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Title: Joint inversion of seismic and gravity data for imaging seismic velocity structure of the crust and upper mantle beneath Utah, United States

Here, we present a method for using any combination of body wave arrival time measurements, surface wave dispersion observations, and gravity data to simultaneously invert for three-dimensional P- and S-wave velocity models. The simultaneous use of disparate data types takes advantage of the differing sensitivities of each data type, resulting in a comprehensive and higher resolution three-dimensional geophysical model. In a case study for Utah, we combine body waves first arrivals mainly from the USArray Transportable Array, Rayleigh wave group and phase velocity dispersion data, and Bouguer gravity anomalies to invert for crustal and upper mantle structure of the region. Results show clear delineations, visible in both P- and S-wave velocities, between the three main tectonic provinces in the region. In conclusion, without the inclusion of the surface wave and gravity constraints, these delineations are less clear, particularly for S-wave velocities. Indeed, checkerboard tests confirm that the inclusion of the additional datasets dramatically improves S-wave velocity recovery, with more subtle improvements to P-wave velocity recovery, demonstrating the strength of the method in successfully recovering seismic velocity structure from multiple types of constraints.
Authors:
ORCiD logo [1] ;  [2] ; ORCiD logo [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Science and Technology of China, Hefei (China). School of Earth and Space Sciences, Lab. of Seismology and Physics of Earth's Interior
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Report Number(s):
LA-UR-16-28451
Journal ID: ISSN 0040-1951
Grant/Contract Number:
AC52-06NA25396; AC05-00OR22725; 41474039
Type:
Accepted Manuscript
Journal Name:
Tectonophysics
Additional Journal Information:
Journal Volume: 718; Journal ID: ISSN 0040-1951
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Seismic tomography; Crustal structure; Western United States; Body waves, surface waves; Gravity anomalies
OSTI Identifier:
1371669
Alternate Identifier(s):
OSTI ID: 1394249

Syracuse, Ellen Marie, Zhang, Haijiang, and Maceira, Monica. Joint inversion of seismic and gravity data for imaging seismic velocity structure of the crust and upper mantle beneath Utah, United States. United States: N. p., Web. doi:10.1016/j.tecto.2017.07.005.
Syracuse, Ellen Marie, Zhang, Haijiang, & Maceira, Monica. Joint inversion of seismic and gravity data for imaging seismic velocity structure of the crust and upper mantle beneath Utah, United States. United States. doi:10.1016/j.tecto.2017.07.005.
Syracuse, Ellen Marie, Zhang, Haijiang, and Maceira, Monica. 2017. "Joint inversion of seismic and gravity data for imaging seismic velocity structure of the crust and upper mantle beneath Utah, United States". United States. doi:10.1016/j.tecto.2017.07.005. https://www.osti.gov/servlets/purl/1371669.
@article{osti_1371669,
title = {Joint inversion of seismic and gravity data for imaging seismic velocity structure of the crust and upper mantle beneath Utah, United States},
author = {Syracuse, Ellen Marie and Zhang, Haijiang and Maceira, Monica},
abstractNote = {Here, we present a method for using any combination of body wave arrival time measurements, surface wave dispersion observations, and gravity data to simultaneously invert for three-dimensional P- and S-wave velocity models. The simultaneous use of disparate data types takes advantage of the differing sensitivities of each data type, resulting in a comprehensive and higher resolution three-dimensional geophysical model. In a case study for Utah, we combine body waves first arrivals mainly from the USArray Transportable Array, Rayleigh wave group and phase velocity dispersion data, and Bouguer gravity anomalies to invert for crustal and upper mantle structure of the region. Results show clear delineations, visible in both P- and S-wave velocities, between the three main tectonic provinces in the region. In conclusion, without the inclusion of the surface wave and gravity constraints, these delineations are less clear, particularly for S-wave velocities. Indeed, checkerboard tests confirm that the inclusion of the additional datasets dramatically improves S-wave velocity recovery, with more subtle improvements to P-wave velocity recovery, demonstrating the strength of the method in successfully recovering seismic velocity structure from multiple types of constraints.},
doi = {10.1016/j.tecto.2017.07.005},
journal = {Tectonophysics},
number = ,
volume = 718,
place = {United States},
year = {2017},
month = {7}
}