Cambrian-Ordovician successions and detrital zircon geochronology of North Wales and Nova Scotia

  • Author / Creator
    Pothier, Hayley Dawn
  • The Appalachian-Caledonide Orogen resulted in the collision of Laurentia, Baltica and many peri-Gondwanan terranes, of which two share similar histories. The Harlech Dome and St. Tudwal’s Peninsula, in North Wales, and the Meguma Terrane of southern Nova Scotia, in Atlantic Canada, preserve similar sedimentary successions of Cambrian age. U-Pb detrital zircon data from these regions show a West African source in the Cambrian. In the Harlech Dome this is replaced by a probable Ganderian source by the Tremadocian. Correlative rocks of the Lumsden Dam Formation of the Meguma terrane lack this Ganderian signature. This suggests North Wales was juxtaposed with the Monian Composite Terrane by this time along the Menai Strait Fault System, which has a history of sinistral strike-slip movement. This strike-slip tectonic regime could also account for the removal of the Meguma Terrane from an original position adjacent to the Harlech Dome and the basins’ divergent Ordovician histories.

  • Subjects / Keywords
  • Graduation date
    Spring 2014
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.