Orla Mining Discovers New Style of Sulphide Mineralization at Camino Rojo Extending 0.5km Beyond Current Resources
4.86 g/t Au, 43.6g/t Ag, 1.27% Zn, 0.44% Pb, 0.09% Cu, (6.25 g/t AuEq) over 11.7 m,
incl. 28.6 g/t Au, 224g/t Ag, 4.35% Zn, 2.89% Pb, 0.29% Cu, (34.4 g/t AuEq) over 1.7 m
10.3 g/t Au, 37.8 g/t Ag, 3.81% Zn, 0.08% Pb, 0.12% Cu (12.7 g/t AuEq) over 5.6 m,
incl. 17.8 g/t Au, 71.0 g/t Ag, 7.19% Zn, 0.15% Pb, 0.17% Cu (22.3 g/t AuEq) over 2.9 m
Historical and recent exploration drilling targeted lower stratigraphy, beneath the existing resources. In 2023, a drill section was completed 450 metres down-plunge from the current mineral resources and revealed significant intersections of high-grade polymetallic (Au-Ag-Zn) semi-massive to massive replacement-style mineralization (Figure 1). Recent drilling shows that the Camino Rojo mineral system extends beyond the current mineral resource envelope, presenting a considerable opportunity for resource expansion.
- 2023 Program: The 2023 Camino Rojo Extension drill program involved extending selected infill drillholes beyond the currently defined mineral resources and completing a down-plunge drill section to explore the distal extension into lower stratigraphy; 2,607 metres of drilling across four drill holes. Drill results reported in this press release have returned mineralized intercepts up to 450 metres down plunge of the existing open pit mineral resource boundaries.
- Initial Metallurgy: The initial carbon-in-leach (CIL) bottle roll testing within the Camino Rojo Extension on material from CRSX-22-07 and CRSX-22-08C resulted in impressive gold recoveries between 81-96%. Flotation testing on the CRSX-22-07 material produced a gold concentrate with 85-88% gold recovery and a zinc concentrate with zinc grades of 52% and over 85% zinc recovery, for the polymetallic replacement-style mineralization.
-
2024 Program: The Company plans to complete a 30,000-metre drill program in 2024 with two objectives: 1) to infill the down-plunge geometry, continuity, and endowment potential of mineralization along the projection of the
Dike Zone , and 2) to step out broadly and further assess the extensive upside potential of this open mineralized system.
"The recent drilling results have added a new dimension to our near-mine exploration program, unveiling an exciting new mineralization style in previously disregarded host rocks. With promising initial metallurgical results and substantial upside extension potential, we are committed to driving Orla's 2024 exploration efforts towards expansion drilling as we look to unlock the full potential of the growing
-
New polymetallic sulphide replacement style mineralization
The impressive intercepts, both historical and recent, justified the execution of a new drill section in 2023, targeting 450 metres down-plunge from the existing resources, along the dike zone structure (Figures 2-4). This significant step-out drilling initiative consisted of drilling 2,400 metres, targeting the area around the positive historical intercept in hole CR12-366D (15.7 g/t Au, 29.0 g/t Ag, 0.73% Zn, 0.10 % Pb, 0.08% Cu (19.6 g/t AuEq) over 4.5 metres. This new drill section confirmed the presence of significant polymetallic semi-massive to massive sulphide mineralization (Figure 4). Significant results from this drill section are shown in Table 1.
