LONDON — Premier African Minerals last Friday said it has achieved mixed results from further drilling at RHA Tungsten and plans a simple gravity separation process route for development of the site.
The natural resource company with mineral projects in Africa said its Lode 2A mineralised zone at the RHA Tungsten project in Zimbabwe was intersected in boreholes DD15 and DD16, but its borehole DD17 did not intersect the mineralised zone and DD18 intersected mineralisation that has been interpreted as the overlapping footwall veins.
Premier African said it believes the DD17 borehole was not drilled deep enough to intersect the region.
The company said its best drill assay results for the holes, included a 0,31 metre space in the DD15 well at 46,8 kilogrammes per tonne of tungsten trioxide.
Based on a mineralogical report commissioned in January, the company has confirmed that the predominant tungstate mineral on site is Wolframite and that getting the mineral out of the ore can be completed through a fairly coarse grind.
Premier African Minerals said it now plans to use a simple and cost effective gravity separation process to recover the tungsten minerals for the RHA Tungsten site.
The company said the sample head grade of the mineralogical sample used was 1,52% tungsten trioxide and further metallurgical testwork is expected to be complete in roughly 14 days.
Premier African Minerals shares were down 8,8% to 0,661 pence last Friday.
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The London AIM market-listed natural resources company revealed the discovery of two “well mineralised” tungsten veins in February this year, and last Monday said it planned to start low-cost mining activities at the site in late 2014. —London South East/The Source
