DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
p.1 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
News Release
DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
Toronto, Ontario, September 20, 2026 – DPM Metals Inc . (TSX: DPM , ASX: DPM ) (ARBN: 689370894) (“DPM” or
“the Company”) is pleased to report results from delineation drilling at the Brevene Porphyry South high-
grade, gold -copper discovery, located in the southeastern part of the Company’s Brevene exploration
licence and contiguous with the Chelopech mine concession.
Highlights include:
• New significant drillhole intercepts:
▪ EX_BRES_555_02A: An additional 679 metres have been drilled and assayed for this previously
reported hole, with final results extending the mineralization intercept to 716.60 metres grading
3.30 g/t AuEq, comprising of 1.63 g/t Au, 1.58% Cu and 17.09 g/t Mo from 1,357 metres downhole,
including 138.60 metres grading 5.71 g/t AuEq, comprising of 2.83 g/t Au, 2.72% Cu and 9.99 g/t
Mo from 1,935 metres downhole.
▪ EX_BRESPO_03: An additional 341 metres have been drilled and assayed for this previously
reported hole, with final results extending the mineralized intercept to 1,054 metres grading 2.49
g/t AuEq, comprising of 1.20 g/t Au , 1.20% Cu and 43.46 g/t Mo from 1,172 metres downhole,
including 465 metres grading 3.02 g/t AuEq, comprising of 1.49 g/t Au, 1.44% Cu and 20.70 g/t Mo
from 1,487 metres downhole.
▪ EX_BRESPO_03A: 707 metres grading 1.08 g/t AuEq, comprising of 0.5 6 g/t Au, 0.48% Cu and
40.18 g/t Mo from 1,175 metres downhole
▪ EX_BRESPO_05: 328 metres grading 3.28 g/t AuEq, comprising of 1.97 g/t Au, 1.24% Cu and
4.82 g/t Mo from 1,176 metres (hole ongoing)
▪ EX_BRESPO_06: 540 metres grading 1. 31 g/t AuEq, comprising of 0. 69 g/t Au, 0.57% Cu and
32.93 g/t Mo from 1,143 metres downhole
▪ EX_BRESPO_07: 142 metres grading 1.42 g/t AuEq, comprising of 0.72 g/t Au, 0.65% Cu and
29.60 g/t Mo from 1,455 metres downhole (hole ongoing)
EX_BRESPO_250_01: 98 metres grading 0.78 g/t AuEq, comprising of 0.37 g/t Au, 0.38% Cu and
38.49 g/t Mo from 1,310 metres downhole (hole ongoing)
See Table 1 and associated footnotes for full results from drilling and for details on the gold equivalent calculation. Refer to the
news release issued June 3, 2026, available on our website, for more information regarding previously reported results for the
Brevene Porphyry South prospect.
• Potential to extend mineralization in multiple directions : Drilling has confirmed a large potassic
alteration envelope exceeding 500 metres by 500 metres and more than 1,000 metres in vertical extent,
with mineralization extending onto the central to northwest ern boundary of the Chelopech mine
concession. The system remains open to the north, south, west, and at depth, where it is interpreted to
plunge southwest.
p.2 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
• Pursuing large -scale development option : Up to 15,000 metres of additional drilling from the
Chelopech mine concession is planned through year-end 2026, followed by continued delineation
through 2027. In parallel, the Company is advancing permitting activities to convert the Brevene
exploration licence to a mining concession under Bulgaria’s well-defined permitting framework.
• Encouraging metallurgical testwork results : Preliminary metallurgical testwork indicates that
Brevene Porphyry South mineralization is amenable to conventional rougher -cleaner flotation, with
open-cycle tests producing copper-gold concentrates at grades ranging between 10% to 25% for copper
and 12 g/t to 20 g/t gold.
• Adjacent to existing mining operations: The Brevene Porphyry South target benefits from its location
within an established mining district where DPM has over two decades of operating experience and an
existing social licence . This substantially derisks future development and positions Brevene Porphyry
South as a Tier One growth opportunity for the Company.
“Brevene Porphyry South continues to demonstrate exceptional scale and grade as our drilling program
advances to unlock substantial value for our shareholders as we advance this significant discovery,” said
David Rae, President and Chief Executive Officer of DPM Metals.
