Lithium Ridge Drill Results
Andrada Mining Limited has announced significant high-grade lithium results from its Lithium Ridge Project, with drill hole LRD097 intersecting 35.59 metres at 1.52% Li₂O, including 24.08 metres at 2.00% Li₂O, and LRD093 returning 30.24 metres at 1.23% Li₂O. These results, which also show consistent tin and tantalum enrichment, highlight the project's polymetallic potential, with drill hole LRD041 intersecting 7.49 metres at 0.44% Sn and 134ppm Ta. The company is advancing the project in partnership with SQM, and these findings are expected to enhance the asset's scale and grade profile.
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Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF), a tin producer with a portfolio of critical metals mining and exploration assets in Namibia is pleased to announce the fourth batch of results comprising 14 Diamond Drill ("DD") holes from the Lithium Ridge Project ("LR" or the "Project"). These results show significant high-grade lithium mineralisation along strike and continuity at depth, alongside consistent tin and tantalum enrichment. This highlights the scale and robust polymetallic economic potential of the Project as it is advanced in partnership with SQM International ("SQM").
HIGHLIGHTS
- High-grade lithium mineralisation confirmed across multiple drill holes, including:
- Drill hole LRD097: 35.59m @ 1.52% Li2O from 231.80m to 267.39m.
o Including 24.08m @ 2.00% Li2O from 233.04m to 257.12m.
- Drill hole LRD093: 30.24m @ 1.23% Li2O from 125.18m to 155.42m.
o Including 9.65m @ 1.83% Li2O from 138.02m to 147.67m.
- Drill hole LRD054: 10.93m @ 0.67% Li2O from 75.06m to 85.99m.
o Including 2.03m @ 1.93% Li2O from 80.50m to 82.53m.
- Drill hole LRD036: 6.67m @ 1.11% Li2O from 29.05m to 35.72m.
o Including 4.23m @ 1.62% Li2O from 29.77m to 34.00m.
- Valuable polymetallic co-products: Consistent associated tin and tantalum mineralisation confirmed across all holes, potentially enhancing project economics through potential polymetallic revenue streams
- Drill hole LRD041: 7.49m @ 0.44% Sn and 134ppm Ta.
Anthony Viljoen, Chief Executive Officer, commented:
"Once again, these exceptional drill results confirm the world-class potential of our Lithium Ridge asset, which we are developing in tandem with our partners SQM. Intersecting over 24 metres at 2.00% Li₂O in drill hole LRD097 is a milestone achievement that fundamentally enhances the scale and grade profile of the asset, showing continued potential at depth. The persistent presence of high-grade tin and tantalum co-products, such as the 0.44% tin intersection over 7.49 metres in hole LRD041 indicates an economic advantage that sets Andrada apart from single-commodity lithium developers. These polymetallic credits have the potential to significantly reduce overall operating costs, validating our aggressive exploration focus and ultimately reinforcing Namibia's position as a premier critical metal jurisdiction."
RESULTS OVERVIEW
The current DD campaign at Lithium Ridge (ML133) is designed to test the down-dip continuity and grade distribution of the outcropping pegmatite swarms identified during previous channel sampling and mapping programmes. This batch of results successfully demonstrates that the mineralised pegmatite bodies continue at depth with areas of significant lithium enrichment. The presence of robust tin and tantalum grades within the same pegmatites underscores the polymetallic endowment of the license area. This allows Andrada to leverage its existing processing expertise to maximize resource extraction and project economics.
The results are for an additional fourteen drill holes. The holes are reported as 'Whole Intersections' in Table 1, representing pegmatite intersections from the top to the bottom contact. Where these intersections contain schistose xenoliths, the reported grades reflect the metal content of the pegmatite only, excluding the schistose intervals. Intersections reported as "including" represent selected higher-grade zones within the total pegmatite intersection. Spodumene has been visually identified as the primary lithium-bearing mineral by the project geological team.
Reporting Methodology
The boreholes were drilled at inclined angles to the horizontal and, accordingly, the reported intersections are considered to represent apparent widths rather than true thicknesses. Pegmatite intersections that did not meet at least one of the following metal content cut-off criteria (>0.25% Li₂O, >0.1% Sn or >99ppm Ta) have not been reported as they are currently regarded as economically insignificant. Downhole orientation surveys were conducted at regular intervals for each hole as the drilling was advancing and were surveyed in totality once drilling was completed. The surveys were conducted using a magnetic deviation probe that collected readings at two metre intervals. Drill collar locations were surveyed using a handheld GPS.