Table 1: Camino Rojo Extension Significant Intersections
HOLE-ID |
From |
Core |
Au |
Ag |
Zn |
Pb |
Cu |
AuEq |
CRSX23-22A |
1047.9 |
11.9 |
2.48 |
34.2 |
1.34 |
0.16 |
0.09 |
3.70 |
incl. |
1058.1 |
1.7 |
8.23 |
125.0 |
8.32 |
0.91 |
0.28 |
14.35 |
and |
1066.4 |
5.6 |
10.30 |
37.8 |
3.81 |
0.08 |
0.12 |
12.73 |
incl. |
1066.4 |
2.8 |
17.82 |
71.0 |
7.19 |
0.15 |
0.17 |
22.34 |
CRSX23-22C |
1044.9 |
11.7 |
4.86 |
43.6 |
1.27 |
0.44 |
0.08 |
6.25 |
incl. |
1044.9 |
1.7 |
28.60 |
224.0 |
4.35 |
2.89 |
0.29 |
34.75 |
and |
1063.6 |
4.4 |
3.02 |
27.0 |
1.28 |
0.03 |
0.10 |
4.10 |
incl. |
1066.5 |
1.5 |
6.50 |
19.5 |
2.92 |
0.02 |
0.07 |
8.20 |
Metal prices used in gold equivalent calculation: Au = |
Positive Initial Metallurgical Results
Orla completed an initial metallurgical testing program in 2023, using drill core material from holes CRSX22-07 and CRSX22-08C (see Table 2) which intersected polymetallic replacement-style mineralization during the 2022 program. The metallurgical results on material from CRSX-22-07 and CRSX-22-08C were positive with high gold recovery reported in both CIL bottle roll tests between 81-96% and rougher flotation on the CRSX-22-07 material produced a gold concentrate with 85-88% gold recovery. Open-circuit zinc cleaner tests on material from CRSX-22-07 produced a zinc concentrate with zinc grades of 52% and over 85% zinc recovery. These results suggest this new style of mineralization may be amenable to both standard cyanide processing and flotation. Orla plans to further explore these promising results through additional metallurgical test work in 2024.
Background
Historical context: Wide-spaced drill intersections of polymetallic (Au-Ag-Zn) replacement-style mineralization were encountered in historical holes beneath the Caracol formation, but the relationship between these intersections and the Camino Rojo sulphides deposit was uncertain, partly due to the lack of a comprehensive geological model for the deeper part of the mineralized system.
2022 program: Part of the 2022 infill program targeted deeper parts of the mineral resource hosted within the upper Indidura formation. This drilling intersecting polymetallic (Au-Ag-Zn) mineralization, similar to the wide-spaced historical intercepts, up to 50 metres below the contact between Caracol and Indidura formations. These results provided confidence that the mineralized system likely continued lower.
2024 Drill Program
The 2024 Camino Rojo Extension drill program commenced on
Full drill results are available in the Appendix to this news release and are available at www.orlamining.com.
All metres reported above are down-hole intervals, with true width estimates ranging from 72-88% of the reported interval. See Table 1 in the Appendix to this news release for estimated true widths of individual composites. A standard sampling length of 1.5m is used with a minimum of 0.5m when required based on geologic contacts. All drill core is HQ diameter. The reported composites were not subject to "capping," however a preliminary analysis suggests that only 1 out of 972 samples from the reported holes exceeded the potential capping level of 27.0 g/t Au. This sample assayed 28.6 g/t Au. Orla believes that applying a top cut would have a negligible effect on overall grades. Composites for the sulphide drilling were calculated using 1 g/t Au cut-off grade and maximum 6 metres consecutive waste. |
