REG - Aterian PLC - Ground Magnetics Underway at Agdz Cu-Ag Project

AterianAnnouncement

15/04/2026 07:00

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RNS Number : 4580A  Aterian PLC  15 April 2026

15 April 2026

 

Aterian plc

("Aterian" or the "Company" or the "Group")

 

Ground Magnetics Underway at Agdz Cu-Ag Project

 

Aterian plc (AIM: ATN), the Africa-focused critical metals exploration
company, is pleased to announce the commencement of a ground-based magnetic
geophysical survey at its 100%-owned Agdz Copper-Silver Project ("Agdz" or the
"Project") in the Kingdom of Morocco ("Morocco").

 

The programme represents a key step in advancing Agdz from surface discovery
towards drill target definition, following the Company's recent announcement
on 29 January 2026, which highlighted a significant expansion in the footprint
of copper-silver mineralisation.

 

Highlights:

·      111 line km ground magnetic survey underway across 11.20 km(2).

·      c.28% of the planned survey completed.

·      Survey targeting fault-controlled copper-silver bearing breccias
identified in recent fieldwork.

·      Mineralisation traced over up to 0.9 km strike, with potential
for further extension.

·      Following up on historic and recent assays, including 3.47 % Cu
with 136 g/t Ag and 1.34 % Cu with 31 g/t Ag.

·      Expanding total ground magnetic coverage to 322 line km over 20.8
km² (from 195 line km historically)

·      This objective is to rapidly define new drill-ready targets
across an expanding mineralised footprint.

 

Strategic Context

The current programme is designed to define the geometry, continuity and scale
potential of multiple sub-parallel, structurally controlled mineralised zones,
while also exploring for new unrecognised targets across underexplored areas
of the Project.

 

The survey forms part of a systematic exploration workflow that integrates
geophysics with ongoing field mapping and sampling, with the objective of
rapidly generating a pipeline of high-quality, drill-ready targets.

 

Importantly, the results of the ground magnetics programme will be integrated
with the structural targeting work currently being undertaken by Lithosquare,
enabling a multi-disciplinary approach to target refinement and
prioritisation.

 

Charles Bray, Chairman of Aterian, commented:

"The launch of this ground magnetics programme marks the next step forward in
progressing Agdz from surface discovery towards new drill target definition.

 

Following the encouraging results announced earlier this year, which expanded
the mineralised footprint and the prior exploratory drilling results, we are
now systematically advancing our understanding of the scale and continuity of
the system, both along strike and across previously underexplored areas. The
results from this survey will also directly support and enhance Lithosquare's
targeting work, ensuring that multiple datasets are integrated to refine and
prioritise high-quality targets.

 

With the survey progressing well and supported by parallel fieldwork, we are
focused on rapidly refining targets and building a robust pipeline of
drill-ready opportunities as we move Agdz into its next phase of exploration."

 

Ground Magnetics Programme

The survey is designed to define the along-strike continuity of multiple
sub-parallel, linear copper-bearing fault breccias, which individually outcrop
discontinuously over a strike length of up to 0.9 km. The programme also
targets the identification of additional prospective structures that may be
hidden beneath the surface.

 

The programme is being conducted by an independent geophysical contractor
using a GEM GSM-19 Overhauser magnetometer, with the following parameters:

·      60 lines for a total of 111 line km.

·      Average line length - 1.85 km.

·      100 m line spacing.

·      Three contiguous grids covering a total of 11.20 km(2).

·      Estimated a two-week timeframe for data acquisition.

·      Modelling, interpretation and reporting are estimated at 4 weeks.

 

Next Steps

Based on the results of the ground magnetics survey, the Company intends to:

·      Define priority target areas for follow-up work.

·      Undertake detailed geological mapping and trenching.

·      Undertake an Induced Polarisation (IP) / resistivity survey over
priority targets.

·      Advance a ranked pipeline of drill-ready targets.

 

Project Summary

Aterian holds a 100% interest in the 50.4 km² Agdz Copper-Silver Project,
comprising the 34.5 km² Agdz licence and the adjacent 15.9 km² Agdz Est
licence in central Morocco.

 

The Project is located in the highly prospective Anti-Atlas Mountains within
the Drâa Tafilalet region, approximately 35 km east of Ouarzazate, a
well-serviced regional hub with an airport and established infrastructure. The
Project benefits from excellent access via paved and unpaved roads. It is
situated approximately 40 km southeast of the Noor solar power complex, one of
the world's largest renewable energy facilities.

 

Agdz is located within Morocco's highly prospective Anti-Atlas belt, a stable
and well-established mining jurisdiction with growing strategic importance for
copper supply.

 

The Agdz Project is situated within a well-established copper-silver mining
district, approximately 14 km southwest of the Bouskour copper-silver mine (19
Mt at 1.44 % Cu and 12 g/t Ag Measured & Indicated and 9 Mt at 1.61 % Cu
Proven & Probable(1)) and within trucking distance of existing mining
infrastructure. The world-class Imiter silver mine (192 M Oz Ag Measured &
Indicated and 152 M Oz Ag Proven & Probable(2)) lies approximately 80 km
northeast of the Project, with both operations owned by Managem Group. While
mineralisation at neighbouring deposits is not necessarily indicative of
mineralisation at Agdz, their presence underscores the district-scale
prospectivity of the Anti-Atlas Belt.

