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TitleMacroscopic control on Carlin-type gold mineralization in north-central Yukon
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPinet, N; Sack, P J
SourceTargeted Geoscience Initiative: 2018 report of activities; by Rogers, N (ed.); Geological Survey of Canada, Open File 8549, 2019 p. 89-103, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Targeted Geoscience Initiative: 2018 report of activities
RelatedThis publication is related to Whole-rock geochemistry of samples from Carlin-type gold zones, Nadaleen trend, Yukon
File formatpdf
NTS106C/01; 106C/02
AreaNadaleen River
Lat/Long WENS-133.0000 -132.0000 64.1667 64.0500
Subjectseconomic 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
Illustrationslocation maps; geoscientific sketch maps; photographs; cross-sections; geophysical logs; profiles; charts; plots; schematic representations; lithologic sections
ProgramTargeted Geoscience Initiative (TGI-5) Knowledge Management Coordination
ProgramTargeted Geoscience Initiative (TGI-5) Gold ore systems - tectonic drivers and conduits
Released2019 03 01
AbstractThis 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.

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