General Information
Secondary Commodities: copper, molybdenum, gold
Deposit Type(s): Porphyry Mo (Low F-Type)
Location(s): 62.236670 N, -137.416390 W
NTS Mapsheet(s): 115I03
Location Comments: 1 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Top cl 1-120 (Y58467) and Tri cl 1-98 (Y58587) in September 1970 by Kennco Explorations Ltd., which performed reconnaissance geochemical surveys and geological mapping in 1970 and grid soil sampling in 1971.
E. Curley staked Au cl 1-48 (YB58065) 3 km to the southwest in August 1995. In August 1996, Curley carried out a geochemical survey on the claims.
In 2011, YES Exploration Syndicate Inc. staked Top cl 1 to 234, which included the Tritop occurrence, and carried out soil sampling and prospecting in conjunction with Hawkeye Gold and Diamond Inc.
Regional & Property Geology
Outcrop is scarce in the vicinity of the occurrence. Float and felsenmeer encountered during Curley’s geochemical survey suggests that the area is underlain by mid-Cretaceous Casino Granodiorite and Mount Nansen Group volcanics. The Casino Granodiorite consists of biotite-hornblende granodiorite belonging to the Dawson Range Batholith and probably intrudes the Mount Nansen Group volcanics, which consist of mainly andesite to dacite flows, breccias and latite volcanics. A younger light salmon pink fine-grained feldspar porphyry unit is interpreted to cut the Mount Nansen Group volcanics.
Mineralization & Results
Soil sampling by Kennco outlined gold-molybdenum and copper molybdenum anomalies associated with volcanic and pyroclastic rocks of the Mt Nansen Group. Curley’s geochemical program collected 1 rock, 8 silt and 126 soil samples. Five soil samples returned Au values greater than 20 ppb (highest = 53 ppb Au). The lack of well-developed soil and the presence of permafrost is thought to have depressed Au values in the samples.
Soil sampling in 2011 by YES Exploration noted anomalous gold-in-soil values concentrated in an arc to the east, west and south of a central plutonic grandiorite knoll with up to 0.112 ppm Au. Elevated molybdenum (up to 18 ppm Mo), arsenic (up to 212 ppm As), and copper (up to 90 ppm Cu) were also noted in soils.
Prospecting in 2011 noted the granitoid rocks consisting of fine- to medium-grained feldspar porphyry and rhyolites with disseminated pyrite. A grab sample taken during prospecting returned 181 ppm Mo, 693 ppm As, 257 ppm Pb and 0.8 ppm Ag.
Staked as Top cl 1-120 (Y58467) and Tri cl 1-98 (Y58587) in September 1970 by Kennco Explorations Ltd., which performed reconnaissance geochemical surveys and geological mapping in 1970 and grid soil sampling in 1971.
E. Curley staked Au cl 1-48 (YB58065) 3 km to the southwest in August 1995. In August 1996, Curley carried out a geochemical survey on the claims.
In 2011, YES Exploration Syndicate Inc. staked Top cl 1 to 234, which included the Tritop occurrence, and carried out soil sampling and prospecting in conjunction with Hawkeye Gold and Diamond Inc.
Regional & Property Geology
Outcrop is scarce in the vicinity of the occurrence. Float and felsenmeer encountered during Curley’s geochemical survey suggests that the area is underlain by mid-Cretaceous Casino Granodiorite and Mount Nansen Group volcanics. The Casino Granodiorite consists of biotite-hornblende granodiorite belonging to the Dawson Range Batholith and probably intrudes the Mount Nansen Group volcanics, which consist of mainly andesite to dacite flows, breccias and latite volcanics. A younger light salmon pink fine-grained feldspar porphyry unit is interpreted to cut the Mount Nansen Group volcanics.
Mineralization & Results
Soil sampling by Kennco outlined gold-molybdenum and copper molybdenum anomalies associated with volcanic and pyroclastic rocks of the Mt Nansen Group. Curley’s geochemical program collected 1 rock, 8 silt and 126 soil samples. Five soil samples returned Au values greater than 20 ppb (highest = 53 ppb Au). The lack of well-developed soil and the presence of permafrost is thought to have depressed Au values in the samples.
Soil sampling in 2011 by YES Exploration noted anomalous gold-in-soil values concentrated in an arc to the east, west and south of a central plutonic grandiorite knoll with up to 0.112 ppm Au. Elevated molybdenum (up to 18 ppm Mo), arsenic (up to 212 ppm As), and copper (up to 90 ppm Cu) were also noted in soils.
Prospecting in 2011 noted the granitoid rocks consisting of fine- to medium-grained feldspar porphyry and rhyolites with disseminated pyrite. A grab sample taken during prospecting returned 181 ppm Mo, 693 ppm As, 257 ppm Pb and 0.8 ppm Ag.
Location Map
Last Updated: May 21, 2020
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2011 | Geochemistry: Soil | |
| 2011 | Other: Prospecting | |
| 1996 | Geochemistry: Soil | Curley soil sampled and prospected Au claims. |
| 1996 | Other: Prospecting | |
| 1971 | Geochemistry: Soil | |
| 1970 | Geology: Bedrock Mapping | |
| 1970 | Other |
Regional Geology - Terrane
Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian
Regional Geology - Bedrock
Supergroup:
Group/Suite: Mount Nansen
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 110 MA
Period Min: Cretaceous
Age Min: 90 MA
Rock Major: andesite/basalt/latite
Rock Minor: monzogabbro/diorite
Reference: Carlson (1987) - YGS OF 1987-2(G)
Geological Unit (1M): mKN
Geological Unit (250K): mKN
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 096052 | 2011 | Assessment Report on the Top Property | Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Prospecting - Other | ||
| 061105 | 1971 | Report Geochemical Investigations Tri and Top Claim Groups | Rock - Geochemistry, Silt - Geochemistry, Soil - Geochemistry |
