| Title | Macroscopic control on Carlin-type gold mineralization in north-central Yukon |
| Download | Download (whole publication) |
| 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 Rogers, N; (2019). Targeted
Geoscience Initiative: 2018 report of activities, Geological Survey of Canada, Open File 8549 |
| 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; ore systems approach; Carlin-type deposits; rudstones; floatstones; 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. |
| GEOSCAN ID | 313644 |
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