 

 

Illustrations
The following figures/images have been prepared by Aterian and relate to the
disclosures in this announcement.

Qualified Person

The technical disclosure in this regulatory announcement has been approved by
Simon Rollason, Chief Executive Officer of Aterian Plc. A graduate of the
University of the Witwatersrand in Geology (Hons). He is a Member of the
Institute of Materials, Minerals and Mining, with over 30 years of experience
in mineral exploration and mining.

 

- ENDS -

 

This announcement contains information which, prior to its disclosure, was
inside information as stipulated under Regulation 11 of the Market Abuse
(Amendment) (EU Exit) Regulations 2019/310 (as amended).

 

Engage directly with the Aterian PLC management team by asking questions,
watching video summaries, and seeing what other shareholders have to say.
Please navigate to our interactive investor hub here:
https://aterianplc.com/s/fcf8eb (https://aterianplc.com/s/fcf8eb)

 

For further information, please visit the Company's website:
www.aterianplc.com (http://www.aterianplc.com) or contact:

 

Aterian Plc:

Charles Bray, Executive Chairman - charles.bray@aterianplc.com
(mailto:charles.bray@aterianplc.com)

Simon Rollason, CEO & Director - simon.rollason@aterianplc.com
(mailto:simon.rollason@aterianplc.com)

 

Financial Adviser and Joint Broker:

AlbR Capital Limited

David Coffman / Dan Harris

Tel: +44 (0)207 7469 0930

 

Joint Broker:

SP Angel Corporate Finance LLP

Ewan Leggat / Devik Mehta

Tel: +44 20 3470 0470

 

Financial PR:

Bald Voodoo - ben@baldvoodoo.com (mailto:ben@baldvoodoo.com)

Ben Kilbey

Tel: +44 (0)7811 209 344

 

Subscribe to our news alert service: https://atn-l.investorhub.com/auth/signup
(https://atn-l.investorhub.com/auth/signup)

Notes to Editors:

About Aterian plc

www.aterianplc.com (http://www.aterianplc.com)

 

Aterian plc is an LSE-listed exploration and development company with a
diversified African portfolio of critical metals projects.

Aterian plc is actively seeking to acquire and develop new critical metal
resources to strengthen its existing asset base while supporting ethical and
sustainable supply chains as the world transitions to a sustainable, renewable
future. The supply of these metals is vital for developing the renewable
energy, automotive, and electronic manufacturing sectors, which are
increasingly important in reducing carbon emissions and meeting global climate
ambitions.

 

Aterian has a portfolio of multiple copper-silver (+gold) and base-metal
projects in Morocco. Aterian holds a 90% interest in Atlantis Metals, a
private Botswana-registered company holding eleven mineral prospecting
licences for copper-silver in the world-renowned Kalahari Copperbelt and three
for lithium and salt brine exploration in the Makgadikgadi Pans region. The
Company also holds an exploration licence in southern Rwanda, where it is
evaluating the tantalum and niobium opportunity, in addition to further
exploring for pegmatite-hosted lithium.

 

The Company's strategy is to seek new exploration and production opportunities
across the African continent and to develop new sources of critical mineral
assets for exploration, development, and trading.

Glossary of Terms

The following is a glossary of technical terms:

 

 "Ag"                              means  Silver
 "Au"                              means  Gold
 "Breccia"                         means  a rock consisting of angular fragments of rock cemented by finer materials
 "Cu"                              means  Copper
 "Ferruginous"                     means  containing iron oxides
 "Float sample"                    means  loose pieces of rock that are not connected to an outcrop
 "g/t"                             means  grams per tonne
 "Hercynian or Variscan Orogeny"   means  an orogenic belt that evolved during the Devonian and Carboniferous periods,
                                          from about 419 to 299 million years ago
 "km"                              means  Kilometres
 "m"                               means  Metres
 "mm"                              means  Millimetres
 "Mt"                              means  millions of tonnes
 "NI 43-01"                        means  National Instrument 43-101 Standards of Disclosure of Mineral Projects of the
                                          Canadian Securities Administrators
 "Outcrop"                         means  a rock formation that is in situ and visible on the surface
 "Qualified Person"                means  a person that has the education, skills and professional credentials to act as
                                          a qualified person under NI 43-101
 "Sb"                              means  Antimony is used in alloys and in lead-acid storage batteries. The U.S.
                                          government has considered antimony a critical mineral mainly because of its
                                          use in military applications.
 "Stratiform"                      means  parallel to the bedding planes of the surrounding rock
 "Vein"                            means  a distinct sheetlike body of crystallised minerals within a rock
 "Zn"                              means  Zinc

 

 

 1  (#_ftnref1) Source: Managem Group - Bouskour project (managemgroup.com).

(2) Source: Managem Group - Imiter mine (managemgroup.com).

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