Seismic anisotropy in the mantle transition zone beneath Fiji-Tonga

Details Seismic anisotropy in the mantle transition zone beneath Fiji-Tonga Seismic anisotropy in the mantle transition zone beneath Fiji-Tonga

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30m..15c&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 13, pp. 15-1, CiteID 1682, DOI 10.1029/2002GL016330

Physics

19

Seismology: Body Wave Propagation, Mineralogy And Petrology: General Or Miscellaneous, Seismology: Core And Mantle, Tectonophysics: Dynamics Of Lithosphere And Mantle-General, Tectonophysics: Earth'S Interior-Composition And State (1212)

Scientific paper

We demonstrate a rare, unequivocal case of anisotropy in the transition zone (TZ), evident from many horizontal-polarized shear-waves (SH) that arrive up to 3 s earlier than vertical-polarized shear-waves (SV). The anisotropic region correlates with deep earthquakes away from the active subduction zone and known boundaries of lateral heterogeneities in compression- and shear-wave speeds. We interpret the anisotropy as strong fabric associated with a large petrologic anomaly in the core of remnant lithosphere which is buoyant and stagnates in the TZ. Fast subduction of cold slab actually favors such a configuration, so slab penetration into the lower mantle does not uniformly occur.

Affiliated with

Also associated with

No associations

Rating

Seismic anisotropy in the mantle transition zone beneath Fiji-Tonga 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 Seismic anisotropy in the mantle transition zone beneath Fiji-Tonga, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Seismic anisotropy in the mantle transition zone beneath Fiji-Tonga will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1467351