Orosur Mining Inc - Anzá Activity Accelerating
`
Anzá Activity Accelerating
· Commencement of drilling at El Cedro
· Increase in Project size
· Further drill results from Pepas West and APTA
· Auger drilling at Pepas West
London, September 2nd, 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" or the "Project").
Anzá - Colombia
The Anzá Project in Colombia comprises a number of granted exploration titles and applications roughly 530km2, within the Mid-Cauca gold belt, west of Medellín.
These titles and applications are owned 100% by two Colombian companies, Minera Anzá, and Minera Monte Aguila, both wholly owned subsidiaries of the Company.
Since acquiring 100% control of the Project, the Company has focussed its attention on three prospects:
· Pepas - a shallow, high-grade deposit of gold mineralisation for which the Company has calculated a Mineral Resource Estimate ("MRE"), announced February 10th 2026.
· APTA - a high-grade deposit of gold mineralisation that has to date seen approximately 40,000m of drilling since 2012, with drilling ongoing.
· El Cedro - a cluster of gold/copper porphyry intrusions in the south of the Project area at which drilling has just commenced.
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. An extensive area of anomalous soil geochemistry was delineated, as well as channel samples and rock chip samples with assays up to 10g/t Au and 2% Cu.
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, the Company undertook larger scale surface geochemical surveys during 2025 and early 2026, focussing on identifying structures and epithermal features proximal to the intrusions that could have the potential for higher grade metal accumulations.
Following an extensive period of permitting, socialisation and logistical planning, the first drilling campaign ever undertaken at El Cedro, began in late August 2026, initially targeting the eastern flank of the northern intrusion and the bounding structures and veins.
Figure 2. El Cedro location
Drilling has only just begun, however a porphyry intrusion was immediately intersected, demonstrating attractive stockwork veining, silicification and potassic alternation. This first hole, CED001, is planned to reach a depth of 500m which is expected to take roughly five weeks to complete.
Figure 3. El Cedro core
Project Size
Several new licence applications have recently been submitted, taking the total under application to 360km2. When combined with 170km2 of granted titles, the total Project area is now approximately 530km2.
Several of these new applications lie within forest reserve, or along the banks of the Cauca River and have been made for strategic reasons including to secure the Company's position along the main access road.
Pepas West
The Company's primary focus since reassuming control of the Project in late 2024, was to explore the immediate area of Pepas, ultimately leading to the publication of a maiden MRE for the Pepas gold deposit on February 10th, 2026.
Following completion of the MRE drillout in late 2025, the Company then embarked on a semi-regional drilling program around the Pepas deposit. The objective of this drilling program was to better understand the larger scale litho-structural controls that led to formation of the Pepas deposit, such that, in combination with additional mapping and sampling in the wider region, vectors toward additional mineralisation might be developed and ounces added to inventory.
The Company achieved immediate success with a new zone of shallow mineralisation being identified roughly 100m to the west of Pepas - with first results announced on April 14th, 2026.
Latest drilling at Pepas West (PEP106 and PEP107) have continued to define this zone with the picture now emerging of a surficial, heavily oxidised and possibly remobilised zone of medium grade mineralisation.
Hole Number
From (m)
To (m)
Interval (m)
Au (g/t)
PEP106
0
19.45
19.45
1.02
including
0
2.25
2.25
3.11
Including
11.1
12.2
1.1
3.09
PEP107
0
7.6
7.6
0.47
MAP108
134.8
213.75
78.95
0.38
Table 1. Latest drill Intercepts, Pepas West and APTA
Figure 4. Plan of holes, Pepas West
Figure 5. Section, PEP106, PEP107
Figure 6. Long Section, Pepas West
The Company is of the view that Pepas West is worthy of follow up, however the geometry of the zone (surficial, thin and broad) would likely require a large number of shallow holes, a situation that is not well suited to traditional diamond drilling as too much time would be lost in rig moves. As a result, the diamond rig that has been at Pepas since late 2024, has been relocated to other prospects in the immediate vicinity while geological teams trial the application of an auger system to rapidly take samples of unconsolidated material down to a depth of roughly 10m.
A trial sampling program has been designed (Figure 7.) the results of which, when completed, will be assessed to determine if this methodology has the potential to move Pepas to Resource status.
Figure 7. Auger trial plan
In addition, subject to results, the auger system may then be employed on a wider scale around Pepas to explore for similar shallow mineralisation that may perhaps be hidden beneath a thin veneer of barren transported cover.
APTA
The APTA prospect in the centre of the Project area has over 40,000m of drilling by various companies since 2012. This work has identified a substantial epithermal gold system.
The current drill plan at APTA is designed to better understand the geological controls upon the previously defined high-grade mineralisation that may then assist in planning a future resource drill out program if results warrant.
The latest hole, MAP108, was drilled off section from the previous hole and intersected a broad interval of low-grade mineralisation and has provided valuable insight into the delineating structures that control higher grades.
