El Cedro sampling opens new horizons.
El Cedro sampling opens new horizons.
• Soil sampling completed at El Cedro south - prospectivity enhanced
• Aeromag over El Cedro and APTA now completed
• Pepas rig moved from Pepas West to new target
London, April 28th, 2026. Orosur Mining Inc. (“Orosur” or the “ Company”)
(TSXV/AIM:OMI), is pleased to announce an update on the progress of exploration
activities at the Company’s exploration project at Anzá in Colombia (“Anzá”).
Anzá – Colombia
The Anzá Project in Colombia comprises a number of granted exploration titles and
applications totalling roughly 330km2, within the Mid-Cauca gold belt, west of the city
of Medellin.
These titles and applications are owned by two Colombia n companies, Minera Anzá,
and Minera Monte Aguila, both wholly owned subsidiaries of the Company. The latter
of these was acquired by Orosur in November 2024 from the Company’s previous JV
partners, Newmont Mining and Agnico Eagle Mines. Orosur thus owns 100% of the
Anzá Project.
Since acquiring 100% control, the Company has focussed its attention on three
prospects:
• Pepas - a shallow, high -grade body of gold mineralisation for which the
Company has calculated a Mineral Resource Estimate (“MRE”), announced on
February 10th 2026.
• APTA - a high-grade body of gold mineralisation that has to date seen over
38,000m of historical drilling, and at which drilling is currently underway.
• El Cedro - a cluster of gold porphyry intrusions in the south of the Project area
that are currently subject to mapping and sampling programs, with a view to
potentially being drilled later in H1 2026.
Figure 1. Anzá Project
El Cedro
The El Cedro prospect lies to the south of the same integrated licence that hosts both
Pepas and APTA and is roughly 4km south of the APTA base camp.
Work on the area began some years before Orosur’s tenure, when Anglo American
undertook reconnaissance mapping and sampling, identifying a highly prospective
gold/copper porphyry system. This work was largely focussed on a small soil program
in the centre of what was known of the northern porphyry, plus mapping in flanking
creeks and drainages which identified several veins systems with rock chips returning
over 10 g/t Au.
Little work was then undertaken until late 2021, when the Company’s previous JV
partner, MMA, re-entered the area to carry out mapping, sampling and ground
geophysics that largely confirmed Anglo American’s previous work and mapped
several large dioritic intrusions and associated epithermal systems.
Post resumption of control of the Project, t he Company began a large -scale soil
geochemical survey in May 2025, planned to cover most of what was thought to be
the extent of the porphyry system as it was known at the time . Soil samples were
taken at roughly 25m intervals, along ridges and spurs for ease of access and to
ensure soils were residual. Results from this work were announced on October 30th,
2025, which included the identification of a second intrusive body immediately south
of the known northern body.
Figure 2. Regional Tectonic Setting
Identification of this second body led to the commencement of an additional soil and
mapping program to the same specifications.
Assay results from this new program demonstrate this southern intrusive system to be
largely similar to the northern body, demonstrating high grade gold in soils , at
times over 1g/t Au, over total area of roughly 2km x 3km.
Mapping suggests both intrusive systems to be geologically similar and therefore likely
to be related events (albeit based on limited outcrop) but with slightly different
geomorphological settings and soil profiles.
Both sit within the same N -S structural corridor with the highest-grade soil and rock
chip samples being in fault systems between the two intrusions and on the flanks of
each, suggesting the presence of porphyry associated epithermal systems.
Figure 3. El Cedro soil samples, combined north and south centres (over previous mag)
A detailed drone mounted magnetic survey has just been completed over the southern
portions of the Anzá project area, including El Cedro and APTA. It is anticipated that
several weeks may be required to finalise processing of these data, which can then
be used in conjunction with the recent sampling data at El Cedro and drilling currently
underway at APTA, to develop new drill targets in the region.
It is anticipated that drilling can commence at El Cedro in the near term once targeting
and access permitting has been completed.
