Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3324319c&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 24, CiteID L24319
Physics
19
Geodesy And Gravity: Tectonic Deformation (6924), Tectonophysics: Continental Tectonics: General (0905), Tectonophysics: Plate Motions: Present And Recent (3040)
Scientific paper
After decades of research on continental tectonics, there is still no consensus on the mode of deformation of continents or on the forces that drive their deformation. In Asia the debate opposes edge-driven block models, requiring a strong lithosphere with strain localized on faults, to buoyancy-driven continuous models, requiring a viscous lithosphere with pervasive strain. Discriminating between these models requires continent-wide estimates of lithospheric strain rates. Previous efforts have relied on the resampling of heterogeneous geodetic and Quaternary faulting data sets using interpolation techniques. We present a new velocity field based on the rigorous combination of geodetic solutions with relatively homogeneous station spacing, avoiding technique-dependent biases inherent to interpolation methods. We find (1) unresolvable strain rates (<3 × 109/yr) over a large part of Asia, with current motions well-described by block or microplate rotations, and (2) internal strain, possibly continuous, limited to high-elevation areas.
Calais Eric
Dong Lai
Shen Zuowei
Vergnolle Mathilde
Wang Min
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