Figure 8. APTA Plan
Drilling is currently focussed on understanding the shallower reaches of the APTA deposit which have thus far seen little further exploration.
Figure 9. APTA drill section
Orosur CEO Brad George commented:
"The Anza project is now ramping up with three rigs running, one at each of Pepas, APTA and El Cedro and planned to remain for some time. More prospects are also being advanced to the drill stage, demonstrating the extraordinary potential of this licence holding."
For further information, visit www.orosur.ca, follow on X @orosurm or please contact:
Orosur Mining Inc
Louis Castro, Chairman,
Brad George, CEO
info@orosur.ca
Tel: +1 (778) 373-0100
SP Angel Corporate Finance LLP - Nomad & Joint Broker
Jen Clarke / Caroline Rowe / 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
Alison Allfrey
Fergus Mellonorosur@flagstaffcomms.com
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 (Withdrawal) 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.
Drill Hole Details - Pepas prospect 2022/2026 Programme*
Hole ID
Easting (m)
Northing (m)
Elevation asl (m)
Dip (°)
Azimuth (°)
PEP-001
403384
705000
1001
-50
150
PEP-002
403384
705000
1001
-60
290
PEP-003
403240
705142
1001
-49.60
95.2
PEP-004
403508
705671
838
-59.8
99.8
PEP-005
403373
704990
1008
-49.8
94.6
PEP-007
403374
704990
1008
-69.9
170
PEP-008
403232
704803
971
-50
60
PEP-009
403032
705057
1055
-50
80
PEP-010
403375
705106
982
-50.31
190.4
PEP-011
403573
704939
1001
-50.3
255
PEP-012
403415
704890
997
-56
352
PEP-013
403413
704887
997
-50
43
PEP-014
403400
704910
1007
-50
43
PEP-015
403375
704938
1017
-50
43
PEP-016
403326
704912
999
-50
43
PEP-017
403365
704848
976
-40
47
PEP-018
403345
704851
977
-45
43
PEP-019
403446
704890
991
-45
43
PEP-020
403446
704890
991
-75
43
PEP-021
403424
704935
1012
-62
223
PEP-022
403424
704935
1012
-42
223
PEP-023
403245
704927
969
-50
43
PEP-024
403245
704927
969
-78
43
PEP-025
403369
704888
1001
-45
43
PEP-026
403339
704955
1008
-63
50
PEP-027
403468
704909
1003
-46
228
PEP-028
403398
704957
1012
-58
223
PEP-029
403311
705018
1011
-50
50
PEP-030
403311
705018
1011
-50
000
PEP-031B
403486
704901
998
-52
220
PEP-032
403431
704861
982
-60
15
PEP-033
403431
704861
982
-65
100
PEP-034
403431
704861
982
-45
315
PEP-035
403369
704882
996
-45
223
PEP-036
403311
705152
989
-45
30
PEP-037
403354
705227
958
-50
210
PEP-038
403332
705219
967
-45
128
PEP-039
403411
704798
957
-45
73
PEP-040
403369
704882
995
-80
212
PEP-041
403373
704936
1008
-50
3
PEP-042
403396
705038
716
-50
82
PEP-043
403298
704942
981
-50
43
PEP-044
403402
704948
1011
-62
33
PEP-045
403406
704949
1011
-60
223
PEP-046
403420
704933
1007
-53
43
PEP-047
403414
704927
1008
-74
223
PEP-048
403448
704922
1005
-54
043
PEP-049
403447
704920
1005
-55
223
PEP-050
403459
704905
1003
-45
43
PEP-051
403391
704928
1011
-61
43
PEP-052
403391
704928
1011
-87
43
PEP-053
403391
704929
1012
-60
223
PEP-054
403380
704954
1011
-52
43
PEP-055
403380
704954
1011
-86
223
PEP-056
403371
704970
1012
-61
43
PEP-057
403371
704970
1012
-71
223
PEP-058
403371
704970
1012
-85
223
PEP-059
403384
704976
1007
-59
43
PEP-060
403372
704908
1005
-55
43
PEP-061
403361
704988
1010
-80
223
PEP-062
403361
704988
1010
-61
43
PEP-063
403345
705005
1009
-50
80
PEP-064
403356
704923
1005
-51
43
PEP-065
403359
704949
1008
-59
43
PEP-065B
403359
704949
1008
-50
43
PEP-066
403423
704938
1009
-64
223
PEP-067
403400
704870
990
-53
43
PEP-068
403342
704989
1010
-56
43
PEP-069
403342
704987
1010
-80
218
PEP-070
403260
705071
1013
-50
30
PEP-071
403333
705005
1009
-51
90
PEP-072B
403435
704879
989
-70
43
PEP-073
403423
704917
1006
-50
307
PEP-074
403423
704917
1006
-60
127
PEP-075
403240
705267
946
-50
221
PEP-076
403240
705267
946
-60
042
PEP-077
403304
705228
959
-60
042
PEP-078
403304
705228
959
-60
222
PEP-079
403304
705228
959
-50
120
PEP-080
403093
705100
1026
-50
042
PEP-081
403215
705006
984
-55
032
PEP-082
403261
704941
