P.F. Guder staked Revenue Copper in 1950 on a copper showing he explored that year with a shallow shaft and adit. The property was optioned by Conwest Exploration Ltd, which carried out EM and resistivity surveys in 1951. Guder re-staked it as Revenue Copper cl 1-8 (67180) in September 1953 and tied on Addition cl 1-2 (68060) to the south in January 1954. The claims were subsequently optioned by Teck Exploration Company Ltd., which drilled 5 holes (427 m) in 1954. Guder tied on Addition cl 3-4 (74488) to the west in September 1959 and Addition cl 5 (75323) to the west and Homestake cl 1-2 (75321) to the south in September 1960. The claims were then optioned by the Meridian Syndicate (Canex Aerial Exploration Ltd., Noranda Exploration Company Ltd. and Homestake Mining Company), which drilled 3 holes (165 m) in 1964 and by General Enterprises Ltd in 1967. Between 1967 and 1968, 25 Inca, Revenue, Rev and Add claims were added to the fringes of the property. A new company, Yukon Revenue Mines Ltd., was formed in 1968 to develop the property and carried out bulldozer trenching, geochemical sampling, IP surveying and diamond drilling in 1968 and 1969.
Optioned in 1970 by Kaiser Resources Ltd. The property reverted to Yukon Revenue, which carried out work between 1974 and 1980. In 1983, the property was optioned to Shakwak Exploration Company Ltd., which carried out geochemical, magnetic and EM surveying later in the year and drilled 9 holes (625 m) in 1984.
Nordac Mining Corporation acquired Shakwak's interest in 1985 and carried out grid soil sampling and excavator trenching that year and in 1986. In 1987, Nordac changed its name to Big Creek Resources Ltd. and entered a joint venture with Rexford Minerals Ltd (Big Creek Joint Venture), which staked Subtract cl 2-3 (YA97442) in May 1987 and carried out machine trenching, VLF-EM and magnetometer surveying in 1987 and drilled 2 holes (295.6 m) in 1988. Big Creek purchased Rexford’s interest in 1989 and drilled 11 holes (1 018 m) in 1991.
Big Creek subsequently merged with Pacific Sentinel Gold and the claims were later sold to Amarc Resources Ltd., which returned them to Yukon Revenue in 1995. Yukon Revenue changed its name to YKR International Resources Ltd in 1996 and carried out magnetometer and VLF-EM surveying that year and in 1998.
In 1999, ATAC Resources Ltd. optioned the Revenue claims from YKR and tied on Nuc cl 1-7 (YC09279) to the north in February 1999. At the same time, ATAC purchased the adjoining Nucleus claims (MINFILE occurrence 115I 107) from the W4 Joint Venture consolidating a total of 151 claims in the area to form a single contiguous claim group, which they named the Golden Revenue property. Rock and soil sampling was carried out in 1999 with follow-up soil sampling in 2001.
The Golden Revenue property was further consolidated in 2006 by Northern Freegold Resources. Northern Freegold Resources performed a property wide VTEM and magnetic airborne survey in 2006. In 2010, Northern Freegold carried out diamond and RC drilling, rock and soil geochemistry and a TITAN IP survey. Further diamond drilling was carried out in 2011.
Triumph Gold acquired Northern Freegold Resources in 2015 and the property is now termed the Freegold Mountain Project. Triumph carried out soil geochemistry and IP and magnetic ground surveys in 2018.
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 D-1 occurrence is one of three historical quartz-carbonate veins identified in the western part of the Discovery zone encompassed within the Revenue deposit breccia (MINFILE occurrence 115I 042). The north-northeast trending vein was originally exposed in a trench and short adit, both of which have now collapsed, after massive chalcopyrite boulders were discovered. The vein reportedly assayed 15% Cu and 15.6 g/t Au over 5 m (Paulter, 2006). Gold mineralization in the D-1 vein is primarily associated with chalcopyrite, minor pyrite and marcasite and scheelite mineralization (AR 092131).
Vein D-1 has been tested by numerous drill holes, including four holes drilled by Teck in 1954 that intersected seams of chalcopyrite and pyrite under the original trench. Drilling in 1968 by Yukon Revenue intersected an interval of 11.7 g/t Au, 69 g/t Ag and 6.8% Cu over 1.2m in DR68-5. In 1969, hole DR69-1 was drilled from the same collar at a steeper angle and intersected pink-stained breccia containing blebs of chalcopyrite, pyrite and a fine-grained blue-black mineral. The mineralized interval assayed 5.49 g/t Au and 1.68% Cu over 1.4 m (AR 094102).
In 1999, ATAC collected three float samples from bulldozer piles to the north of the original showing that returned up to 31.3 g/t Au, 58 g/t Ag and 5.94% Cu from a weathered quartz-carbonate vein with a band of massive pyrite and chalcopyrite (AR 094102).