LONDON (Alliance News) - Landore Resources Ltd on Monday said the preliminary assessment of metallurgical composites from the BAM East gold prospect within the Junior Lake property in Ontario, Canada, are "outstanding".
The test work show the combined gold recovery by gravity concentration followed by cyanidation leach extraction of the gravity wall tail averaged about 98% for both composites tested.
Drill core material in the form of two composites of 28 samples weighing a total of 67 kilogrammes was submitted to ALS Metallurgy for gravity concentration and cyanidation bottle roll leach testing on the gravity tails.
The preliminary assessment was designed to assess the metallurgical response of the mineralised samples from the BAM East Gold deposit and to provide a determination of the gold feed grade.
Landore said the leach gold extraction was 97% for composite one and 95% for composite two.
The calculated gold feed grade was 2.03 grammes of gold per tonne for composite one and 2.02 grammes per tonne for composite two, Landore said.
"Gold leach kinetics were fast, with most of the gold extraction taking place within the first six hours. Sodium cyanide and lime consumption averaged about 0.1 and 0.3 kilogrammes per tonne, respectively. Gold head grades were calculated at 2.0 grammes per tonne for both composites based on the combined gravity and cyanidation leach test results," said Landore.
Further gravity and cyanidation leach testing at coarser primary grind sizing has been recommended to determine whether similar gold recovery can be achieved with lower comminution energy requirements. Further testing of other zones within the deposit has also been recommended, the company said.
"These outstanding results, showing 98% recovery of gold using a simple combined gravity/leaching process, further supports our expectations that the exciting BAM East Gold deposit has the strong potential of low capital expenditure/operating expenditure costs amongst the lowest quartile of gold mining producers," said Chief Executive Bill Humphries.
Further metallurgical testing will now be undertaken and included in the pre-feasibility study for the project, which Landore expects to have completed by the third quarter of 2017.
Landore shares were trading up 7.1% to 3.56 pence per share on Monday morning.
By Joshua Warner; joshuawarner@alliancenews.com; @JoshAlliance
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Landore (LND)