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Occurrence Details


Occurrence Number
105B 086
Occurrence Name
Cusp
Occurrence Type
Hard-rock
Status
Anomaly


General Information

Secondary Commodities: zinc, tungsten, tin
Deposit Type(s): Vein and Greisens Sn
Location(s): 60.213670 N, -131.650050 W
NTS Mapsheet(s): 105B04
Location Comments: .Based on location of soil anomaly in AR 090778
Hand Samples Available at YGS: Yes

Capsule

Work History
 
Staked as part of a large block of DU claims (1-239, YA28903) between June and Jul/78 by the Klinkit Joint Venture (DuPont of Canada Exploration Limited & Duval International Corporation). The DC Syndicate (Dome Mines Limited & Cominco Limited) tied on Zinc cl 1-16 (YA33021) to the west in Jun/78. The Zinc claims were staked to cover an area where silt sampling in 1976 had indicated anomalous tin values in three small creeks. In 1978, the property was explored with geological mapping and geochemical sampling. Soil sampling to the south took place in 1979. In 1981, a ground magnetic survey and soil and rock sampling occurred. The DuPont interest was transferred to CSA Minerals Inc in 1984 and to Goldsearch Inc in 1985. In 2006, the Seagull claims were staked over the occurrence. In 2012, widespread rock sampling across the Seagull Batholith took place, although none were taken at the occurrence. In 2014, an airborne magnetic and radiometric survey covered almost the entire Seagull Batholith. In 2018, the area was restaked as the JC 1-101 claims and an airborne magnetic and radiometric survey was flown over the property.
  
Capsule Geology
 
This occurrence lies within a belt of Yukon-Tanana Terrane rocks. This belt of rocks is part of an accreted island arc assemblage consisting of biomodal volcanics, coeval plutons and sedimentary rocks, as well as younger Jurassic intrusive rocks and overlap assemblages and Cretaceous intrusions. The occurrence is hosted in mid-Cretaceous Seagull Batholith quartz monzonite.
 
The occurrence is based on a cluster of tin-in-soil anomalies ranging up to 185 ppm Sn from sampling in 1978 and 1981.
 

Location Map

Last Updated: Jun 4, 2020

Work History

Year Work Type Comment
2018 Airborne Geophysics: Magnetic
2018 Airborne Geophysics: Radiometric
2014 Airborne Geophysics: Magnetic
2014 Airborne Geophysics: Radiometric
1981 Geochemistry: Rock
1981 Geochemistry: Soil
1981 Ground Geophysics: Magnetics
1979 Geochemistry: Soil soil sampling south of the occurrence
1979 Geology: Bedrock Mapping
1978 Geochemistry
1978 Geology: Bedrock Mapping

Regional Geology - Terrane

Group: Intermontane
Affinity: W Laurentia
Name: Yukon-Tanana
Realm: peri-Laurentian


Regional Geology - Bedrock

Supergroup:
Group/Suite: Seagull
Formation:
Member:
Terrane:
Period Max: Cretaceous
Age Max: 103 MA
Period Min: Cretaceous
Age Min: 94 MA
Rock Major: granite/granodiorite/monzonite
Rock Minor:
Reference: Roots et al. (2004) - GSC OF 4632; YGS OF 2004-1
Geological Unit (1M): mKS
Geological Unit (250K): mKqS

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
097201 2018 Memorandum Report of Exploration Work 2018 - Jaycee Tin Property Gamma-Ray Spectrometry - Airborne Geophysics, Magnetic - Airborne Geophysics, Rock - Geochemistry
096722 2014 STAKING, SOIL SAMPLING, PROSPECTING AND AIRBORNE GEOPHYSICS REPORT – SEAGULL TIN PROJECT Magnetic - Airborne Geophysics, Rock - Geochemistry, Soil - Geochemistry
096335 2012 Airborne Geochemical Sample Survey - Seagull Tin Project Silt - Geochemistry
094724 2006 Geochemical Report on the Seagull Property Rock - Geochemistry, Soil - Geochemistry
090778 1981 Geological Geochemical Geophysical Report Zinc 1-16 Claim Group Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology, Magnetics - Ground Geophysics
090457 1979 Geological, Geochemical Report on the Zinc 1-16 Mineral Claims Rock - Geochemistry, Soil - Geochemistry, Detailed Bedrock Mapping - Geology
090557 1979 Klinkit Joint Venture (Du Pont of Canada Exploration Limited with Dival Mining Limited) 1979 Programme, Yukon Territory Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Detailed Bedrock Mapping - Geology, Petrographic - Lab Work/Physical Studies, Prospecting - Other
090470 1978 Klinkit Joint Venture: 1978 Field Programme for Duval International Corporation and Du Pont of Canada Exploration Limited Rock - Geochemistry, Soil - Geochemistry, Bedrock Mapping - Geology, Geotechnical - Studies

Related References

Number Title Page(s) Document Type
2004-2 Bedrock Geology, Dorsey Lake (NTS 105B/4), southern Yukon (1:50,000 scale) Open File (Geological - Bedrock)
YEG1999_11 Wolf Lake project: Revision mapping of Dorsey Terrane assemblages in the upper Swift River area, southern Yukon and northern B.C. Annual Report Paper
Citations

Drill Core at YGS Core Library

Number Property Year Drilled Core Size Photos Data
DDH-80-K4 Cusp 1984 NQ 28 0
KL-84-1 Cusp 1984 BQ 4 0
KL-84-3 Cusp 1984 BQ 4 0
KL-84-4 Cusp 1984 BQ 6 0
KL-84-6 Cusp 1984 BQ 2 0
DDH-80-K5 Cusp 1980 NQ 18 0

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