Sampling and Analysis
Individual drill holes were geologically and structurally logged prior to being cut and sampled as quarter core. The sampling programme followed geological contacts while simultaneously maintaining consistency in data and sample representativity. Sample lengths ranged from 25 cm to 125 cm, where practicable. The samples were submitted to independent and certified laboratories, namely SA Labs Ithuba for pulverisation and homogenisation, and the pulps were subsequently dispatched to UIS Analytical Services for chemical analysis. Lithium and other related major elements were analysed using sodium peroxide fusion by ICP-OES, while tin, tantalum and other trace elements were analysed using lithium borate fusion by ICP-MS. No top cut was applied in calculating the weighted average grades for mineralised intersections within the pegmatites.
| Hole ID | Dip Angle (Degrees) | Intersection Type | From - To (metres) | Length (m) | Grade | ||
|---|---|---|---|---|---|---|---|
| Li₂O (%) | Sn (%) | Ta (ppm) | |||||
| LRD030 | -50 | Whole Intersection | 14.96 - 15.30 | 0.34 | 0.02 | 0.13 | 130 |
| Whole Intersection | 31.12 - 32.06 | 0.94 | 0.29 | 0.11 | 287 | ||
| Whole Intersection | 88.75 - 92.07 | 3.32 | 1.04 | 0.14 | 164 | ||
| Whole Intersection | 95.88 - 98.02 | 2.14 | 0.53 | 0.41 | 164 | ||
| Whole Intersection | 100.75 - 102.96 | 2.21 | 1.05 | 0.28 | 70 | ||
| Whole Intersection | 104.54 - 106.66 | 2.12 | 0.95 | 0.35 | 74 | ||
| Whole Intersection | 107.45 - 110.21 | 2.76 | 1.04 | 0.14 | 52 | ||
| Whole Intersection | 113.76 - 115.62 | 1.86 | 0.93 | 0.15 | 37 | ||
| Whole Intersection | 115.87 - 116.80 | 0.93 | 1.04 | 0.06 | 47 | ||
| Whole Intersection | 117.52 - 118.06 | 0.54 | 0.98 | 0.14 | 37 | ||
| Whole Intersection | 118.34 - 119.65 | 1.31 | 0.33 | 0.23 | 80 | ||
| Whole Intersection | 120.20 - 121.53 | 1.33 | 0.32 | 0.12 | 42 | ||
| Whole Intersection | 150.61 - 152.77 | 2.16 | 0.26 | 0.09 | 53 | ||
| Whole Intersection | 171.79 - 172.74 | 0.95 | 0.02 | 0.19 | 57 | ||
| Whole Intersection | 182.80 - 183.73 | 0.93 | 0.04 | 0.02 | 39 | ||
| LRD034 | -60 | Whole Intersection | 3.73 - 4.83 | 1.10 | 0.02 | 0.16 | 85 |
| Whole Intersection | 23.39 - 23.64 | 0.25 | 0.04 | 0.01 | 78 | ||
| Whole Intersection | 25.57 - 26.49 | 0.92 | 0.08 | 0.11 | 76 | ||
| Whole Intersection | 29.81 - 33.12 | 3.31 | 0.30 | 0.23 | 86 | ||
| Whole Intersection | 41.35 - 41.60 | 0.25 | 0.02 | 0.01 | 96 | ||
| LRD035 | -60 | Whole Intersection | 0.50 - 0.70 | 0.20 | 0.02 | 0.13 | 66 |
| Whole Intersection | 16.53 - 29.95 | 13.42 | 1.15 | 0.16 | 60 | ||
| Including | 17.98 - 27.00 | 9.02 | 1.38 | 0.15 | 54 | ||
| Whole Intersection | 57.82 - 71.83 | 14.01 | 0.65 | 0.14 | 62 | ||
| Including | 63.59 - 69.90 | 6.31 | 1.20 | 0.17 | 49 | ||
| LRD036 | -60 | Whole Intersection | 12.20 - 14.31 | 2.11 | 0.20 | 0.17 | 202 |
| Whole Intersection | 29.05 - 35.72 | 6.67 | 1.11 | 0.17 | 65 | ||
| Including | 29.77 - 34.00 | 4.23 | 1.62 | 0.20 | 61 | ||
| Whole Intersection | 65.59 - 65.89 | 0.30 | 0.04 | 0.14 | 147 | ||
