alibre controls an undivided 100% interest in the Eastern Borosi Gold-Silver Property (the “Property” or “EBP”), a Property formerly subject to a joint venture with IAMGOLD Corporation (“IAMGOLD”), located in the northeastern Nicaragua a low-sulphidation, epithermal district that hosts numerous high-grade, gold-silver vein systems (see Calibre news release dated August 13, 2020). The vein systems hosting the current 700,500 ounces of inferred gold resources remain open to further expansion along with numerous undrilled targets. From 2014 to 2020, IAMGOLD spent approximately US$10 million on the Property in order to earn a 70% interest in the Property.
Exploration to date on the Eastern Borosi Project has outlined several tens of kilometres of highly prospective mineralized structures located in an historic gold-silver mining district. Targets have been defined by surface soil and rock sampling, trenching and drilling.
To date in 2017, Total holes completed to date: 16 (5 Guapinol, 3 RDO, 5 East Dome, 3 Main Blag) and total meterage to date 5,159.56m (1,427.92m Guapinol, 1,352.67m RDO, 1,334.35m East Dome, 1,044.62 Main Blag). Results have been received and are being reported in this news release for the first 14 holes. Drilling in 2017 is targeting a series of high grade gold-silver vein systems defined by historic drilling and drilling campaigns in 2014, 2015, and 2016. Step out drill holes are testing down plunge and on-strike extensions. Low sulphidation epithermal gold-silver mineralization intersected on the Eastern Borosi Project is hosted within porphyritic andesite and consists of structurally controlled, high energy quartz-carbonate vein breccias, vein-stockworks and discrete smokey quartz veins containing fine grained sulphide minerals.
Drilling at East Dome has extended the mineralization 100 metres to the south. The step out drilling intersected 8.0 metres grading 11.7 g/t silver (BL17-050), 10.72 metres grading 0.24 g/t gold and 57.3 g/t silver including 1.22 metres grading 1.36 g/t gold and 135.0 g/t silver and a second intercept of 9.86 metres grading 0.06 g/t gold and 31.4 g/t silver (BL17-051), 8.00 metres grading 1.57 g/t gold and 38.3 g/t silver including 1.78 metres grading 5.69 g/t gold and 71.1 g/t silver (BL17-052), 4.48 metres grading 0.83 g/t gold and 42.1 g/t silver and a second zone of 3.33 metres grading 0.03 g/t gold and 65.4 g/t silver (BL17-053), and 9.62 metres grading 0.70 g/t gold and 60.5 g/t silver including 1.30 metres grading 3.78 g/t gold and 208.0 g/t silver (BL17-054). Additional step out drilling will be completed on the East Dome target.
One kilometer west drilling on the Main Blag Gold-Silver Vein System has extended the mineralization 50 metres to the south testing the structure in that area to a depth of 325 metres below surface. The mineralized interval of 5.87 metres grades 0.12 g/t gold and 4.5 g/t silver (BL17-055), drill hole BL17-056 intersected the mineralization approximately 350 metres below surface with results pending. Drill hole BL17-057 was lost in a strong fault zone consisting of tectonic breccia and fault gouge.
Five holes tested the extensions of the Guapinol mineralization. Drill hole GP17-047 intersected 2.95 metres grading 0.45 g/t gold and 1.1 g/t silver. Hole GP17-048 intersected historic underground workings but no mineralized structure, while GP17-049 included 1.3 metres grading 1.02 g/t gold and 6.3 g/t silver, GP17-050 intersected 2.15 metres grading 0.39 g/t gold and 1.8 g/t silver, and GP17-051 included 7.2 metres grading 0.21 g/t gold and 1.4 g/t silver.
Drilling on the Riscos de Oro (RDO) Structure, the first drilling at RDO since 2011, has intersected 4.52 metres grading 1.02 g/t gold and 5.5 g/t silver with a second zone of 1.09 metres grading 1.34 g/t gold and 3.2 g/t silver (RD17-045), 4.78 metres grading 0.25 g/t gold and 2.3 g/t silver (RD17-044), and 3.00 metres grading 0.35 g/t gold and 1.7 g/t silver (RD17-043). Additional drilling is on-going testing step-outs on the RDO structure.