Photo 1: CRSX23-22A, 1068.0 m, HQ core. Chalcopyrite – pyrite – pyrrhotite – sphalerite massive sulphide replacement mineralization (manto-type), hosted in limestone of Cuesta
Photo 2: CRSX23-22C, 1066.8 m, HQ core. Arsenopyrite - pyrrhotite - pyrite – sphalerite massive sulphide replacement mineralization (manto-type) with euhedral crystals of sphalerite, hosted in limestone of Cuesta
Photo 3: CRSX23-22C, 1045.4 m, HQ core. Coarse grained galena - pyrrhotite – pyrite – arsenopyrite – sphalerite massive sulphide mineralization, hosted in limestone of Cuesta
Table 2: Previously reported and historical intercepts,
HOLE-ID |
From |
Core |
Au |
Ag |
Zn |
Pb |
Cu |
AuEq |
Orla Previously Reported Significant Results from Lower Stratigraphy |
||||||||
CRSX22-07 |
777.6 |
22.9 |
4.02 |
12.2 |
1.52 |
0.02 |
0.04 |
4.95 |
incl. |
777.6 |
6.0 |
9.30 |
18.8 |
3.44 |
0.05 |
0.05 |
11.23 |
CRSX22-08C |
858.4 |
9.1 |
2.50 |
8.2 |
0.94 |
0.01 |
0.05 |
3.11 |
CRSX23-20B |
834.0 |
11.5 |
4.08 |
35.8 |
0.18 |
0.02 |
0.09 |
4.73 |
CRSX23-20F |
1062.8 |
5.2 |
2.69 |
10.0 |
3.88 |
0.03 |
0.04 |
4.70 |
CRSX23-25C |
922.4 |
0.5 |
13.30 |
21.3 |
12.95 |
0.02 |
0.09 |
19.78 |
CRSX23-25C |
949.1 |
2.0 |
9.20 |
13.0 |
2.99 |
0.01 |
0.03 |
10.81 |
|
||||||||
CRSX23-15C |
965.5 |
8.5 |
3.52 |
26.2 |
3.64 |
0.02 |
0.26 |
5.91 |
and |
994.5 |
3.3 |
4.54 |
6.7 |
5.49 |
0.01 |
0.06 |
7.28 |
incl. |
995.4 |
1.2 |
8.00 |
7.6 |
12.50 |
0.01 |
0.11 |
14.13 |
and |
1048.5 |
1.5 |
15.35 |
6.7 |
4.39 |
0.00 |
0.04 |
17.55 |
Historical Hole CR12-366D Drilled on same section than Holes CRSX-23-22, A, B, C |
||||||||
CR12-366D |
1122.0 |
46.5 |
4.04 |
33.5 |
1.27 |
0.05 |
0.14 |
5.25 |
incl. |
1122.0 |
27.0 |
6.26 |
42.6 |
2.05 |
0.07 |
0.11 |
7.91 |
and incl. |
1122.0 |
4.5 |
15.65 |
29.0 |
7.30 |
0.10 |
0.08 |
19.58 |
and incl. |
1128.0 |
1.5 |
31.50 |
94.0 |
6.55 |
0.13 |
0.10 |
35.89 |
Other Selected Historical Intersection Highlights |
||||||||
CR13-451D |
941.0 |
16.5 |
3.01 |
8.6 |
0.82 |
0.01 |
0.04 |
3.55 |
CR13-455D |
956.0 |
21.0 |
6.12 |
7.4 |
0.05 |
0.02 |
0.08 |
6.35 |
CR14-579D |
1081.5 |
10.5 |
18.83 |
6.6 |
6.02 |
0.01 |
0.06 |
21.82 |
CR13-454D |
723.5 |
51.0 |
2.11 |
11.8 |
0.39 |
0.03 |
0.04 |
2.50 |
incl. |
770.0 |
4.5 |
6.72 |
2.6 |
0.06 |
0.00 |
0.02 |
6.81 |
CRD-021A |
865.5 |
4.5 |
10.70 |
2.7 |
0.02 |
0.00 |
0.01 |
10.75 |
incl. |
915.0 |
1.5 |
##### |
54.0 |
0.00 |
0.06 |
0.02 |
104.70 |
CR13-507DB |
756.5 |
55.5 |
3.08 |
7.4 |
0.22 |
0.02 |
0.03 |
3.32 |
incl. |
789.5 |
16.5 |
7.05 |
1.8 |
0.21 |
0.02 |
0.02 |
7.25 |
CR13-453D |
855.5 |
27.0 |
3.62 |
9.2 |
0.28 |
0.04 |
0.03 |
3.91 |
incl. |
878.0 |
4.5 |
11.19 |
28.0 |
0.66 |
0.16 |
0.06 |
11.98 |
and |
894.5 |
33.0 |
1.84 |
30.8 |
0.11 |
0.01 |
0.08 |
2.38 |
incl. |
911.0 |
1.5 |
9.00 |
421.0 |
0.13 |
0.09 |
0.17 |
14.38 |
CR14-597DG |
724.5 |
25.5 |
3.68 |
33.6 |
0.30 |
0.70 |
0.02 |
4.49 |
incl. |
744.0 |
6.0 |
11.49 |
14.6 |
0.47 |
0.03 |
0.03 |
11.94 |
Trace indicates base metal assay results are less than 0.01%. |
Metal prices used in gold equivalent calculation: Au = |
The scientific and technical information in this news release has been reviewed and approved by Mr.
