期刊
GEOPHYSICAL RESEARCH LETTERS
卷 37, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2010GL043220
关键词
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资金
- NSF-EAR [0409443, 0838538]
- Division Of Earth Sciences
- Directorate For Geosciences [0409443, 0838538] Funding Source: National Science Foundation
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 decollement. 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. Citation: 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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