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White Devil Project

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Australia

White Devil Project

Location: 35 km NW from Tennant Creek, Northern Territory, Australia

Project Contacts:

17 Brown Street
Tennant Creek
Northern Territory, Australia
0860

Contacts:

Additional Resources for Suppliers & Investors

Categories

Summary

Mine TypeOpen Pit & Underground
Study CompletedPreliminary Economic Assessment
Study in ProgressFeasibility
StagePermitting
Commodities
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level open stoping (SLOS)
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Mine Life... Lock
SnapshotThe White Devil Project represents an expansion opportunity for the Tennant Creek operations, providing a new high-grade ore source to supplement and extend production through the existing Tennant Mining infrastructure, including the Nobles CIL processing facility.The project forms part of a joint venture between Emmerson Resources Limited and Tennant Mining and has been confirmed as a Major Mine under the JV agreements following completion of a Scoping Study.

The White Devil deposit remains open along strike to the east and west and at depth, showing strong potential for resource growth.

The mining lease application was lodged on the 19 May 2025 to allow additional space for the expanded footprint that is required for the larger waste dumps, water ponds, onsite workshops, ROM transfer pads, site offices and potentially a small mine camp if needed for a large open pit and underground development.
Related AssetTennant Mine

Owners

SourceSource
CompanyInterestOwnership
Emmerson Resources Limited 25 % Indirect
Pan African Resources plc 75 % Indirect
The White Devil project is currently an Exploration Joint Venture comprising 75% Tennant Mining (TCMG), a wholly owned subsidiary of Pan African Resources, and 25% Emmerson Resources Limited (ERM). The anticipated ownership structure for a Major Mine Joint Venture is 60% TCMG and 40% ERM.

Any major discovery or extension to an existing mine with a Scoping Study containing more than 250,000 oz of gold, as at White Devil, will be treated as a separate Major Mine Joint Venture. Emmerson may either maintain its equity by contributing 25% or elect to be free carried at 10% through completion of a Definitive Feasibility Study (DFS). While contributing, ERM may claw back 15% to re-establish a 40% interest in the Major Mine, subject to certain conditions. Emmerson has advised Tennant Mining of its intention to contribute to ongoing activities at White Devil and to exercise its clawback rights. Accordingly, the Company will retain a 40% contributing interest in the White Devil Project.

Contractors

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SourceSource

Deposit type

  • IOCG

Summary:

Geology
Tennant Creek Au-Cu-Bi mineralisation is typically hosted in hematite-magnetite-quartz-jasper ironstones within the Lower Proterozoic Warramunga Formation.

Locally the Warramunga Formation consists of interbedded greywacke, sandstone and shale, weathered at the surface to a deep red to orange colour. Below the oxidised zone, the sediments are pale green to grey-green in colour. Bedding thickness varies from a fine parallel lamination in shale (1 to 5 mm), to thick, massively bedded sandstone and greywacke (0.5 to 3 m). Cutting through the sediments are two structural corridors, both are characterised by strong chlorite alteration, which is oxidised to haematite in the 100 or so metres below the surface. Chlorite alteration is gradational from the surrounding sediments, peaking towards the centre of the structures. Bodies of hematite ± magnetite ± quartz, locally termed ironstones, are located in both structures.

Cutting through the sediments are a number of quartz + feldspar porphyries. The porphyries are characterised by a quartz + feldspar groundmass with quartz “eyes” typically between 0.5cm to 1.0cm long. Larger feldspar crystals are common with sizes from 1.0cm to 2.0cm. Quartz veins are also common, trending roughly east-west and steeply dipping.

White Devil is situated in a northwest trending structural corridor. The gold-bearing ironstone bodies at White Devil strike NW-SE, are steeply dipping with high grade lodes plunging northwest within the overall ironstone units. There is an apparent overall easterly plunge, however this apparent easterly plunge could be as a result of the data density and location of drill data. White Devil produced 761,072oz of gold at a head grade of 14.6g/t gold from 1987 to mid-1999. Mining ceased as a result of the low gold price at this time and not due to depletion of the deposit.

In the mine area, bedding and a slatey cleavage (S1) strike E-W and have been lifted sub-vertically by the associated shears of the thrust. This movement developed a second semi-ductile to brittle deformation event generating a fabric S2 close to S1 in orientation. This phase which is controlled access to the mineralising fluid into the Fe-Mg-Si alteration complex. A later series of subvertical, NW trending quartz-feldspar porphyry dykes cut through the mine area, truncating and sinistrally offsetting several ore lenses.

Mineralisation occurs predominantly with the ironstones.

While the porphyries truncate the mineralization, low grade mineralisation occurs on the margins and a small proportion of porphyry lithology is included within the mineralised envelope.

Dimensions
• The White Devil deposit Mineral Resource has an approximate strike length of 1,400m;
• The plan width of mineralised zones in the model ranges from 3 m to 30m, with a depth range of from surface to 500m below surface.

Reserves

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Mining Methods

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Required Heavy Mobile Equipment

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Comminution

Crushers and Mills

Milling equipment has not been reported.

Processing

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Commodity Production

CommodityUnitsAvg. AnnualLOM
Gold oz 64,000 *450,300 *
All production numbers are expressed as metal in doré. * According to 2025 study.

Operational metrics

Metrics
Annual processing rate  ....  Subscribe
Stripping ratio OP  ....  Subscribe
Waste tonnes, LOM  ....  Subscribe
Ore tonnes mined, LOM  ....  Subscribe
Total tonnes mined, LOM  ....  Subscribe
Tonnes processed, LOM  ....  Subscribe
* According to 2025 study.

Production Costs

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold AUD  ....  Subscribe
Assumed price Gold AUD  ....  Subscribe
* According to 2025 study / presentation.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M AUD  ......  Subscribe
Closure costs $M AUD  ......  Subscribe
Total CapEx $M AUD  ......  Subscribe
OP OpEx $M AUD  ......  Subscribe
UG OpEx $M AUD  ......  Subscribe
OP/UG OpEx $M AUD  ......  Subscribe
Processing OpEx $M AUD 199.2
Transportation (haulage) costs $M AUD 29.6
Total OpEx $M AUD  ......  Subscribe
Royalty payments $M AUD  ......  Subscribe
Gross revenue (LOM) $M AUD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M AUD  ......  Subscribe
Pre-tax NPV @ 5% $M AUD  ......  Subscribe
Pre-tax NPV @ 8% $M AUD  ......  Subscribe
Pre-tax payback period, years  ......  Subscribe

Personnel

Mine Management

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Workforce

Aerial view:

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