| LRD038 | -50 | Whole Intersection | 59.47 - 59.91 | 0.44 | 0.03 | 0.34 | 108 |
| LRD040 | -45 | Whole Intersection | 16.49 - 16.75 | 0.26 | 0.13 | 0.12 | 180 |
| Whole Intersection | 22.73 - 23.65 | 0.92 | 0.25 | 0.98 | 249 | ||
| Whole Intersection | 54.90 - 55.25 | 0.35 | 0.03 | 0.02 | 147 | ||
| Whole Intersection | 92.75 - 93.43 | 0.68 | 0.25 | 0.11 | 196 | ||
| Whole Intersection | 149.90 - 150.20 | 0.30 | 0.06 | 0.30 | 109 | ||
| Whole Intersection | 156.89 - 157.22 | 0.33 | 0.05 | 0.19 | 53 | ||
| Whole Intersection | 158.96 - 160.90 | 1.94 | 0.23 | 0.21 | 98 | ||
| Whole Intersection | 181.27 - 181.99 | 0.72 | 0.03 | 0.29 | 103 | ||
| LRD041 | -90 | Whole Intersection | 26.21 - 33.70 | 7.49 | 0.39 | 0.44 | 134 |
| Hole ID | Dip Angle (Degrees) | Intersection Type | From - To (metres) | Length (m) | Grade | Grade | Grade |
| Li₂O (%) | Sn (%) | Ta (ppm) | |||||
| LRD044 | -45 | Whole Intersection | 2.55 - 3.38 | 0.83 | 0.20 | 0.17 | 151 |
| Whole Intersection | 3.85 - 4.20 | 0.35 | 1.48 | 0.18 | 75 | ||
| Whole Intersection | 8.17 - 10.48 | 2.31 | 0.29 | 0.08 | 155 | ||
| Whole Intersection | 11.64 - 11.99 | 0.35 | 0.16 | 0.13 | 235 | ||
| Whole Intersection | 14.72 - 27.45 | 12.73 | 0.77 | 0.14 | 129 | ||
| Including | 15.63 - 19.54 | 3.91 | 1.40 | 0.14 | 144 | ||
| Whole Intersection | 28.22 - 28.74 | 0.52 | 0.27 | 0.08 | 96 | ||
| Whole Intersection | 43.73 - 44.37 | 0.64 | 0.12 | 0.17 | 103 | ||
| Whole Intersection | 45.26 - 46.31 | 1.05 | 0.24 | 0.11 | 73 | ||
| Whole Intersection | 74.64 - 75.42 | 0.78 | 0.11 | 0.10 | 65 | ||
| Whole Intersection | 90.19 - 91.04 | 0.85 | 0.07 | 0.11 | 63 | ||
| Whole Intersection | 105.69 - 106.28 | 0.59 | 0.06 | 0.32 | 110 | ||
| Whole Intersection | 136.69 - 141.17 | 4.48 | 0.20 | 0.17 | 84 | ||
| Whole Intersection | 155.58 - 157.24 | 1.66 | 0.46 | 0.13 | 83 | ||
| Whole Intersection | 157.95 - 162.33 | 4.38 | 1.20 | 0.16 | 79 | ||
| Including | 158.58 - 160.58 | 2.00 | 1.64 | 0.15 | 84 | ||
| Whole Intersection | 191.36 - 192.02 | 0.66 | 0.02 | 0.19 | 100 | ||
| LRD046 | -60 | Whole Intersection | 25.21 - 26.26 | 1.05 | 0.22 | 0.05 | 745 |
| Whole Intersection | 29.83 - 30.93 | 1.10 | 1.64 | 0.03 | 143 | ||
| Whole Intersection | 32.70 - 33.81 | 1.11 | 0.22 | 0.27 | 355 | ||
| LRD054 | -60 | Whole Intersection | 14.47 - 18.53 | 4.06 | 0.56 | 0.18 | 89 |
| Whole Intersection | 75.06 - 85.99 | 10.93 | 0.67 | 0.15 | 73 | ||
| Including | 80.50 - 82.53 | 2.03 | 1.93 | 0.10 | 77 | ||
| LRD055 | -60 | Whole Intersection | 2.65 - 2.93 | 0.28 | 0.27 | 0.12 | 610 |
| LRD057 | -50 | Whole Intersection | 15.58 - 20.10 | 4.52 | 1.20 | 0.17 | 65 |
| LRD093 | -45 | Whole Intersection | 125.18 - 155.42 | 30.24 | 1.23 | 0.13 | 64 |
| Including | 138.02 - 147.67 | 9.65 | 1.83 | 0.13 | 63 | ||
| Whole Intersection | 157.31 - 162.38 | 5.07 | 0.30 | 0.06 | 23 | ||
| LRD097 | -60 | Whole Intersection | 185.88 - 186.18 | 0.30 | 0.01 | 0.01 | 135 |
| Whole Intersection | 213.17 - 214.30 | 1.13 | 0.23 | 0.05 | 82 | ||
| Whole Intersection | 216.82 - 218.18 | 1.36 | 0.36 | 0.25 | 112 | ||
| Whole Intersection | 220.20 - 220.45 | 0.25 | 0.26 | 0.11 | 102 | ||
