Second Batch of Lithium Ridge Drill Results

Andrada Mining

05/05/2026 07:00

RNS Number : 9106C

Andrada Mining Limited

05 May 2026

 

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) as in force in the United Kingdom pursuant to the European Union (Withdrawal) Act 2018. Upon the publication of this announcement via Regulatory Information Service (RIS), this inside information will be in the public domain.

Andrada Mining Limited

("Andrada" or the "Company")

Consistent High-Grade Li2O Lithium Intercepts in the Second Batch Drill Results From Lithium Ridge

Demonstrating Growing Scale, Strong Continuity and Polymetallic Upside Across Multiple Drill Holes

Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF), a tin producer with a portfolio of critical minerals mining and exploration assets in Namibia, is pleased to announce a second batch of diamond drilling results from Lithium Ridge ("LR" or the "Project") which continue to confirm the presence of consistent high-grade lithium mineralisation from surface to depth. These results further strengthen confidence in the scale and continuity of the mineralised system, while also confirming the presence of associated tin and tantalum mineralisation.

HIGHLIGHTS

§ High-grade lithium mineralisation confirmed across multiple drill holes, including:

−   Drill hole LRD031: 21.33m @ 1.24% Li2O from 146.18m to 167.51m.

·   Including 7.20m @ 1.99% Li2O from 154.61m to 161.81m.

−   Drill hole LRD025: 16.24m @ 1.04% Li2O from 0.87m to 17.11m.

·   Including 8.86m @ 1.63% Li2O from 7.92m to 16.78m.

−   Drill hole LRD022: 10.87m @ 1.38% Li2O from 25.68m to 36.55m.

·   Including 7.35m @ 1.68% Li2O from 27.68m to 35.03m.

−   Drill hole LRD017: 5.88m @ 1.50% Li2O from 76.50m to 82.38m.

·   including 3.00m @ 1.94% Li2O from 76.50m to 79.50m.

§ Tin and tantalum upside: associated credits in tin (Sn) and tantalum (Ta) mineralisation confirmed in all reported holes.

§ Expanded drill programme: following strong drill results, the Stage 1 programme under the earn-in agreement with Sociedad Química y Minera de Chile SA through its subsidiary SQM Australia (Pty) Ltd ("SQM") has been extended by approximately 18% to 16 500 metres, to more fully define the scale and continuity of the mineralised system.

§ These results continue to build a scenario that points to a large-scale lithium system within a well-established mining jurisdiction.

Anthony Viljoen, Chief Executive Officer, commented:

"These results continue to strengthen our understanding of Lithium Ridge's pegmatite system, demonstrating consistent mineralisation across multiple drill holes. The combination of scale and grade emerging at this stage is particularly compelling. On the back of these strong results, we have expanded the drilling programme to more fully test the extent of the system and to deepen our understanding of its full value potential, with the objective of accelerating overall project development. Comprising multiple critical minerals, Lithium Ridge is developing into a potentially exciting project within our critical minerals portfolio in Namibia."

RESULTS Overview

The results refer to an additional seven drill holes and 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 geological team on site. Tin and tantalum grades have also been highlighted, as these minerals confirm the fertility of lithium-bearing pegmatites at Lithium Ridge and may provide potential by-product value.

Reporting Methodology

All the holes 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 do 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 considered as having no economic significance. Two pegmatites were sampled from drill hole LRD033, however the grades reported did not meet the cut off criteria. Downhole orientation surveys were conducted at regular intervals for each hole while the hole was advancing and, further surveyed in totality after drilling was completed. The surveys were conducted using a magnetic deviation probe that collected readings at two metre intervals, and collar locations were surveyed using a handheld GPS.

Sampling and Analysis

Each drill hole was geologically and structurally logged prior to being cut and sampled as quarter core. The sampling programme attempted to follow geological contacts while also maintaining consistency in data representativity. Sampling was undertaken with reference to geological contacts while maintaining consistency in sample representativity. Sample lengths ranged from a minimum of 25 cm to a maximum of 125 cm, where practicable. The samples were submitted to SA Labs Ithuba for pulverisation and homogenisation, and the pulps subsequently dispatched to UIS Analytical Services for chemical analysis. Both laboratories are independent and certified. Lithium and other major elements were analysed using sodium peroxide fusion with ICP-OES, while tin, tantalum and other trace elements were analysed using lithium borate fusion with ICP-MS. No top cut was applied in calculating the weighted average grades for mineralised intersections within the pegmatites.

