Premier1 Lithium is set to begin its first-ever drilling campaign at the Rochefort Gold Prospect, targeting a substantial gold-in-soil anomaly near a producing deposit in Western Australia’s Murchison region.
- Maiden RC drilling program to test ~1,000m at Rochefort gold anomaly
- Large coherent gold-in-soil anomaly with peak values up to 42.9 ppb Au
- High-grade rock chips up to 11.7 g/t Au from quartz-hematite veins
- Strategic location 20 km north of Crown Prince deposit in underexplored belt
- Drilling designed from recent gravity and magnetic survey structural data
Maiden Drilling Targets Well-Defined Gold System
Premier1 Lithium Limited (ASX:PLC) is gearing up to drill its Rochefort Gold Prospect in Western Australia’s Murchison region, marking a key milestone with its maiden Reverse Circulation (RC) program scheduled to start late May 2026. The campaign will consist of up to five holes totaling approximately 1,000 metres, designed to test a robust gold-in-soil anomaly measuring roughly 400 by 350 metres, with surface assays revealing peak UltraFine™ gold values of 42.9 parts per billion (ppb). This drilling represents the first direct test of a target that Premier1 describes as having all the hallmarks of a gold mineralised system, including high-grade rock chips up to 11.7 grams per tonne (g/t) Au from quartz-hematite veins and a structurally complex setting confirmed by recent geophysical surveys.
Executive Director Simon Phillips highlighted Rochefort’s unique status as a modern discovery in a historically underexplored greenstone belt, contrasting it with other prospects that bear evidence of past workings. Rochefort’s location within the Abbotts Greenstone Belt, approximately 20 kilometres north of New Murchison Gold Ltd’s producing Crown Prince deposit, adds to its appeal as a rare opportunity in a proven gold district. The Crown Prince deposit itself boasts a mineral resource of 2.2 million tonnes at 3.9 g/t Au for 279,000 ounces, underscoring the potential scale of mineralisation in the region.
Structural Insights Shape Drilling Strategy
The drill program’s design leverages detailed interpretation of a high-resolution ground gravity survey completed in March 2026, combined with existing airborne magnetic data. These datasets have delineated a structurally favourable zone where multiple north-south trending faults intersect with a major northwest-striking geological contact, hosting mineralisation within highly fractionated and altered quartz dolerite units. The planned holes are oriented to intersect these north-south trending quartz-hematite vein systems at optimal angles, with collars positioned to provide cross-sectional coverage and step out along strike and dip to test extensions beneath shallow cover.
This approach builds on Premier1’s earlier geophysical work, including a precision gravity survey launched in March 2026, which refined the structural framework and accelerated drill targeting. The Rochefort anomaly’s large footprint and strong geochemical signature, combined with its structural complexity, offer clear scope for growth beyond the initial drill test. The company’s focus on systematic exploration in this underexplored belt contrasts with the limited historical activity, which was mostly confined to the nearby Abbotts Mining Centre and did not extend over Premier1’s current tenure.
Regional Context and Exploration Upside
Rochefort sits within the Abbotts North Project, located 35 kilometres north of Meekatharra along well-maintained transport routes. The project area lies within the northern Murchison Domain of the Yilgarn Craton, a world-class gold province known for its prolific greenstone belts. The Abbotts Greenstone Belt hosts historic high-grade gold production, including the Abbotts mining centre that yielded exceptional grades of 31 g/t Au from quartz reefs mined to shallow depths.
Premier1’s tenure covers largely unexplored ground adjacent to these historic deposits and the Crown Prince mine. Nearby, New Murchison Gold’s Lydia Prospect has delivered high-grade drill intercepts, with structural and lithological similarities to Rochefort, both featuring gold mineralisation hosted within fractionated dolerite units controlled by north-trending shear zones. While these analogues are encouraging, Premier1 cautions that such comparisons do not guarantee similar exploration outcomes.
Premier1’s maiden drilling at Rochefort follows a period of strategic investment and exploration activity, including a $2.17 million capital raise earlier in 2026 to fund expanded soil sampling, geophysics, and heritage surveys. This drilling campaign complements ongoing programs at other company assets, such as the 3,700-metre campaign recently launched at the Mt Kersey Gold Prospect within the Yalgoo Project, further demonstrating Premier1’s commitment to unlocking gold potential across Western Australia’s greenstone belts.
Bottom Line?
Premier1’s maiden drilling at Rochefort is a crucial test of a compelling gold target in a proven district, with results poised to clarify the prospect’s potential and shape the company’s exploration trajectory.
Questions in the middle?
- Will Rochefort’s maiden drilling confirm the continuity and grade of gold mineralisation suggested by surface sampling?
- How might Premier1 leverage structural insights from geophysics to expand the Rochefort anomaly beyond initial drill fences?
- What implications could Rochefort’s success have for exploration strategies across the underexplored Abbotts Greenstone Belt?