A precautionary note on shear bands as kinematic indicators.

Behrmann, Jan H. (1987) A precautionary note on shear bands as kinematic indicators. Open Access Journal of Structural Geology, 9 (5-6). pp. 659-666. DOI 10.1016/0191-8141(87)90150-7.

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Abstract

The orientation of shear bands relative to foliations defined by elongated mineral aggregates, is often used to determine the large-scale sense of displacement in ductile faults. Data from contact strain zones at the bases of large overthrust complexes in the Eastern Alps and the Betic Cordilleras demonstrate that there is not always a simple geometrical relation between shear band orientation and sense of vorticity in bulk non-coaxial flow. In addition to single shear band sets that show displacements synthetic with the large-scale displacement, there are single sets with antithetic displacements, and conjugate sets. The last two observations are at variance with published data and interpretations, and cast doubts on the general applicability of shear bands as indicators of large scale flow kinematics.

Document Type: Article
Keywords: Shear band, kinematic indicator, displacement, Eastern Alps, Betic Cordilleras,
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/0191-8141(87)90150-7
ISSN: 0191-8141
Date Deposited: 07 Feb 2013 11:35
Last Modified: 17 Jan 2018 09:53
URI: http://oceanrep.geomar.de/id/eprint/19473

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