PLC Resources Eyes Larger Gold System as Rochefort Follow-Up Drilling Nears
Key Takeaways
- RC drilling at Rochefort is scheduled to commence 11 September 2026, with drill pads already prepared and no approval delays — environmental and heritage clearances are already held.
- The maiden 5-hole, 1,020m program returned anomalous gold up to 0.4 g/t Au in three of five holes, with four independent geological vectors all pointing northwest and at depth toward a larger untested system.
- Highly fractionated dolerite — the host rock for significant gold deposits across the Yilgarn Craton — has been confirmed in three of the five maiden holes, materially improving the geological credibility of the target.
- A newly interpreted regional syncline, entirely absent from existing GSWA mapping, adds over 8 km of strike on its eastern limb and over 6 km on its western limb within PLC tenure — a structural corridor that extends toward New Murchison Gold's Garden Gully Gold Project, which hosts a JORC Resource of 4.42 Mt @ 2.5 g/t Au for 359,300 oz Au.
- This is PLC's third drilling campaign in calendar year 2026, funded from existing cash reserves, with regional aircore drilling also advancing under received Programs of Work approvals.
Drill pads ready as PLC Resources prepares to test a larger gold system at Rochefort
Drill pads have been prepared at the Rochefort Gold Prospect, with follow-up RC (Reverse Circulation) drilling scheduled to commence on 11 September 2026. PLC Resources is targeting a potential larger gold mineralised system interpreted to lie beyond the margin of its maiden 5-hole, 1,020m RC program, which returned anomalous gold in three of five holes earlier this year.
This marks PLC’s third drilling campaign in calendar year 2026. Importantly, the program falls under environmental and heritage approvals already held by the company, meaning drilling can commence without delay upon rig mobilisation. The program is funded from existing cash reserves.
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Why the maiden program’s results point beyond themselves
The maiden program intersected anomalous gold of up to 0.4 g/t Au in three of five holes. The significance, however, lies not just in those values but in what the broader geochemistry reveals about where the real target may sit.
Four mutually reinforcing vectors have emerged from multi-element analysis of the maiden drilling:
- Host rock confirmed: Highly fractionated dolerite was intersected in holes 26ANRC001, 26ANRC002 and 26ANRC005, a rock type associated with a number of significant gold deposits across the Eastern Goldfields and broader Yilgarn region. Gold anomalism is associated with the most highly fractionated portion of the unit toward the base of 26ANRC005.
- Alteration and sulphidation strengthening: Increasing sodic (albite) alteration alongside magnesium depletion has been identified in the northern holes (26ANRC001, 26ANRC002 and 26ANRC005), accompanied by weak but consistent sulphide development interpreted as pyrrhotite — both processes commonly associated with gold deposition in dolerite-hosted systems.
- Pathfinder vectoring: Sulphur increases alongside gold while arsenic and antimony decrease, a trend interpreted as proximity to a gold source rather than a distal geochemical signature.
- Spatial trend: Gold values increase systematically toward the northwest and at depth within the most fractionated dolerite, across holes 26ANRC001, 26ANRC002 and 26ANRC003.
Taken together, these vectors suggest the maiden drilling clipped the edge of a mineralised system rather than an isolated anomaly. The follow-up program is designed to test what lies to the northwest and at depth.
What is fractionated dolerite and why does it matter for gold exploration?
Fractionated dolerite refers to a mafic igneous rock that has undergone progressive chemical differentiation as its parent magma cooled. This process, known as fractional crystallisation, produces rocks with distinctive chemical signatures — including elevated concentrations of elements and compounds that can be associated with gold-concentrating processes.
The investment relevance is straightforward: highly fractionated dolerite is the host rock for a number of significant gold deposits elsewhere in the Yilgarn Craton. Confirming this rock type at Rochefort materially improves the geological credibility of the target and provides a well-understood framework for interpreting the alteration and pathfinder trends identified in the maiden program.
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A second discovery opportunity emerges: the Abbotts North regional syncline corridor
Rochefort is one part of a larger picture at Abbotts North. Independently of the drilling results, PLC’s high-resolution airborne magnetic survey has revealed a large fold structure — interpreted as a syncline — along the eastern margin of the Abbotts Greenstone Belt. This geometry was entirely absent from existing GSWA (Geological Survey of Western Australia) regional geological mapping, making it a newly identified and entirely untested structural corridor of regional scale.
Key facts from the structural interpretation:
- Over 8 km of strike on the eastern limb of the syncline within PLC tenure
- Over 6 km of strike on the western limb
- The corridor extends along strike toward New Murchison Gold’s (ASX: NMG) Garden Gully Gold Project, which hosts a JORC Resource of 4.42 Mt @ 2.5 g/t Au for 359,300 oz Au, including the Crown Prince deposit at 228,400 oz Au (note: the proximity of this resource does not guarantee PLC will achieve similar results on its own tenements)
- A cross-cutting east-west structural corridor intersects the fold hinge, a setting recognised across the Yilgarn Craton as a first-order control on high-grade orogenic gold (gold formed by deep crustal fluid movement) mineralisation
- Fractionated dolerites are interpreted to have intruded the syncline, the same rock type confirmed in drilling at Rochefort
Figure 2 from the announcement illustrates these targets conceptually: PLC tenements are shown in yellow, NMG tenements in blue, with the interpreted syncline structure and cross-cutting east-west corridor both mapped within and adjacent to PLC’s tenure boundary.
Simon Phillips, Executive Director
“With drill pads now prepared at Rochefort, we’re ready to get the rig back out in September to test for a larger gold system. We’ve confirmed the right host rock – highly fractionated dolerite – and the alteration, sulphidation and pathfinder trends all strengthen to the northwest and at depth. Together, they point to the real possibility that we have drilled the edge of a larger gold system – and that is exactly what this next program is designed to test. It is a target we can get back to quickly, because our approvals are already in place.
Rochefort is only one part of the picture at Abbotts North. Combined with our newly interpreted regional syncline and structural corridor – which runs the length of our eastern tenure boundary and extends along strike toward New Murchison Gold’s Garden Gully Gold Project – we have multiple, complementary discovery opportunities to progress over the coming months.
The Company has a had busy exploration season, with this being the third drilling campaign in the calendar year. We are only one drill hole away from success and remain committed to putting as much shareholder money as we can into ground to test our very drill worthy targets.”
Next steps across both fronts
PLC has several near-term workstreams advancing in parallel at Abbotts North:
- RC drilling commences at Rochefort — 11 September 2026
- Detailed interpretation of airborne survey data, incorporating the syncline model and the newly identified cross-cutting structure, to refine drill targeting along the corridor
- On-ground geological reconnaissance and mapping to guide target prioritisation and confirm the appropriate sampling method (soil sampling versus direct aircore testing) across the corridor
- Regional aircore drilling program advancing, with Programs of Work approvals received and planning underway
The company has multiple complementary discovery opportunities in play at Abbotts North over the coming months, though it is important to note that there has been insufficient exploration to date to define a Mineral Resource at any of these targets, and it remains uncertain whether further exploration will result in a Mineral Resource determination.
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