Azimuthal anisotropy in the upper mantle from observations ofP-to-S converted phases: application to southeast Australia

Details Azimuthal anisotropy in the upper mantle from observations ofP-to-S converted phases: application to southeast Australia Azimuthal anisotropy in the upper mantle from observations ofP-to-S converted phases: application to southeast Australia

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998geoji.133..615g&link_type=abstract

Geophysical Journal International, Volume 133, Issue 3, pp. 615-629.

Physics

24

Scientific paper

Converted-waves analysis is used to map the anisotropy as a function of depth in the upper mantle. Stacking of SV- and T-component records of several seismic events well distributed in azimuth helps to detect these converted waves. Weighting coefficients are used to extract the anisotropic signal in the records. Synthetic examples show that a harmonic analysis helps to separate azimuthal anisotropy effects from the effects of lateral heterogeneity, such as those resulting from dipping structures. A good azimuthal coverage of the data set is important in order to separate the different effects in the stack sections obtained for different azimuthal orders. The procedure is applied to data observed at GEOSCOPE station CAN and gives a model with two anisotropic layers in the upper mantle. The upper layer, located between the crust and a depth of 140 km, has its fast axis in an east-west direction. The lower layer, 40 km thick, has its fast axis in a north-south direction. The fast axis directions are in agreement with results obtained from surface-wave analysis and tectonic information.

Affiliated with

Also associated with

No associations

Rating

Azimuthal anisotropy in the upper mantle from observations ofP-to-S converted phases: application to southeast Australia 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 Azimuthal anisotropy in the upper mantle from observations ofP-to-S converted phases: application to southeast Australia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Azimuthal anisotropy in the upper mantle from observations ofP-to-S converted phases: application to southeast Australia will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1331955