General Information
Secondary Commodities: uranium, gold
Aliases: Aril, Horn
Deposit Type(s): Skarn Au
Location(s): 64.441110 N, -138.622780 W
NTS Mapsheet(s): 116B07
Location Comments: .5 Kilometres
Hand Samples Available at YGS: Yes
Capsule
Work History
Staked in Sep/76 following airborne radiometric surveys as Gril cl 1-4 (YA9545) by Prism Syndicate (Prism Resources Ltd, Canex Placer, Granby Mines Ltd and Chieftain Development Company Ltd) and as Sumting cl 1-22 (YA9486) to the southwest in Sep/77 by Ukon Joint Venture (Chevron and Kerr Addison mines Ltd). Ukon Joint Venture carried out geological mapping, prospecting, geochemical sampling and radiometric surveying in 1977.
In Aug/91, R. Berdahl staked Wall cl 1-7 (YB40204) 4 km to the north.
Partially restaked as the Horn cl 1-18 (YC03762) in Mar/97 by Canadian United Minerals Ltd, which staked Horn cl 19-22 (YC03780) 3 km to the north at the same time. The company carried out prospecting and geochemical sampling later in 1997; prospecting, geochemical sampling, magnetometer surveying and trenching in 1998; additional trenching and sampling, geological mapping, detailed magnetometer surveying and drilling of 10 holes (114.85 m) in 1999; magnetometer, MaxMin EM and test I.P. surveying, trenching, geological mapping and drilling of 8 holes (359 m) in 2000; and geological mapping of some previously excavated trenches and drilling of 26 holes (1 039.05 m) and in 2001.
Capsule Geology
The claims cover a roof pendant of Permian to Jurassic aged limestone and slate 3.2 km long and 0.8 km wide within a pseudoleucite tinguaite phase of the mid-Cretaceous Tombstone syenite stock.
Work in the late 1970¿s identified minor amounts of disseminated uraninite occur in linear zones within the tinguaite, and grab sample assays returned up to 0.35% U3O8. Radiometric anomalies were found associated with skarn zones developed along the limestone-syenite contact and with narrow dykes cutting slates, but the best grab samples from these areas assayed only 0.02% U308.
In 1997 Canadian United began reevaluating the skarns for their Au bearing potential, based on the proximity of the claims to the Marn Cu-Au skarn deposit (Minfile Occurrence # 116B 147) which is located 7.5 km to the west-northwest. Reconnaissance soil sampling returned values up to 39.33 g/t Au, 33.4 g/t Ag and 2 700 ppm Cu and followup prospecting and trenching revealed the presence of high grade gold mineralization in massive to semi-massive pyrrhotite skarn developed in a lense within a layer of Permian Takhandit Formation limestone overlayen by Jurassic aged schist.
Channel sampling of the discovery trench in 1999 returned values of 58.9 and 85.44 g/t Au over widths of 5.94 and 4.45 m, respectively. Ten short holes were drilled from the floor of the trench, seven of which intersected mineralized skarn. Significant intersections included 11.03 m grading 21.6 g/t Au from Hole 99-04 and 5.3 m grading 180.8 g/t Au from Hole 99-11.
In 2000 an extensive magnetic anomaly, with peak readings of over 2 000 gammas above local background, was identified south of the main showing in a rubble covered area possibly underlain by intrusive rock. This work served to approximately define the trend of the contact with the sedimentary rocks that host the main showing to the north. Three low order magnetic anomalies associated with this trend probably represent pyrrhotite bearing skarn. EM and I.P. surveying was hampered by the steepness of the local terrain and by the rocky nature of the overburden over much of the survey area and limited the effectiveness of these surveys. Trenching to extend previously excavated areas as a followup to the geophysical surveying was mostly inconclusive, except for trench T00-01 at the site of the main showing which exposed a 4.6 m width of massive to semi-massive pyrrhotite skarn which was chip sampled but not assayed.
Seven drill holes were completed in 2000, from three setups, to further test the main zone. Visible gold associated with siliceous sections within generally narrow skarn intersections were logged in four of the holes. Holes HS 00-06 and 07, drilled 15 m west of the main showing, contained only minor amounts of pyrrhotite and limit the westery extent of the mineralized zone which remains open down dip and to the east.