“In just three months, our exploration team has delivered exceptional drill intercepts in excess of 710 metres
with high copper-gold grades considering the porphyry-style mineralization. These new results confirm that
the high-grade porphyry system extends onto the Chelopech mine concession, with multiple holes currently
advancing through visible mineralization, demonstrating the potential to further extend mineralization.
“With up to eight drill rigs dedicated to the Brevene Porphyry South target and an additional 15,000 metres
of additional drilling planned through year-end, we are aggressively delineating a discovery that we believe
will transform the Chelopech camp into a Tier One asset.”
Brevene Porphyry South drilling progress
The Company continues to systematically advance its exploration program at the Brevene Porphyry South
target, with seven surface and two underground rigs currently focused on delineating the target (Figure 1).
The latest results confirm the vertical and lateral continuity of the porphyry-style mineralization and indicate
a northwestward extension of the potassic alteration envelope onto the Chelopech mine concession (Figure
2). This expanded alteration footprint highlights the size and scale of the prospect, which continues to
expand as drilling progresses.
Drillhole EX_BRES_555_02A extended the previously reported interval and returned 716.60 metres
grading 3.30 g/t AuEq (1.63 g/t Au, 1.58% Cu and 17.09 g/t Mo; see Table 1) from 1,357 to 2073.60 metres
downhole, including an exceptionally higher-grade interval of 138.60 metres grading 5.71 g/t AuEq (2.83
g/t Au, 2.72% Cu and 9.99 g/t Mo) from 1,935 metres to the end of hole. The results confirmed the lateral
extent of the gold-copper mineralization across the porphyry system (Figure 3). The drillhol e is
characterized by magnetite-chlorite-sericite alteration overprinting earlier potassic alteration, with anhydrite
veining and quartz-chalcopyrite-pyrite-magnetite sheeted veins and stockwork.
p.3 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
Drillhole EX_BRESPO_03 also extended the previously reported interval to 1,054 metres at an average
grade of 2.4 9 g/t AuEq (1.20 g/t Au , 1.20% Cu and 43.46 g/t Mo ) from 1,172 to 2,226 metres downhole
(Figure 4). The results demonstrate the significant vertical ext ent (over 1,000 metres) of Au-Cu
mineralization within the Brevene Porphyry South system. The mineralization is hosted by a strongly altered
porphyritic intrusion, where magnetite-chlorite-sericite alteration overprints earlier potassic alteration , and
characterized by quartz -dominated stockwork and sheeted veins, locally with silica flooding, hosting
abundant chalcopyrite-pyrite mineralization. Notably, this hole showed an increase in molybdenum content
at depth, with grades in the final 200 metres of core frequently returning assays above 100 g/t Mo.
Both drillholes EX_BRES_555_02A and EX_BRESPO_03 were stopped due to technical limitations and
both terminated in mineralization, which remains open at depth (Figure 5). The deeper extent of the Brevene
Porphyry South system will be further tested in the future.
Building on the results of the ongoing drilling program, drill hole EX_BRESPO_03A was designed to test
the northeast extent of the Brevene Porphyry South target and is located between EX_BRESPO_03 and
EX_BRES_01A. Assay results from this drillhole returned a wide interval grading 707 metres of 1.08 g/t
AuEq (0.56 g/t Au, 0.48% Cu and 40.18 g/t Mo) from 1,175 metres downhole. Molybdenum concentration
increases eastward with grades reaching up to 100 g/t Mo in the final 200 metres of the drillhole and
continues beyond the gold-copper mineralization.
Drillhole EX_BRESPO_05 is currently in progress and has intersected strong magnetite-chlorite-sericite
and potassic alteration, where the latter becomes more abundant as the hole advances. Current results
returned 328 metres at 3.28 g/t AuEq (1.97 g/t Au, 1.24% Cu and 4.82 g/t Mo) from 1,176 metres downhole
and the hole continues in significant visible mineralization.
An important revelation is the extension of the porphyry system northward onto the Chelopech mine
concession which was confirmed by drillhole EX_BRESPO_06. The intersected porphyry mineralization is
less intense compared to the nearby holes, and as of the date of this release , the drillhole returned 540
metres at 1.31 g/t AuEq (0.69 g/t Au, 0.57% Cu and 32.93 g/t Mo) from 1,143 metres downhole.
