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Using field investigation, structural analysis, and 40 Ar– 39 Ar and fission-track geochronology, we synthesize the structural architecture, stress fields, and tectonic evolution of the Dabashan orocline, southwestern Qinling. Three paleostress fields govern deformation: The first (Late Triassic to Early Jurassic, T 3 –J 1 ) reflects ∼N–S to NNE–SSW shortening in the...
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