The paragenesis and geochemistry of the Bellekeno Ag-Pb-Zn vein, Keno Hill district, Yukon, Canada

  • Author / Creator
    Hantelmann, Jos J.
  • The Keno Hill district Ag-Pb-Zn deposit occurs within the Tombstone-Tungsten Belt, Yukon. Vein mineralization, dominated by siderite, sphalerite, and galena, is spatially associated with, but paragenetically later than, intrusion-related gold mineralization. A direct genetic link between the Keno Hill mineralization and the Roop Lakes stock cannot be demonstrated; however the age of Keno Hill mineralization and spatial geochemical variations of mineral chemistry suggests that some genetic or temporal relationship exists.
    Twelve distinct mineral assemblages record 5 different fluid compositions defining a cooling trend from >300˚C to <160˚C (Th). Fluids evolved and variably mixed; decreasing temperature and dilution appear to be the principal controls on silver and base-metal mineralization. Moderately saline fluids (<20 wt % NaCl equiv.) could be derived from either magmatic or formation waters, with some of the dissolved components derived from the surrounding country rock. A late stage, lower temperature fluid is of meteoric origin.

  • Subjects / Keywords
  • Graduation date
    Fall 2013
  • 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.