REG - Andrada Mining Ltd - Brandberg West Second Batch Drill Results
16/10/2024 07:00
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RNS Number : 3163I Andrada Mining Limited 16 October 2024
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")
Brandberg West Exploration Drill Results
Continuation of notable tin, tungsten and copper intersections
Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF), a critical raw materials
producer with mining and exploration assets in Namibia, is pleased to provide
the final results from its inaugural drilling programme at the historical
Brandberg West mine, situated within the exploration license, EPL5445. The aim
of this programme is to establish an initial understanding of the grade and
geology within the historical open pit area and to investigate potential
mineralised extensions to the north. These results constitute the second and
final batch of samples from this programme, representing ten (10) out of the
twenty (20) holes drilled. (See announcement released on 12 September 2024).
Highlights
All drill holes intersected mineralisation containing the primary metals of
interest, namely tin ("Sn"), tungsten ("W") and copper ("Cu"). Significant
drill intersections include:
§ Drill hole AT3 04:
− 2.25 m at 0.10% Sn, 0.60% W and 1.58% Cu from 9.92 m to 12.17 m
− 2.09 m at 0.80% Sn, 1.23% W and 0.16% Cu from 47.81 m to 49.90 m
− 0.58 m at 1.75% Sn, 0.78% W and 0.24% Cu from 66.16 m to 66.74 m
− 0.66 m at 0.87% Sn, 3.53% W and 0.38% Cu from 119.12 m to 119.78 m
§ Drill hole AT3 07:
− 0.42 m at 0.50% Sn, 1.85% W and 1.28% Cu from 4.37 m to 4.79 m
− 0.31 m at 7.37% Sn, 1.04% W and 0.76% Cu from 14.50 m to 14.81 m
− 0.68 m at 2.32% Sn, 1.64% W and 0.79% Cu from 37.93 m to 38.61 m
− 0.28 m at 0.05% Sn, 1.85% W and 0.54% Cu from 50.14 m to 50.42 m
− 0.25 m at 10.55% Sn, 1.06% W and 0.17% Cu from 151.02 m to 151.27 m
§ Drill hole AT3 20:
− 0.25 m at 1.69% Sn, 0.14% W and 0.07% Cu from 23.68 m to 23.93 m
− 0.42 m at 0.69% Sn, 1.26% W and 0.38% Cu from 25.16 m to 25.58 m
− 1.37 m at 0.19% Sn, 1.54% W and 0.30% Cu from 84.09 m to 85.46 m
− 0.65 m at 1.49% Sn, 1.79% W and 0.13% Cu from 148.93 m to 149.58 m
§ Drill hole AT3 19:
− 0.34 m at 0.05% Sn, 0.06% W and 1.95% Cu from 99.03 m to 99.37 m
− 0.51 m at 1.16% Sn, 0.04% W and 0.59% Cu from 100.05 m to 100.56 m
− 4.96 m at 0.86% Sn, 0.09% W and 0.46% Cu from 140.72 m to 145.68 m
Anthony Viljoen, Chief Executive Officer, commented:
"The continuation of significant high-grade tin, tungsten and copper
intersections at the Brandberg West project endorses our strategic outlook for
this area and is demonstrative of the untapped value at this asset. These
second batch of drill results reported grades as high as 10.55% for tin, 3.53%
for tungsten and 1.95% for copper. These results also show that the
mineralisation continues along strike to the Northeast.
The full exploration results will be evaluated to optimise the next
exploration phase at Brandberg West. The addition of tungsten and copper to
our critical metals' portfolio complements our strategy to becoming a
developer of multiple critical metals to the energy transition and future
technological advancements. We look forward to updating all stakeholders as we
continue to develop this promising asset."
Brandberg West
The Brandberg West project is situated within exploration license EPL 5445 in
the Erongo region of Namibia. The project area is approximately 100 km from
the Uis Tin Mine, Andrada Mining's flagship asset. The historical open pit
mine at Brandberg West was owned and operated by Gold Fields Limited until
operations ceased in the 1980's, with the cessation of exploration activities
coinciding with a global collapse of the tin price.