Drilling in 2001 investigated other magnetic anomalies in the vicinity of the main showing with half the holes being drilled on an anomaly located approximately 225 m east-southeast of the main showing. Skarn and associated gold mineralization were found to be related to a narrow syenitic dyke in this area. Folding of the the receptive limestone layer at a depth of approximately 50 m limits the down dip potential of this target area.
Prospecting, 400 m east of the main showing, revealed numerous pieces of gold bearing gossanous float located in and above a talus fan. Grab samples of float from this area returned numerous high grade results, with peak values up to 168.49 g/t Au.
The claims now lie within the boundaries of the Tombstone Territorial Park, but as they were staked prior to an order in council prohibiting claim staking in this area the company retains the right to work the claims pursuant to the conditions of their current mining land use authorization.
References
BREMNER, T.J., 1994. Proposed Tombstone Park ¿ Preliminary Review of Mineral Potential. Exploration and Geological Services Division, Indian and Northern Affairs Canada. Open File 1994-2(T), 115 p.
CANADIAN UNITED MINERALS INC, Aug/98. Assessment Report #093934 by S. Ryan.
CANADIAN UNITED MINERALS INC, Sep/99. Assessment Report #094020 by S. Ryan.
CANADIAN UNITED MINERALS INC, Jan/2000. Assessment Report #094068 by D. Tenny.
CANADIAN UNITED MINERALS INC, Jun/2001. Assessment Report #094210 by D. Tenny.
CANADIAN UNITED MINERALS INC, Jun/2001. Assessment Report #094299 by D. Tenny.
GEOLOGICAL SURVEY OF CANADA Paper 77-1B, p. 37-45.
HART, C.J.R., BAKER, T. and BURKE, M., 2000. New Exploration Concepts for Country-Rock-Hosted, Intrusion Related Gold Systems: Tintina Gold Belt in Yukon. In: The Tintina Gold Belt: Concepts, Exploraiton and Discoveries, British Columbia and Yukon Chamber of Mines, Special Volume 2, p. 145-171.
MINERAL INDUSTRY REPORT 1977, p. 54.
THOMPSON, R.I., ROOTS, C.F. AND MUSTARD, P.S., 1992. Geology of Dawson map area (116B, C) (northeast of Tintina Trench); Geological Survey of Canada, Open File 2849 (13 sheets, scale: 1:50 000).
UKON JOINT VENTURE, Jan/78. Assessment Report #090272 by A.R. Archer.
YUKON EXPLORATION AND GEOLOGY 1998, p. 10, 27; 1999, p. 7-8; 2000, p. 16, 25, 27; 2001, p. 15, 24, 25.
Staked in Sep/76 following airborne radiometric surveys as Gril cl 1-4 (YA9545) by Prism Syndicate (Prism Resources Ltd, Canex Placer, Granby Mines Ltd and Chieftain Development Company Ltd) and as Sumting cl 1-22 (YA9486) to the southwest in Sep/77 by Ukon Joint Venture (Chevron and Kerr Addison mines Ltd). Ukon Joint Venture carried out geological mapping, prospecting, geochemical sampling and radiometric surveying in 1977.
In Aug/91, R. Berdahl staked Wall cl 1-7 (YB40204) 4 km to the north.
Partially restaked as the Horn cl 1-18 (YC03762) in Mar/97 by Canadian United Minerals Ltd, which staked Horn cl 19-22 (YC03780) 3 km to the north at the same time. The company carried out prospecting and geochemical sampling later in 1997; prospecting, geochemical sampling, magnetometer surveying and trenching in 1998; additional trenching and sampling, geological mapping, detailed magnetometer surveying and drilling of 10 holes (114.85 m) in 1999; magnetometer, MaxMin EM and test I.P. surveying, trenching, geological mapping and drilling of 8 holes (359 m) in 2000; and geological mapping of some previously excavated trenches and drilling of 26 holes (1 039.05 m) and in 2001.
Capsule Geology
The claims cover a roof pendant of Permian to Jurassic aged limestone and slate 3.2 km long and 0.8 km wide within a pseudoleucite tinguaite phase of the mid-Cretaceous Tombstone syenite stock.
Work in the late 1970¿s identified minor amounts of disseminated uraninite occur in linear zones within the tinguaite, and grab sample assays returned up to 0.35% U3O8. Radiometric anomalies were found associated with skarn zones developed along the limestone-syenite contact and with narrow dykes cutting slates, but the best grab samples from these areas assayed only 0.02% U308.
