Great Dirt Resources Ltd (ASX:GR8) has announced its active pursuit of an expansive exploration program at the Doherty Project, nestled in the New England Orogen, NSW, aimed at unraveling the yet untapped manganese resources in the region.
Figure 1: Doherty Project, historical manganese workings and mineral occurrences
Ongoing Field Work and Surveys
Field crews at the Doherty Project are actively engaged in orientation geochemistry and community consultations, laying the groundwork for a thorough understanding of the geological landscape.
The Company has outlined its focus is on rock chip and orientation soil geochemistry, with the aim of identifying anomalous responses that could indicate potential manganese mineralisation. The systematic grided soil geochemistry that follows will further map the dispersion of manganese in the soil profile, providing insights into strike extensions away from historical mines.
Assisting in this endeavour is Michael Leu, a seasoned specialist with twenty-seven years of local experience in the New England Orogen. His expertise will be instrumental in exploring the northern and southern strike extents of historical mines such as Doherty and Junior, as well as evaluating their relationship with other mineral occurrences in the vicinity.
The announcement follows the Company’s successful debut on the ASX through a lucrative IPO, generating $5 million by issuing 25,000,000 shares at an issue price of $0.20 per share.
Historical Significance of Doherty and Junior Mines
The Doherty Mine, which operated from 1940 to 1960, produced 6,000 tonnes of battery (74.3%) and metallurgical (46%) grade manganese oxide. Despite mining cessation due to market conditions, mineralisation remains in place, offering significant potential.
North Neranghi, representing the northern extension of the Doherty Mine, will be a key focus, along with recorded mineral occurrences to the south.
The Junior Mine, which yielded 3,000 tonnes of mostly metallurgical-grade manganese, presents intriguing prospects. Geochemical testing of the northern and southern extents of ore zones will be conducted, with special attention to the Neranghi manganese occurrence.
Additionally, unmined deposits further south will be investigated, with ore from this area previously assaying at 50% Maganese.
Daileys Deposit and Petrological Studies
The investigation extends to Daileys Deposit, potentially the far northern extension of the Junior Mine sequence.
Petrological samples will undergo in-depth analysis by Dr. Paul Ashley, bringing over 40 years of experience in the mineralisation of the New England Orogen. These studies aim to shed light on the historical formation of the deposits and their genetic setting.
Aerial Geophysical Survey by Thomson Aviation
Thomson Aviation Pty Ltd has been awarded a contract for an aerial geophysical survey scheduled to commence on November 24, 2023.
Expected to take approximately 4 days, this survey will incorporate magnetic and radiometric components, with the latter detecting and mapping natural radioactive emanations to offer valuable insights into geological reconnaissance.
Magnetic surveys, the most cost-effective tool for large-scale reconnaissance, will detect disturbances in the earth’s magnetic field caused by magnetised materials, aiding in the identification of potential mineral deposits.
Great Dirt Resources Managing Director Marty Helean commented on the exploration progress.
“It’s fantastic to be listed on the ASX and we thank all our shareholders for backing the team and our projects,” he said.
“We’re dedicated to tapping into the hidden potential of crucial minerals. Our ongoing fieldwork signals a fresh era of discovery, and the beginning of our exploration program is a major milestone in our journey. Keep an eye out for exciting updates as we reveal the results of our exploration in the weeks to come!”
GR8’s Australian Stock Exchange-listed share price is currently trading at $0.23 (11.00am UTC+ 8 hours).