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Occurrence Details


Occurrence Number
115I 180
Occurrence Name
Porcupine
Occurrence Type
Hard-rock
Status
Showing


General Information

Secondary Commodities: gold
Deposit Type(s): Unknown
Location(s): 62.277170 N, -137.1606 W
NTS Mapsheet(s): 115I06
Location Comments: Coordinates provided by Triumph Gold in 2020.
Hand Samples Available at YGS: No

Capsule

Work History

B. Harris staked the Rick claims in 1985 as part of the Goldstar property. The Guder and Harris claims were optioned in 1986 by Chevron Minerals Ltd and 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 in 1991. 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. Redell Mining changed its name to FM Resources Corp. in 1998 and performed mechanical trenching at the Porcupine Zone in 1999.

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

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 Porcupine Zone.

Triumph Gold acquired Northern Freegold Resources in 2015 and the property that includes the Porcupine Zone is now termed 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.

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).

Mineralization & Results

The Porcupine Zone is a historical gold showing. Outcrop and trenching has exposed large blocks of unfoliated quartz monzonite wall rock crosscut by quartz feldspar porphyry dykes at the Porcupine Zone. The wall rock is cut by quartz veins ranging from 2 mm to 20 cm wide with a coxcomb texture and thin, dark chalcedony veinlets along the margins. Mineralization occurs as finely disseminated pyrite where the wall rock is soft and weathered (AR 094709).

Location Map

Last Updated: Feb 10, 2021

Work History

Year Work Type Comment
2006 Airborne Geophysics: Magnetic Property wide survey.
2006 Airborne Geophysics: VTEM Property wide survey.
2004 Geochemistry: Rock Grab samples.
2004 Geology: Bedrock Mapping
1999 Geochemistry: Rock
1999 Trenching: Mechanical

Regional Geology - Terrane

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Regional Geology - Bedrock

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Related References

Number Title Page(s) Document Type
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
094709 2004 and 2005 Assessment Report on the Goldstar and Glen Property Assessment Report
094141 Geochemical Survey and Trenching Program Completed at the Mt. Freegold Property Assessment Report
097175 Drilling and Geochemical Report on the Freegold Mountain Project Assessment Report
Citations

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