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Occurrence Details


Occurrence Number
115I 051
Occurrence Name
Castle
Occurrence Type
Hard-rock
Status
Showing


General Information

Secondary Commodities: antimony, copper, zinc, lead, silver, gold
Aliases: Freegold
Deposit Type(s): Vein Cu+/-Ag Quartz
Location(s): 62.316720 N, -137.1465 W
NTS Mapsheet(s): 115I06
Location Comments: Coordinates provided by Triumph Gold in 2020.
Hand Samples Available at YGS: No

Capsule

Work History

Staked as Sun cl (Y41183) in December 1969 by Montana Mines Ltd., which performed geochemical sampling in 1970. Re-staked as Car cl (Y78678) in May 1974 by the Carmacks Syndicate (Castlemaine EL, Welcome North Mines Ltd, W.M. Bath Inv L, and Ventures West Capital L) and optioned to a joint venture between Western Mines Ltd., Cream Silver Mines Ltd. and Belmoral Mines Ltd., which conducted soil geochemistry and magnetic surveys later in the year.

Re-staked as part of the EYM (YA86872) group in 1985 by Chevron Canada Resources Ltd., which performed a soil geochemical survey later in the year. The EYM claims were sold to Big Creek Resources Ltd in spring, 1990. Archer, Cathro & Associates (1981) Ltd filed $6200 of rotary drilling on the EYM claims in March 1992.

Re-staked as Glen cl 1-40 (YB46680) by G. Harris in April 1994 who carried out prospecting and soil sampling. In early 1996, the claims were optioned to La Rock Mining Corp. which carried out soil sampling later in the year. In November 1996, B. Harris staked Castle cl 1-14 (YB96972) to the north.

Re-staked as Glen claims 11-20 (YC09190) by B. Harris in December 1998. The western portion of the original Glen claims was re-staked as Sey cl 1-20 (YC09221) by Archer Cathro & Associates (1981) Ltd in February 1999. B. Harris added Glen cl 1-4 (YC15335) in June 1999.

Northern Freegold Resources re-staked the Rage claims in 2006 and performed a property wide airborne magnetic and VTEM geophysical survey that included the Granger occurrence

Triumph Gold Corp. acquired Northern Freegold Resources in 2015 and the Granger occurrence is currently part of the Freegold Mountain Project.

Regional & Property Geology

The occurrence is partly underlain by Yukon-Tanana Terrane (YTT). The rocks of the YTT in this region consist of Early Mississippian metamorphic rocks separated into meta-sedimentary and meta-igneous suites. The meta-sedimentary suite consists of micaceous quartz-feldspar gneiss, schist and quartzite. The meta-igneous package is comprised of biotite-hornblende feldspar gneiss and coarse-grained granodiorite orthogneiss with lesser amphibolite (Allan & Friend, 2018).

The YTT basement rocks are cut by numerous plutonic and volcanic events from the Mesozoic (Allan & Friend, 2018; AR 090087), including:
1. Early Jurassic Long Lake monzonite;
2. Mid-Cretaceous quartz feldspar and feldspar hornblende porphyry dykes and plugs;
3. Mid-Cretaceous Whitehorse quartz monzonite and granite; and,
4. Late Cretaceous Casino quartz monzonite.

The Castle occurrence is located north of the Big Creek Fault near the contact between Paleozoic metagranodiorite and Early Jurassic Long Lake monzonite intruded by Mid-Cretaceous quartz-feldspar and feldspar hornblende porphyry dykes (AR 093528; Friend et al., 2018). Narrow bands of skarn outcrop as rusty black foliated rock in granitic rocks (AR 093528).

Mineralization & Results

The 1974 program outlined a zone of kaolinization and silicification in granodiorite, surrounded by a halo of quartz veining containing pyrite and minor chalcopyrite (AR 061473). In 1985, sampling outlined coincident but erratic gold-copper anomalies.

