King River Resources Advances Mindoolah with Digital Mapping and Drilling Plans

Mindoolah Acquisition Unlocks High-Grade Gold Potential

King River Resources Ltd (ASX:KRR) has taken a decisive step this quarter by completing the acquisition of the Mindoolah Gold Project, a historically high-grade asset in Western Australia’s prolific Murchison Province. Historic production at Mindoolah averaged an impressive 19.02 grams per tonne (g/t) gold, but previous mining was limited to approximately 21 metres depth due to the water table, leaving a significant volume of mineralisation untouched. This acquisition positions KRR to exploit what it describes as a “transformative” exploration opportunity.

Mindoolah’s geological setting is compelling. Situated within the Youanmi Terrane of the Archaean Yilgarn Craton, the project covers around 100 square kilometres of prospective greenstone lithologies, including a notable monzogranite intrusion believed to be the source of mineralising fluids. The company’s interpretation shifts focus from narrow, high-grade quartz reefs mined historically to a potentially larger, bulk-tonnage intrusive system, supported by a 1.6-kilometre magnetic high anomaly that KRR aims to test aggressively.

Cutting-Edge Exploration Techniques to Refine Targets

KRR is deploying a suite of advanced exploration technologies to unlock the project’s potential. This includes commissioning high-resolution LiDAR and photogrammetry surveys to construct a centimetre-scale “Digital Twin” of the terrain. This digital model enables virtual field mapping, allowing geologists to analyse subtle structural features obscured by vegetation and to identify alteration halos that may indicate gold mineralisation. The Digital Twin also enhances geotechnical safety by providing precise drill rig positioning relative to historic pit geometries.

Complementing this is a planned airborne magnetic survey using a helicopter platform, set for late April 2026. The survey’s fine 50-metre line spacing and terrain-following flight path aim to resolve complex subsurface structures, particularly by minimizing interference from nearby banded iron formations. This integration of surface and geophysical data is expected to sharpen drill targeting accuracy significantly.

These initiatives build on the company’s earlier announcements and are part of a deliberate strategy to move rapidly toward drilling. The comprehensive approach is detailed in the company’s recent high-tech exploration at Mindoolah, which highlighted the innovative use of digital mapping and geophysics to unlock the site’s potential.

Historic Drilling Confirms Untapped Mineralisation

Previous Reverse Circulation (RC) drilling at Mindoolah has identified multiple unmined high-grade intercepts below historical workings. Notable results include 4 metres at 9.3 g/t Au and 2 metres at 9.38 g/t Au at the Excelsior Prospect, as well as significant intercepts at Le Soleil and Bertram’s prospects. These findings underscore the potential for substantial mineralised zones remaining at depth and along strike.

Further, underground rock-chip sampling across multiple levels averaged 6.59 g/t Au, while trench sampling and recent surface stockpile assays have revealed grades up to 40.7 g/t Au, reinforcing the robustness of the mineral system. KRR’s forensic spatial reconciliation of historic mining data has precisely mapped these high-grade reefs and their cessation points, often at shallow depths or water table limits, indicating clear targets for deeper drilling.

The company’s strategic decision to exercise its option and acquire Mindoolah was driven by this evolving geological model, which posits the monzogranite intrusion as the primary conduit for mineralising fluids. Historic drill hole MP4, which ended prematurely at the water table but logged 47 metres of kaolinised granite with quartz veining, is viewed as a “near miss” that hints at a larger, depth-persistent mineralised system awaiting discovery.

Tennant Creek Soil Sampling Supports Further Exploration

While Mindoolah commands the spotlight, KRR’s Tennant Creek projects in the Northern Territory continue to advance. Ionic soil sampling programs across Langrenus, BIF Hill East, and EL31623 IOCG prospects have returned subtle but coherent multi-element anomalies that align with interpreted structural trends. These qualitative results, though requiring further validation, provide a pipeline of drill-ready targets for the company’s ongoing exploration efforts.

This work builds on previous exploration momentum in the region, including the identification of hydrothermal ironstones and promising IOCG-style mineralisation corridors, as reported in earlier new IOCG targets at Tennant Creek coverage.

Financial Position and Corporate Developments

King River Resources reported a cash balance of approximately AUD 1.48 million as of 31 March 2026, with no debt. The company funded the Mindoolah acquisition and exploration activities partly through the sale of 300,000 shares in Tivan Limited, a significant investment holding valued at over AUD 30 million. The board has approved further divestment of up to 10 million Tivan shares to bolster funding for upcoming exploration.

During the quarter, KRR also issued 64 million unquoted performance rights to employees under its incentive plan, while milestone conditions were met for 150 million performance rights granted to senior management and the managing director. These remain unexercised but represent potential future dilution.

Looking Ahead to Drilling and Target Generation

KRR’s immediate focus is on integrating the incoming high-resolution geophysical data with the Digital Twin and geological mapping to prioritise drill targets. Site preparation works have been completed to enable access for drilling rigs, and maiden air-core drilling is planned to test structural corridors and the margins of the monzogranite intrusion.

The company’s approach reflects a blend of modern technology and meticulous historical data analysis, aiming to “see through” cover and water table constraints that limited past mining. The upcoming drill program will be a critical test of the intrusive source model and the potential for a larger, bulk-tonnage gold system beneath Mindoolah’s historic high-grade reefs.