The historical Brandberg West mine produced a tin and tungsten concentrate
with secondary copper reported but never concentrated. The mineralisation
occurs within multiple generations of quartz veins that trend mainly east -
west in the pit and northeast - southwest further north. Most of these
mineralised veins appear to be subvertical and are well exposed within the
historically mined and surrounding areas. These quartz veins are hosted by
metasediments of the Zebraputs Formation, with an overlying marble unit that
acted as an impermeable barrier to the mineralising fluids.
Exploration Programme
The exploration programme comprised 20 oriented Diamond Drill (DD) holes for a
total of 2 975m drilled. The results of the first 10 drill holes, representing
1 471 drill meters, were previously reported (See announcement released on 12
September 2024), revealing grades of up to 4% for tin, over 2% for tungsten
and typically 0.5% - 2% for copper. This announcement pertains to the
remaining 10 holes, comprising 1 504 drill meters. This drill programme
investigated the subsurface continuity and metal endowment of the quartz veins
within the historical pit as well as the mineralised extensions identified at
surface to the north. All holes were drilled at dip angles of either 60° or
45° to target the sub - vertical mineralised quartz veins. These
intersections indicate apparent widths, which are greater than true widths due
to the angle of intersection. This programme demonstrates that high grade
mineralisation occurs within the existing pit and extends to the north.
The metals reported herein, namely Sn, W and Cu, are the primary focus of this
drilling campaign. The historical operations did not produce any copper
concentrate - however, because of its strong correlation with tin and
tungsten, future metallurgical investigation will evaluate the recovery of all
three metals. It is noteworthy that anomalous concentrations of silver and
gallium were also identified in several of the analysed samples. The economic
potential of these metals will be investigated as the project evolves. The
results of this programme will be utilised to produce an updated geological
model that will form the basis for follow-up exploration programmes. In the
table below, lithology describes the dominant rock unit for each sample - in
most instances where the lithology is listed as a schist the presence of
smaller quartz veins or greisen have been logged as secondary units.
Table: Mineralised drill intersections from this programme. The reported
intersections were selected using a 0.2% cut off for Sn, W and Cu combined.
Where multiple samples were taken from a single quartz vein, the results were
combined to provide a length-weighted average grade for the vein.
Hole ID Dip Angle (Degrees) From - To Length (m) Lithology Sn (%) W (%) Cu (%)
