Abstract

The possible application of kink bands in dynamic structural analysis is shown by a recent study along a short segment of the Denali fault, Alaska. In laboratory experiments, kink-band planes form at measured angles of 45° to 60° with the maximum principal stress (σ1) in properly oriented foliated rocks; this relation can be applied in the study of fault-stress histories. Two stress patterns are postulated during the history of the Denali fault; one is compatible with reverse or thrust faulting and is based primarily on the geometry of intrafolial folds, slip cleavage, and crinkles. A second (and presumably younger) stress pattern is compatible with strike-slip movement and is based solely on kink-band geometry.

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