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De Grey Mining’s drilling confirms high-grade lithium, caesium and tantalum at King Col

Published: 21:42 14 Nov 2018 EST

lithium
Follow-up drilling to extend the mineralisation is planned

De Grey Mining Ltd (ASX:DEG) has received positive lithium, caesium and tantalum results from the first two diamond holes drilled at the King Col Pegmatite prospect in Western Australia.

The King Col Pegmatite is 35 kilometres north of Pilbara Minerals’ (ASX:PLS) the world-class Pilgangoora Lithium-Tantalum Mine and 45 kilometres from the Wodgina Lithium Mine.

King Col location plan

The drilling was designed to confirm previous high-grades results and particularly to determine the distribution and percentages of lithium-bearing minerals.

De Grey’s diamond drilling has confirmed the previous results with the new holes returning:

• 11.5 metres at 0.64% lithium oxide from 27 metres; and
• 27.3 metres at 1.14% lithium oxide from 12.7 metres (including 11.9 metres at 2.43% lithium oxide).

King Col drill collar location plan

In addition to lithium, intercepts of anomalous caesium and high-grade tantalum were also returned from the holes, including:

• 0.9 metres at 1.26% caesium oxide from 30.6 metres;
• 1 metre at 1.63% caesium oxide from 21.5 metres;
• 4.3 metres at 675 ppm tantalum pentoxide from 34.2 metres; and
• 5.9 metres at 468 ppm tantalum pentoxide from 21.5 metres.

READ: De Grey Mining shares rise on further high-grade hits beneath Withnell gold deposit

Notably, the presence of spodumene, caesium, petalite, lepidolite, tantalum and pollucite clearly show that the King Col pegmatite system is fertile for lithium-caesium-tantalum (LCT) bearing minerals.

LCT pegmatites are typically zoned in both lateral and vertical orientations and further work is required to better understand this zonation and the potential scale of the LCT pegmatite.

Next steps

Future exploration activities at King Col are planned to include:

• Detailed assessment of mineralogy of the pegmatites including petrology is currently underway, with results expected shortly;
• Hylogger spectral scanning of drill core to determine mineralogy and distribution, to be undertaken by the Western Australia Geological Survey as part of EIS (Exploration Incentive Scheme) funding; and
• Follow-up drilling to extend LCT mineralisation.

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