Group 6 Metals has uncovered more volumes of ore tonnes and metric tonne units of tungsten trioxide from the Dolphin tungsten mine open pit up than originally anticipated, alongside a record month of shipments.
The company’s in-pit reconciliation methodology uses in-pit sampling, UV (ultraviolet light) lamping, and production drill hole assaying to compare mining results to the geological model.
When compared to the geological model, mining at the Dolphin mine open pit exceeded expectations of volume to be recovered up until the end of April.
Dolphin produced about 94 dry tonnes of concentrate in April at an average grade of 57.1 per cent for 5380 metric tonne units of tungsten trioxide. A total of 115.05 dry tonnes of concentrate at 57.38 per cent tungsten trioxide was shipped in April, a record month to date for Group 6.
“Over the past six months, our geology and mining teams have excelled at maximising ore recovery,” Group 6 managing director and chief executive officer Keith McKnight said.
“This means we’ve collected more valuable tungsten ore than forecast while working the outer areas of the Dolphin open pit. While this has caused a temporary delay in the mining sequence, the extra effort has resulted in a detailed understanding of the mine’s geology, giving us a lot of confidence in our mine forecast.
“Excitingly, the high-grade C-lens (deposit) is now accessible at -30 RL (reduced level) in the main Dolphin pit, and production drill assay results confirm the presence of high-grade ore in the mining blocks (is) scheduled for June.”
Group 6 has also made progress in sustainability. It, along with Climate Capital, has been looking into integrating a 7.5-megawatt solar panel array and a 5.5 megawatt hour battery storage system at the Dolphin mine’s power plant.
Climate Capital has finished power modelling and an extensive site assessment. If implemented, the solar power system would sit adjacent to Group 6’s process plant.
Group 6 and Climate Capital are expected to negotiate a power purchase agreement under a build own operate model to deliver the solar project.
After being closed for three decades, the Dolphin tungsten mine officially re-opened in August 2023. It is located near Grassy, a town on the south-east coast of King Island, an island in the Bass Strait between Victoria and Tasmania.
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