Pepas
As announced on April 14th, 2026, a new zone of gold mineralisation (“Pepas West”)
has been discovered some 100m west of the Pepas deposit, which geologically, bears
a close resemblance to Pepas.
Excluding two previous holes from early 2025, in this recent campaign, nine holes
have now been drilled into this new zone (PEP082 to PEP090). Results from holes
PEP082 and PEP083 have already been announced, with samples from the remaining
holes either in the laboratory or being prepared for shipment.
In the meantime, the decision has been taken to temporarily move the Pepas rig to a
new target several hundred metres to the south, which will also allow time for data
from this recent drilling at Pepas West to be compiled and examined.
Mineralisation identified in this new western zone closely resembles Pepas,
suggesting the possibility that both are derived from the same original source, but then
broken up by post mineralisation faulting. The Company believes it is important to
understand the structural setting that has led to the emplacement of Pepas West and
the implications of this for both extension and repetitions.
Orosur CEO Brad George commented:
“With the po ssibility of three rigs operating soon on three prospects , Anzá is now
inexorably growing in scope , scale and complexity . The picture is emerging of a
substantial mineralised province, the surface of which is only now starting to be
scratched.”
For further information, visit www.orosur.ca, follow on X @orosurm or please contact:
Orosur Mining Inc
Louis Castro, Chairman,
Brad George, CEO
Tel: +1 (778) 373-0100
SP Angel Corporate Finance LLP – Nomad & Joint Broker
Caroline Rowe / Jen Clarke / Devik Mehta
Tel: +44 (0) 20 3470 0470
Turner Pope Investments (TPI) Ltd – Joint Broker
Andy Thacker/Guy McDougall
Tel: +44 (0)20 3657 0050
Flagstaff Communications and Investor Communications
Tim Thompson
Mark Edwards
Fergus Mellon
Tel: +44 (0)207 129 1474
The information contained within this announcement is deemed by the Company to constitute inside
information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 ('MAR') which has
been incorporated into UK law by the European Union (Withdrawa l) Act 2018. Upon the publication of
this announcement via Regulatory Information Service ('RIS'), this inside information is now considered
to be in the public domain.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies
of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
About Orosur Mining Inc.
Orosur Mining Inc. (TSXV: OMI; AIM: OMI) is a minerals explorer and developer currently operating in Colombia
and Argentina.
Qualified Persons Statement
The information in this news release was compiled, reviewed , verified and approved by Mr. Brad George, BSc
Hons (Geology and Geophysics), MBA, Member of the Australian Institute of Geoscientists (MAIG), CEO of Orosur
Mining Inc. and a qualified person as defined by National Instrument 43-101.
Orosur Mining Inc. staff follow standard operating and quality assurance procedures to ensure that sampling
techniques and sample results meet international reporting standards.
Forward Looking Statements
All statements, other than statements of historical fact, contained in this news release constitute “forward looking
statements” within the meaning of applicable securities laws, including but not limited to the “safe harbour”
provisions of the United Stat es Private Securities Litigation Reform Act of 1995 and are based on expectations
estimates and projections as of the date of this news release.
Forward-looking statements include, without limitation, the continuing focus on the Pepas prospect, the exploration
plans in Colombia and the funding of those plans, and other events or conditions that may occur in the future.
There can be no assurance that such statements will prove to be accurate. Actual results and future events could
differ materially from those anticipated in such forward -looking statements. Such statements are subject to
significant risks and uncertainties including, but not limited to, those described in the Section “Risks Factors” of the
Company's MD&A for the year ended May 31, 2025. The Company’s continuance as a going concern is dependent
upon its ability to obtain adequate financing . This material uncertaint y may cast significant doubt upon the
Company’s ability to realize its assets and discharge its liabilities in the normal course of business and accordingly
the appropriateness of the use of accounting principles applicable to a going concern. The Company disclaims any
intention or obligation to update or revise any forward -looking statements whether as a result of new information,
future events and such forward-looking statements, except to the extent required by applicable law.