General Information
Secondary Commodities: uranium
Aliases: Myrna, No, Peggy, Snow, Ting
Deposit Type(s): Uranium
Location(s): 64.392780 N, -138.690830 W
NTS Mapsheet(s): 116B07
Location Comments: 1 Kilometres
Hand Samples Available at YGS: Yes
Capsule
Work History
Probably first staked as Myrna, Peggy, etc cl (13331) in Sep/20 by C. Fothergill, E.J. Corp & D.B. Cole, who filed annual trenching until 1927. Restaked as Snow cl (79083) in 1962 by Yukon Cons Gold Corp, which mapped in 1963, and as Ting & Noting cl (YA5027) in Jun/76 by Ukon JV (Chevron & Kerr Addison), which explored with geochem and radiometric surveys in 1976-77, rock trenching in 1977 and 14 holes (1687 m) in 1979.
Chevron added Stone cl (YB17233) to the west in Jun/88 and performed prospecting and hand trenching later in the year.
Capsule Geology
Uranium is associated with biotite and disseminated purple fluorite plus rare interstitial uraninite in a pseudoleucite tinguaite phase along the southern margin of the Cretaceous Tombstone syenite stock. Ukon JV subdivided the tinguiate into three types: euhedral, foliated and aphanitic. Minor pyrrhotite, pyrite and traces of molybdenite occur throughout the tinguaite. Higher grade mineralization consists of uraninite and purple fluorite filling fine fractures within irregular stockworks, and linear zones containing uraninite, fluorite and molybdenite. Yellow secondary uranium minerals coat near-surface fractures.
Olade and Goodfellow reported a background range of 1 to 282 ppm Th and 3 to 86 ppm U in the syenite and 55 to 125 ppm Th and 3 to 206 ppm U in the tinguaite, rising to as much as 10 000 ppm U near mineralized zones which grade 0.2 to 2% U3O8.
The drilling intersected better than 106 g/t U3O8 in bands 2 to 76 m thick. A number of narrow quartz veins cutting syenite adjacent to the tinguaite contain arsenopyrite, pyrite, chalcopyrite and sulphosalts with anomalous gold and silver values.
References
GEOLOGICAL SURVEY OF CANADA Bulletin 180.
GEOLOGICAL SURVEY OF CANADA Paper 77-1B, p. 37-45.
NORTHERN MINER, 24 Nov/77.
MINERAL INDUSTRY REPORT 1976, p. 140-141; 1977, p. 53; 1978, p. 29.
OLADE, M.A., AND GOODFELLOW, W.D., Jun/78. Development of lithochemical and hydrochemical methods of exploration for porphyry uranium, molybdenum and tungsten mineralization, Tombstone Batholith. Paper presented at the International Symposium on Exploration Geochemistry, Denver.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 292.
YUKON JOINT VENTURE, 1976. Assessment Report *#090183 by A.R. Archer and E.P. Onasick.
YUKON JOINT VENTURE, Jan/78. Assessment Report *#090273 by A.R. Archer.
YUKON JOINT VENTURE, Mar/79. Assessment Report *#090443 by A.R. Archer.
YUKON JOINT VENTURE, 1979. Assessment Report *#090561 by A.R. Archer.
YUKON JOINT VENTURE, Jan/89. Assessment Report *#092674 by W.D. Eaton.
Probably first staked as Myrna, Peggy, etc cl (13331) in Sep/20 by C. Fothergill, E.J. Corp & D.B. Cole, who filed annual trenching until 1927. Restaked as Snow cl (79083) in 1962 by Yukon Cons Gold Corp, which mapped in 1963, and as Ting & Noting cl (YA5027) in Jun/76 by Ukon JV (Chevron & Kerr Addison), which explored with geochem and radiometric surveys in 1976-77, rock trenching in 1977 and 14 holes (1687 m) in 1979.
Chevron added Stone cl (YB17233) to the west in Jun/88 and performed prospecting and hand trenching later in the year.