| Whole Intersection | 222.28 - 222.60 | 0.32 | 0.44 | 0.12 | 121 | ||
| Whole Intersection | 223.41 - 224.31 | 0.90 | 0.91 | 0.12 | 123 | ||
| Whole Intersection | 224.63 - 225.19 | 0.56 | 1.11 | 0.10 | 93 | ||
| Whole Intersection | 225.53 - 226.14 | 0.61 | 0.76 | 0.04 | 108 | ||
| Whole Intersection | 227.38 - 227.67 | 0.29 | 0.11 | 0.08 | 120 | ||
| Whole Intersection | 229.10 - 229.38 | 0.28 | 0.11 | 0.02 | 127 | ||
| Whole Intersection | 231.80 - 267.39 | 35.59 | 1.52 | 0.13 | 66 | ||
| Including | 233.04 - 257.12 | 24.08 | 2.00 | 0.15 | 73 |
Figure 1: Locations of the current and historically completed programmes. The diamond drill holes are from this campaign and the reverse circulation drill holes (green triangles) were completed during the 2023 campaign. The line A-A' represents the cross section in Figure 2 below.
Figure 2: Section line A-A' displaying a projection of the diamond drill holes, LRD093 and LRD097, for which results are reported in this announcement. The mineralised intersections from LRD093 and LRD097 are reported in Table 1.
CompetenT Person
The technical data in this announcement has been reviewed by Professor Laurence Robb ("Prof. Robb"), who is a non-executive director of Andrada. Prof. Robb has over 30 years industry related exploration and economic geology experience and is a Competent Person for the reporting of exploration results. He has reviewed both the technical disclosures in this release as well as the quality assurance protocols (QA/QC) and results for this programme. As previously announced, the Company will continue to provide regular updates as significant results are received and milestones achieved.
Glossary of abbreviations
| % | Symbol for percentage |
| DD | Diamond Drill |
| ICP-MS | Inductively Coupled Plasma-Mass Spectrometry |
| ICP-OES | Inductively Coupled Plasma-Optical Emission Spectrometry |
| Li | Symbol for lithium |
| Li → Li₂O | Metal to metal-oxide conversion factor of 2.153 |
| Li₂O | Lithium oxide |
| PPM | Parts Per Million |
| QA/QC | Quality Assurance / Quality Control |
| Sn | Symbol for tin |
| Ta | Symbol for tantalum |
| Glossary of technical Terms | |
| Apparent thickness | The relationship between apparent width and true thickness is based on the formula by Addie (1968 Economic Geology, vol 63, pp 188-189). |
| Dip angle | The angle of inclination measured downward from horizontal. |
| CONTACTS Andrada Mining Limited Anthony Viljoen, CEO Sakhile Ndlovu, Head of Investor Relations | +27 (11) 268 6555 |
| NOMINATED ADVISOR & BROKER | |
| Zeus Capital Limited Katy Mitchell Andrew de Andrade Harry Ansell | +44 (0) 20 2382 9500 |
| CORPORATE BROKER & ADVISOR | |
| H&P Advisory Limited Andrew Chubb Matt Hasson | +44 (0) 20 7907 8500 |
| VSA Capital Andrew Monk Brian Wong | +44 (0) 20 3005 5000 |
| FINANCIAL PUBLIC RELATIONS | |
| Tavistock Emily Moss Josephine Clerkin | +44 (0) 207 920 3150 andrada@tavistock.co.uk |
Cleaned text: letterheads, contacts and legal notices removed. View the original announcement ↗ · Company filings. Not investment advice.