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Crustal‐scale pure shear foreland deformation of western Argentina Public Deposited

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  • New analyses of teleseismic body waves from moderate earthquakes in western Argentina demonstrate that active shortening of the Andean foreland occurs on reverse faults extending to 40–50 km depth. Existing crustal‐scale models of foreland deformation invoke thin‐skinned fault geometries, which root into an east‐dipping mid‐crustal décollement. Whereas thin‐skinned thrust sheets dominate shallow‐crustal structure, seismological and geological data illustrate that planar reverse faults and pure‐shear deformation involving more than 75% of the crust characterizes this thick‐skinned structural province.
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  • Meigs, A. J., and J. Nabelek (2010), Crustal‐scale pure shear foreland deformation of western Argentina, Geophys. Res. Lett., 37, L11304, doi:10.1029/2010GL043220.
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  • We acknowledge support from NSF‐EAR grants 0409443 and 0838538.
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  • description.provenance : Made available in DSpace on 2011-09-23T21:47:35Z (GMT). No. of bitstreams: 1 NabelekJohn.COAS.Crustal-scalePureShear.pdf: 502222 bytes, checksum: 1e8582c029fbc8b1bc754c71a561c175 (MD5) Previous issue date: 2010-06-11
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2011-09-21T22:00:53Z No. of bitstreams: 1 NabelekJohn.COAS.Crustal-scalePureShear.pdf: 502222 bytes, checksum: 1e8582c029fbc8b1bc754c71a561c175 (MD5)
  • Geophysical Research Letters
  • Vol. 37 (2010)
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2011-09-23T21:47:35Z (GMT) No. of bitstreams: 1 NabelekJohn.COAS.Crustal-scalePureShear.pdf: 502222 bytes, checksum: 1e8582c029fbc8b1bc754c71a561c175 (MD5)

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