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Occurrence Details


Occurrence Number
106C 124
Occurrence Name
Orion
Occurrence Type
Hard-rock
Status
Prospect


General Information

Secondary Commodities: gold
Deposit Type(s): Carbonate-Hosted Disseminated Au-Ag (Carlin-type)
Location(s): 64.124140 N, -132.559460 W
NTS Mapsheet(s): 106C02
Location Comments: Coordinates supplied by ATAC 2019
Hand Samples Available at YGS: No

Capsule

Work History
 
In early November 2009, ATAC Resources staked Dale cl 1-12 (YD0853) which covers the location of the current Orion occurrence (although the occurrence itself was not discovered until 2015).
 
In June 2010, the company flew an airborne ZTEM geophysical survey over eastern end of the larger Rau Gold Belt, including the Orion occurrence. The Rau Gold Belt covers the company’s entire claim holdings in the region and includes the Tiger deposit (MINFILE occurrence 106D 098) located approximately 100 km to the west.
 
In 2011, ATAC Resources focused their exploration work on exploring the Nadaleen Trend portion of their Rackla Gold Belt. In 2012, the company carried out soil sampling at the Orion occurrence and performed prospecting in 2014.
 
In 2015, ATAC Resources used a rotary air blast (RAB) drill to test several targets hosting Carlin-type mineralization in the area, which led to the discovery of the Orion occurrence located 300 m west of the Anubis occurrence. 
 
In 2016, both RAB and diamond drill holes were collared in the area. Work was done on the Orion project by Barrick Gold Corp. in 2017 as an earn-in agreement to option the claims, however, reports are unavailable at this time. Barrick terminated the option agreement in 2018 following a diamond drill program.

Regional & Property Geology

The occurrence area is located in east-central Yukon within an area geologists have referred to as the Rackla belt. The Rackla belt straddles the northern edge of the Selwyn basin, where Neoproterozoic to Paleozoic rocks of the basin are juxtaposed against Paleozoic and older slope and basin rocks of the Ogilvie platform along the Dawson thrust zone. Selwyn basin rocks in the occurrence area are dominated by slope and facies carbonate, clastic rocks and siltstone with significant deep water black shale and chert, whereas the Ogilvie platform is dominated by shallow water platformal carbonate.
 
Based on geological mapping by Colpron et al. and geologists employed by ATAC Resources, the Anubis occurrence area (or cluster) is underlain by mid-Paleozoic limestone, silty limestone, shales and calcareous siltstones that are cut by a network of regional scale faults. The oldest unit (unit mDc) is a Middle Devonian crinoid limestone. It is overlain by shale, mudstone and siltstone assigned to the Upper Devonian to Lower Mississippian Earn Group (unit DME). ATAC Resources has broken this unit into individual rock units. The sequence is overlain by Mississippian fossiliferous limestone (unit Mc). Faults (thrust?) located to the south and north fold the entire sequence into a syncline. It should be noted that Colpron’ s geology map places the Anubis occurrence within Middle Devonian crinoidal limestone (unit mDc) where in fact the occurrence lies 100 m to the east, in Middle Devonian to Lower Mississippian calcareous mudstone (ATAC Resources unit mDMc).

Mineralization & Results

The Dale claims were staked to cover an arsenic silt anomaly discovered in a creek which cut through the northern half of the claim block. The Sten, T and ST claims were staked to cover the potential western trend of Carlin-type mineralization discovered at the “Osiris cluster” located approximately 10 km to the east. Regional silt and soil sampling carried out in 2011 outlined numerous anomalies in the occurrence area. Detailed follow-up sampling carried out early in the 2012 exploration season outlined a 1 km northwest trending linear gold-in-soil anomaly within a larger and open ended 1.5 by 2.5 km arsenic, thallium, antimony and mercury soil anomaly. The trace of the gold in-soil anomaly coincides with a well-defined recessive regional-scale lineament interpreted to represent a steeply northeast dipping fault analogous to the structural setting of the Conrad zone (MINFILE occurrence 106C 055) located approximately 15 km to the east.

The Orion target is located 300 m west of the Anubis discovery hole An-12-001 (8.51 m of 19.85 g/t gold) in an area of strongly anomalous gold in soil geochemical response that had not been previously drill tested. Mineralization at Orion occurs in both a debris flow-bearing fossiliferous limestone and a variably calcareous pyritic siltstone, but is most prevalent in a highly deformed and fractured structural setting in the hanging wall pyritic siltstone assemblage where a secondary cross fault intersects the Anubis Fault.
In 2015, ATAC Resources drilled 5 RAB holes from the same pad set-up with ARB-15-026 being the only hole oriented north to test the pyritic siltstone. ARB-15-026 ended in gold mineralization. Diamond drilling at Orion in 2016 returned intervals of significant gold mineralization up to 2.75 g/t Au over 61.29 m, including 3.98 g/t Au over 14.61 m and 3.92 g/t Au over 13.15 m (see atacresources.com).

Location Map

Last Updated: Apr 23, 2020

Work History

Year Work Type Comment
2017 Drilling: Diamond 4 drill holes
2017 Drilling: RAB (Rotary Air Blast)
2017 Ground Geophysics: Gravity Survey
2016 Drilling: Diamond 9 drill holes
2016 Drilling: RAB (Rotary Air Blast) 12 drill holes
2015 Drilling: RAB (Rotary Air Blast) 9 holes
2014 Geochemistry: Rock
2013 Geochemistry: Rock
2012 Geochemistry: Soil
2011 Remote Sensing: LIDAR
2010 Airborne Geophysics: ZTEM

Regional Geology - Terrane

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Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
097079 2016 Assessment Report Describing Diamond and Rotary Air Blast (RAB) Drilling at the Anubis Cluster of the Rackla Gold Property Diamond - Drilling, RAB (Rotary Air Blast) - Drilling 43 3215.67
096933 2015 Assessment Report Describing Geochemical Sampling, Diamond Drilling and RAB Drilling along the Nadaleen Trend of the Rackla Gold Property Diamond - Drilling, Rotary - Drilling 32 1771.74
096810 2014 Assessment Report Describing Geochemical Sampling, Excavator Trenching, Geological Mapping, Auger and Diamond Drilling Along the Nadaleen Trend of the Rackla Gold Property Auger - Drilling, Diamond - Drilling, Rock - Geochemistry, Backhoe - Trenching 59 4733
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
095680 2009 Assessment Report Describing Geochemical Sampling Soil - Geochemistry, Prospecting - Other

Related References

Number Title Page(s) Document Type
Citations
ATAC RESOURCES LTD, Aug/2017, Assessment Report #097079 by J. Lane and D. Walsh.
ATAC RESOURCES LTD, Feb/2020. Web Site: www.atacresources.com
ATAC RESOURCES LTD, May/2018, Assessment Report #097137 by J. Lane and A. Coulter
ATAC RESOURCES LTD, New Release, 12 Dec/2018, 17 Jan/2018, 7 Nov/2016, 12 Sept/2016, 22 Aug/2016, and 25 Aug/2015.
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.
TUCKER, M.J., Mar/2015. Geology, Mineralization and Geochronology of the Conrad Zone Carlin-type prospect, East-Central Yukon Territory, Canada. Master of Science in the Faculty of Graduate and Postdoctoral Studies (Geological Sciences), The University of British Columbia, Vancouver B.C.213 p.

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