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TitleNeoproterozoic-hosted Carlin-type mineralization in central Yukon, part 2: mineralization
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LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPinet, N; Sack, P; Mercier-Langevin, P; Davis, W JORCID logo; Lavoie, DORCID logo; Ardakani, O HORCID logo; Komaromi, B A; Dubé, B; Cline, J S; Petts, D CORCID logo; Jautzy, JORCID logo; Jackson, S EORCID logo; Percival, J BORCID logo; Savard, M MORCID logo; Brake, V I
SourceTargeted Geoscience Initiative 5: contributions to the understanding of Canadian gold systems; by Mercier-Langevin, P (ed.); Lawley, C J MORCID logo (ed.); Castonguay, SORCID logo (ed.); Geological Survey of Canada, Open File 8712, 2020 p. 299-314, https://doi.org/10.4095/326047 Open Access logo Open Access
Year2020
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative 5: contributions to the understanding of Canadian gold systems
RelatedThis publication is related to the following publications
File formatpdf
ProvinceYukon
NTS106C/01; 106C/02
Lat/Long WENS-133.0000 -132.0000 64.2500 64.0000
Subjectseconomic geology; structural geology; tectonics; geochemistry; sedimentology; structural geology; Science and Technology; Nature and Environment; mineral deposits; gold; sedimentary ore deposits; replacement deposits; ore mineral genesis; mineralization; ore controls; structural controls; models; mineral exploration; exploration guidelines; alteration; silicification; quartz; dolomitization; indicator elements; pyrite; base metal geochemistry; silver geochemistry; fluid dynamics; veins; laminations; brecciation; drillholes; core samples; tectonic setting; hydrothermal systems; fluid flow; intrusions; dykes, mafic; decollement; bedrock geology; lithology; sedimentary rocks; limestones; siltstones; landslide deposits; debris flow deposits; dolostones; mudstones; shales; conglomerates; breccias; structural features; faults; folds; anticlines; fractures; bedding planes; whole rock geochemistry; porosity; permeability; host rocks; Canadian Cordillera; Neoproterozoic; Nadaleen Trend; Ogilvie Platform; Selwyn Basin; Dawson Fault; Kathleen Lakes Fault; Nadaleen Fault; Osiris Fault; Rackla Group; Nadaleen Formation; Gametrail Formation; Blueflower Formation; Conrad Prospect; Sunrise Prospect; Anubis Prospect; Rackla Belt; Hay Creek Group; Old Cabin Formation; Algae Formation; Ice Brook Formation; Phanerozoic; Mesozoic; Cretaceous; Paleozoic; Carboniferous; Devonian; Ordovician; Precambrian; Proterozoic
Illustrationsgeoscientific sketch maps; cross-sections; photographs; lithologic sections; profiles; sketches; 3-D diagrams; photomicrographs; geochemical plots
ProgramTargeted Geoscience Initiative (TGI-5) Gold ore systems
Released2020 06 11
AbstractGold-rich zones in the Nadaleen trend (central Yukon) exhibit several characteristics consistent with Carlin-type mineralization: 1) alteration zones with partial to complete decalcification of mineralized intervals and very fine-grained quartz associated with silicification; 2) the association of gold with certain pathfinder elements (Tl, As, Hg, and Sb) and minerals (realgar, orpiment, and fluorite); 3) the low base metal and Ag content of the mineralized intervals; and 4) the 'invisible' nature of gold, which occurs as rims of Au-bearing arsenian pyrite on pre-ore pyrite and/or as sub-micrometre particles. Mineralization styles vary significantly between intervals and even within an interval, attesting to the 'passive' or 'opportunistic' nature of the mineralizing fluids that exploited a variety of porous and permeable pathways regardless of their sedimentary and/or tectonic origin. Alternating finely laminated limestone and siltstone (Conrad zone) and floatstone intervals (Conrad, Sunrise, and Osiris zones) are the most favourable sedimentary units. Pre-mineralization fractures acted as feeders for selective bed replacement and pre-mineralization vein networks were preferentially dissolved by early acidic fluids and channelized later by gold-bearing fluids. With ongoing research, we hope to better constrain the occurrence of gold at the micron scale, the geochemical variations due to alteration, the temperature of the mineralizing fluids, and the timing of the gold mineralization.
Summary(Plain Language Summary, not published)
The main objective of phase 5 (2015-2020) of Natural Resources Canada and Geological Survey of Canada's Targeted Geoscientific Initiative (TGI) program was to generate new knowledge, methodologies and models to enhance the exploration industry's ability to detect buried ore deposits. This synthesis volume contains 20 individual papers that discuss craton to deposit-scale characteristics of auriferous deposits, plus some support material pertaining to the TGI-5 Gold project.
GEOSCAN ID326047

 
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