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THE JOURNAL - AN OFFICIAL PUBLICATION BY THE ALASKA MINERS ASSOCIATION
SEPTEMBER 2025 | WWW.ALASKAMINERS.ORG
U.S. GoldMining Continues to Explore Whistler Pipeline NORTH OF 60 MINING NEWS
drill targets, likely for drill testing in 2026. The scout drilling program began at Whistler Orbit, a three-by-three mile area encompassing the Whistler and Raintree deposits, along with mul- tiple porphyry copper-gold targets with similar geophysical signatures. U.S. GoldMining began this top-of- bedrock scout drilling at the Big White porphyry prospect north of the Whis- tler deposit and plans to test several other targets within the Whistler Orbit. While scout drilling is testing the bedrock at blind geophysical targets within Whistler Orbit, geologists are conducting mapping and sampling at Muddy Creek, an underexplored mineral system about eight miles (13 kilometers) south of Whistler Orbit that encompasses a large gold-in- soil geochemical anomaly indicative of a significant intrusion-related gold system.
Previous rock chip sampling at Muddy Creek returned 73 samples of greater than 1 g/t gold, including 20 samples greater than 10 g/t gold, with the best sample coming in at 111.5 g/t gold. During this year's exploration, geol- ogists are focused on refining future drill targets at Muddy Creek by defining areas of higher-density quartz veining and developing geophysical pathfind- ers to stronger bedrock mineralization. While exploring the mine develop- ment and larger mineral potential at Whistler, U.S. GoldMining welcomed Sen. Lisa Murkowski, R-Alaska, to the project. Alaska's senior senator visited both the Whistler and Nova Minerals' Estelle exploration camps, both located alongside the Whiskey Bravo Airstrip in the West Susitna Mineral District. During her Aug. 21 tour, Murkowski was able to get a first-hand look at the Estelle antimony-gold and
Whistler copper-gold projects at the west end of the proposed West Susitna Road, which will extend 100 miles west from Alaska's road system near Port McKenzie to the Whiskey Bravo Airstrip on U.S. Gold- Mining's Whistler project. "It was exciting to share our vision for the advancement and contin- ued growth of Whistler, and we're delighted to have a potential advo- cate for Whistler and the broader West Susitna Mineral District in Washington D.C.," Smith said of the senator's visit. "As we advance our proposed PEA and execute on our 2025 exploration program, we remain committed to working col- laboratively with all levels of govern- ment, regulatory agencies, and other stakeholders in support of both the West Susitna Access Project and the long-term development of the Whistler project."
million tons of indicated resource averaging 0.41 g/t (3.72 million ounces) gold, 1.89 g/t (17.2 mil- lion ounces) silver, and 0.16% (999 million pounds) copper; plus 18.2 million metric tons of the inferred resource averaging 0.4 g/t (233,000 ounces) gold, 1.75 g/t (1 million ounces) silver; and 0.13% (54 million pounds) copper. While awaiting the PEA results, the company is carrying out an explora- tion program focused on evaluating some of the more than two dozen early-stage porphyry copper-gold and intrusive-related gold targets across the property. A central part of the reconnais- sance-level exploration program is the use of an auger drill to test the top of the bedrock to refine targets in areas of little or no outcrop. The objective of this drilling is to vector towards fertile porphyry intrusions and define future deeper follow-up
U .S GoldMining Inc. in late August provided an update on the 2025 exploration pro- gram at Whistler, which is focused on investigating the wider potential of the district-scale copper-gold project as the company awaits the results from a preliminary economic assessment (PEA) that will provide a first look at the economic and engi- neering parameters of developing a mine there. "As we work in parallel to advance the PEA over the existing mineral resources, the program will build upon the geological advances made in 2023 and 2024, with the objective of developing a pipeline of targets
for potential future discoveries that will underpin growth opportunities for the project," said U.S. GoldMining CEO Tim Smith. Located in the West Susitna Mineral District about 100 miles northwest of Anchorage, Whistler is a 53,700- acre land package that encom- passes three deposits — Whistler, Raintree West, and Island Mountain — that contain 7.2 million ounces of gold, 1.34 billion pounds of copper, and 30.4 million ounces of silver in all resource categories. In April, U.S. GoldMining initiated a PEA for establishing a mine at the Whistler deposit, which hosts 282.2
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