AT3 01 -60 18.42 - 18.74 0.32 Quartz vein 0.23 0.02 0.65
20.38 - 21.05 0.67 Schist 0.04 0.07 0.26
24.07 - 24.42 0.35 Quartz vein 0.62 0.01 0.26
25.38 - 26.23 0.85 Quartz vein 0.40 0.39 0.17
27.97 - 28.29 0.32 Quartz vein 0.87 0.01 0.21
28.85 - 30.73 1.88 Quartz vein 0.17 0.00 0.55
43.79 - 45.02 1.23 Quartz vein 0.88 0.31 0.33
48.94 - 49.33 0.39 Quartz vein 0.14 0.59 1.02
61.11 - 61.48 0.37 Quartz vein 0.18 2.73 0.53
63.88 - 64.14 0.27 Quartz vein 0.06 0.33 0.10
68.61 - 68.96 0.35 Quartz vein 4.50 0.03 0.18
82.79 - 83.20 0.41 Quartz vein 0.03 0.04 0.23
84.26 - 84.49 0.23 Schist 0.01 0.07 0.41
89.77 - 90.01 0.25 Quartz vein 1.01 0.01 0.27
93.83 - 94.28 0.45 Quartz vein 0.23 0.07 0.07
95.27 - 96.27 1.00 Schist 0.01 0.84 0.01
AT3 04 -45 7.98 - 9.00 1.02 Quartz vein 0.08 0.06 0.45
9.92 - 12.17 2.25 Quartz vein 0.10 0.60 1.58
29.19 - 29.48 0.29 Quartz vein 0.07 0.00 0.24
38.53 - 39.15 0.62 Quartz vein 0.03 0.02 0.93
44.39 - 47.60 3.21 Quartz vein 0.98 0.11 0.38
47.81 - 49.90 2.09 Quartz vein 0.80 1.23 0.16
66.16 - 66.74 0.58 Quartz vein 1.75 0.78 0.24
67.74 - 68.30 0.56 Quartz vein 0.41 0.01 0.27
71.16 - 72.04 0.88 Quartz vein 0.03 0.02 0.30
103.39 - 104.32 0.93 Quartz vein 0.43 0.52 1.25
107.48 - 109.20 1.72 Quartz vein 0.07 0.01 0.51
119.12 - 119.78 0.66 Quartz vein 0.87 3.53 0.38
122.10 - 122.89 0.79 Quartz vein 0.74 1.39 0.76
124.09 - 124.94 0.85 Quartz vein 0.06 0.44 0.04
Hole ID Dip Angle (Degrees) From - To Length (m) Lithology Sn (%) W (%) Cu (%)
AT3 06 -60 6.40 - 9.00 2.60 Quartz vein 0.05 0.01 0.24
18.96 - 19.90 0.94 Quartz vein 0.27 0.05 0.71
33.39 - 36.03 2.64 Quartz vein 0.69 0.04 0.40
47.68 - 47.96 0.28 Quartz vein 0.02 0.03 0.31
55.28 - 55.94 0.66 Quartz vein 1.40 0.85 0.29
77.89 - 78.88 0.99 Quartz vein 0.05 0.01 1.21
80.14 - 80.56 0.42 Quartz vein 0.01 2.90 0.43
84.45 - 85.31 0.86 Quartz vein 0.19 0.32 1.20
94.59 - 95.60 1.01 Quartz vein 0.05 0.01 0.33
96.41 - 98.08 1.67 Quartz vein 0.03 0.01 0.72
130.07 - 131.07 1.00 Quartz vein 6.07 1.56 1.11
138.76 - 140.00 1.24 Quartz vein 0.68 0.45 0.39
145.98 - 147.88 1.90 Quartz vein 0.04 0.01 0.25
149.86 - 151.73 1.87 Quartz vein 0.26 0.11 0.75
AT3 07 -60 4.37 - 4.79 0.42 Quartz vein 0.50 1.85 1.28
9.12 - 10.10 0.98 Quartz vein 0.18 0.25 0.33
14.50 - 14.81 0.31 Quartz vein 7.37 1.04 0.76
22.28 - 23.04 0.76 Quartz vein 0.33 0.13 1.15
25.40 - 26.26 0.86 Quartz vein 0.94 0.54 1.04
32.17 - 32.56 0.39 Quartz vein 0.45 0.55 0.59
34.02 - 34.65 0.63 Quartz vein 1.01 0.02 0.11
37.93 - 38.61 0.68 Quartz vein 2.32 1.64 0.79
50.14 - 50.42 0.28 Quartz vein 0.05 1.85 0.54
62.23 - 62.68 0.45 Quartz vein 0.02 0.02 0.39
71.00 - 71.52 0.52 Schist 0.05 0.04 0.28
92.28 - 92.74 0.46 Quartz vein 0.03 1.41 0.36
94.37 - 95.40 1.03 Schist 0.21 0.07 0.06
99.00 - 100.00 1,00 Schist 0.06 0.79 0.05
106.32 - 107.51 1.19 Quartz vein 0.06 0.01 0.52
119.39 - 120.39 1,00 Schist 0.22 0.00 0.01