EX_BRESPO_07 is in progress from a drill position southwest of the interpreted mineralization. Widespread
phyllic alteration was observed in the upper parts of the drillhole, transitioning to magnetite-chlorite-sericite
alteration, which was observed within intrusive phases and metamorphic rocks. Drilling is currently
advancing through potassic-altered diorite and has so far returned an interval of peripheral mineralization
of 142 metres grading 1.42 g/t AuEq, comprising 0.72 g/t Au, 0.65% Cu and 29.60 g/t Mo from 1,455 metres
downhole.
Drillhole EX_BRESPO_08 is currently being drilled along the southern flank of the Brevene Porphyry South
target to test the potential extension of mineralization in this direction. After passing a section with weakly
potassic altered gneiss, the hole enter ed a diorite with a high content of chalcopyrite hosted in a quartz -
magnetite stockwork and disseminations.
Drillholes EX_BRESPO_09 and EX_BRESPO_10 were designed to test the extent of the mineralized
system toward southwest and northeast, respectively. At the time of this news release, both drillholes were
ongoing and had not yet reached their target depths.
p.4 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
Drillhole EX_BRESPO_250_01 is being drilled from an underground position to test the potential extension
of porphyry mineralization onto the Chelopech mine concession and its linkages with shallow seated, high-
sulphidation mineralization. Initially the hole intersected massive high-sulphidation type mineralization and
then passed into widespread deep -seated phyllic alteration , followed by magnetite-chlorite-sericite
alteration with chalcopyrite mineralization and quartz stockwork, with increasing intensity. At the time of this
release, the drillhole returned 98 metres at 0.78 g/t AuEq (0.37 g/t Au, 0.38% Cu and 38.49 g/t Mo) from
1,310 metres downhole and remains in progress.
Elsewhere, the results from EX_BRESPO_04A, which targeted the eastern flank of the prospect did not
return any significant intervals. The current geological interpretation suggests the Brevene Porphyry South
system is bounded to the northeast and southwest by inferred northwest -trending faults, which controlled
development of a sedimentary basin , as well as acting as conduits for emplacement of a porphyritic
intrusion (see Figure 3). This structural orientation is consistent with one of the major regional trends within
the Apuseni-Banat-Timok-Srednogorie metallogenic belt.
Ground magnetic surveying and updated three-dimensional magnetic models are being used to guide the
drilling program. The resulting high-magnetic anomaly correlates with the high-grade Au-Cu potassic core
of the porphyry system (Figure 6).
p.5 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
Table 1. Drill intercepts from exploration drilling at the Brevene Porphyry South target
HOLEID EAST NORTH RL AZ DIP
FROM TO LENGTH AuEq Au Cu Mo
(m) (m) (m) (g/t) (g/t) (%) g/t
EX_BRES_555_02A* 6639 30079 558 170 -60 1357 2073.6 716.6 3.30 1.63 1.58 17.09
including 1643 1929 286 3.54 1.80 1.64 12.41
including 1935 2073.6 138.6 5.71 2.83 2.72 9.99
EX_BRES_555_02B 6639 30079 558 hole ongoing
EX_BRESPO_03* 7192 28742 682 310 -72 1172 2226 1054 2.49 1.20 1.20 43.46
including 1487 1952 465 3.02 1.49 1.44 20.70
EX_BRESPO_04A 8037 29951 704 250 -58 no significant intervals
EX_BRESPO_03A 7192 28743 682 310 -72 1175 1882 707 1.08 0.56 0.48 40.18
including 1191 1202 11 1.51 0.99 0.49 14.49
including 1252 1270 18 2.04 1.22 0.78 9.05
including 1284 1324 40 1.66 0.81 0.81 10.25
EX_BRESPO_03B 7192 28743 682 hole ongoing
EX_BRESPO_05 6566 28819 689 54 -80 1176 1504 328 3.28 1.97 1.24 4.82
hole ongoing
EX_BRESPO_06 6558 28823 689 350 -77 1143 1683 540 1.31 0.69 0.57 32.93
including 1313 1325 12 2.14 1.38 0.70 25.33
including 1355 1413 58 2.11 1.13 0.92 18.75
including 1445 1481 36 2.14 1.49 0.61 17.53
including 1657 1683 26 2.35 1.10 1.17 23.26
EX_BRESPO_06A 6558 28823 689 20 -73 hole ongoing
EX_BRESPO_07 6356 28433 679 14 -78 1455 1597 142 1.42 0.72 0.65 29.60
including 1553 1597 44 2.49 1.32 1.10 11.35
hole ongoing
EX_BRESPO_08 7184 28741 682 300 -75 hole ongoing
EX_BRESPO_09 6313 27982 657 30 -61 hole ongoing
EX_BRESPO_10 7432 30285 730 233 -75 hole ongoing
EX_BRESPO_250_01 5756 29833 250 124 -60 1310 1408 98 0.78 0.37 0.38 38.49
hole ongoing
1) Coordinates are reported in the Chelopech mine-grid.
