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TitleGold along Cordilleran faults: Key characteristics and analogies between Phanerozoic and Archean settings
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorCastonguay, SORCID logo; Ootes, L; Mercier-Langevin, P; Devine, F
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; by Rogers, N (ed.); Geological Survey of Canada, Open File 8358, 2018 p. 139-145, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative: 2017 report of activities, volume 1
File formatpdf
ProvinceBritish Columbia; Yukon
NTS104M/08; 104M/09; 104M/10; 104M/15; 104N/12; 105D/03; 105D/04; 105D/05; 105D/06
AreaTagish Lake; Tally-Ho Mountain; Gold Hill; Mount Hodnett
Lat/Long WENS-135.2500 -133.7500 60.5000 59.2500
Subjectseconomic geology; structural geology; tectonics; mineral deposits; mineral potential; mineral exploration; ore mineral genesis; ore controls; structural controls; gold; vein deposits; epithermal deposits; polymetallic ores; mesothermal deposits; skarn deposits; tectonic evolution; tectonic setting; faulting; magmatism; intrusions; mineralization; bedrock geology; lithology; igneous rocks; intrusive rocks; volcanic rocks; metamorphic rocks; structural features; faults; shear zones; modelling; Archean; Canadian Cordillera; Llewellyn Fault; Tally Ho Shear Zone; Engineer Mine; Mount Skukum Mine; Bennett Plateau; Intermontane Belt; Coast Belt; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; photographs
ProgramTargeted Geoscience Initiative (TGI-5) Knowledge Management Coordination
ProgramTargeted Geoscience Initiative (TGI-5) Gold systems
Released2018 01 19
AbstractSeveral gold deposits and prospects in the Canadian Cordillera of British Columbia and Yukon are associated, at least spatially, to major fault zones. The Llewellyn fault and Tally Ho shear zone region of northwestern British Columbia and southern Yukon is the locus of a series of vein-hosted gold prospects and deposits, including the past-producing Engineer and Mount Skukum mines. Many of these gold occurrences have epithermal polymetallic signatures, although some are considered mesothermal-orogenic, as such related to first-order crustal breaks and synchronous magmatism. However, the temporal and genetic relationships between the orogenic- and epithermal-style systems along the Llewellyn fault and Tally Ho shear zone remain to be clearly established. Reconnaissance work has underlined a three-part relationship between these large-scale structures, gold mineralization and Eocene magmatic complexes. Characterization of Llewellyn fault zone in the Bennett Plateau and Tagish Lake area of British Columbia, and of the Tally Ho shear zone in the Tally Ho Mountain, Gold Hill and Mount Hodnett areas of Yukon, and of their spatially associated gold mineralization, aims to test this model and ultimately draw comparisons with the much older, structurally controlled gold deposits of the Archean and Paleoproterozoic.
Summary(Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is directed towards providing next generation knowledge and methods to facilitate more effective targeting of buried mineral deposits. The program aims to enhance the effectiveness of exploration for Canada¿s major mineral systems by resolving foundational geoscience problems that constrain the geological processes responsible for the liberation metals from their source region, transportation of these ore metals and control their eventual deposition. TGI supports projects on gold, Ni-Cr-PGE, porphyry-style mineralization, uranium and volcanic- and sedimentary-hosted base metal mineralization ore systems, with each project divided into subprojects focused on resolving specific knowledge gaps by integrating data and studies from multiple sites across Canada. Herein, we present interim results and interpretations from a selection of the research activities currently being conducted under the auspices of TGI.

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