127.08 - 127.36 0.28 Quartz vein 0.02 0.05 0.20
132.94 - 133.95 1.01 Quartz vein 0.30 0.58 0.08
139.89 - 140.19 0.30 Quartz vein 0.03 0.01 0.68
151.02 - 151.27 0.25 Quartz vein 10.55 1.06 0.17
163.56 - 163.88 0.32 Quartz vein 0.11 0.01 0.80
177.35 - 177.74 0.39 Quartz vein 0.42 0.96 0.54
182.71 - 183.06 0.35 Quartz vein 0.08 0.01 0.64
188.12 - 188.46 0.34 Quartz vein 0.06 0.35 0.49
197.00 - 198.00 1.00 Schist 0.26 0.02 0.05
199.86 - 200.26 0.40 Quartz vein 0.28 0.32 1.21
Hole ID Dip Angle (Degrees) From - To Length (m) Lithology Sn (%) W (%) Cu (%)
AT3 08 -60 22.08 - 23.32 1.24 Quartz vein 0.67 0.15 0.21
30.59 - 32.12 1.53 Quartz vein 0.15 0.23 0.26
35.17 - 35.51 0.34 Quartz vein 0.11 0.02 0.86
44.45 - 45.45 1.00 Schist 0.31 0.09 0.05
46.96 - 47.85 0.89 Quartz vein 0.12 0.97 0.59
59.25 - 60.09 0.84 Quartz vein 0.02 0.00 0.47
70.00 - 70.79 0.79 Quartz vein 0.03 0.01 0.30
76.31 - 77.43 1.12 Quartz vein 0.05 0.01 0.43
90.30 - 90.56 0.26 Quartz vein 0.05 0.01 1.47
92.50 - 93.06 0.56 Quartz vein 0.38 0.02 1.89
114.28 - 114.58 0.30 Quartz vein 0.02 0.00 0.37
142.65 - 143.19 0.54 Quartz vein 0.02 0.53 0.15
146.56 - 146.82 0.26 Quartz vein 0.01 0.00 0.21
148.53 - 149.18 0.65 Quartz vein 0.04 0.00 0.25
AT3 09 -60 3.66 - 4.01 0.35 Quartz vein 0.10 0.14 0.78
29.90 - 30.16 0.26 Quartz vein 0.13 0.11 0.38
49.84 - 50.12 0.28 Quartz vein 1.67 0.03 0.25
AT3 18 -60 18.69 - 22.34 3.65 Quartz vein 0.03 0.75 0.33
53.57 - 56.60 3.03 Quartz vein 0.64 0.14 1.29
69.81 - 70.54 0.73 Quartz vein 0.02 0.04 0.29
83.30 - 84.47 1.17 Schist 0.02 0.21 0.34
85.50 - 86.45 0.95 Quartz vein 0.01 0.04 0.67
95.47 - 95.97 0.50 Quartz vein 0.02 0.00 0.20
110.24 - 110.65 0.41 Quartz vein 0.03 0.00 0.70
130.96 - 131.64 0.68 Quartz vein 0.02 0.00 0.49
158.67 - 159.64 0.97 Schist 1.11 0.01 0.15
AT3 19 -60 9.08 - 9.51 0.43 Quartz vein 0.19 0.00 0.35
16.35 - 16.59 0.24 Quartz vein 0.07 0.00 1.02
24.00 - 24.93 0.93 Schist 0.53 0.03 0.11
32.87 - 34.00 1.13 Schist 0.39 0.00 0.03
41.28 - 42.31 1.03 Schist 0.26 0.17 0.07
97.03 - 98.03 1.00 Schist 0.03 0.03 0.20
99.03 - 99.37 0.34 Quartz vein 0.05 0.06 1.95
100.05 - 100.56 0.51 Quartz vein 1.16 0.04 0.59
100.91 - 102.21 1.30 Quartz vein 0.03 0.02 0.37
115.50 - 116.49 0.99 Schist 0.26 0.01 0.01
137.33 - 138.70 1.37 Schist 0.22 0.11 0.68
Hole ID Dip Angle (Degrees) From - To Length (m) Lithology Sn (%) W (%) Cu (%)
139.00 - 140.23 1.23 Schist 0.14 0.09 0.24
140.72 - 145.68 4.96 Schist 0.86 0.09 0.46
152.00 - 152.88 0.88 Schist 0.04 0.46 0.15
154.00 - 155.18 1.18 Schist 0.04 0.05 0.22
173.82 - 175.00 1.18 Schist 0.93 0.56 0.25
AT3 20 -60 6.31 - 7.25 0.94 Quartz vein 0.06 1.04 0.64
11.38 - 12.15 0.77 Schist 0.01 0.28 0.03
14.55 - 15.52 0.97 Schist 0.01 0.27 0.01
23.68 - 23.93 0.25 Quartz vein 1.69 0.14 0.07
25.16 - 25.58 0.42 Quartz vein 0.69 1.26 0.38
31.78 - 32.24 0.46 Quartz vein 0.01 0.22 0.08
