General Information
Secondary Commodities: gold, thallium, arsenic, antimony, mercury
Aliases: Anubis Cluster
Deposit Type(s): Carbonate-Hosted Disseminated Au-Ag (Carlin-type)
Location(s): 64.122240 N, -132.555930 W
NTS Mapsheet(s): 106C02
Location Comments: Coordinates supplied by ATAC 2019
Hand Samples Available at YGS: No
Capsule
Work History
In early Nov/2009 ATAC Resources staked Dale cl 1-12 (YD0853) just north of the occurrence. The occurrence was staked within Sten cl 55 -142 (YD10405) later in the month.
In Jun/2010 the company flew an airborne ZTEM geophysical survey over eastern end of the larger Rau Gold Belt, which this occurrence lies within. 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. The company carried out remote sensing studies over the entire trend and carried out extensive regional silt and soil sampling surveys over the Anubis occurrence area. In 2012 the company carried out follow-up silt, soil and rock sampling programs over the Anubis occurrence area. Following receipt of geochemical results the company prospected and hand trenched favorable areas. In the fall of 2012 ATAC Resources collared 6 diamond drill holes (1 011.26 m) on and around the occurrence location.
In 2013 the company carried out trenching, prospecting and soil sampling in the occurrence area.
In 2014 ATAC Resources prospected and sampled numerous soil geochemical anomalies and Carlin-type mineralized zones previously located within the Anubis cluster. The company also used an excavator to trench and sample various mineralized zones and employed an overburden auger drill to try and locate the bedrock source of mineralization. Later in the summer ATAC Resources collared 3 diamond drill holes (714.75 m) on the Anubis occurrence.
In 2015 ATAC Resources used a rotary air blast (RAB) drill to test several targets hosting Carlin-type mineralization located within the Anubis Cluster.
In 2018, one hole was collared into the Anubis zone.
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).
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.
Prospecting and hand trenching outlined several mineralized outcrops. The Anubis discovery outcrop consists of a partially exposed outcrop of highly fracture, strongly folded, silicified and decalcified limestone breccia located within a sequence of calcareous siltstone and shale units situated along a regional fault zone which ATAC Resources refers to as the Anubis fault. Four grab rock samples collected along the exposure returned 139.0 g/t gold, 125.0 g/t gold, 122.0 g/t gold and 84.2 g/t gold. One grab sample consisting of less altered calcareous siltstone talus collected beneath the outcrop occurrence and along slope returned 5.01 g/t gold.
Diamond drill hole AN-12-001 (discovery hole & occurrence location) targeted the down-dip extension of the discovery outcrop. It intersected 8.51 m of 19.85 g/t gold within a broader 20 m interval of alteration and elevated arsenic response. Drill holes AN-12-002 and 003 targeted the on-section, down-dip potential of the discovery hole (AN-12-001). Hole AN-12-003 intersected a broad zone of high-grade gold mineralization that yielded 9.08 g/t gold over 16.76 m (69.19 m to 85.95 m) and bottomed in 4.54 g/t gold over 1.52 m (153.01 to 154.53 m) while hole AN-12-002 intersected 0.88 g/t gold over 7.69 m (117.96 m to 125.65 m).
ATAC Resources 2013 soil sampling program focused on areas located on a northwest trend radiating out from the Anubis occurrence. Results outlined a northwest trending 12 square km gold and pathfinder element geochemical anomaly centered within a major fault network. Follow-up soil sampling, geological mapping, prospecting and excavator trenching around the Ana and Anubis zones helped vector in the sources of mineralization and refine the location of the faults and broad geological contacts. Prospecting and trenching of previously detected soil anomalies identified six new Carlin-type gold showings; Corona, Columba, Dorado, Draco, Zodiac and Lyra within the broader “Anubis cluster”. These six showings are covered by other Minfile occurrences.
