MBAdobe PDF
Show full item record

WEB OF SCIENCETM
Citations

22
checked on Feb 10, 2021

Page view(s) 20

333
checked on Mar 27, 2024

Download(s) 50

90
checked on Mar 27, 2024

Google ScholarTM

Check

Altmetric