Orosur Mining Inc. – Colombia update
Orosur Mining Inc. – Colombia update
• Assays from five additional holes – MAP-101 to 105.
• Results generally reflect lower levels of gold anomalism but high-grade zinc
and copper evident at depth, beyond the capacity of the existing rig fleet.
• Focus shifted to northern prospects - two rigs drilling at Pepas and one at
Pupino with another rig being mobilised.
• First assay results from Pepas expected in July.
London, June 27th, 2022. Orosur Mining Inc. (“Orosur” or the “Company”) (TSX/AIM:OMI), is
pleased to announce an update on the progress of exploration activities at the Company’s flagship
Anzá project in Colombia.
Exploration work at Anzá is under the operational control of the Company’s Joint Venture partner,
Minera Monte Águila SAS (“Monte Águila”). Monte Águila is a 50/50 joint venture between
Newmont Corporation (“Newmont”) (NYSE:NEM, TSX:NEM) and Agnico Eagle Mines Limited
(“Agnico”) ( NYSE:AEM, TSX:AEM) and is the vehicle by which these two companies jointly
exercise their rights and obligations with respect to the Exploration Agreement with Venture
Option (“Exploration Agreement”) over the Anzá Project.
Assay results from the final five holes drilled at the APTA prospect have been received. In general,
the results reflect lower levels of gold anomalism compared to previously drilled holes, but show
some high-grade base metal results, similar to intersections from previous drilling, adding support
to the theory of hybrid volcanogenic massive sulphide (VMS)/intermediate-sulfidation epithermal
system.
While few significant gold intercepts were recorded, this was not wholly unexpected as these
holes were drilled to better define the geological and structural context of the APTA environment
whilst the Company awaited mapping, sampling, geophysics and land access to be finalised on
the northern prospects.
These results would suggest that while APTA remains a highly prospective target, with multiple
thick and high-grade intersections having been previously recorded, it is also complex and has
substantial depth extent that is beyond the capacity of the current drill rig fleet to test.
As previously announced on April 25th, 2022, drilling ceased at APTA in late March with the
remaining Colombian rig being mobilised to the Pepas prospect at the far northern extent of the
project area. The focus of the scout drilling program in the NE of the project area is to test several
anomalous targets identified through surface mapping and sampling, geophysics, and
geochemistry – it is planned to have four rigs operating in this area, with two each at Pepas and
Pupino.
Assay Results
Assay results from the final five holes drilled at APTA have been received from the ALS laboratory
in Lima, Peru (MAP-101 to 105). Key intersections from these holes are noted below:
MAP-102 4.85m @ 0.51g/t Au, 1.24g/t 0.16% Zn
MAP-103 0.75m @ 3.30g/t Au, 0.86g/t Ag, 0.14% Zn
0.95m @ 4.90g/t Au, 3.49g/t Ag, 3.39% Zn
MAP-104 5.35m @ 2.62g/t Au, 2.61g/t Ag, 1.04% Zn
0.50m @ 22.80g/t Au, 13.95g/t Ag, 0.52%Zn
MAP-105 2.50m @ 3.30g/t Au, 1.61g/t Ag, 0.06% Zn
9.25m @ 1.77g/t Au, 4.63 g/t Ag, 5.33% Zn
9.70m @ 0.17g/t Au, 2.59 g/t Ag, 13.88% Zn, 0.91% Cu
Full results from these holes are noted below.
Hole
Number
From
(m)
To
(m)
Interval
(m)
Au
(g/t)
Ag
(g/t)
Zn
(%)
Cu
(%)
MAP101 No significant results
MAP102 219.60 221.00 1.40 0.46 6.81 0.10 0.01
MAP102 243.05 247.90 4.85 0.51 1.24 0.16 0.02
MAP102 289.75 341.95 52.20 0.23 1.69 0.04 0.01
MAP103 205.90 216.35 10.45 0.49 0.48 0.03 -
including 214.95 215.70 0.75 3.30 0.86 0.14 -
MAP103 258.95 283.65 24.70 0.37 11.76 0.32 0.03
including 258.95 260.70 1.75 0.83 15.33 1.48 0.08
including 264.10 264.75 0.65 0.27 10.75 2.28 0.47
including 266.20 268.35 2.15 0.92 43.14 0.44 0.02
MAP103 302.60 303.55 0.95 4.90 3.49 3.39 0.17
MAP103 328.80 335.15 6.35 0.50 0.45 0.15 -
including 329.50 330.35 0.85 1.47 0.94 0.34 0.02
MAP103 581.10 584.10 3.00 0.34 2.90 3.92 0.45
including 581.60 583.05 1.45 0.55 4.62 6.63 0.55
MAP103 637.95 658.80 20.85 0.42 4.63 0.07 0.01
including 651.20 651.90 0.70 1.40 12.15 0.10 0.01
MAP104 75.00 93.20 18.20 0.55 2.34 0.21 0.02
including 83.00 83.70 0.70 2.86 3.51 0.02 -
including 89.10 90.05 0.95 2.11 6.89 1.08 0.12
MAP104 188.90 194.25 5.35 2.67 2.61 1.04 0.04
including 188.90 190.45 1.55 8.37 5.61 0.20 0.03
including 188.90 189.40 0.50 22.80 13.95 0.52 0.07
including 192.55 194.25 1.70 0.39 2.28 3.10 0.10
MAP105 278.70 281.20 2.50 3.30 1.61 0.06 -
including 278.70 279.80 1.10 5.97 2.42 0.02 -
MAP105 305.25 314.50 9.25 1.77 4.63 5.33 0.39
including 309.55 310.70 1.15 3.14 4.18 4.56 0.72
including 312.65 314.50 1.85 2.73 5.63 10.91 0.70
including 312.65 313.60 0.95 4.41 5.55 11.43 0.96
MAP105 320.35 327.70 7.35 0.32 8.53 6.17 0.82
including 323.70 324.75 1.05 0.34 23.45 16.53 2.29
MAP105 475.40 485.10 9.70 0.17 2.59 13.88 0.91
including 478.85 484.80 5.95 0.15 3.58 18.04 1.40
Table 1. Drill Intercepts.
