Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics

Details Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics

May 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012geoji.189..730s&link_type=abstract

Geophysical Journal International, Volume 189, Issue 2, pp. 730-746.

Computer Science

Sound

Inverse Theory, Body Waves, Seismic Tomography, Dynamics Of Lithosphere And Mantle

Scientific paper

We propose an innovative approach to mapping CMB topography from seismic P-wave traveltime 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 parameters; nevertheless the corresponding mantle models fit the seismic data as well as the purely seismic ones.

Affiliated with

Also associated with

No associations

Rating

Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1551963