Age, geochemistry, and fluid characteristics of the MAX porphyry Mo deposit, southeast British Columbia

• Author / Creator

  Lawley, Christopher John Michael

• MAX is a porphyry Mo deposit located near Trout Lake village in southeastern British Columbia. Mo mineralization is hosted by variably-altered calc-alkaline granodiorite dikes. Quartz veins have been subdivided into a paragenetic sequence based on vein style and crosscutting relationships. Post-magmatic Pb-Zn-Ag-bearing veins crosscut Mo-bearing veins. Similarities in fluid chemistry from both vein types suggest a genetic link between porphyry Mo mineralization and base-metal veins.

  Three molybdenite samples were collected from early and late Mo-bearing veins for Re-Os dating to constrain the timing of Mo-mineralizing events within the paragenetic sequence. All three dates overlap within analytical error, and yield a weighted average age of 80.3 ± 0.2 Ma. These dates are in excellent agreement with two 206Pb/238U weighted-average ages of the Trout Lake stock at 80.2 ± 1.0 Ma and 80.9 ± 1.6 Ma, indicating that the magmatic and hydrothermal ore-forming events were coeval and cogenetic.

• Subjects / Keywords

  • Trout Lake
  • Porphyry
  • Lardeau
  • Re-Os
  • U-Pb
  • Kootenay
  • Stockwork
  • Fluid Inclusion
  • Southeast British Columbia
  • Pb-Zn-Ag
  • MAX
  • Geochemistry
  • Molybdenum
  • Geochronology
  • Granodiorite

• Graduation date

  Fall 2009

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3D59Q

• 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.