Soil sampling, trenching and auger drilling carried out in 2014 increased the size of the regional gold and pathfinder element geochemical anomaly to 18 square kms. In addition the surface exploration program helped ATAC Resources to: 1) better define geochemical anomalies and track the geochemical response back to areas of bedrock alteration; 2) trace known faults; and 3) identify new intersecting structures that are potential feeder systems for mineralizing fluids. Excavator trenching along the Anubis fault was particularly successful in identifying areas of complex faulting that are enveloped by zones of hydrothermal alteration. Trenching of host limestone and calcareous shale returned gold values from below detection up to 2.30 g/t gold.
In early Nov/2009 ATAC Resources staked Dale cl 1-12 (YD0853) just north of the occurrence. The occurrence was staked within Sten cl 55 -142 (YD10405) later in the month.
In Jun/2010 the company flew an airborne ZTEM geophysical survey over eastern end of the larger Rau Gold Belt, which this occurrence lies within. 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. The company carried out remote sensing studies over the entire trend and carried out extensive regional silt and soil sampling surveys over the Anubis occurrence area. In 2012 the company carried out follow-up silt, soil and rock sampling programs over the Anubis occurrence area. Following receipt of geochemical results the company prospected and hand trenched favorable areas. In the fall of 2012 ATAC Resources collared 6 diamond drill holes (1 011.26 m) on and around the occurrence location.
In 2013 the company carried out trenching, prospecting and soil sampling in the occurrence area.
In 2014 ATAC Resources prospected and sampled numerous soil geochemical anomalies and Carlin-type mineralized zones previously located within the Anubis cluster. The company also used an excavator to trench and sample various mineralized zones and employed an overburden auger drill to try and locate the bedrock source of mineralization. Later in the summer ATAC Resources collared 3 diamond drill holes (714.75 m) on the Anubis occurrence.
In 2015 ATAC Resources used a rotary air blast (RAB) drill to test several targets hosting Carlin-type mineralization located within the Anubis Cluster.
In 2018, one hole was collared into the Anubis zone.
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).
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.
Prospecting and hand trenching outlined several mineralized outcrops. The Anubis discovery outcrop consists of a partially exposed outcrop of highly fracture, strongly folded, silicified and decalcified limestone breccia located within a sequence of calcareous siltstone and shale units situated along a regional fault zone which ATAC Resources refers to as the Anubis fault. Four grab rock samples collected along the exposure returned 139.0 g/t gold, 125.0 g/t gold, 122.0 g/t gold and 84.2 g/t gold. One grab sample consisting of less altered calcareous siltstone talus collected beneath the outcrop occurrence and along slope returned 5.01 g/t gold.
Diamond drill hole AN-12-001 (discovery hole & occurrence location) targeted the down-dip extension of the discovery outcrop. It intersected 8.51 m of 19.85 g/t gold within a broader 20 m interval of alteration and elevated arsenic response. Drill holes AN-12-002 and 003 targeted the on-section, down-dip potential of the discovery hole (AN-12-001). Hole AN-12-003 intersected a broad zone of high-grade gold mineralization that yielded 9.08 g/t gold over 16.76 m (69.19 m to 85.95 m) and bottomed in 4.54 g/t gold over 1.52 m (153.01 to 154.53 m) while hole AN-12-002 intersected 0.88 g/t gold over 7.69 m (117.96 m to 125.65 m).
ATAC Resources 2013 soil sampling program focused on areas located on a northwest trend radiating out from the Anubis occurrence. Results outlined a northwest trending 12 square km gold and pathfinder element geochemical anomaly centered within a major fault network. Follow-up soil sampling, geological mapping, prospecting and excavator trenching around the Ana and Anubis zones helped vector in the sources of mineralization and refine the location of the faults and broad geological contacts. Prospecting and trenching of previously detected soil anomalies identified six new Carlin-type gold showings; Corona, Columba, Dorado, Draco, Zodiac and Lyra within the broader “Anubis cluster”. These six showings are covered by other Minfile occurrences.
Soil sampling, trenching and auger drilling carried out in 2014 increased the size of the regional gold and pathfinder element geochemical anomaly to 18 square kms. In addition the surface exploration program helped ATAC Resources to: 1) better define geochemical anomalies and track the geochemical response back to areas of bedrock alteration; 2) trace known faults; and 3) identify new intersecting structures that are potential feeder systems for mineralizing fluids. Excavator trenching along the Anubis fault was particularly successful in identifying areas of complex faulting that are enveloped by zones of hydrothermal alteration. Trenching of host limestone and calcareous shale returned gold values from below detection up to 2.30 g/t gold.