2) AuEq is calculated using the following formula: Au g/t + 1.056 x Cu% + Mo g/t * 0.00043, based on a gold price of US$2,500 per
ounce, a copper price of US$3.85 per pound and a molybdenum price of US$15 per pound. The calculation assumes metallurgical
recoveries of 90% for all metals and is based on testing of other porphyry mineralization styles at the Chelopech Camp.
3) Significant intercepts are reported using a minimum downhole width of 20 metres, a maximum internal dilution of 10 metres at a
0.7 g/t AuEq cut-off, whilst including intervals are reported using a minimum downhole width of 10 metres, a maximum internal
dilution of 5 metres at a 1.5 g/t AuEq cut-off. No upper cuts were applied.
4) Daughter holes identified with “A” (e.g., EX_BRESPO_03A) are navigational holes with collar coordinates as of the parent hole .
5) Holes marked with (*) were partially reported in the Company`s news release from June 3, 2026, available on SEDAR+ at
www.sedarplus.ca and the Company’s website.
6) For holes identified as “in progress,” reported intervals reflect assay results received as of September 20, 2026. Drilling and/or
assay results for the remaining portions of these holes are pending.
7) Reported intercepts are downhole lengths. True widths have not been determined.
p.6 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
Preliminary metallurgical testwork results
Metallurgical testing of three Brevene Porphyry South composite samples is ongoing on three
representative composite samples at the SLR Consulting laboratory in the United Kingdom. Table 2
presents the head-assay values for the three selected composite samples, that represent the different Cu-
Au-Mo mineralization styles at the Brevene Porphyry South target.
Table 2. Geologic description and head assays
Met composite
sample ID
Geological
Description
Cu
(%)
Au
(g/t)
Mo
(g/t)
MET_BSP26_01 Potassic alteration with chlorite-anhydrite overprint
with hematite-magnetite, Pyrite>chalcopyrite 0.77 0.92 19.70
MET_BSP26_02 Potassic alteration with strong silica flooding,
dominant vein-hosted chalcopyrite-pyrite 2.08 1.67 22.85
MET_BSP26_03
Potassic alteration with phyllic and strong anhydrite
overprint; chalcopyrite-pyrite-molybdenite
disseminations and veins
1.34 0.76 195.50
Rougher grind-size optimization tests were carried out at P 80 grind sizes of 75 µm, 106 µm and 1 25 µm.
The rougher grade-recovery results indicated that the optimum grind size for copper, gold and molybdenum
was P80 75 µm. Open-cycle cleaner tests were carried out on each of the metallurgical composites at the
optimum primary grind size of P 80 75 µm, using a promoter and 3-stage cleaning (FCT1). The conditions
for FCT2 was completed at an elevated cleaner pH of 10.0 –10.5, while FCT3 included regrinding of the
combined rougher concentrate to P80 25 µm. A summary of the selected rougher stage and third-stage
cleaner concentrate testwork results are presented in table 3 below.
