Journal article
Kinematic stratification in the hinterland of the central Scandinavian Caledonides
Journal of structural geology, Vol.15(3), pp.629-646
1993
DOI: 10.1016/0191-8141(93)90152-Z
Abstract
A transect through west-central Norway illustrates the changing geometry and kinematics of collision in the hinterland of the central Scandinavian Caledonides. A depth section through the crust is exposed on Fosen Peninsula, comprising three tectonic units separated by two shear zones. The lowest unit, exposed in the Roan window, is a modestly deformed, Caledonian granulite complex framed by a subhorizontal décollement, with NW-SE oriented lineations and kinematic indicators showing top-to-the-northwest transport. The middle unit, the Vestranden gneiss complex, contains relict granulites, but was penetratively deformed at amphibolite facies to produce an orogen-parallel family of structures during translation on the décollement. Shallow plunging lineations on steep schistosities are subparallel to fold axes of the dominant, upright, non-cylindrical folds. A small component of sinistral strike slip is also recorded. In contrast, southernmost Fosen Peninsula contains an abundance of cover rocks infolded with Proterozoic basement in a fold nappe, with shallow, E-dipping schistosities, down-dip lineations, and orogen-oblique, top-to-the-west shear sense indicators. A NE-striking, sinistral shear zone separates the gneisses from southern Fosen. Deformation in the Scandian hinterland was partitioned both in space and time, with orogen-parallel extension and shear at middle structural levels and orogen-oblique transport at shallower levels.
Details
- Title: Subtitle
- Kinematic stratification in the hinterland of the central Scandinavian Caledonides
- Creators
- Jane A Gilotti - New York State MuseumJoseph M Hull - University at Albany, State University of New York
- Resource Type
- Journal article
- Publication Details
- Journal of structural geology, Vol.15(3), pp.629-646
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/0191-8141(93)90152-Z
- ISSN
- 0191-8141
- eISSN
- 1873-1201
- Language
- English
- Date published
- 1993
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984229297202771
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