In 1997 Canadian United began reevaluating the skarns for their Au bearing potential, based on the proximity of the claims to the Marn Cu-Au skarn deposit (Minfile Occurrence # 116B 147) which is located 7.5 km to the west-northwest. Reconnaissance soil sampling returned values up to 39.33 g/t Au, 33.4 g/t Ag and 2 700 ppm Cu and followup prospecting and trenching revealed the presence of high grade gold mineralization in massive to semi-massive pyrrhotite skarn developed in a lense within a layer of Permian Takhandit Formation limestone overlayen by Jurassic aged schist.
Channel sampling of the discovery trench in 1999 returned values of 58.9 and 85.44 g/t Au over widths of 5.94 and 4.45 m, respectively. Ten short holes were drilled from the floor of the trench, seven of which intersected mineralized skarn. Significant intersections included 11.03 m grading 21.6 g/t Au from Hole 99-04 and 5.3 m grading 180.8 g/t Au from Hole 99-11.
In 2000 an extensive magnetic anomaly, with peak readings of over 2 000 gammas above local background, was identified south of the main showing in a rubble covered area possibly underlain by intrusive rock. This work served to approximately define the trend of the contact with the sedimentary rocks that host the main showing to the north. Three low order magnetic anomalies associated with this trend probably represent pyrrhotite bearing skarn. EM and I.P. surveying was hampered by the steepness of the local terrain and by the rocky nature of the overburden over much of the survey area and limited the effectiveness of these surveys. Trenching to extend previously excavated areas as a followup to the geophysical surveying was mostly inconclusive, except for trench T00-01 at the site of the main showing which exposed a 4.6 m width of massive to semi-massive pyrrhotite skarn which was chip sampled but not assayed.
Seven drill holes were completed in 2000, from three setups, to further test the main zone. Visible gold associated with siliceous sections within generally narrow skarn intersections were logged in four of the holes. Holes HS 00-06 and 07, drilled 15 m west of the main showing, contained only minor amounts of pyrrhotite and limit the westery extent of the mineralized zone which remains open down dip and to the east.
Drilling in 2001 investigated other magnetic anomalies in the vicinity of the main showing with half the holes being drilled on an anomaly located approximately 225 m east-southeast of the main showing. Skarn and associated gold mineralization were found to be related to a narrow syenitic dyke in this area. Folding of the the receptive limestone layer at a depth of approximately 50 m limits the down dip potential of this target area.
Prospecting, 400 m east of the main showing, revealed numerous pieces of gold bearing gossanous float located in and above a talus fan. Grab samples of float from this area returned numerous high grade results, with peak values up to 168.49 g/t Au.
The claims now lie within the boundaries of the Tombstone Territorial Park, but as they were staked prior to an order in council prohibiting claim staking in this area the company retains the right to work the claims pursuant to the conditions of their current mining land use authorization.
References
BREMNER, T.J., 1994. Proposed Tombstone Park ¿ Preliminary Review of Mineral Potential. Exploration and Geological Services Division, Indian and Northern Affairs Canada. Open File 1994-2(T), 115 p.
CANADIAN UNITED MINERALS INC, Aug/98. Assessment Report #093934 by S. Ryan.
CANADIAN UNITED MINERALS INC, Sep/99. Assessment Report #094020 by S. Ryan.
CANADIAN UNITED MINERALS INC, Jan/2000. Assessment Report #094068 by D. Tenny.
CANADIAN UNITED MINERALS INC, Jun/2001. Assessment Report #094210 by D. Tenny.
CANADIAN UNITED MINERALS INC, Jun/2001. Assessment Report #094299 by D. Tenny.
GEOLOGICAL SURVEY OF CANADA Paper 77-1B, p. 37-45.
HART, C.J.R., BAKER, T. and BURKE, M., 2000. New Exploration Concepts for Country-Rock-Hosted, Intrusion Related Gold Systems: Tintina Gold Belt in Yukon. In: The Tintina Gold Belt: Concepts, Exploraiton and Discoveries, British Columbia and Yukon Chamber of Mines, Special Volume 2, p. 145-171.
MINERAL INDUSTRY REPORT 1977, p. 54.
THOMPSON, R.I., ROOTS, C.F. AND MUSTARD, P.S., 1992. Geology of Dawson map area (116B, C) (northeast of Tintina Trench); Geological Survey of Canada, Open File 2849 (13 sheets, scale: 1:50 000).