Table 3. Preliminary results of selected rougher and open cycle cleaner tests
Met composite
sample ID Test Stage
Mass
Pull
%
Product / Concentrate
Assay Metal Distribution, %
Cu
%
Mo
%
Au
g/t Cu Mo Au
MET_BSP26_01
Rougher - FT1 17.4 4.1 - 5.5 97.0 - 89.1
Cleaner - FCT1 7.5 8.7 - 11.9 88.1 - 85.0
Cleaner - FCT2 7.7 8.3 - Pending 90.0 - Pending
Cleaner - FCT3 6.5 10.0 - Pending 90.2 - Pending
MET_BSP26_02
Rougher - FT1 16.4 12.3 - 10.1 97.9 - 89.0
Cleaner - FCT1 8.0 21.5 - 20.6 85.7 - 83.9
Cleaner - FCT2 8.7 20.2 - Pending 87.0 - Pending
MET_BSP26_03
Rougher - FT1 12.1 10.3 0.14 5.6 98.2 88.7 86.0
Cleaner - FCT1 4.6 25.0 0.4 15.3 90.5 84.1 80.6
1) “-” indicates not assayed / not applicable.
2) “Pending” indicates assay results are pending.
p.7 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
Based on this early stage of testwork, the results indicate that Brevene Porphyry South mineralization is
amenable to conventional rougher -cleaner flotation at relatively standard grind sizes. Preliminary cleaner
testwork has produced Cu-Au concentrate grades ranging from 10.0% to 25.0% Cu and approximately 12
g/t to 20 g/t Au.
Detailed multi-element analyses of the cleaner-concentrate products are pending. However, exploration
assay data indicate that deleterious elements, such as arsenic, occur at trace levels in all three composites
and are not currently expected to reach penalty thresholds in the final concentrates.
The remainder of the current testwork program will focus on reagent optimization and improving the flotation
selectivity of chalcopyrite over pyrite , particularly for MET_BSP26_01 . The preliminary molybdenum
response from MET_BSP26_03 is encouraging, and future testwork will evaluate the potential to produce
a separate molybdenum concentrate.
Next Steps
The Company remains highly encouraged by these results, which further support the presence of a
significant porphyry system southeast of the Chelopech mine, with drilling to date indicating elevated gold
and copper grades relative to those typically associated with porphyry-style mineralization.
The latest drilling extends mineralization onto the Chelopech mine concession, further enhancing its
potential to support future mine-life extension given the target’s proximity to existing infrastructure. Based
on current data and geological interpretation, the mineralized system remains open to the north, south and
west and is open at depth, where it is interpreted to plunge slightly to the southwest.
Drilling activities within the Brevene exploration licence are planned to continue until the end of September,
at which point the exploration licence period concludes. The Company will shift drilling to the existing
Chelopech mine concession, where the latest results have confirmed the Brevene Porphyry South target
extends north onto the concession. Up to e ight high-capacity drill rigs will be dedicated to the Brevene
Porphyry South target, with approximately 15,000 additional metres of drilling is planned through the end
of 2026. This expanded program is focused on delineating the norther n and western extensions of the
porphyry system , as well as test ing the depth potential, where mineralization remains open. Further
delineation drilling will continue in 2027, to support the Company’s internal Mineral Resource estimates and
technical evaluations.
In addition, scout drilling is also continuing on the Chelopech mine concession, with two underground drill
rigs targeting additional telescoped high-sulphidation mineralization similar to the Wedge Zone , which
remains a high -priority for the Company given the Wedge Zone’s life of mine and near -term production
potential within the Chelopech mining camp. Refer to the Company’s news release dated May 2 0, 2026,
for additional information regarding the Wedge Zone Deep discovery.
In parallel with the drilling program, the Company continues to advance activities in support of converting
the Brevene exploration licence to a mining concession. In late August, the final geology report , which
includes technical and economic assessment, was submitted to the Ministry of Energy , with regulatory
review ongoing.
p.8 DPM Metals Expands Brevene Porphyry South Discovery with New High-Grade Intercepts
The key milestones in this regulatory process include recognition of a Commercial Discovery; submission
of a mining concession application; environmental and other permitting requirements; and ultimately,
granting of a concession contract, all of which is subject to regulatory review and approval. As the Company
advances through this regulatory process, DPM’s near-term exploration updates regarding the Chelopech
camp will be focused on results from within the mine concession area, with f urther Brevene exploration
results to resume once the regulatory milestones are achieved.