Doctoral Dissertations

Bingzhu Wang

Abstract

"While receiver function (RF) calculation is fundamentally important and widely used, it is not well solved due to unstable deconvolution. A spline-based RF calculation method was proposed and it is demonstrated that both individual RFs and the stacked RF calculated with the spline method have sharper peaks than those with the water-level spectral division method and the iterative deconvolution method. At the common peaks on the stacked RFs, there are close similarities for all three RF calculation methods. The better calculated RFs with the spline method lead to improved H - K analysis and improved determination of the optimal Moho depth and VP/VS with greater resolution.

Through bootstrapped H - K analysis of the stacked Sv-P RFs calculated with the spline method, the optimal Moho depth (79.1 ± 0.2 km) and VP/VS (1.781 ± 0.002) were obtained beneath the LSA station on the Tibetan Plateau. The thick crust and elevated VP/VS resulted from the India-Eurasia continental collision and underplating. The optimal Moho depth (43.7 km) and VP/VS (1.7825) were also obtained beneath the TLY station in the Baikal rift zone. For both LSA and TLY, the Moho depths and VP/VS ratios obtained using all three RF calculation methods are compatible.

Spline-based high-accuracy practical techniques were also proposed to perform 3D and 2D integral transformations (from potential field components to potential and from potential-field gradient components to potential field components) that are substantially more accurate than the Fourier transform techniques. Harmonicity is confirmed substantially better for the spline method than the Fourier transform method, and the spline-based integration and differentiation are invertible"--Abstract, page iii.

Advisor(s)

Gao, Stephen S.
Liu, Kelly H.

Committee Member(s)

Oboh-Ikuenobe, Francisca
Rogers, J. David
Mickus, Kevin

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Geology and Geophysics

Sponsor(s)

National Science Foundation (U.S.)
Natural Sciences and Engineering Research Council of Canada

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2011

Journal article titles appearing in thesis/dissertation

  • A new spline-based method for high-resolution receiver function calculations from teleseismic broadband waveforms
  • A new spline-based method for high-accuracy practical potential-field integral transformations

Pagination

xiii, 140 pages

Note about bibliography

Includes bibliographical references (pages 130-139).

Rights

© 2011 Bingzhu Wang, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Gravity anomaliesHarmonic drivesIntegral transformsSeismic waves -- Mathematical modelsSeismology -- Mathematics

Thesis Number

T 9906

Print OCLC #

801812235

Electronic OCLC #

909396079

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