UKON JOINT VENTURE, Jan/78. Assessment Report #090272 by A.R. Archer.
YUKON EXPLORATION AND GEOLOGY 1998, p. 10, 27; 1999, p. 7-8; 2000, p. 16, 25, 27; 2001, p. 15, 24, 25.
Location Map
Last Updated: Jun 27, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2001 | Drilling: Diamond | Twenty-six holes, 1,039 m. |
| 2001 | Geology: Bedrock Mapping | |
| 2001 | Trenching: Mechanical | |
| 2000 | Drilling: Diamond | Eight holes, 359 m. |
| 2000 | Geology: Bedrock Mapping | |
| 2000 | Ground Geophysics: Magnetics | Also Max-Min, EM and IP surveys. |
| 2000 | Trenching: Mechanical | |
| 1999 | Drilling: Diamond | Ten holes, 114.85 m. |
| 1999 | Geochemistry: Rock | |
| 1999 | Geology: Bedrock Mapping | |
| 1999 | Trenching | |
| 1998 | Geochemistry: Rock | |
| 1998 | Ground Geophysics: Magnetics | |
| 1998 | Other: Prospecting | |
| 1998 | Trenching: Mechanical | |
| 1997 | Geochemistry: Silt | Also rock and soil sampling. |
| 1997 | Other: Prospecting | |
| 1977 | Geochemistry: Rock | |
| 1977 | Geology: Bedrock Mapping | |
| 1977 | Ground Geophysics: Radiometric Survey | |
| 1977 | Other: Prospecting | |
| 1976 | Airborne Geophysics: Radiometric |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite: Bug Creek
Formation: 'Lower Schist'
Member:
Terrane:
Period Max: Jurassic
Age Max: 200 MA
Period Min: Jurassic
Age Min: 145 MA
Rock Major: slate
Rock Minor: siltstone
Reference: Thompson et al. (1994) - GSC OF 2849
Geological Unit (1M): JB
Geological Unit (250K): JB1
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 094299 | 2001 | Assessment Report on 2001 Exploration of the Horn 1-18 Claims | Reclamation - Development, Surface, Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Surveying - Other, Backhoe - Trenching | 29 | 1039 |
| 094210 | 2000 | Assessment Report on the 2000 Exploration of the Horn 1-18 Claims | Reclamation - Development, Surface, Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Detailed Bedrock Mapping - Geology, EM - Ground Geophysics, IP - Ground Geophysics, Magnetics - Ground Geophysics, Biophysical Mapping - Studies, Backhoe - Trenching | 8 | 359 |
| 094068 | 1999 | Report on 1998/99 Exploration of the Horn 1-18 Claims | Diamond - Drilling, Drill Core - Geochemistry, Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Metallurgical Tests - Lab Work/Physical Studies, Prospecting - Other, Backhoe - Trenching | 11 | 114.79 |
| 094020 | 1998 | Trenching and Geochemical Report on the Horn 1-18 Claims | Rock - Geochemistry, Soil - Geochemistry, Magnetics - Ground Geophysics, Prospecting - Other, Backhoe - Trenching, Handblast - Trenching | ||
| 093934 | 1997 | Prospecting Geochemical Survey Horn 1-22 | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Prospecting - Other | ||
| 090272 | 1977 | Assessment Report on the SUMTING 1-22 Claims | Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Gamma-ray Spectrometry - Ground Geophysics, Prospecting - Other | ||
| 090183 | 1977 | Geochemistry, Geology, and Radiometric Survey on the TING, NOTING, and PROSPECTING Claims | Gamma-Ray Spectrometry - Airborne Geophysics, Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Water - Geochemistry, Bedrock Mapping - Geology, Gamma-ray Spectrometry - Ground Geophysics, Petrographic - Lab Work/Physical Studies, Prospecting - Other | ||
| 090184 | 1976 | Report on Geochemistry, Geology and Radiometric Survey on the NEBULOUS 1-33 Claims | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry, Water - Geochemistry, Gamma-ray Spectrometry - Ground Geophysics, Petrographic - Lab Work/Physical Studies |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC006891 | Fig. U-TS2 - Geochemistry map - Tombstone area - Ukon joint venture | Geochemical Map | |
| ARMC006890 | Fig. U-TS1 - Radiometrics map - Tombstone area - Ukon joint venture | Geophysical Map |
| Citations |
|---|