Location Map
Last Updated: Feb 12, 2020
Work History
Year | Work Type | Comment |
---|---|---|
2018 | Drilling: Diamond | One hole |
2015 | Drilling: RAB (Rotary Air Blast) | Used to test targets. |
2014 | Drilling: Auger | Used auger drill to try and locate bedrock. |
2014 | Drilling: Diamond | Three holes (714.5 m) on Anubis target. |
2014 | Geochemistry: Rock | Prospected and sampled areas identified as anomalous. |
2014 | Trenching: Backhoe | Trenched and sampled favorable areas. |
2013 | Geochemistry: Soil | Extended grid sampling to northwest and south. |
2013 | Other: Prospecting | Prospected and rock sampled anomalous areas, also rock sampled trenches. |
2013 | Trenching: Backhoe | Trenched areas identified as anomalous. |
2012 | Drilling: Diamond | Six diamond drill holes (1,011 m) centered over three areas. |
2012 | Geochemistry: Rock | Collected while prospecting initial anomalies. |
2012 | Geochemistry: Silt | Follow-up sampling. |
2012 | Geochemistry: Soil | Follow-up grid, contour and ridge and spur sampling. |
2011 | Geochemistry: Rock | Collected as needed while conducting silt and soil sampling. |
2011 | Geochemistry: Silt | Regional survey. |
2011 | Geochemistry: Soil | Regional survey. |
2011 | Remote Sensing: LIDAR | Collected over entire Nadaleen trend. |
2011 | Trenching: Hand | Trenched anomalous areas. |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite: Earn
Formation:
Member:
Terrane: Laurentia
Period Max: Devonian
Age Max: 385 MA
Period Min: Carboniferous
Age Min: 345 MA
Rock Major: shale, sandstone, conglomerate
Rock Minor: chert
Reference: Colpron et al. (2013) - YGS OF 2013-13
Geological Unit (1M): DME
Geological Unit (250K): DME1
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 |
Related References
Number | Title | Page(s) | Document Type |
---|---|---|---|
YEG2010_OV | Yukon Exploration and Geology Overview 2010 | 23-24, 60, 65. | Annual Report |
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 |
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 |
2014-1 | Geological map of NTS 106B/04, east-central Yukon | Open File (Geological - Bedrock) | |
YEG2013_OV | Yukon Exploration and Geology Overview 2013 | 26-27, 42, 47. | Annual Report |
YEG2014_OV | Yukon Exploration and Geology Overview 2014 | 23-24, 40, 42. | Annual Report |
YEG2015_OV2 | Yukon Hard Rock Mining, Development and Exploration Overview 2015 | 28, 43, 46. | Annual Report Paper |
Citations |
---|
ATAC RESOURCES LTD, Aug/2014. Assessment Report # 096725 by J. Lane and R. Phillips. |
ATAC RESOURCES LTD, Dec/2015. 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, p. 18. (Available on SEDAR). |
ATAC RESOURCES LTD, New Release. 8 Mar/2010, 29 Jul/2010, 20 Oct/2010, 28 Oct/2010, 31 May/2011, 13 Dec/2011, 1 Mar/2012, 15 May/2012, 21 Aug/2012, 17 Sep/2012, 3 Oct/2012, 24 Oct/2012, 21 Nov/2012, 23 Jan/2013, 9 Apr/2013, 17 Jun/2013, 9 Oct/2013, 12 Nov/2013, 12 Jan/2014, 15 Apr/2014, 16 Jun/2014, 26 Aug/2014, 28 Oct/2014, 24 Mar/2015, 22 Jun/2015, 25 Aug/2015, 10 Feb/16, 12 Dec/18 |
Blusson, S.L. 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. 105N, 105O, 106A, 106B, 106C, scale 1:250 000. |
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. |