Empire Metals Ltd (AIM:EEE) Maiden Drilling Campaign at the Pitfield Project – a new “Giant” Copper System

Empire Metals Limited (LON: EEE), the AIM-quoted resource exploration and development company, is pleased to announce that the Company’s maiden drill programme is scheduled to commence by 31 March at the Pitfield Copper Project (“Pitfield”) located in Western Australia, with a total of 3,100 metres of Reverse Circulation (‘RC’) drilling planned.


· Commencement of a reconnaissance RC drilling campaign at Pitfield which has demonstrated strong potential to be a newly discovered “Giant” copper province;

· Drilling to focus primarily on the Mt Scratch prospect area of the licence where the Company has identified an extensive, highly chargeable-highly resistive anomaly;

· This highly chargeable-highly resistive anomaly was identified during the recent Dipole-Dipole Induced Polarisation (‘D-D IP’) surveys (announced 6 February 2023), the results of which suggested the presence of large, disseminated sulphide mineralised zones.

· The maiden drill campaign will consist of 20 RC drill holes covering a total of 3,100 metres, with the average downhole depth of each hole being approximately 150 metres.

Shaun Bunn, Managing Director, said: “I am pleased to announce the confirmation of a commencement date for our maiden, reconnaissance drilling campaign at Pitfield which follows on from the success of the Company’s recent DD-IP surveying and geochemical mapping activities. The objective of this maiden drill programme is to better understand the geology and to determine the significance of the highly chargeable-highly resistive zones identified from the DD-IP survey results.

“We are also continuing with our soil sampling and DD-IP surveying activities over the coming months to identify additional drill targets at Pitfield and will be looking to commence a second drilling campaign once we have had the opportunity to interpret the results from this reconnaissance mission. I look forward to providing further updates on our drilling campaign as results become available.”

The Pitfield Copper Project

Empire holds a 70% interest in Pitfield which is comprised of four granted Exploration Licences (E70/5465, E70/5876, E70/6320 and E70/6323) covering 1,042km2. Pitfield is located near Three Springs, a town 313km north of Perth, Western Australia on the Midlands Road, which until the opening of the Brand Highway in 1975 was the main road route from Perth to the state’s north (refer Figure 1).

Figure 1.              Pitfield Project Location

Pitfield lies within the Neoproterozoic Yandanooka intracratonic sedimentary basin which has all the hallmarks of a “Giant” copper mineralised system, potentially containing multiple Sediment-hosted Stratabound Copper (‘SSC’) deposits. The Neoproterozoic is one of the major SSC mineralisation epochs, temporally associated with the break-up of the Rodinia supercontinent and is associated with several of the largest copper SSC deposits discovered to date, the most important deposits being located in the Central African Copperbelt of Zambia and Democratic Republic of Congo.

The Company’s interpretation of Pitfield and the associated geological model is based on a basin scale alteration event, involving hot oxidising, fluids carrying copper leached from the “red beds” and basement mafic rock, which upon contact with reductants within the upper siltstones/sandstones resulted in the copper precipitating and depositing along the reduced stratigraphic layers.

This view is strongly supported by the results from geophysical surveys (including gravity, magnetics, electro-magnetics and DD-IP), soil sampling and geochemical mapping, surface geological mapping and rock sampling which individually or combined have:

· confirmed that an exceptionally large, oxidised fluid event has occurred, extending over 40km N-S, as evidenced by magnetite-altered stratigraphy and corresponding reduced conductance (likely due to removal of graphite in the siltstone);

· identified widespread copper, silver, nickel and zinc anomalism over large parts of the Yandanooka basin (both by previous explorers and Empire), particularly in association with magnetite-altered rocks;

· identified several anomalies with DD-IP chargeable values that exceed the threshold that would be considered characteristic of the presence of disseminated sulphides; and

· confirmed that these chargeable anomalies are also highly resistive and are closely associated with the magnetite-altered stratigraphy and are coincident with strong copper anomalism in both soils and rocks.

Planned Drilling Programme

The DD-IP survey traverses (refer Figure 2) have identified multiple drilling targets . The highly chargeable anomaly detected in the three DD-IP survey lines (PM01-03) just southwest of Mt Scratch appears to be very extensive, covering an area of at least 1,500m in length and up to 800m wide. A second highly chargeable anomaly was identified in DD-IP survey line GC01, located 12km south, which lies in a similar geological setting to that of Mt Scratch, highlighting the extent of the system.

Map Description automatically generated with medium confidence

Figure 2.  Location of DD-IP traverses.

The main focus of the reconnaissance drill programme, where 16 out of a total of 20 RC drill holes are planned, is to explore this extensive highly chargeable anomaly near Mt Scratch, and in particular to drill adjacent to D-D IP line PM01 which islocated in the same vicinity as the high-grade soil and rock samples that were recently collected (announced 30 January 2023) (Refer Figure 3).

Map Description automatically generated

Figure 3. High Cu-in-soil and rock samples located in close proximity to DD-IP traverses. The majority of the drill holes are located around Line PM01.

The IP Inversion models generated from the D-D IP surveys were prepared by Terra Resources Pty Ltd (“Terra”) which specialises in geophysical survey design, acquisition, processing, modelling, inversion, data integration, interpretation and drill hole targeting.

The IP Inversion models for DD-IP traverse PM01 is presented below in Figure 4. The IP Inversion model has been coloured to highlight in red areas where the chargeability exceeds 15mV/V, which is indicative of permissive sulphide zones.

Figure 4  PM01 (L6753800N) – Sulphide Cutoff (15 mV/V) Colouring

In order to better define areas to focus the maiden drill programme the IP Inversion model was run without the sulphide cutoff filter set at 15mV/V (refer Figure 5). The benefit of this was to highlight a very high chargeability response subset within the larger zone that was permissive for sulphides. This has allowed our exploration team to refine the drilling plan, and to establish high priority targets within this broad area of anomalism.

Figure 5.  PM01 (L6753800N) – Optimised Colouring


For further information please visit www.empiremetals.co.uk  or contact:

Empire Metals Ltd

Shaun Bunn / Greg Kuenzel

Tel: 020 7907 9327

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