The best of ten rocks samples collected from the Castle occurrence in 1985 assayed 1,164 ppb Au, 1,643 ppm Cu, 5,470 ppm Pb, 762 ppm Zn, 724 ppm As, 804 ppm Sb and > 50.0 ppm Ag. Soil sampling alongside the access road produced several anomalous samples with the best returning 574 ppb Au, 197 ppm Cu, 161 ppm Pb, 675 ppm Zn, 2,040 ppm As, 17 ppm Sb and 3.0 ppm Ag (AR 091823).

La Rock Mining’s soil sampling program was designed to follow up the anomalous results obtained by Harris in 1994. Several patchy multi-element anomalies were returned.
 

Location Map

Last Updated: Dec 16, 2020

Work History

Year Work Type Comment
2006 Airborne Geophysics: Magnetic Property wide survey.
2006 Airborne Geophysics: VTEM Property wide survey.
1996 Geochemistry: Soil
1996 Geochemistry: Rock Grab samples.
1994 Geochemistry: Soil
1994 Other: Prospecting
1992 Drilling: RAB (Rotary Air Blast) Unknown amount of work. Archer Cathro filed for $6,200.00 of assessment credit.
1985 Geochemistry: Soil
1985 Geochemistry: Rock Grab samples.
1985 Geology: Bedrock Mapping
1974 Geochemistry: Soil Grid based.
1974 Ground Geophysics: Magnetics
1974 Geology: Bedrock Mapping
1970 Geochemistry: Soil

Regional Geology - Terrane

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


Regional Geology - Bedrock

Supergroup:
Group/Suite: Simpson Range
Formation:
Member:
Terrane: Yukon-Tanana
Period Max: Carboniferous
Age Max: 355 MA
Period Min: Carboniferous
Age Min: 345 MA
Rock Major: interm to felsic orthogneiss
Rock Minor:
Reference: Allan & Friend (2018) - YGS OF 2018-2
Geological Unit (1M): MSR
Geological Unit (250K): MgSR

Assessment Reports that overlap occurrence

Report Number Year Title Worktypes Holes Drilled Meters Drilled
094745 2006 2006 Geophysical Assessment Report on the Freegold Mountain Property Electromagnetic Airborne Geophysics, Magnetic Airborne Geophysics
091823 1985 Geological and Geochemical Report on the Stoddart Property Rock Geochemistry, Soil Geochemistry, Bedrock Mapping Geology
091804 1985 Geological and Geochemical Report on the NUCLEUS Property Rock Geochemistry, Soil Geochemistry, Bedrock Mapping Geology, Property Evaluation Other, Prospecting Other, Mechanical Trenching
061082 1974 Geological, Geophysical and Geochemical Report on the Car 1-40 Mineral Claim Freegold Mountain Area Soil Geochemistry, Bedrock Mapping Geology, Magnetics Ground Geophysics, Line Cutting Other
060200 1970 Report on the Geophysical and Geochemical Surveys Ram and Bow Claim Groups Electromagnetic Airborne Geophysics, Magnetic Airborne Geophysics, Rock Geochemistry, Soil Geochemistry

Related References

Number Title Page(s) Document Type
ARMC016627 Land and disposition and mineral deposits chart - Freegold - Big Creek area Geoscience Map (General)
ARMC016626 Geology and mineralization chart - Freegold - Big Creek area Geoscience Map (Geological - Bedrock)
091823 Geological and Geochemical Report on the Stoddart Property Assessment Report
093528 Exploration Report on the Glen,Castle,Rag, and Elephant Claims Assessment Report
093291 Exploration Report on the CARIBOO Property and GLEN Claims Assessment Report
061473 Geological, Geophysical and Geochemical Report on the Car 41-56 Mineral Claims Freegold Mountain Area Assessment Report
YEG2017_4 New contributions to the bedrock geology of the Mount Freegold district, Dawson Range, Yukon (NTS 115I/2, 6 and 7) Annual Report Paper
2018-2 Bedrock geological map of the Mount Freegold district, Dawson Range Open File (Geological - Bedrock)
1987-2(G) Geology of Mt. Nansen (115I/3) and Stoddart Creek (115I/6), Dawson Range, Central Yukon Open File (Geological - Bedrock)
Citations

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