To verify the information related to the 2022 and 2023 drilling programs at the Camino Rojo property,
All gold results at Camino Rojo were obtained by ALS Minerals (Au-AA23) using fire assay fusion and an atomic absorption spectroscopy finish. All samples are also analyzed for multi-elements, including silver, copper, lead and zinc using a four-acid digestion with ICP-AES finish (ME-ICP61) method at
The initial metallurgical testing on the Camino Rojo Extension was completed by
For additional information on the Company's previously reported drill results, see the Company's press release dated
Orla is operating the
Forward-looking Statements
This news release contains certain "forward-looking information" and "forward-looking statements" within the meaning of Canadian securities legislation and within the meaning of Section 27A of the United States Securities Act of 1933, as amended, Section 21E of the United States Exchange Act of 1934, as amended, the United States Private Securities Litigation Reform Act of 1995, or in releases made by the
Cautionary Note to
This news release has been prepared in accordance with Canadian standards for the reporting of mineral resource and mineral reserve estimates, which differ from the previous and current standards of
For
As a result of the adoption of the SEC Modernization Rules, the
Appendix: Drill Results
Table 1: Camino Rojo Extension Composite Drill Results (Composites 1g/t Au cog)
HOLE-ID |
From |
To |
Core Length |
Estimated True Width |
Au g/t |
Ag g/t |
Cu |
As |
Pb |
Zn |
Mo |
AuEq* g/t |
Au GXM |
AuEq GXM |
Au GXM |
Including |
Litho |
|
CRSX23-22 |
430.60 |
435.40 |
4.8 |
3.46 |
6.23 |
8.4 |
36 |
2621 |
602 |
700 |
1.2 |
6.39 |
29.89 |
30.66 |
21.56 |
1.6m @ 15g/t Au |
430.6 - 431.25 Caracol |
SX |
CRSX23-22 |
471.00 |
472.50 |
1.5 |
1.08 |
2.51 |
58.2 |
90 |
1545 |
1550 |
5170 |
2.0 |
3.52 |
3.77 |
5.28 |
2.71 |
|
Caracol |
FR |
CRSX23-22 |
489.00 |
490.50 |
1.5 |
1.08 |
1.81 |
4.8 |
37 |
2020 |
68 |
95 |
1.0 |
1.88 |
2.72 |
2.82 |
1.95 |
|
Caracol |
FR |
CRSX23-22 |
535.50 |
537.00 |
1.5 |
1.08 |
1.53 |
18.1 |
92 |
1285 |
1375 |
19100 |
2.0 |
2.71 |
2.30 |
4.06 |
1.66 |
|
Caracol |
SX |
CRSX23-22 |
550.50 |
556.50 |
6.0 |
4.35 |
1.00 |
61.2 |
70 |
2854 |
3273 |
3721 |
0.9 |
2.03 |
6.00 |
12.21 |
4.35 |
|
Caracol |
SX |
CRSX23-22 |
583.50 |
586.50 |
3.0 |
2.19 |
1.79 |
26.7 |
108 |
4265 |
876 |
6880 |
0.8 |
2.48 |
5.38 |
7.45 |
3.92 |
|
Caracol |
SX |
CRSX23-22 |
684.00 |
690.00 |
6.0 |
4.32 |
1.77 |
5.5 |
53 |
2994 |
133 |
278 |
1.0 |
1.86 |
10.64 |
11.19 |
7.67 |
|
Caracol |
SX |
CRSX23-22 |
1063.50 |
1066.50 |
3.0 |
2.27 |
1.36 |
0.4 |
12 |
12 |
12 |
526 |
3.5 |
1.39 |
4.07 |
4.16 |
3.08 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1100.40 |
1101.50 |
1.1 |
0.83 |
2.64 |
195.0 |
4486 |
9786 |
3682 |
3264 |
1.5 |
5.88 |
2.91 |
6.47 |
2.20 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1106.80 |
1107.30 |
0.5 |
0.44 |
3.71 |
117.0 |
659 |
4850 |
22100 |
33900 |
1.0 |
