Kinematic stratification in the hinterland of the central Scandinavian Caledonides
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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.
Suggested Citation
Gilotti, J.A., and Hull, J., 1993, Kinematic stratification in the hinterland of the central Scandinavian Caledonides: Journal of Structural Geology, v. 15, no. 3-5, p. 629-646, https://doi.org/10.1016/0191-8141(93)90152-Z.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Kinematic stratification in the hinterland of the central Scandinavian Caledonides |
| Series title | Journal of Structural Geology |
| DOI | 10.1016/0191-8141(93)90152-Z |
| Volume | 15 |
| Issue | 3-5 |
| Year Published | 1993 |
| Language | English |
| Publisher | Elsevier |
| Description | 18 p. |
| First page | 629 |
| Last page | 646 |