TRAILBREAKER Resources LTD
A NEW GOLD DISCOVERY IN BRITISH COLUMBIA’S LAST FRONTIER
The Willie Jack property covers 9,878 hectares and represents a grassroots exploration target, generated in-house by Trailbreaker’s exploration team. The property is situated in a remote part of northwestern British Columbia that has seen limited gold exploration to date. The area was briefly looked at in the early 1970s as a Copper Porphyry target with numerous Cu showings discovered but no assays for gold. Trailbreaker believes gold and silver were overlooked during the early 1970s exploration program at Willie Jack as the gold price was at historic record lows (<$250/oz, inflation-adjusted) during this time period.
The property covers a strongly anomalous regional geochemical Au-As-Sb signature hosted in a geological setting that shows potential for both porphyry and intrusion-related gold deposits. The property is situated at the headwaters of a historic placer gold-bearing creek and covers a Jurassic age granite pluton that intrudes Paleozoic sediments.
During the summer of 2020, Trailbreaker conducted a first pass, reconnaissance prospecting program to evaluate the property for its gold potential. The program was successful in discovering widespread gold mineralization across 6 kilometres with rock grab samples assaying up to 164 g/t (4.78 oz/ton) gold and soil samples assaying greater than 0.8 g/t gold. The widespread gold values obtained in the first pass program suggest the potential for district-scale mineralization in a previously unrecognized area of BC.
The Willie Jack property is located in the Atsutla mountain range in northwestern British Columbia, 70 km south of the Yukon-BC border and 130 km northwest of the community of Dease Lake, BC. The nearest road is the Alaska Highway, 65 km due north. The property is located in British Columbia’s last frontier; the remote and difficult access has deterred exploration to date despite being surrounded by significant gold deposits.
Placer gold discovered on Willie Jack Creek.
Government geologists conducted a reconnaissance geological mapping and prospecting program in the Atsulta mountain range and discovered abundant mineralized quartz veining with a single sample assaying 2.06 g/t Au and 72 g/t Ag.
Quebec Cartier Mining Company conducted a large regional scale (1800 sq km) stream sediment sampling program that discovered anomalous Cu draining the present-day Willie Jack property. The stream sediment samples were only analyzed for base metals (no gold).
El Paso Mining conducted a geological mapping and prospecting program in the area and identified widespread Cu mineralization hosted both in narrow quartz veins and fractured wall rock (granodiorite and monzonite).
Geological Survey of Canada completed a regional stream sediment sample program but with no analyses for gold, arsenic, or antimony. Dupont Canada Exploration followed up on anomalous tungsten and molybdenum stream sediment samples in the area with no gold assays done.
Geological Survey of Canada re-analyzed the 1979 stream sediment samples for multiple elements; including Au, As, and Sb. These 3 elements are strongly anomalous and spatially associated with the historic placer gold-bearing Willie Jack Creek that drains a portion of the property.
2000 – 2020
No documented exploration.
The Willie Jack property is located in the northwestern portion of the Atsutla mountain range within the Intermontane Belt. The property is situated along the regional scale, northwest-trending Teslin – Thibert strike-slip fault system that juxtaposes and divides the Cache Creek and Quesnel tectonic terranes. The Quesnel terrane hosts numerous Cu-Au porphyry deposits along the length of British Columbia; including Copper Mountain, Highland Valley, New Afton, Mount Polley, Mount Milligan, and Kemess. The property is also positioned at the southern fringe of the Tintina Gold Belt that hosts many intrusion-related gold deposits across Alaska and the Yukon. These deposits include Pogo and Fort Knox in Alaska and Brewery Creek and Dublin Gulch in the Yukon. The Willie Jack property covers a large Jurassic age pluton that intrudes Paleozoic sediments of the Kenda Formation and is cut by several small Cretaceous age intrusive stocks.
The claims cover a southwestern portion of the Jurassic age Christmas Creek pluton composed of diorite and monzonite that intrudes Paleozoic limestone and quartzite of the Kenda Formation. The pluton is affected by pervasive propylitic alteration with widespread narrow quartz veins containing Cu-Au mineralization. Several small, younger Cretaceous age granite stocks intrude the older Jurassic pluton throughout the property. The pluton is strongly fractured with abundant gossanous steeply dipping, northeast striking joint surfaces containing fine disseminated pyrite with a weak enrichment in gold and arsenic. There is abundant quartz veining hosted along the southern margin of the granite pluton that directly drains into the placer gold-bearing Willie Jack Creek.
A short, 7-day reconnaissance exploration program conducted during the summer of 2020 is the only known modern gold exploration to occur on the property to date. The prospecting and ridge-and-spur soil sampling program resulted in the collection of 185 soil samples and 94 rock grab samples. The program was successful in discovering widespread high-grade gold in rock grab samples over 6 kilometres with assays up to 164 g/t Au and 257 g/t Ag. The mineralization discovered to date shares characteristics of both Cu-Au porphyry and intrusion-related gold deposits.
A few different styles of mineralization occur at the Willie Jack property with the dominant style consisting of copper sulphides and oxides (chalcopyrite, malachite, bornite, azurite) and variable amounts of galena (lead sulphide) and pyrite in narrow, steeply dipping quartz veins hosted in the granodiorite pluton. These veins carry the highest gold and silver grades on the property. Bedrock samples of veining have returned assays up to 13.9 g/t Au, 52 g/t Ag, and 1.7% Cu.
The second style of mineralization is also hosted entirely in the granodiorite pluton and comprised of fractured gossanous zones containing abundant fine disseminated pyrite with weak enrichment in gold and arsenic. Prospecting grab samples from the gossanous zones have returned up to 0.54 g/t Au.
The third and final style of mineralization consists of auriferous quartz-arsenopyrite veins hosted in sediments near the granodiorite contact. First pass prospecting along the granite contact returned quartz veins assaying up to 0.51 g/t Au. Furthermore, first-pass ridge-and-spur soil sampling has outlined a robust, 4.5 km-long Au-Ag-As +/- Bi-Sb-Te soil geochemical anomaly that coincides with the granodiorite contact and auriferous quartz veins sampled to date. This soil anomaly contains gold values up to 0.8 g/t and silver values up to 1 g/t and remains open to the NW and SE along with the granodiorite contact. The geochemical signature of the soil anomaly suggests the potential for a gold skarn deposit and is believed to represent the lode source to the placer gold-bearing Willie Jack Creek directly downslope.
This gold skarn soil anomaly has seen no follow-up work to date and remains a high priority for the 2021 field season. Detailed prospecting in combination with systematic soil sampling will hopefully expand the anomaly and delineate drill targets for future programs.