Find publications, data and maps managed by the
Yukon Geological Survey

Occurrence Details

Occurrence Number
115I 172
Occurrence Name
Occurrence Type

General Information

Secondary Commodities: copper, gold
Aliases: Freegold
Deposit Type(s): Porphyry Cu-Mo-Au
Location(s): 62.290470 N, -137.1544 W
NTS Mapsheet(s): 115I06
Location Comments: Coordinates provided by Triumph Gold in 2020.
Hand Samples Available at YGS: No


Work History

The original discovery in the Mt. Freegold area was made by P.F. Guder in 1930 on the Augusta cl (15494), followed by discoveries on the adjoining Peerless, Gold Star and Margarete claims. Guder explored by hand pits and shallow shafts until 1959. Guder's claims (Gold Star group) were optioned in 1969 to Yukon Revenue Mines Ltd. and explored with bulldozer trenching and geological mapping. In 1973, Prism Resources Ltd. optioned the claims.

Prism transferred the option early in 1974 to Dynasty Exploration Ltd who carried out soil sampling. Guder's claims were optioned by Arctic Red Resources Corporation from 1980 to 1982, then transferred to Guder Mining Exploration Ltd. The Guder and Harris claims were optioned in 1986 by Chevron Minerals Ltd., which conducted a grid geochemical survey and bedrock mapping. The claims were optioned again in 1987 by Big Creek Joint Venture (Big Creek Resources Ltd and Rexford Minerals Ltd). The claims were transferred back to Harris in September 1989.

Gagan Gold Corporation optioned the property and explored with trenching and geochemistry in 1991. Harris performed hand pitting in 1993. Redell Mining Corporation optioned the Goldstar property from Harris and Associates in August 1994. In September 1995, Pauline cl (YB37987) and Goldstar cl 1-3 (YB37988) were transferred to B. Harris.

In 2004, Midnight Mines Ltd. carried out prospecting, rock geochemistry of grab samples and bedrock mapping at Cabin.

Northern Freegold Resources consolidated the claims in 2006 as part of their Golden Revenue property and performed a property wide VTEM and magnetic airborne survey, including the Cabin occurrence.

Triumph Gold acquired Northern Freegold Resources in 2015 and the property that includes the Cabin occurrence is now termed the Freegold Mountain Project. Triumph performed trenching (6 trenches, 579 m) and rock geochemistry at Cabin in 2018 and further trenching (6 trenches, 565 m) in 2019.

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.

The YTT basement rocks are cut by numerous plutonic and volcanic events from the Mesozoic (Murray & Friend, 2018), including:
1. Early Jurassic Long Lake monzonite to syenite plutonic suites;
2. Mid-Cretaceous Mount Nansen Suite andesite to diorite;
3. Mid-Cretaceous Whitehorse granodiorite, quartz monzonite and granite;
4. Late Cretaceous Casino quartz monzonite;
5. Late Cretaceous Prospector Mountain syenite; and,
6. Quartz feldspar and feldspar hornblende porphyry dykes and plugs.

The major structural feature in the area is the Big Creek Fault with steeply-dipping, northwest-trending dextral faults parallel to the more regional Tintina and Denali faults (AR 097175).

The area underlying the Cabin occurrence is dominated by quartz-hypidiomorphic and locally K-feldspar megacrystic granite to syenogranite intruded by up to 5 m wide quartz-feldspar porphyry dikes. All units are cut by thick bodies of dark grey quartz monzonite (AR 097397).

Mineralization & Results

Mineralization at the Cabin zone is characterized by disseminated pyrite and veinlets of quartz and pyrite. The veinlets less commonly become >0.5 cm and can contain chalcopyrite (AR 097397). A weak to moderate phyllic (quartz-sericite-pyrite) alteration that transitions into a quartz-chlorite-clay alteration is present in the granite to syenogranite host rocks (AR 097397).

An intensely weathered and leached felsic porphyry breccia was mapped in 1981 at the Cabin zone, which may belong to the late Cretaceous Prospector Mountain suite and a pronounced magnetic low signature is interpreted to represent a zone of magnetite destruction associated with the Cabin porphyry hydrothermal system (Paulter, 2006).

Assays of 16.5 g/t Au and 346 g/t Ag are reported from the Cabin vein; however, a 1991 trenching program by Gagan Gold revealed only very weak gold and silver results (AR 093019).

Two samples taken in 2006 (samples 390217, -18) from the Cabin breccia body returned 45 ppb and 1.23 g/t Au from similar silicified breccia material indicating the presence of significant gold and the difficulty in predicting grade--the latter sample contained sericite and slightly more pyrite (Paulter, 2006).

Location Map

Last Updated: Dec 23, 2020

Work History

Year Work Type Comment
2019 Geochemistry: Rock Chip sampling of trenches.
2019 Trenching: Mechanical Six trenches totaling 565 m.
2018 Geochemistry: Rock Chip sampling of trenches.
2018 Trenching: Mechanical Six trenches totaling 579 m.
2006 Airborne Geophysics: Magnetic Property wide survey.
2006 Airborne Geophysics: VTEM Property wide survey.
2004 Geochemistry: Rock Grab samples during prospecting.
2004 Geology: Bedrock Mapping
2004 Other: Prospecting
1993 Trenching: Hand Hand pitting.
1991 Geochemistry: Rock Chip sampling of trenches.
1991 Trenching: Mechanical
1986 Geochemistry: Soil
1986 Geology: Bedrock Mapping
1974 Geochemistry: Soil
1969 Geology: Bedrock Mapping
1969 Trenching: Mechanical

Regional Geology - Terrane


Regional Geology - Bedrock

Period Max:
Age Max: MA
Period Min:
Age Min: MA
Rock Major:
Rock Minor:
Geological Unit (1M):
Geological Unit (250K):

Related References

Number Title Page(s) Document Type
091896 Report on Geological Mapping and Geochemical and Geophysical Surveys Done on the Goldstar Property Assessment Report
097175 Drilling and Geochemical Report on the Freegold Mountain Project Assessment Report
093019 Rotary Percussion Drilling and Trenching Assessment Report on the Goldstar Property 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
092699 Trenching Program on the Goldstar Property Assessment Report
2018-2 Bedrock geological map of the Mount Freegold district, Dawson Range Open File (Geological - Bedrock)
094745 2006 Geophysical Assessment Report on the Freegold Mountain Property Assessment Report
096643 2013 Geological and Geochemical Report for the Freegold Mountain Property Assessment Report
094709 2004 and 2005 Assessment Report on the Goldstar and Glen Property Assessment Report
093189 Exploration Report on the Freegold Mountain Project Freegold Mountain Area Assessment Report
092127 Trenching, Geophysical and Diamond Drilling Program on the Goldstar Property Assessment Report
Paulter, J. (2006). Evaluation Report on the Freegold Project for Northern Freegold Resources. Available on SEDAR.
Triumph Gold Corp., Aug/2020. Assessment Report #097397 by J.R. Halle.
Triumph Gold Corp., MD&A 23 Apr/2019
Triumph Gold Corp., News Release: 16 Oct/2018

Submit Information to Yukon Geological Survey