977
-58
190
PEP-083
403267
704913
972
-45
342
PEP-084
403267
704913
972
-50
125
PEP-085
403267
704913
972
-50
310
PEP-086
403272
704910
979
-55
310
PEP-087
403262
704941
977
-50
260
PEP-088
403252
704946
979
-50
202
PEP-089
403252
704946
979
-50
202
PEP-090
403238
704980
976
-45
200
PEP-091
403390
704583
959
-45
110
PEP-092
403390
704583
959
-50
270
PEP-093
403351
704530
946
-45
123
PEP-094
403351
704530
946
-45
30
PEP-095
403215
705006
984
-55
205
PEP-096
403215
705006
984
-45
245
PEP-097
403215
705006
985
-50
178
PEP-098
403210
704940
965
-45
037
PEP-099
403210
704940
965
-62
037
PEP-100
403210
704940
965
-45
082
PEP-101
403274
704916
973
-55
035
PEP-102
403343
704863
985
-60
188
PEP-103
403343
704863
985
-50
08
PEP-104
403347
704897
998
-50
220
PEP-105
403347
704897
998
-75
040
PEP-106
403325
704908
992
-50
220
PEP-107
403325
704908
992
-75
220
PEP-108
403842
704863
982
-55
352
PEP-109
Drill Hole Details - APTA prospect *
Hole ID
Easting (m)
Northing (m)
Elevation asl (m)
Dip (°)
Azimuth (°)
MAP-072
400088
694745
1075
-55
293
MAP-073
400018
694503
1097
-58
295
MAP-074
399981
694684
1110
-58
295
MAP-075
400168
694723
1024
-55
295
MAP-076
400019
694527
1107
-50
295
MAP-077
400168
694723
1024
-69
295
MAP-078
399917
694719
1112
-50
295
MAP-079
399995
693976
960
-55
295
MAP-080
400231
694580
966
-55
295
MAP-081
400045
693950
920
-55
295
MAP-082
400176
694797
1020
-50
296
MAP-083
400176
694797
1020
-60
310
MAP-084
400045
693950
920
-57
321
MAP-085
400167
694552
1000
-46
247
MAP-086
400067
694360
1068
-54
295
MAP-087
400027
694168
988
-54
290
MAP-088
400168
694723
1024
-55
341
MAP-089
400067
694360
1068
-59
317
MAP-090
400041
694630
1059
-56
296
MAP-091
400060
694715
1089
-50
295
MAP-092
399420
695235
1162
-50
138
MAP-093
400055
694203
1006
-59
290
MAP-094
399954
694347
1031
-64
303
MAP-095
399722
695252
1113
-50
135
MAP-096
399759
694632
1082
-57
127
MAP-097
400054
694472
1087
-71
311
MAP-098
399794
694730
1149
-65
130
MAP-099
399098
695129
1157
-50
250
MAP-100
400096
694431
1051
-59
283
MAP-101
400286
694890
967
-50
331
MAP-102
400095
694426
990
-61.5
303.5
MAP-103
399793
694730
1162
-65.5
123.3
MAP-104
399982
694294
1015
-60
297
MAP-105
399793
694730
1162
-63.8
113.3
MAP-106A
399758
694913
1142
-49
120
MAP-107
399808
694864
1128
-60
109
MAP108
399922
694779
1098
-76
298
*Coordinates WGS84, UTM Zone 18
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.
Drill core is split in half over widths that vary between 0.3m and 2m, depending upon the geological domain. One half is kept on site in the Minera Anzá core storage facility in the case of the Anza Project, or on site in temporary racks in the case of the El Pantano Project, with the other sent for assay.
Industry standard QAQC protocols are put in place with approximately 10% of total submitted samples being blanks, repeats or Certified Reference Materials (CRMs).
Samples for holes PEP-001 to PEP-011 were sent to the Medellin preparation facility of ALS Colombia Ltd, and then to the ISO 9001 certified ALS Chemex laboratory in Lima, Peru.
Samples from PEP-012 and MAP-106 onwards are sent to Medellin laboratory of Actlabs for preparation and fire assay, with some sample then sent to the Canadian Actlabs facility for multi element assay
30 gram nominal weight samples are then subject to fire assay and AAS analysis for gold with gravimetric re-finish for overlimit assays of >5 g/t. ICP-MS Ultra-Trace level multi-element four-acid digest analyses may also undertaken for such elements as silver, copper, lead and zinc, etc.
Gold intersections are reported using a lower cut-off of 0.3g/t Au over 3m.
Intersections are quoted as downhole thicknesses. True thicknesses are unknown.
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 States 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 uncertainty 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.
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