Figure 1. Plan of last five holes
Figure 2. Plan, all holes since 2020
MAP-101
MAP-101 was drilled well to the north of all previous drilling an d angled away to a NW azimuth.
The primary objective of the hole was to intersect and thus confirm the location of the northward
continuation of the Aragon fault.
The hole was successful in these objectives, but no substantial mineralisation was intersected.
MAP-102
MAP-102 was drilled to test the northern extension of higher-grade mineralisation previously
intersected in hole MAP-089. While substantial widths of mineralisation were intersected, these
were of lower grade, and somewhat similar to the nearby hole MAP-097.
Figure 3. Section MAP-102
MAP-104
MAP-104 was drilled into a gap between the previously defined north and south sections of the
APTA zone. This is a zone where the primary structures change direction and thus it was
necessary to better define this section.
Some narrow high-grade gold and base metal veins were intersected.
Figure 4. Section MAP-104
MAP-103,105
MAP-103 and 105 were drilled to test the continuity of mineralisation previously intersected in
MAP-098, but also to push downward to test stratigraphy to the limit of the available rigs. Both
holes were drilled from the west, and so designed more as stratigraphic holes.
Reasonable intersections of gold mineralisation were intersected, however of most interest was
the intersection in MAP-105 of a likely VMS system at depth with high grade zinc and copper
mineralisation, including 5.95m @ 18% Zn and 1.4% Cu from 478m.
Figure 5. Section MAP-103 & MAP-105
Other Drilling
As previously announced on April 25th, 2022, drilling activities ceased at APTA in March, with the
remaining rig mobilised to the northern Pepas prospect.
Extensive programs of mapping, sampling and geophysics had been undertaken along the
northern extent of the Aragon fault and associated structures over previous months, with highly
anomalous geochemical and geophysical responses being recorded. Access to the area however
was challenging due to terrain issues and substantial logistical infrastructure and support was
required to be developed before rigs could be mobilised.
Drilling commenced at Pepas with one rig in April, with a second rig mobilised to Pepas in recent
weeks. The Company is also informed that a third rig has commenced drilling at Pupino, with a
fourth in the process of being mobilised to commence at Pupino in the near term.
Core from the first hole at Pupino have been submitted to the laboratory for assay and results are
expected soon.
Orosur CEO Brad George commented:
“This last batch of holes were largely focused on resolving stratigraphic and structural issues at
APTA, while waiting for permitting and access to be developed at the highly prospective northern
prospects of Pepas and Pupino. APTA has been the focus of atten tion for Waymar, Orosur and
Monte Águila since 2012 with the remaining 20km of strike of the Aragon Fault tantalisingly out of
reach. APTA proved the region is fertile, and field mapping in the north suggested this could
continue, but it was only in April that we were finally able to move rigs onto these targets. We
await with some anticipation the results of recent drilling at Pepas and Pupino and look forward
to updating shareholders shortly.”
For further information visit www.orosur.ca, follow on twitter @orosurm or contact:
Orosur Mining Inc.
Louis Castro, Chairman
Brad George, CEO
Tel:+1 (778) 373-0100
SP Angel Corporate Finance LLP – Nomad & Joint Broker
Jeff Keating / Caroline Rowe
Tel: +44 (0) 20 3 470 0470
Turner Pope Investments (TPI) Ltd – Joint Broker
Andy Thacker
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 (Withdrawal) Act 2018. Upon the publication of t his
announcement via Regulatory Information Service ('RIS'), this inside is now considered to be in the public
domain.
Drill Hole Details – 2020/2021 Programme*
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 -64 113
* Coordinates WGS84, UTM Zone 18
About Orosur Mining Inc.
Orosur Mining Inc. (TSX -V: OMI; AIM: OMI) is a minerals explorer and developer focused on identifying
and advancing projects in South America. The Company currently operates in Colombia, Brazil, Argentina
and Uruguay.
About the Anzá Project
Anzá is a gold exploration project, comprising three exploration licences, four exploration licence
applications, and several small exploitation permits, totalling 207.5km 2 in the prolific Mid -Cauca belt of
Colombia.
The Anzá Project is currently wholly owned by Orosur via its subsidiary, Minera Anzá S.A.
The project is located 50km west of Medellin and is easily accessible by all -weather roads and boasts
excellent infrastructure including water, power, communications and large exploration camp.
The Anzá Project is subject to an Exploration Agreement with Venture Option dated September 7 th, 2018,
as announced on September 10 th, 2018, between Orosur’s 100% subsidiary Minera Anz á S.A (“Minera
Anzá”) and Minera Monte Águila SAS (“Monte Águila”), a 50/50 joint venture between Newmont Corporation
(“Newmont”) (NYSE:NEM, TSX:NGT), and Agnico Eagle Mines Limited (“Agnico”) (NYSE:AEM, TSX:AEM).
Qualified Persons Statement
The information in this news release was compiled, reviewed and verified 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 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, with the other sent for assay.
Industry standard QAQC protocols are put in place with approximately 20% of total submitted samples
being blanks, repeats or Certified Reference Materials (CRMs).
Samples are sent to the Medellin preparation facility of ALS Colombia Ltd, and then to the ISO 9001 certified