| Title | Neoproterozoic-hosted Carlin-type mineralization in central Yukon, part 2: mineralization |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Pinet, N; Sack, P; Mercier-Langevin, P; Davis, W J ; Lavoie, D; Ardakani, O H; Komaromi, B A; Dubé, B; Cline, J S; Petts, D C; Jautzy, J; Jackson, S E; Percival, J B; Savard, M M; Brake, V I |
| Source | Targeted Geoscience Initiative 5: contributions to the understanding of Canadian gold systems; by Mercier-Langevin, P (ed.); Lawley, C J M (ed.); Castonguay, S (ed.); Geological Survey of Canada, Open File 8712, 2020 p. 299-314, https://doi.org/10.4095/326047  Open Access |
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| Year | 2020 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative 5: contributions to the understanding of Canadian gold systems |
| Related | This publication is related to the
following publications |
| File format | pdf |
| Province | Yukon |
| NTS | 106C/01; 106C/02 |
| Lat/Long WENS | -133.0000 -132.0000 64.2500 64.0000 |
| Subjects | economic 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 |
| Illustrations | geoscientific sketch maps; cross-sections; photographs; lithologic sections; profiles; sketches; 3-D diagrams; photomicrographs; geochemical plots |
| Program | Targeted Geoscience Initiative (TGI-5) Gold ore systems |
| Released | 2020 06 11; 2023 03 17 |
| Abstract | Gold-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 ID | 326047 |
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