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Mantle flow and lithosphere-asthenos...

Refayee, Hesham Ahmad.

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Mantle flow and lithosphere-asthenosphere coupling beneath the southwestern edge of the North American craton: Constraints from shear-wave splitting measurements.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Mantle flow and lithosphere-asthenosphere coupling beneath the southwestern edge of the North American craton: Constraints from shear-wave splitting measurements./
Author:	Refayee, Hesham Ahmad.
Description:	91 p.
Notes:	Source: Dissertation Abstracts International, Volume: 74-07(E), Section: B.
Contained By:	Dissertation Abstracts International74-07B(E).
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3537402
ISBN:	9781267970787

Mantle flow and lithosphere-asthenosphere coupling beneath the southwestern edge of the North American craton: Constraints from shear-wave splitting measurements.
Refayee, Hesham Ahmad.

Mantle flow and lithosphere-asthenosphere coupling beneath the southwestern edge of the North American craton: Constraints from shear-wave splitting measurements. - 91 p.

Source: Dissertation Abstracts International, Volume: 74-07(E), Section: B.

Thesis (Ph.D.)--Missouri University of Science and Technology, 2012.

High-quality broadband seismic data recorded by the USArray and other stations in the southwestern United States provide a unique opportunity to test different models of anisotropy-forming mechanisms in the vicinity of a cratonic edge. Systematic spatial variations of anisotropic characteristics are revealed by 3027 pairs of splitting parameters measured at 547 broadband seismic stations. The western and southern edges of the North American craton show edge-parallel fast directions with larger-than-normal splitting times, and the continental interior is characterized by smaller splitting times spatially consistent fast directions that are mostly parallel to the absolute plate motion direction of North America. Except for a small area in the vicinity of the Llano Uplift in central Texas, no systematic azimuthal variations of the splitting parameters are observed, suggesting that a single layer of anisotropy with horizontal axis of symmetry can adequately explain the observations. Estimation of the depth of the source of the observed anisotropy using spatial coherency of the splitting parameters indicates that the observed anisotropy mostly originate from the upper asthenosphere, through simple shear between the partially coupled lithosphere and asthenosphere.

ISBN: 9781267970787Subjects--Topical Terms:

516570
Geology.

Mantle flow and lithosphere-asthenosphere coupling beneath the southwestern edge of the North American craton: Constraints from shear-wave splitting measurements.
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020 $a 9781267970787
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100 1 $a Refayee, Hesham Ahmad. $3 2098671
245 1 0 $a Mantle flow and lithosphere-asthenosphere coupling beneath the southwestern edge of the North American craton: Constraints from shear-wave splitting measurements.
300 $a 91 p.
500 $a Source: Dissertation Abstracts International, Volume: 74-07(E), Section: B.
500 $a Advisers: Kelly Liu; Stephen Gao.
502 $a Thesis (Ph.D.)--Missouri University of Science and Technology, 2012.
520 $a High-quality broadband seismic data recorded by the USArray and other stations in the southwestern United States provide a unique opportunity to test different models of anisotropy-forming mechanisms in the vicinity of a cratonic edge. Systematic spatial variations of anisotropic characteristics are revealed by 3027 pairs of splitting parameters measured at 547 broadband seismic stations. The western and southern edges of the North American craton show edge-parallel fast directions with larger-than-normal splitting times, and the continental interior is characterized by smaller splitting times spatially consistent fast directions that are mostly parallel to the absolute plate motion direction of North America. Except for a small area in the vicinity of the Llano Uplift in central Texas, no systematic azimuthal variations of the splitting parameters are observed, suggesting that a single layer of anisotropy with horizontal axis of symmetry can adequately explain the observations. Estimation of the depth of the source of the observed anisotropy using spatial coherency of the splitting parameters indicates that the observed anisotropy mostly originate from the upper asthenosphere, through simple shear between the partially coupled lithosphere and asthenosphere.
590 $a School code: 0587.
650 4 $a Geology. $3 516570
650 4 $a Geophysics. $3 535228
690 $a 0372
690 $a 0373
710 2 $a Missouri University of Science and Technology. $b Geology and Geophysics. $3 2098672
773 0 $t Dissertation Abstracts International $g 74-07B(E).
790 $a 0587
791 $a Ph.D.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3537402