Passchier, Cornelis Willem: Laterally constricted shear zone system : the Nordre Stromfjord steep belt, Nagssugtoqidian Orogen, W Greenland
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Personen: Passchier, Cornelis Willem (Autor) 
Den Brok, Swj. (Autor) 
Van Gool, Jam. (Autor) 
Marker, M. (Autor) 
Manatschal, G. (Autor) 
Titel: Laterally constricted shear zone system : the Nordre Stromfjord steep belt, Nagssugtoqidian Orogen, W Greenland
Quelle: Terra nova. Bd. 9. H. 5/6. Oxford : Blackwell Scientific Publ. S. 199 - 202
Erscheinungsjahr:    1997
ISBN / ISSN: 0954-4879
URL der Originalveröffentlichung doi:10.1111/j.1365-3121.1997.tb00012.x
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:    Passchier, Cornelis Willem  In UnivIS suchen  
Einrichtung: Institut für Geowissenschaften
DDC-Sachgruppe:    Geowissenschaften
ID: 52633  Universitätsbibliothek Mainz
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Abstract: Many ductile shear zones are interpreted to operate by simple shear flaw but some form under other flow regimes. Lineations and foliations in such shear zones can lie obliquely to those in simple shear zones, which can lead to erroneous tectonic interpretations on the assumption of simple shear flow. This paper describes a gently dipping shear zone system from the N-central segment of the Palaeoproterozoic Nagssugtoqidian orogen of W. Greenland, which operated with a lateral constriction component. This resulted in the development of upright folds with axes parallel to the transport direction where the constriction component is weak. Where it is strong, a linear fabric and even a subvertical foliation normal to the rotation axis of bulk flow developed. This steep foliation is interpreted as the origin of the Nordre Stromfjord steep belt, previously interpreted as a crustal-scale sinistral transcurrent shear zone. Shear zones of this type may occur elsewhere and shear zone fabrics should therefore be carefully analysed before the direction of tectonic transpost can be determined.
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