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Occurrence Details


Occurrence Number
115I 055
Occurrence Name
Emmons Hill
Occurrence Type
Hard-rock
Status
Drilled Prospect


General Information

Secondary Commodities: antimony, silver, mercury, gold
Aliases: Freegold
Deposit Type(s): Epithermal Au-Ag-Cu: High Sulphidation
Location(s): 62.270030 N, -137.0516 W
NTS Mapsheet(s): 115I06
Location Comments: Coordinates provided by Triumph Gold in 2020.
Hand Samples Available at YGS: No

Capsule

Work History

Discovered by T. Bee and W. Renworth in the early 1930s and explored by hand trenching. In September 1936, American Yukon Mining Company Ltd sank a 28 m shaft from which two crosscuts (8 m and 15 m) were driven.

Re-staked as Bill, Joe and Tie cl (86804) in October 1964 by Peso Carmacks Gold Mines Ltd. and as 32 various Free cl (Y41182) in November 1969 by Tanzilla Exploration Ltd., which carried out geological mapping, access road construction, geochemical soil and stream sediment sampling and trenching in 1970.

Re-staked as GM cl 1-4 (Y77230) in September 1973 by M. Cloutier and sold to a private company, Mount Free Gold Mines Ltd. After a proposed merger with Frontier Exploration Ltd. fell through, the property was optioned to Norwich Resources Ltd., which added the Gold cl 1-36 (Y78108) in March 1974 and carried out line cutting and a small grid soil geochemical sampling program later in the year.

Re-staked as Dart cl 1-6 (YA23829) in October 1978 by Noranda Exploration Company Ltd., which carried out EM and IP geophysical surveying and geochemical sampling in 1979; drilling of 2 holes (94.2 m) in 1980; bulldozer trenching in 1981; hand trenching and geochemical rock and soil sampling in 1985; bulldozer trenching, sampling and mapping in 1986; drilling of 2 holes (184.5 m) in 1987; and reverse-circulation drilling of 12 holes (468 m) in 1988.

Re-staked as Dart cl 1-6 (YB55295) in November 1994 by T. Morgan. In August 1995, Morgan transferred the Dart claims to B. Harris. Midnight Mines Ltd (B. Harris) re-staked the occurrence as Dart cl 1-6 (YB67074) in June 1996 and carried out geochemical soil sampling in 2001. In 2004, Midnight Mines carried out rock geochemistry.

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 Emmons Hill occurrence. In 2013, Northern Freegold Resources performed mechanical trenching, as well as soil, rock and silt geochemistry at the Emmons Hill occurrence.

Triumph Gold acquired Northern Freegold Resources in 2015 and the property that includes the Emmons Hill occurrence 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 and granodiorite plutonic suites;
2. Mid-Cretaceous Mount Nansen Suite andesite to diorite;
3. Mid-Cretaceous Whitehorse granodiorite, quartz monzonite and monzodiorite;
4. Late Cretaceous Casino quartz monzonite;
5. Late Cretaceous Prospector Mountain syenite; and,
6. Quartz feldspar and feldspar hornblende porphyry dykes and plugs.

Mineralization & Results

Gold-bearing quartz sulphide veins and breccia zones with up to 10% pyrite, pyrrhotite, arsenopyrite, sphalerite, galena and stibnite are associated with quartz-feldspar porphyry dykes which intrude Late Devonian to Mississippian aged gneisses and schists of the YTT. The veins strike north-northeast and dips steeply east and are localized within a fault zone (AR 091785; AR 092631).

Geochemical surveys in 1970 outlined copper-antimony anomalies and a copper-molybdenum anomaly. Assays from the underground workings were erratic. Tanzilla reported samples grading up to 24.0 g/t Au, 5.5 g/t Ag and 3.6% Sb (AR 060608).

The 1980 drilling intersected up to 5 m of pyrrhotite with minor quartz, but poor gold values. Trenching attempted in 1981, 1985 and 1986 failed to reach bedrock. The 1985 soil sampling returned low values, but drilling in 1988 produced elevated values adjacent to the old shaft with assays of 100 to 1,000 ppb Au and elevated arsenic returned over widths up to 9 m (AR 091785).

Midnight Mines’ work in 2001 served to relocate old workings and confirm previous values and was carried out as part of a compilation report prepared for assessment on the Dart-Goldy property (this occurrence and MINFILE occurrence 115I 112).