IAMGOLD FIRST OPTION 2014 – 2017 Drill Hole Highlights
| HOLE ID | TARGET | AU G/T | AG G/T | LENGTH (M) | FROM M | TO M |
|---|---|---|---|---|---|---|
| GP15-034 | Guapinol | 98.72 | 49.1 | 1.39 | 332.23 | 333.62 |
| GP14-003 | Guapinol | 25.66 | 35.2 | 4.81 | 69.75 | 74.56 |
| GP14-010 | Vancouver | 8.73 | 11.5 | 12.90 | 91.60 | 104.50 |
| BL15-011 | Main Blag | 3.08 | 381.3 | 10.74 | 21.86 | 32.60 |
| GP14-002 | Guapinol | 14.39 | 14.5 | 6.03 | 112.53 | 118.56 |
| BL15-017 | East Dome | 1.11 | 223.4 | 19.16 | 120.50 | 139.66 |
| BL15-009 | Main Blag | 5.36 | 194.6 | 9.92 | 135.33 | 145.25 |
| BL15-010 | Main Blag | 2.52 | 246.4 | 12.82 | 64.38 | 77.20 |
| BL15-018 | East Dome | 0.69 | 488.6 | 9.44 | 91.44 | 100.88 |
| GP14-030 | Guapinol | 17.70 | 16.5 | 4.15 | 158.92 | 163.07 |
| BL16-044 | East Dome | 2.27 | 127.9 | 16.50 | 194.00 | 210.50 |
| GP14-028 | Guapinol | 13.44 | 14.5 | 5.07 | 191.53 | 196.60 |
| GP16-046 | Veta Loca | 10.15 | 6.9 | 6.31 | 88.00 | 94.31 |
| BL16-038 | Main Blag | 11.13 | 13.7 | 5.61 | 179.82 | 185.43 |
| BL16-044 | East Dome | 9.64 | 404.4 | 3.38 | 206.17 | 209.55 |
| BL14-005 | Main Blag | 2.18 | 133.8 | 12.47 | 77.45 | 89.92 |
| GP15-037 | Vancouver | 6.26 | 41.4 | 7.08 | 102.40 | 109.48 |
| BL16-043 | East Dome | 1.21 | 120.9 | 15.35 | 97.65 | 113.00 |
| GP14-001 | Guapinol | 39.90 | 132.0 | 1.00 | 76.97 | 77.97 |
| LS15-008 | Cadillac | 8.93 | 57.4 | 4.10 | 65.60 | 69.70 |
| BL15-006 | Main Blag | 5.97 | 56.1 | 5.85 | 149.83 | 155.68 |
| BL15-023 | Santos Trend | 5.74 | 4.8 | 6.44 | 60.96 | 67.40 |
| GP14-027 | Guapinol | 14.49 | 8.9 | 1.90 | 146.20 | 148.10 |
| BL16-048 | East Dome | 0.84 | 73.5 | 13.72 | 97.00 | 110.72 |
| BL16-043 | East Dome | 3.61 | 348.7 | 3.00 | 110.00 | 113.00 |
| GP14-027 | Guapinol | 33.40 | 18.5 | 0.78 | 146.54 | 147.32 |
| BL16-040 | East Dome | 2.69 | 431.6 | 2.78 | 162.84 | 165.62 |
| GP16-040 | Vancouver | 1.45 | 4.3 | 15.34 | 175.00 | 190.34 |
| BL17-058 | East Dome | 0.38 | 328.3 | 4.05 | 296.00 | 300.05 |
| GP14-031 | Guapinol | 4.06 | 4.5 | 5.03 | 187.97 | 193.00 |
| BL16-046 | Main Blag | 1.57 | 7.8 | 12.10 | 271.45 | 283.55 |
| BL17-060 | East Dome | 2.74 | 42.5 | 6.00 | 315.67 | 321.67 |
Eastern Borosi Property Map
