General Information
Secondary Commodities: zinc, lead
Deposit Type(s): Sediment hosted Mississippi Valley-Type Pb-Zn (MVT)
Location(s): 65.306940 N, -138.67 W
NTS Mapsheet(s): 116G07
Location Comments: .5 Kilometres
Hand Samples Available at YGS: No
Capsule
Work History
Staked as Ralph cl 1-4 (Y90119) in Aug/74 by Dynasty Explorations Ltd on the basis of geochemical silt sampling and preliminary prospecting carried out earlier in the year. In Sep/74 the company carried out detailed prospecting, geochemical soil sampling, hand trenching and rock sampling on the claims.
Restaked as Bou cl 1-4 (YC19930) in Apr/2000 by S. Ryan who carried out prospecting and limited geochemical soil sampling later that year.
Capsule Geology
Secondary iron, zinc and lead minerals principally forming limonite occur as gossanous float trains and subcroppings along a north-northeast trending ridge crest underlayen by Upper Cambrian to Lower Devonian dolostone. Soil samples collected parallel to the strike of the ridge, on the gossanous zone, returned 46 to 18 500 ppm Pb with 60 to 14 800 ppm Zn. Trenching and chip sampling of the most intensely gossanous part of the zone returned 0.09 % Pb with 3.18 % Zn and 0.06 % Pb with 2.74 % Zn over two continuous 3.05 m sections composed of massive slabs of limonite. No primary sulfide mineralization was exposed.
Resampling in 2000 served to confirm the anomalous nature of the gossanous zone and analysis of a wider suite elements revealed that the soils in this area were also anomalous in silver and cadmium (peak values of 6.2 ppm and 25.0 ppm, respectively). Prospecting along the ridge top failed to detect any extension of the previously delineated zone.
Staked as Ralph cl 1-4 (Y90119) in Aug/74 by Dynasty Explorations Ltd on the basis of geochemical silt sampling and preliminary prospecting carried out earlier in the year. In Sep/74 the company carried out detailed prospecting, geochemical soil sampling, hand trenching and rock sampling on the claims.
Restaked as Bou cl 1-4 (YC19930) in Apr/2000 by S. Ryan who carried out prospecting and limited geochemical soil sampling later that year.
Capsule Geology
Secondary iron, zinc and lead minerals principally forming limonite occur as gossanous float trains and subcroppings along a north-northeast trending ridge crest underlayen by Upper Cambrian to Lower Devonian dolostone. Soil samples collected parallel to the strike of the ridge, on the gossanous zone, returned 46 to 18 500 ppm Pb with 60 to 14 800 ppm Zn. Trenching and chip sampling of the most intensely gossanous part of the zone returned 0.09 % Pb with 3.18 % Zn and 0.06 % Pb with 2.74 % Zn over two continuous 3.05 m sections composed of massive slabs of limonite. No primary sulfide mineralization was exposed.
Resampling in 2000 served to confirm the anomalous nature of the gossanous zone and analysis of a wider suite elements revealed that the soils in this area were also anomalous in silver and cadmium (peak values of 6.2 ppm and 25.0 ppm, respectively). Prospecting along the ridge top failed to detect any extension of the previously delineated zone.
Location Map
Last Updated: Mar 30, 2017
Work History
| Year | Work Type | Comment |
|---|---|---|
| 2000 | Geochemistry: Soil | |
| 2000 | Other | |
| 1974 | Geochemistry: Rock | |
| 1974 | Geochemistry: Soil | |
| 1974 | Other | |
| 1974 | Trenching: Hand |
Regional Geology - Terrane
Group: Ancestral North America
Affinity: W Laurentia
Name: North America - platformal strata
Realm: Laurentia
Regional Geology - Bedrock
Supergroup:
Group/Suite:
Formation: Bouvette
Member:
Terrane: Laurentia
Period Max: Cambrian
Age Max: 500 MA
Period Min: Devonian
Age Min: 392 MA
Rock Major: dolostone
Rock Minor: shale/limestone/conglo
Reference: Norris (1982) - GSC Map 1526A
Geological Unit (1M): CDB
Geological Unit (250K): CDB1
Assessment Reports that overlap occurrence
| Report Number | Year | Title | Worktypes | Holes Drilled | Meters Drilled |
|---|---|---|---|---|---|
| 061217 | 1974 | Geochemical and Geological Report-1974 Field Work-RALPH Claim Group | Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Prospecting - Other, Hand - Trenching |
Related References
| Number | Title | Page(s) | Document Type |
|---|---|---|---|
| ARMC016797 | Geochemical map - 116G/7 | Geochemical Map | |
| ARMC011313 | Geochemistry map - Ralph group | Geochemical Map | |
| 2003-9(D) | Yukon Digital Geology (version 2) | Open File (Geological - Bedrock) |
| Citations |
|---|
| Norris, D.K. (ed), 1997. The geology, mineral and hydrocarbon potential of northern Yukon Territory and northwestern District of Mackenzie. Geological Survey of Canada, Bulletin 422. |
