How can K-Ar geochronology of clay-size mica/illite help constrain reactivation histories of brittle faults? An example from a Paleozoic thrust fault in Northern Norway
E Torgersen, G Viola… - EGU General Assembly …, 2013 - ui.adsabs.harvard.edu
By combining K-Ar age dating of clay-size mica/illite with the detailed structural and
kinematic analysis of a complex brittle fault, we show that it is possible to recognize and date
several generations of authigenic, synkinematic mica/illite grown during brittle deformation,
and relate them to distinct episodes of fault movement. This multi-disciplinary approach
provides a valuable tool for assessing potential reactivations of brittle faults that would
otherwise remain very difficult to unfold. The study area is within the Repparfjord Tectonic …
kinematic analysis of a complex brittle fault, we show that it is possible to recognize and date
several generations of authigenic, synkinematic mica/illite grown during brittle deformation,
and relate them to distinct episodes of fault movement. This multi-disciplinary approach
provides a valuable tool for assessing potential reactivations of brittle faults that would
otherwise remain very difficult to unfold. The study area is within the Repparfjord Tectonic …
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