Programme Expansion

The Stage 1 drill programme (the "Programme") has been expanded to approximately 16 500 metres of orientated diamond core drilling across the license area and extended by an additional three months to further define the depth and continuity extents of the mineralised pegmatites identified at surface.

Table 1: Results of the intersected mineralised pegmatites with the intersection depths, lengths and grades reported. Intersections described as 'Including' refer to a portion of the whole pegmatite intersection with significant metal values. The reported intersections are indicative of apparent thickness, which is greater than true thickness.

Hole ID
Dip Angle (Degrees)
Intersection Type
From - To (metres)
Length (m)
Grades
Li₂O (%)
Sn (%)
Ta (ppm)
LRD014
-55
Whole Intersection
8.38 - 13.47
5.09
0.41
0.17
40
Whole Intersection
14.62 - 15.56
0.94
0.21
0.23
57
Whole Intersection
123.98 - 128.06
4.08
0.26
0.24
69
LRD015
-60
Whole Intersection
29.77 - 30.14
0.37
0.01
0.06
161
Whole Intersection
31.22 - 31.51
0.29
0.01
0.05
326
Whole Intersection
53.24 - 53.49
0.25
0.08
0.07
130
Whole Intersection
77.76 - 79.83
2.07
0.27
0.05
134
Whole Intersection
81.23 - 85.26
4.03
1.25
0.11
63
Including
82.23 - 84.23
2.00
1.55
0.09
56
Whole Intersection
129.34 - 130.11
0.77
0.17
0.20
145
Whole Intersection
132.80 - 133.08
0.28
0.26
0.07
176
Whole Intersection
138.59 - 140.05
1.46
0.70
0.17
82
Whole Intersection
144.46 - 153.11
8.65
1.58
0.14
58
Including
147.52 - 150.52
3.00
2.75
0.15
39
LRD017
-55
Whole Intersection
19.09 - 19.68
0.59
0.02
0.09
431
Whole Intersection
25.84 - 26.10
0.26
0.49
0.19
130
Whole Intersection
46.91 - 47.75
0.84
0.05
0.29
116
Whole Intersection
74.11 - 74.50
0.39
0.08
0.05
100
Whole Intersection
76.50 - 82.38
5.88
1.50
0.11
46
Including
76.50 - 79.50
3.00
1.94
0.09
47
LRD019
-60
Whole Intersection
55.31 - 55.56
0.25
0.03
0.03
191
Whole Intersection
60.85 - 61.10
0.25
0.20
0.13
86
Whole Intersection
62.50 - 66.60
4.10
0.62
0.17
80
Whole Intersection
67.07 - 67.32
0.25
0.17
0.10
118
Whole Intersection
67.95 - 68.35
0.40
0.08
0.04
280
Whole Intersection
68.70 - 72.05
3.35
1.41
0.18
94
Including
69.70 - 71.70
2.00
1.80
0.10
96
Whole Intersection
83.98 - 86.54
2.56
0.80
0.29
195
Whole Intersection
87.12 - 87.63
0.51
0.13
0.09
123
Whole Intersection
93.83 - 94.41
0.58
0.13
0.39
512
LRD020
-55
Whole Intersection
25.07 - 32.21
7.14
0.64
0.18
132
Including
30.20 - 31.06
0.86
1.43
0.12
114
Whole Intersection
49.95 - 50.65
0.70
0.14
0.11
117
Whole Intersection
51.18 - 51.43
0.25
0.24
0.08
105
Whole Intersection
51.76 - 54.02
2.26
0.22
0.13
130
Whole Intersection
54.35 - 54.60
0.25
0.28
0.08
163
Whole Intersection
54.85 - 56.86
2.01
0.78
0.15
151
Whole Intersection
57.14 - 57.57
0.43
0.20
0.12
143
LRD021
-60
Whole Intersection
14.56 - 22.45
7.89
1.06
0.17
46
Including
16.15 - 21.00
4.85
1.33
0.12
26
Whole Intersection
24.24 - 24.94
0.70
0.05
0.10
266
LRD022
-60
Whole Intersection
14.02 - 15.74
1.72
0.17
0.10
47
Whole Intersection
25.68 - 36.55
10.87
1.38
0.11
34
Including
27.68 - 35.03
7.35
1.68
0.12
19
LRD025
-60
Whole Intersection
0.87 - 17.11
16.24
1.04
0.11
87
Including
7.92 - 16.78
8.86
1.63
0.13
105
LRD026
-60
Whole Intersection
1.29 - 4.02
2.73
0.34
0.12
250
Whole Intersection
42.88 - 46.37
3.49
0.48
0.05
86
LRD028
-60
Whole Intersection
17.61 - 19.74
2.13
0.22
0.16
195
LRD031
-55
Whole Intersection
17.25 - 20.07
2.82
0.63
0.23
152
Whole Intersection
100.34 - 102.02
1.68
0.41
0.06
111
Whole Intersection
130.58 - 131.80
1.22
0.06
0.08
399
Whole Intersection
133.96 - 134.24
0.28
0.05
0.08
203
Whole Intersection
141.32 - 141.76
0.44
0.05
0.09
134
Whole Intersection
146.18 - 167.51
21.33
1.24
0.13
38
Including
154.61 - 161.81
7.20
1.99
0.09
35
Whole Intersection
168.96 - 169.48
0.52
0.80
0.07
31
Whole Intersection
173.81 - 174.28
0.47
0.15
0.17
108
Whole Intersection
181.69 - 182.41
0.72
0.21
0.02
229
Whole Intersection
185.51 - 187.48
1.97
0.15
0.04
82
LRD032
-55
Whole Intersection
15.03 - 23.43
8.40
0.97
0.15
39
Including
16.77 - 20.11
3.34
1.79
0.19
30
Whole Intersection
125.93 - 127.79
1.86
0.23
0.18
82
Whole Intersection
157.31 - 157.61
0.30
0.33
0.03
52
Whole Intersection
170.25 - 170.83
0.58
0.04
0.15
49



