Physics – Geophysics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3720312s&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 20, CiteID L20312
Physics
Geophysics
4
Seismology: Seismicity And Tectonics (1207, 1217, 1240, 1242), History Of Geophysics: Volcanology, Geochemistry, And Petrology, Tectonophysics: Dynamics Of Lithosphere And Mantle: General (1213), Tectonophysics: Rheology: Mantle (8033)
Scientific paper
Peridotite xenoliths from southern Texas consist of spinel lherzolite, harzburgite and minor dunite. Based on phase relations and temperature of equilibration, Knippa xenoliths come from the uppermost mantle, 40-70 km deep. Knippa xenoliths provide rare snapshots of upper mantle processes and compositions beneath south-central Laurentia. They preserve olivine a-axis fiber fabrics with a strong concentration of [100] and girdles of [010] and [001]. Assuming a lithospheric mantle having a horizontal flow direction parallel to fast directions, the mantle lithospheric fabric revealed by the xenoliths mostly explains the magnitude of observed shear-wave splitting observed along the southern margin of the Laurentian craton.
Anthony Elizabeth Y.
Michibayashi Katsuyoshi
Pulliam Jay
Raye Urmidola
Satsukawa Takako
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