AUS
NZ
UK
CA
USA
IND
Highlights
- King River Resources is set to commence drilling at the Mindoolah Gold Project, with an RC drill rig scheduled to arrive on site this week.
- The company plans to investigate a 339,000-tonne reconciliation discrepancy linked to historical mining.
- The company will combine stockpile testing with first-pass drilling beneath priority historical workings.
- An aeromagnetic survey will support future target generation across the project.
King River Resources Ltd (ASX:KRR) has been gaining traction, with its shares rising 7.89% to AUD 0.041 in early trading on 22 June 2026. The latest gain follows an update highlighting preparations for a significant exploration campaign at the company’s Mindoolah Gold Project in Western Australia. With a reverse circulation (RC) drill rig mobilising to site, a substantial historical material discrepancy under investigation, and multiple high-priority prospects set for drilling, the project is entering an active phase that could provide fresh insights into both near-surface opportunities and deeper mineralised structures.
RC drilling campaign targets historical surface material
King River is set to begin RC drilling at the Mindoolah Mining Centre during this week. The program follows a 3D LiDAR volumetric assessment, which identified a discrepancy between historical production records and estimated excavated volumes across the project area, now interpreted to exceed 1.08 million tonnes. The difference includes a recently identified reconciliation gap of about 339,000 tonnes from historical mining activities.
Mining at Mindoolah during the mid-1980s focused mainly on shallow oxide mineralisation, with reported head grades averaging 19.02 g/t Au. The company believes mineralised material may remain within historical waste dumps and low-grade stockpiles. The current drilling campaign is designed to evaluate gold distribution, material variability and the potential significance of near-surface stockpiled material. A bulk density characterisation program is also underway to support tonnage estimation and future assessments.
Priority prospects undergo first-pass testing
The Phase 1 exploration program includes around 1,000 metres of RC drilling beneath the Excelsior, Cundy, Bertram’s and Mindoolah Main Reef prospects. The work aims to validate historical drilling data, confirm mineralisation styles and improve understanding of structural controls.
- At Excelsior, the company plans to investigate mineralisation beneath the historical open pit and assess lode geometry using different drill orientations.
- At Cundy, geological interpretation suggests previous work may not have fully tested the principal mineralised corridor.
- Bertram’s remains a priority structural target supported by historical high-grade sampling, while one RC hole is planned at Mindoolah Main Reef to test the interpreted mineralised position beneath historical underground workings.
Aeromagnetic survey to support future targeting
Alongside drilling activities, an aeromagnetic survey is scheduled to commence this month, with data acquisition and processing expected to continue into July. The survey results will be integrated with LiDAR mapping, historical drilling information and surface geochemistry to refine structural targets and identify possible extensions to known mineralised trends.
Initial assay results from the current drilling campaign are expected during August 2026, subject to drilling progress and sample processing timelines.
With drilling activities commencing, geophysical work progressing and multiple historical targets being revisited, King River Resources is advancing a parallel exploration strategy across the Mindoolah Gold Project. The combination of stockpile assessment, structural validation and high-resolution magnetic data is expected to contribute to ongoing geological interpretation and future drill targeting, with upcoming assay results and survey outcomes set to guide the next stages of exploration.