7.58 |
1.86 |
3.79 |
1.62 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1112.00 |
1113.50 |
1.5 |
1.13 |
1.44 |
7.0 |
106 |
837 |
655 |
3300 |
1.0 |
1.72 |
2.16 |
2.58 |
1.63 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1121.00 |
1122.50 |
1.5 |
1.13 |
1.16 |
0.3 |
13 |
235 |
94 |
353 |
1.0 |
1.18 |
1.74 |
1.78 |
1.32 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1131.90 |
1133.50 |
1.6 |
1.39 |
2.21 |
0.3 |
137 |
51 |
3 |
51 |
0.5 |
2.23 |
3.54 |
3.57 |
3.08 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1138.00 |
1139.30 |
1.3 |
1.13 |
1.41 |
0.5 |
61 |
5 |
4 |
210 |
0.5 |
1.43 |
1.83 |
1.86 |
1.60 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1144.70 |
1147.30 |
2.6 |
2.27 |
2.01 |
48.7 |
780 |
2499 |
5872 |
32366 |
1.0 |
4.43 |
5.24 |
11.53 |
4.57 |
|
Cuesta de Cura |
SX |
CRSX23-22 |
1175.50 |
1179.75 |
4.3 |
3.71 |
1.33 |
70.5 |
2243 |
2356 |
2195 |
1832 |
2.3 |
2.65 |
5.66 |
11.26 |
4.94 |
|
1175.5 - 1177 FG Intrusives - hdb-bi-pl |
SX |
CRSX23-22 |
1226.00 |
1227.10 |
1.1 |
0.96 |
2.13 |
66.5 |
1089 |
1686 |
3906 |
55314 |
3.2 |
5.82 |
2.34 |
6.40 |
2.05 |
|
La Peña |
SX |
CRSX23-22A |
1033.50 |
1035.00 |
1.5 |
1.17 |
1.20 |
12.6 |
1470 |
2010 |
78 |
2500 |
14.0 |
1.67 |
1.80 |
2.51 |
1.40 |
|
Cuesta de Cura |
SX |
CRSX23-22A |
1047.85 |
1059.70 |
11.9 |
9.25 |
2.48 |
34.2 |
918 |
7777 |
1586 |
13400 |
4.4 |
3.70 |
29.33 |
43.82 |
22.89 |
|
Cuesta de Cura |
SX |
CRSX23-22A |
1066.40 |
1072.00 |
5.6 |
4.39 |
10.30 |
37.8 |
1172 |
10536 |
795 |
38088 |
2.3 |
12.73 |
57.67 |
71.29 |
45.17 |
0.7m @ 23.8g/t Au |
1066.4 - 1070.4 Cuesta de Cura |
SX |
CRSX23-22A |
1090.40 |
1096.50 |
6.1 |
5.18 |
1.06 |
4.0 |
385 |
127 |
24 |
2174 |
2.5 |
1.26 |
6.46 |
7.70 |
5.48 |
|
1090.4 - 1091.2 FG Intrusives - hdb-bi-pl |
SX |
CRSX23-22B |
820.50 |
822.00 |
1.5 |
1.17 |
2.24 |
13.1 |
238 |
2230 |
407 |
509 |
9.0 |
2.47 |
3.36 |
3.70 |
2.62 |
|
Indidura |
SX |
CRSX23-22C |
1044.85 |
1056.50 |
11.7 |
8.94 |
4.86 |
43.6 |
850 |
6053 |
4438 |
12685 |
3.2 |
6.25 |
56.62 |
72.84 |
43.43 |
1.7m @ 28.6g/t Au |
Cuesta de Cura |
SX |
CRSX23-22C |
1063.60 |
1068.00 |
4.4 |
3.38 |
3.02 |
27.0 |
996 |
2311 |
286 |
12811 |
3.0 |
4.10 |
13.31 |
18.03 |
10.21 |
|
Cuesta de Cura |
SX |
CRSX23-22C |
1084.00 |
1085.50 |
1.5 |
1.15 |
1.44 |
5.7 |
296 |
872 |
143 |
7430 |
2.0 |
1.90 |
2.15 |
2.85 |
1.65 |
|
Cuesta de Cura |
SX |
Criteria: Cut off grade 1g/t Au, minimum length 1.5m, maximum consecutive internal waste 6m, if Au grade x length > 1.5 the composite will be added |
Price Assumptions: Au = |
*(Au+Ag+Cu+Zn+Pb) |
Table 2: Camino Rojo Extension Drill Hole Collars
HOLE-ID |
Easting |
Northing |
Elevation |
Azimuth |
Dip |
Depth (m) |
CRSX23-22 |
243401.2 |
2675997.4 |
1955.6 |
165.5 |
-76.00 |
1341.5 |
CRSX23-22A |
243401.2 |
2675997.4 |
1955.6 |
152.3 |
-63.00 |
1140.0 |
CRSX23-22B |
243401.2 |
2675997.4 |
1955.6 |
181.9 |
-64.28 |
1140.1 |
CRSX23-22C |
243401.2 |
2675997.4 |
1955.6 |
142.0 |
-63.00 |
1125.2 |
SOURCE