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Rietberg incline intersects "New" Cooper Suplhide Mineralisation ahead of known upper orebody
COPPER 360 LIMITED
Incorporated in the Republic of South Africa
(Registration number 2021/609755/06)
Share code: CPR
ISIN: ZAE000318531
(“Copper 360” or “the Company”)
RIETBERG INCLINE INTERSECTS ‘NEW’ COPPER SULPHIDE MINERALISATION AHEAD OF KNOWN UPPER OREBODY
Shareholders are advised that the incline at the Rietberg underground mine has intersected copper sulphide mineralisation about
16 metres before reaching the planned 300 Level (300L) elevation. This is earlier than expected from the Company’s geological model
and could represent a new mineralised body. Assays from bulk sampling (as per Company’s SOP) of the intersection have returned
representative grades ranging between 1.50% and 0.48% total copper.
Intersection and geological observations
The intersection was made on 6 October 2026, and management immediately followed up with geological mapping and sampling. The
mineralisation is hosted in the mafic rocks of the Koperberg Suite, with visible bornite and chalcopyrite.
Sampling and assay results
The planned 400 to 300 Level incline has progressed through this intersection, exposing approximately 6 metres of mineralised mafic
rocks. To obtain representative samples, two composite samples were collected from the stockpile of the mineralised material. The
samples were crushed to –10 mm, homogenised by coning and quartering, and subsequently submitted for assay. Samples were
assayed at QLS Laboratory (unaccredited) in Springbok for total sulphide copper (TCu%).
No acid-soluble analysis was done since no oxide copper minerals was observed and the intersection is far below the known oxide and
transition zones.
Quality control samples (1 Blank and 1 CRM) were included all returned results fell within acceptable industry limits.
Interpretation
The earlier-than-expected intersection may indicate 1) that the mineralisation extends beyond its currently modelled limits, or 2) that
a potential “offshoot” was intersected. Some legacy borehole intersections (data) are available in proximity, refer to Figures 1 and 2,
below. The Company will test this through further mapping, face sampling, and will update its geological model accordingly.
Note because of drill line spacing being more than 50m, the so-called SW mineralised mafic body is not included into Rietberg’s resource
and reserves. More resource delineation drilling is required and planned.
Mine plan
The intersection does not change the Company’s mine plan. Copper 360 will continue to establish the 300L according to its original
layout.
Comment from the Chief Executive Officer
Gordon Thompson, CEO of Copper 360, said:
“Reaching ore earlier than expected is significant. It tells us the ore zone possibly extends further than our model showed or that another
potential mineralised body is present. We will continue the investigation and stockpiling this fringe ore while we continue towards the
expected higher-grade zone. Our incline development remains on schedule, so this is a positive development.
The bornite and chalcopyrite showing in the sidewalls, now confirmed by the assays, is exactly what we have been working towards.
I want to thank every person at Rietberg, from the development crews and geologists to the engineers and support staff, for their
commitment and for doing this work safely. We will stay disciplined, follow our plan and establish 300L properly, and I am confident in
what this team can achieve.”
Competent Person statement
The underground intersection results presented in this announcement have been reviewed and approved by Dr Deon Vermaakt, PhD,
an Independent Competent Person, registered with the South African Council for Natural Scientific Professions (SACNASP),
registration number 400020/00.
Dr Vermaakt has sufficient experience relevant to the style of mineralisation and type of deposit under consideration to qualify as a
Competent Person as defined in the SAMREC Code.
Dr Vermaakt consents to the inclusion of the information in this announcement in the form and context in which it appears.
Stellenbosch
16 October 2026
Designated Advisor: Bridge Capital Advisors Proprietary Limited
Date: 16/10/2026 07:15:00
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