Giant quartz vein zones of the Great Bear magmatic zone, Northwest Territories, Canada

  • Author / Creator
    Byron, Suzanne
  • The Great Bear magmatic zone, Northwest Territories, hosts numerous giant quartz veins and stockwork zones. These zones can be up to 100m wide and up to 10km long, with two or more generations of quartz. A few of the giant quartz vein zones host base-metal ± uranium mineralization, and some are proximal to mineralization, although most are barren. Cathodoluminescence imaging shows the quartz veins have complex growth zones and a trace element study suggests that these zones are the result of Al and Li substitution in the quartz lattice. Oxygen isotope (δ18Oqtz) values of quartz generally fall between +8 to +14.6‰ (VSMOW). Fluid inclusion homogenization temperatures range from 100 to 375˚C, and the fluids have variable salinities. The fluids that created the giant quartz veins are epithermal in nature with a meteoric water ± brine signature, and formed as a result of multiple fluid pulses and re-fracturing events.

  • Subjects / Keywords
  • Graduation date
    Fall 2010
  • 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.