Passchier, Cornelis Willem: Intrusion mechanisms in a turbidite sequence : the Voetspoor and Doros plutons in NW Namibia
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Personen: Passchier, Cornelis Willem (Autor) 
Trouw, Rudolph A.J. (Autor) 
Goscombe, Ben (Autor) 
Gray, David (Autor) 
Kröner, Alfred (Autor) 
  
Titel: Intrusion mechanisms in a turbidite sequence : the Voetspoor and Doros plutons in NW Namibia
  
Quelle: Journal of structural geology. Bd. 29. H. 3. S. 481 - 496
Erscheinungsjahr:    2007
ISBN / ISSN: 0191-8141
URL der Originalveröffentlichung doi:10.1016/j.jsg.2006.09.007
  
Dokumentart:
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Personen der Universität:    Passchier, Cornelis Willem  In UnivIS suchen  ; Kröner, Alfred  In UnivIS suchen 
Einrichtung: Institut für Geowissenschaften
DDC-Sachgruppe:    Geowissenschaften
DFG-Fachgebiet: Geologie und Paläontologie
ID: 16335  Universitätsbibliothek Mainz
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Informationen zu den Nutzungsrechten unserer Inhalte Informationen zu den Nutzungsrechten unserer Inhalte
Abstract: Two syntectonic plutons of Cambrian age intruded Neoproterozoic metaturbidites in Namibia at the junction of the NS trending Kaoko and EW trending Damara belts. Sinistral transpression in the Kaoko Belt produced km-scale upright D1 folds overprinted by minor D2 folds. D3 is associated with N-S shortening in the Damara Belt. The plutons show two main pulses of intrusion: hornblende syenite intruded late during D1 or during D2 and biotite granite during D3. Each tectonic event produced a strain shadow defined by the shape of folds and the foliation trend around the plutons. The internal igneous fabric and the arrangement of wall rock xenoliths that locally make up 50% of the intrusion mass suggest that the plutons have a disk or wedge shape. A marginal shear zone indicates that one of the syenite intrusions descended during emplacement with respect to the wall rock. Emplacement is therefore inferred to be at least partly accommodated by descent of the intrusion floor. The biotite granite intruded into mega-strain shadows and tension gashes alongside and in the syenite during D3. The plutons show evidence of sinistral solid state rotation with respect to the wall rocks in response to D1-D2 transpression.
   
  
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