Using MOMA broadband array ScS-S data to image smaller-scale structures at the base of the mantle

Details Using MOMA broadband array ScS-S data to image smaller-scale structures at the base of the mantle Using MOMA broadband array ScS-S data to image smaller-scale structures at the base of the mantle

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28..867w&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 5, p. 867-870

Physics

13

Seismology: Body Wave Propagation, Seismology: Core And Mantle, Tectonophysics: Dynamics Of Lithosphere And Mantle-General, Tectonophysics: Earth'S Interior-Composition And State

Scientific paper

ScS-S residuals obtained at stations of the Missouri-to-Massachusetts (MOMA) temporary broadband seismic array are used to delineate variations in seismic velocity structure above the core-mantle boundary (CMB) at scales smaller than observable with tomographic models. South American earthquakes recorded at MOMA reveal a slow-velocity anomaly that is at least as small as the limit of the resolution of ScS waves, about 300 km across. This is modeled as being within a region of fast velocities in whole-mantle models. The slow ScS-S residuals correlate well with a peak in ScS/S relative amplitudes. The small region of slow shear velocity at the CMB could be a pocket to lower mantle rock trapped beneath the descending Farallon slab, or evidence of chemical boundary layer variations.

Affiliated with

Also associated with

No associations

Rating

Using MOMA broadband array ScS-S data to image smaller-scale structures at the base of the mantle 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 Using MOMA broadband array ScS-S data to image smaller-scale structures at the base of the mantle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Using MOMA broadband array ScS-S data to image smaller-scale structures at the base of the mantle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1006763