General Information
Secondary Commodities: gold, mercury, antimony, arsenic
Deposit Type(s): Orogenic Au
Location(s): 64.1510 N, -132.110940 W
NTS Mapsheet(s): 106C01
Location Comments: Coordinates supplied by ATAC 2019
Hand Samples Available at YGS: No
Capsule
WORK HISTORY
Staked within OS cl 1-1076 (YD69730) in Sep/2010 by ATAC Resources Ltd. The claims were staked following the discovery of Carlin-type gold mineralization at the company’s Osiris zone/occurrence (Minfile Occurrence #106C 045) located 13 km to the west.
In 2011 ATAC Resources carried out a regional stream sediment survey over the OS claims and all areas located east of the Osiris occurrence.
In 2012 ATAC Resources carried out prospecting, follow-up detailed silt sampling and contour and ridge and spur soil sampling on the OS claims. In Oct/2012 the company announced the discovery of Carlin-type and gold-bearing quartz vein mineralization at the Pharaoh occurrence.
Soil sampling in 2012 showed up to 300 ppm arsenic and up to 50 ppb gold.
GEOLOGY
Reconnaissance silt sampling carried out in 2011 by ATAC Resources identified a mercury stream sediment anomaly draining the occurrence area. Follow-up silt sampling and contour and ridge and spur soil sampling identified intermittent anomalous clusters of antimony, arsenic and gold responses along a 6 km trend. Prospecting near the head of the main drainage system within the eastern half of the target identified two distinct structural systems. The first is compromised dominantly of northwest trending quartz veins while the second consists of northerly trending breccia/vein zones mineralized with varying amounts of Carlin-style indicator minerals that include stibnite (antimony), cinnabar (mercury) and realgar (arsenic).
Initial prospecting located northwest trending quartz veins ranging in width from 30 to 50 cm along a 900 m section of ridge line in the eastern part of the Pharaoh anomaly. The veins are distinctly hydrothermal in origin and are commonly pitted and fractured and often contain limonite and or moderate oxidation indicating the presence of pre-existing sulphide. Black stylolitic fractures occur in some specimens and these particular samples have been noted to contain varying amounts of visible gold. Gold values from quartz vein material ranged from below detection limit to 79.4 g/t gold.
Carlin-style mineralization occurs in north trending shear and breccia zones located approximately 500 to 1 000 m to the north of the gold bearing quartz veins. Where exposed, the shear and breccia zones range in width from 10 to 50 cm and are commonly silicified. Mineralization consists of variable concentrations of blebbly to disseminated stibnite, realgar, cinnabar and/or associated oxides and sulphates. Based on limited rock sampling, the area returned extremely elevated antimony, mercury and arsenic values. Gold values ranged from below detection to 0.28 g/t gold.
ATAC Resources has not yet carried out detailed geological mapping in the vicinity of the Pharaoh occurrence. Observations recorded during prospecting suggest the area is underlain by carbonate and calcareous clastic stratigraphy that is overlain by siliciclastic rocks which the company noted were similar in appearance to the geological setting at the Conrad zone (Minfile Occurrence #106C 05) located approximately 12 km to the west. Geological mapping completed by Colpron et al., supports this interpretation. The Carlin-style mineralization (where the Minfile map symbol is located) is hosted along the boundary of units PNw (Basal - Nadaleen Assemblage) and unit PNl (Lower Nadaleen Assemblage) which is similar to the Conrad occurrence area. However the area is lacking unit PSc (Stenbraten Assemblage – Lower) the “carbonate marker unit” which typically hosts Carlin-type mineralization. The area hosting the gold mineralized quartz veins is located approximately 900 m to the south and occurs at the boundary of units PNq and PNl (both belonging to Lower Nadaleen Assemblage).
Staked within OS cl 1-1076 (YD69730) in Sep/2010 by ATAC Resources Ltd. The claims were staked following the discovery of Carlin-type gold mineralization at the company’s Osiris zone/occurrence (Minfile Occurrence #106C 045) located 13 km to the west.
In 2011 ATAC Resources carried out a regional stream sediment survey over the OS claims and all areas located east of the Osiris occurrence.
In 2012 ATAC Resources carried out prospecting, follow-up detailed silt sampling and contour and ridge and spur soil sampling on the OS claims. In Oct/2012 the company announced the discovery of Carlin-type and gold-bearing quartz vein mineralization at the Pharaoh occurrence.
Soil sampling in 2012 showed up to 300 ppm arsenic and up to 50 ppb gold.
GEOLOGY
Reconnaissance silt sampling carried out in 2011 by ATAC Resources identified a mercury stream sediment anomaly draining the occurrence area. Follow-up silt sampling and contour and ridge and spur soil sampling identified intermittent anomalous clusters of antimony, arsenic and gold responses along a 6 km trend. Prospecting near the head of the main drainage system within the eastern half of the target identified two distinct structural systems. The first is compromised dominantly of northwest trending quartz veins while the second consists of northerly trending breccia/vein zones mineralized with varying amounts of Carlin-style indicator minerals that include stibnite (antimony), cinnabar (mercury) and realgar (arsenic).
Initial prospecting located northwest trending quartz veins ranging in width from 30 to 50 cm along a 900 m section of ridge line in the eastern part of the Pharaoh anomaly. The veins are distinctly hydrothermal in origin and are commonly pitted and fractured and often contain limonite and or moderate oxidation indicating the presence of pre-existing sulphide. Black stylolitic fractures occur in some specimens and these particular samples have been noted to contain varying amounts of visible gold. Gold values from quartz vein material ranged from below detection limit to 79.4 g/t gold.
