Lefroy-Goldfields fast-track drilling near St Ives.

Drilling on Lake Lefroy.
Camera IconDrilling on Lake Lefroy. Credit: Lefroy Exploration

Lefroy Exploration and partner, Gold Fields Ltd, have upped the ante at their Lake Lefroy joint venture project, this week adding a second drill rig to the exploration program that is testing the ground adjacent to the world-class St Ives gold mine. The second rig will look to test some deeper targets generated by earlier exploration programs, with the drilling scheduled for completion in October 2020.

The Lake Lefroy gold project is located in the Eastern Goldfields of Western Australia, approximately 25 km east of the mining centre of Kambalda. Lefroy’s tenure in the region covers more than 370 square kilometres and is situated a mere 15 km north east of Gold Fields revered 10 million-ounce St Ives Gold Mine.

The company’s tenure adjoining the St Ives’ gold camp is covered by the Western Lefroy Joint Venture, or WLJV with Gold Fields Ltd, who has already completed its minimum $4 million expenditure commitment under the conditions of the farm-in agreement. Gold Field’s needs to fund a further $6 million of exploration before the 7th of June 2021 to earn its 51 per cent stake in the tenure.

The multi-national gold miner can then earn up to a maximum 70 per cent interest in Lefroy’s tenure by spending a total of $25 million over a 6-year period.

Gold Field’s kicked off its exploration program back in January of 2019, with a colossal 40,000m aircore drilling program which, following additional geophysical and geochemical surveying, has yielded six priority targets.

These targets include the LLT04, LLT06, LLT08 and Zanex prospects, in addition to two prospect areas on the Eastern Shoreline. These prospects are strung out over the surface of Lake Lefroy and cover an impressive 15km of strike.

Initial drilling of these targets has already returned encouraging results including 9m at 2.73 g/t gold from 32m at Zanex and 8m at 1.95 g/t gold from 94m at LLT06 – the current drilling program is designed to systematically test these targets at depth.

The addition of a second drill rig and the commencement of diamond drilling in Lake Lefroy to accelerate exploration is exciting news. The multiple large regolith gold anomalies over a prospective stratigraphic rock package in the vast area of Lake Lefroy requires the drill-based commitment and experience that Gold Fields can bring.

Lefroy Exploration Managing Director, Wade Johnson

The 9,000m reverse circulation, or ‘RC’ program will test each of the six prospects utilising one or more traverses of drilling to delve to more than 200 metres below surface in search of prospective gold mineralisation.

However, to accelerate the overall drilling program a diamond drill rig is now onsite complementing the work being done by the RC rig. The first cab off the rank for the diamond rig is the LLT08 prospect at the southern end of the Woolibar Fault, where a combination of geophysics and drilling has outlined a deeper gold target for testing. This first diamond hole is expected to plumb the LLT08 target at more than 400m depth.

The core from the diamond drilling across the six prospect areas is expected to provide a wealth of geological, structural and geochemical data for integration into the company’s databases and modelling for the Lake Lefroy area. This data will then be utilised to refine and develop the targets through Lefroy’s tenure.

Gold Fields’ interest in Lefroy’s comprehensive tenure comes from early geophysical and geochemical surveys by the company that ‘fingerprinted’ the rocks beneath Lake Lefroy. This work indicates that the stratigraphy below Lake Lefroy shows strong affinities with the geology that hosts the nearby St Ives Gold Mine.

Whilst it is still early days in the drilling program, the rapid mobilisation of the diamond rig to site supports the view that there might be more than just a glint of gold lurking below the surface at Lake Lefroy.

Is your ASX listed company doing something interesting? Contact: matt.birney@wanews.com.au

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