Figure 1: locations of the completed and planned diamond drill (DD) holes (circles) from this campaign and the reverse circulation (RC) drill holes (triangles) 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 hole, LDR031, for which results are reported in this announcement and the RC drill hole, ATNN16, which was drilled during the 2023 campaign. The mineralised intersections from LDR031 are reported in Table 1.

Competent Person statement

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
RC
Reverse Circulation Drill
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.
Geological Model
The interpretation of mineralisation and geology that controls the shape of the mineralised unit. This is usually generated in a three-dimensional computer environment.
Pegmatite
An igneous rock typically of granitic composition, which is distinguished from other igneous rocks by the extremely coarse size of its crystals, or by an abundance of crystals with skeletal, graphic, or other strongly directional growth habits, or by a prominent spatial zonation of mineral assemblages.
Xenolith
A foreign rock fragment (e.g., schist) within an intrusive body (e.g., pegmatite) that is unrelated to the igneous body.
CONTACT
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
Jay Ashfield
Matt Hasson
+44 (0) 20 7907 8500
Berenberg
Jennifer Lee
+44 (0) 20 3753 3040
FINANCIAL PUBLIC RELATIONS
Tavistock (United Kingdom)
Emily Moss
Josephine Clerkin
+44 (0) 207 920 3150
andrada@tavistock.co.uk


About Andrada Mining Limited

Andrada Mining Limited, listed on the London Stock Exchange's AIM market, is a tin producer with a portfolio of critical minerals mining and exploration assets in Namibia, a premier investment destination in Africa. The Company's strategy focuses on unlocking Namibia's abundant mineral resources via best-in-class strategic partnerships across its resource base, enhancing the country's reputation as a leading global hub for African critical mineral investment. Andrada is actively scaling up tin production alongside lithium, tantalum, tungsten and copper, steadily broadening its operational footprint and output. The Company aims to supply critical raw materials from its extensive resource portfolio to support a sustainable future, improve quality of life, and uplift communities near its operations. These critical metals play a crucial role in the green energy transition, serving as essential components for electric vehicles, solar panels, and wind turbines.

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy.

 
  END

 

 
DRLUSRKRNSUVRAR