Orosur Mining Inc - Exceptional results at Pepas
Orosur Mining Inc - Exceptional results at Pepas
• Assays from nine more holes at Pepas and surrounds. Best results
include:
o PEP040 - 10.25m @ 1.35 g/t Au
o PEP041 - 31.75m @ 2.01 g/t Au
o PEP042 - 3.25m @ 4.89 g/t Au
o PEP044 - 38.50m @ 6.01 g/t Au
o PEP045 - 62.3m @ 12.76 g/t Au
o PEP046 - 53.2m @ 3.36 g/t Au
• Geological studies developing new concepts for later testing.
London, July 17 th 2025. 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 flagship Anzá Project
("Project") in Colombia.
Colombia - ANZÁ Project
The Anzá Project is now 100% owned by the Company following completion of
a Share Purchase Agreement ("SPA"), announced 28 th November 2024,
whereby the Company purchased all of the shares of its previous JV partner;
Minera Monte Aguila ("MMA").
The Project, which is located 50km west of Medellin, is easily accessible and
boasts excellent infrastructure including water, power and communications as
well as a large exploration camp.
The Project sits within the prolific mid-Cauca belt, Colombia's primary gold belt,
and is located along strike between several world class gold/copper deposits
including Buritica, Quebradona and Guayabales/Marmato (Figure 1).
From September 2018 to November 2024, the Anzá Project was under the
control of its previous JV partner MMA, itself a 50/50 venture between the
world's two largest gold miners, Agnico Eagle Mines and Newmont Mining.
Figure 1. Mid-Cauca Belt
Prospects
The Company is currently focussed on three prospects within the Anzá Project
- Pepas, APTA and El Cedro. All three prospects are within the same granted
exploration title that is broken into two, non-contiguous pieces (Figure 2).
Drilling is currently being undertaken at the Pepas prospect in the northern
extent of the Anzá Project (pre-acquisition) over 10km north of the central base
camp at APTA. In parallel, mapping and sampling is being undertaken over the
El Cedro porphyry system in the south of the project area.
Figure 2. Main prospects, licences pre-MMA acquisition
Pepas Prospect
Pepas was discovered by MMA in late 2021 by BLEG sampling and geological
mapping, followed by 11 diamond drill holes in 2022 (PEP001 to PEP011).
After completion of the transaction to buy MMA ("Transaction"), the Company
restarted drilling at Pepas in late-November 2024.
Drilling commenced with hole PEP012, which was positioned to confirm
previous high-grade results in holes PEP001, PEP005 and PEP007 drilled in
2022.
Figure 3. Plan of holes
Drilling at Pepas, post Transaction, has largely concentrated on a small central
core, where a body of high -grade gold mineralisation is being defined from
surface. Additional drilling has also been undertaken around this central core
to understand the w ider geological context and as the commencement of a
larger scale exploration program.
Of the nine holes discussed in this announcement, six (PEP038 to PEP043)
were drilled around but outside the Pepas core, while three (PEP044 to
PEP046) have been drilled as part of the previously announced infill program
that is designed to move Pepas to a Mineral Resource Estimate (MRE).
PEP038 was drilled to the north at what is referred to as Pepas North. This was
the third of three holes drilled here as the first move to this area, following up
positive surface geochemical results. This hole was drilled orthogonal to the two
previous h oles, to provide the maximum lithological and structural
information. PEP038 returned a result of 16.8m @ 0.68g/t Au. As with the two
previous holes in this vicinity, this hole demonstrates the scale of the epithermal
system that hosts Pepas and has provided valuable information to understand
the controls of this system.
PEP039 was a speculative exploration hole drilled a substantial distance to the
south and west of the Pepas core, following up zones of surface silicification.
No substantial results were returned.
PEP040 was drilled outside the known Pepas envelope to the SW, to test lower-
level shallow mineralisation previously identified by earlier drilling. The hole
returned a small intersection of 10.25m @ 1.35g/t Au from surface (figure 4)
that indicates the potential for a body of satellite mineralisation, adjacent to the
Pepas core, that will require additional follow up.
Figure 4. PEP040 and PEP046 section
PEP041 was drilled outside the currently known Pepas envelope to the north to
test the northward extension of the mineralisation first identified by earlier
drilling undertaken by the Company's previous JV partner MMA. This hole
returned a positive intersection of 31.75m @ 2.01 g/t Au, opening this area for
potential extension (figure 5).
Figure 5. PEP041 Section
PEP042 was drilled to the NE of the currently known central core of
mineralisation as a conceptual hole to test geophysical zones that were
identified by the recent airborne magnetic survey. No surface geochemical work
has yet been undertaken in this area. Several thin zones of encouraging gold
mineralisation were encountered in this hole, well outside the known
mineralised core (figure 6). This result has substantially increased the potential
of this area and will now be followed up with surface mapping a nd sampling,
and potentially later drilling.
Figure 6. PEP042 Section
PEP043 was drilled outside the known mineralised envelope to test areas of
surface silicification. No substantial intersections were recorded
Holes PEP044, PEP045 and PEP045 were all drilled as part of the previously
announced MRE infill program at Pepas.
A plan for this program has been developed to infill Pepas to sufficient degree
to potentially allow a high level (measured and indicated) MRE to be calculate,
but also to assist in understanding the controls upon mineralisation and to better
define the ve ry high -grade zones that have the potential to add substantial
ounces.
Results from these holes were exceptional, with PEP044 returning 38.5m @
6.01g/t Au, PEP045 returning 62.3m @ 12.76g/t Au and PEP046 returning
53.2m @ 3.36g/t Au (figures 4 and 7).
The Company feels these results vindicate its decision to begin the resource
drilling phase at Pepas, with these exceptionally thick, and high -grade results,
substantially upgrading the potential for contained ounces beyond what had
been assumed at the commencement of the process. In addition, the results,
particularly that of PEP045, have provided valuable insight to the primary
controls upon this mineralisation, suggestive of the main feeder zone being a
series of steeply dipper structures along the SW margin of the zone. The depth
extent implications of this theory will be tested in later drilling
Figure 7. PEP044 and PEP045 section
Drill intersections for these most recent holes are as follows:
Hole Number From (m) To (m) Interval
(m) Au (g/t)
PEP038 0 16.8 16.8 0.68
PEP039 No significant intersections
PEP040 0 10.25 10.25 1.35
PEP041 34.35 66.1 31.75 2.01
including 37.2 43.75 6.55 4.62
PEP042 104.8 107.55 2.75 1.41
116.45 119.7 3.25 4.89
PEP043 No significant intersections
PEP044 5.8 44.3 38.5 6.01