Trenching in 2013 by Northern Freegold Resources observed moderate to intense clay alteration at the margins of the quartz feldspar porphyry dykes and in orange, friable brittle shear zones (AR 096643). Auriferous veins are present in the shear zones as discreet veins systems and fine-grained, disseminated pyrite and arsenopyrite, fine-grained stibnite and medium-grained galena and sphalerite mineralization are present in quartz-barite/-carbonate gangue. Chip sampling of the trenches returned assays of up to 0.03 g/t Au over 38.6 m and 0.16 g/t Ag over 4 m (AR 096643).

Location Map

Last Updated: Dec 16, 2020

Work History

Year Work Type Comment
2013 Geochemistry: Rock Chip and grab samples.
2013 Geochemistry: Silt
2013 Geochemistry: Soil
2013 Trenching: Mechanical
2006 Airborne Geophysics: Magnetic Property wide survey.
2006 Airborne Geophysics: VTEM Property wide survey.
2004 Geochemistry: Rock
2001 Geochemistry: Soil
2001 Other: Prospecting
1988 Drilling: Rotary Twelve holes, 468 m.
1987 Drilling: Diamond Two holes, 184.5 m.
1986 Geochemistry: Rock
1986 Geology: Bedrock Mapping
1986 Trenching: Mechanical
1985 Trenching: Hand
1985 Geochemistry: Rock
1985 Geochemistry: Soil
1981 Trenching: Mechanical
1980 Drilling: Diamond Two holes, 94 m.
1979 Geochemistry: Soil
1979 Ground Geophysics: EM Also IP survey.
1974 Geochemistry: Soil
1974 Other: Line Cutting
1970 Geochemistry: Soil Also silt sampling.
1970 Geology: Bedrock Mapping
1970 Trenching
1936 Development, Underground: Shaft Development 28 m shaft and 23 m of crosscut.
1935 Trenching: Hand

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
096643 2013 2013 Geological and Geochemical Report for the Freegold Mountain Property Reclamation Development, Surface, Rock Geochemistry, Silt Geochemistry, Soil Geochemistry, Bedrock Mapping Geology, Petrographic Lab Work/Physical Studies, Data Compilation Pre-existing Data, Backhoe Trenching, Hand Trenching
094745 2006 2006 Geophysical Assessment Report on the Freegold Mountain Property Electromagnetic Airborne Geophysics, Magnetic Airborne Geophysics
094555 2004 Geological and Geochemical Assessment Report on the Goldy Property Rock Geochemistry, Property Evaluation Other, Process/Interpret Pre-existing Data
092631 1988 Drilling Report on the Dart 1-6 Claims Rotary Drilling
091785 1986 Geology, Geochemistry, and Trenching Report 1985 on the Dart 1-6 Claims Rock Geochemistry, Soil Geochemistry, Hand Trenching
090533 1979 Geophysical Assessment Report Dart 1-6 Mineral Claims EM Ground Geophysics, IP Ground Geophysics
061045 1974 GM- Gold Corp Report by P.H. Sevensma Data Compilation Pre-existing Data, Research/Summarize Pre-existing Data
060608 1970 Reconnaissance Geology and Geochemistry Free Mineral Claims, Freegold Mountain Area All Weather Road Development, Surface, Silt Geochemistry, Soil Geochemistry, Bedrock Mapping Geology, Property Evaluation 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)
092631 Drilling Report on the Dart 1-6 Claims Assessment Report
1987-2(G) Geology of Mt. Nansen (115I/3) and Stoddart Creek (115I/6), Dawson Range, Central Yukon Open File (Geological - Bedrock)
090533 Geophysical Assessment Report Dart 1-6 Mineral Claims Assessment Report
096643 2013 Geological and Geochemical Report for the Freegold Mountain Property Assessment Report
094555 Geological and Geochemical Assessment Report on the Goldy Property Assessment Report
061045 GM- Gold Corp Report by P.H. Sevensma Assessment Report
1987McInnes Geological and precious metal evolution at Freegold Mountain, Dawson Range, Yukon MSc Thesis
094293 2000 Assessment and Compilation Report on the Dart-Goldy Property Assessment Report
091785 Geology, Geochemistry, and Trenching Report 1985 on the Dart 1-6 Claims Assessment Report
2018-2 Bedrock geological map of the Mount Freegold district, Dawson Range Open File (Geological - Bedrock)
060608 Reconnaissance Geology and Geochemistry Free Mineral Claims, Freegold Mountain Area Assessment Report
094745 2006 Geophysical Assessment Report on the Freegold Mountain Property Assessment Report
Citations

Drill Core at YGS Core Library

Number Property Year Drilled Core Size Photos Data
FGY-87-1 Dart 1987 NQ 0 0
FGY-87-2 Dart 1987 NQ 0 0
DDH-1 Dart 1980 BQ 4 0
DDH-2 Dart 1980 BQ 2 0

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