Capsule Geology
Uranium is associated with biotite and disseminated purple fluorite plus rare interstitial uraninite in a pseudoleucite tinguaite phase along the southern margin of the Cretaceous Tombstone syenite stock. Ukon JV subdivided the tinguiate into three types: euhedral, foliated and aphanitic. Minor pyrrhotite, pyrite and traces of molybdenite occur throughout the tinguaite. Higher grade mineralization consists of uraninite and purple fluorite filling fine fractures within irregular stockworks, and linear zones containing uraninite, fluorite and molybdenite. Yellow secondary uranium minerals coat near-surface fractures.
Olade and Goodfellow reported a background range of 1 to 282 ppm Th and 3 to 86 ppm U in the syenite and 55 to 125 ppm Th and 3 to 206 ppm U in the tinguaite, rising to as much as 10 000 ppm U near mineralized zones which grade 0.2 to 2% U3O8.
The drilling intersected better than 106 g/t U3O8 in bands 2 to 76 m thick. A number of narrow quartz veins cutting syenite adjacent to the tinguaite contain arsenopyrite, pyrite, chalcopyrite and sulphosalts with anomalous gold and silver values.
References
GEOLOGICAL SURVEY OF CANADA Bulletin 180.
GEOLOGICAL SURVEY OF CANADA Paper 77-1B, p. 37-45.
NORTHERN MINER, 24 Nov/77.
MINERAL INDUSTRY REPORT 1976, p. 140-141; 1977, p. 53; 1978, p. 29.
OLADE, M.A., AND GOODFELLOW, W.D., Jun/78. Development of lithochemical and hydrochemical methods of exploration for porphyry uranium, molybdenum and tungsten mineralization, Tombstone Batholith. Paper presented at the International Symposium on Exploration Geochemistry, Denver.
YUKON GEOLOGY AND EXPLORATION 1979-80, p. 292.
YUKON JOINT VENTURE, 1976. Assessment Report *#090183 by A.R. Archer and E.P. Onasick.
YUKON JOINT VENTURE, Jan/78. Assessment Report *#090273 by A.R. Archer.
YUKON JOINT VENTURE, Mar/79. Assessment Report *#090443 by A.R. Archer.
YUKON JOINT VENTURE, 1979. Assessment Report *#090561 by A.R. Archer.
YUKON JOINT VENTURE, Jan/89. Assessment Report *#092674 by W.D. Eaton.
Location Map
Last Updated: Jun 27, 2018
Work History
| Year | Work Type | Comment |
|---|---|---|
| 1988 | Other: Prospecting | |
| 1988 | Trenching: Hand | |
| 1979 | Drilling: Diamond | Sixteen holes, 1,774 m. |
| 1977 | Ground Geophysics: Radiometric Survey | |
| 1977 | Trenching: Hand | |
| 1976 | Geochemistry: Silt | |
| 1976 | Geochemistry: Soil | |
| 1976 | Geochemistry: Water | |
| 1976 | Ground Geophysics: Radiometric Survey | |
| 1976 | Other | |
| 1963 | Geology: Bedrock Mapping | |
| 1920 | Trenching: Hand | Carried out 1920 - 1927. |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - basinal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite: Tombstone
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 94 MA
Period Min: Cretaceous
Age Min: 90 MA
Rock Major: syenite
Rock Minor: monzogranite
Reference: Thompson et al. (1994) - GSC OF 2849
Geological Unit (1M): mKT
Geological Unit (250K): mKyT
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 092674 | 1988 | Prospecting and Hand Trenching at the TOMBSTONE Property | Rock - Geochemistry, Soil - Geochemistry, Gamma-ray Spectrometry - Ground Geophysics, Prospecting - Other, Data Compilation - Pre-existing Data, Hand - Trenching | ||
| 061932 | 1978 | Reconnaissance Yukon [on the] TETA, BETA, JUG and ABBA Claims | Rock - Geochemistry, Bulk Sample - Lab Work/Physical Studies, Handblast - Trenching | ||
| 062003 | 1977 | [1977 Reconnaissance Work on the TETA and BETA Claims] | Rock - Geochemistry, Detailed Bedrock Mapping - Geology, EM - Ground Geophysics, Gamma-ray Spectrometry - Ground Geophysics, Magnetics - Ground Geophysics, Cursory Property Visit - 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 | ||
| 019458 | 1962 | [1962 Work on SNOW Claim and Galena Farm and Melville Crown Grants] | Rock - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other, Research/Summarize - Pre-existing Data |
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 |
|---|