Carlin-style mineralization occurs in north trending shear and breccia zones located approximately 500 to 1 000 m to the north of the gold bearing quartz veins. Where exposed, the shear and breccia zones range in width from 10 to 50 cm and are commonly silicified. Mineralization consists of variable concentrations of blebbly to disseminated stibnite, realgar, cinnabar and/or associated oxides and sulphates. Based on limited rock sampling, the area returned extremely elevated antimony, mercury and arsenic values. Gold values ranged from below detection to 0.28 g/t gold.
ATAC Resources has not yet carried out detailed geological mapping in the vicinity of the Pharaoh occurrence. Observations recorded during prospecting suggest the area is underlain by carbonate and calcareous clastic stratigraphy that is overlain by siliciclastic rocks which the company noted were similar in appearance to the geological setting at the Conrad zone (Minfile Occurrence #106C 05) located approximately 12 km to the west. Geological mapping completed by Colpron et al., supports this interpretation. The Carlin-style mineralization (where the Minfile map symbol is located) is hosted along the boundary of units PNw (Basal - Nadaleen Assemblage) and unit PNl (Lower Nadaleen Assemblage) which is similar to the Conrad occurrence area. However the area is lacking unit PSc (Stenbraten Assemblage – Lower) the “carbonate marker unit” which typically hosts Carlin-type mineralization. The area hosting the gold mineralized quartz veins is located approximately 900 m to the south and occurs at the boundary of units PNq and PNl (both belonging to Lower Nadaleen Assemblage).
Location Map
Last Updated: Dec 3, 2019
Work History
Year | Work Type | Comment |
---|---|---|
2012 | Geochemistry: Rock | Sampling of quartz veins and area hosting Carlin-type mineralization. |
2012 | Geochemistry: Silt | Detailed sampling. |
2012 | Geochemistry: Soil | Contour and ridge and spur sampling. |
2012 | Other: Prospecting | Following up on geochemical results. |
2011 | Geochemistry: Silt | Regional silt anomaly. |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup: Windermere
Group/Suite: Hay Creek
Formation: Ice Brook
Member:
Terrane: Laurentia
Period Max: Cryogenian
Age Max: 717 MA
Period Min: Ediacaran
Age Min: 635 MA
Rock Major: sandstone, siltstone, mudstone, wacke
Rock Minor: diamictite, conglomerate, olistoliths of quartzite and limestone (Katherine & Little Dal?)
Reference: Moynihan (2016) - YGS OF 2016-2
Geological Unit (1M): uPHC
Geological Unit (250K): uPHC4
Assessment Reports that overlap occurrence
Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
---|---|---|---|---|---|
096607 | 2012 | Assessment Report Describing Metallurgical Testing, Wildlife Monitoring, Heritage Evaluation, and Water Quality and Climate Monitoring Surveys | Water - Geochemistry, Metallurgical Tests - Lab Work/Physical Studies, Environmental Assessment/Impact - Studies, Heritage/Archeological - Studies | ||
096597 | 2012 | Assessment Report Describing Geochemical Sampling, Auger Sampling, Geological Mapping, Diamond Drilling, and Geophysical Surveys | Air Strip - Development, Surface, Auger - Drilling, Diamond - Drilling, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, EM - Ground Geophysics, Gravity Survey - Ground Geophysics, Magnetics - Ground Geophysics, Prospecting - Other, Hand - Trenching | 172 | 37340.37 |
095938 | 2011 | Assessment Report Describing Geochemical Sampling, Geological Mapping and Remote Sensing Surveys at the Rackla Gold Property | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, LIDAR - Remote Sensing, Heritage/Archeological - Studies | ||
095712 | 2010 | Assessment Report Describing Geochemical Sampling, Geological Mapping, Diamond Drilling and Geophysical Surveys at the Nadaleen Trend Property | ZTEM - Airborne Geophysics, Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Regional Bedrock Mapping - Geology, Prospecting - Other | 9 | 1898.28 |
Related References
Number | Title | Page(s) | Document Type |
---|---|---|---|
2013-13 | Geological map of the Rackla belt, east-central Yukon (NTS 106C/1-4, 106D/1) | Open File (Geological - Bedrock) | |
YEG2013_11 | Bedrock Geology of NTS 106B/04, Eastern Rackla Belt | 147-167. | Annual Report Paper |
2014-1 | Geological map of NTS 106B/04, east-central Yukon | Open File (Geological - Bedrock) | |
YEG2011_OV | Yukon Exploration and Geology Overview 2011 | 24-25, 67, 73. | Annual Report |
YEG2012_OV | Yukon Exploration and Geology Overview 2012 | 33-34, 62, 65. | Annual Report |
Citations |
---|
ATAC RESOURCES LTD, Jan/2016, Web Site. www.atacresources.com. |
ATAC RESOURCES LTD, Jun/2013. Management Discussion and Analysis for the Three months and Six months ended June 30, 2013 (including any Significant Events to August 15, 2013), pg. 16-17. (Available on SEDAR). |
ATAC RESOURCES LTD, New Release. 29 Jul/2010, 15 Sep/2010, 20 Oct/2010, 28 Oct/2010, 31 May/2011, 15 May/2012, 3 Oct/2012, 21 Nov/2012, 23 Jan/2013, 14 Jan/2014, 15 Apr/2014. |
BLUSSON, S.L., 1974. Five geological maps of northern Selwyn Basin (Operation Stewart), Yukon Territory and District of Mackenzie, N.W.T.; Geological Survey of Canada, Open File 205, 1974. |
HORNBROOK, E.H.W., AND FRISKE, P.W. B., 1990. Regional stream sediment and water geochemical data, East Central Yukon (106D, parts of 106c, 106E and 106F). Geological Survey of Canada Open File 2175. |