| Title | Macroscopic control on Carlin-type gold mineralization in north-central Yukon |
| Download | Download (whole publication) |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Pinet, N; Sack, P J |
| Source | Targeted Geoscience Initiative: 2018 report of activities; by Rogers, N (ed.); Geological Survey of Canada, Open File 8549, 2019 p. 89-103, https://doi.org/10.4095/313644  Open Access |
| Year | 2019 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative: 2018 report of activities |
| Related | This publication is related to Whole-rock geochemistry of
samples from Carlin-type gold zones, Nadaleen trend, Yukon |
| File format | pdf |
| Province | Yukon |
| NTS | 106C/01; 106C/02 |
| Area | Nadaleen River |
| Lat/Long WENS | -133.0000 -132.0000 64.1667 64.0500 |
| Subjects | economic geology; sedimentology; structural geology; mineral deposits; gold; replacement deposits; sedimentary ore deposits; mineral exploration; mineral potential; ore mineral genesis; mineralization;
ore controls; drillholes; geophysical logging; bedrock geology; lithology; sedimentary rocks; limestones; mudstones; conglomerates; grainstones; landslide deposits; debris flow deposits; breccias; porosity; permeability; bedding planes; fluid flow;
transport mechanisms; sedimentary structures; structural features; fractures; faults; faults, thrust; folds; anticlines; synclines; intrusions; dykes; Rackla Belt; Sunrise Prospect; Osiris Prospect; Osiris Limestone; Gametrail Formation; Osiris
Mudstone; Nadaleen Formation; Neoproterozoic; Nadaleen Fault; Osiris Fault; Osiris Anticline; Precambrian; Proterozoic |
| Illustrations | location maps; geoscientific sketch maps; photographs; cross-sections; geophysical logs; profiles; charts; plots; schematic representations; lithologic sections |
| Program | Targeted Geoscience Initiative (TGI-5) Knowledge Management Coordination |
| Program | Targeted Geoscience Initiative (TGI-5) Gold ore systems - tectonic drivers and conduits |
| Released | 2019 03 01 |
| Abstract | This open file summarizes observations from diamond drillhole logging on a section through the Sunrise prospect, in north-central Yukon, and to a lesser extent the Osiris prospect. Carlin-type
mineralization is hosted in a lime-mudstone unit (Osiris limestone, Neoproterozoic Gametrail Formation) bounded on both sides by a non-calcareous mudstone unit (Osiris Mudstone, Nadaleen Formation), which is interpreted to have low porosity and
permeability. This geometry provides first-order control on mineralized zones that are grossly concordant with bedding. Discontinuous rudstone and floatstone intervals in the Gametrail Formation also played an important role in focussing mineralizing
fluids and influenced the location, geometry, and characteristics of orebodies. Clast-supported rudstone intervals (flat pebble conglomerate) deposited through short-transport gliding acted as impermeable barriers, whereas matrix supported floatstone
and coarse grainstone intervals, deposited through debris flows, preferentially channelled fluids. Variation of the pre-mineralization fracture permeability, due to bed thickness and lithology or specific tectonic features (e.g. cataclastic zone,
fold hinge zone), also influenced the location of the mineralization. |
| 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. |
| GEOSCAN ID | 313644 |
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