33.24 - 34.06 0.82 Schist 0.01 0.30 0.01
59.87 - 60.33 0.46 Schist 0.22 0.29 0.34
65.12 - 65.60 0.48 Quartz vein 0.01 0.21 0.10
70.10 - 71.72 1.62 Quartz vein 0.03 0.00 0.25
84.09 - 85.46 1.37 Quartz vein 0.19 1.54 0.30
91.35 - 92.19 0.84 Quartz vein 0.05 0.83 0.81
103.18 - 103.66 0.48 Schist 0.27 0.03 0.12
105.70 - 105.95 0.25 Quartz vein 0.04 0.00 0.20
118.60 - 118.86 0.26 Quartz vein 0.04 0.03 0.22
148.93 - 149.58 0.65 Schist 1.49 1.79 0.13
AT5 14 -60 1.00 - 1.32 0.32 Quartz vein 0.01 0.02 0.23
7.14 - 7.69 0.55 Quartz vein 0.02 0.00 0.23
14.20 - 14.47 0.27 Quartz vein 0.06 1.11 0.81
32.35 - 32.78 0.43 Quartz vein 0.02 0.06 0.25
39.19 - 39.42 0.23 Quartz vein 0.21 0.08 0.64
58.60 - 60.50 1.90 Quartz vein 0.11 0.42 0.41
60.50 - 61.24 0.74 Quartz vein 0.07 0.38 0.21
89.50 - 89.90 0.40 Quartz vein 0.77 0.03 0.18
Downhole orientation surveys were undertaken for each hole after drilling
using a magnetic deviation probe that collected readings at two metre
intervals. Collar locations were surveyed using a differential GPS. Veins that
did not meet the metal content cut off criteria have not been reported as they
are not currently considered to be of economic significance.
Each drill hole was geologically and structurally logged and sampled as half
core. The sampling programme attempted to follow geological contacts while
also maintaining consistency in data representativity. The shortest sampled
length was 25cm while the longest length was limited to 125cm wherever
possible.
Once sampled, the material was dispatched to the laboratory for preparation
and analysis. Sample analysis was undertaken by UIS Analytical Services, a
certified independent laboratory in South Africa, using a lithium borate
fusion process. ICP-OES analysis was utilised for major and minor elements,
whereas ICP-MS was utilised for the trace elements, including Sn, W and Cu. No
top cut was applied in calculating the weighted average grades for mineralised
intersections.
Figure 1: Map displaying the localities of the reported holes. Line A-A'
indicates the cross section in Figure 2 below.
Figure 2: Section line A-A' displaying a projection of the drill hole AT3 07.
Only selected intersections in the drill hole are labelled; the complete set
of mineralised vein intersections is listed in the table above. The veins
shown have been extrapolated a small distance from the drill hole and have
been orientated in accordance with structural measurements from the core logs.
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
Mining. Prof. Robb has over 30 years of 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.
GLossary of Abbreviations
% Symbol for Percentage
Cu Symbol for Copper
DD Diamond Drilling
ICP-MS Inductively Coupled Plasma-Mass Spectrometry
ICP-OES Inductively Coupled Plasma-Optical Emission Spectrometry
QA/QC Quality Assurance / Quality Control
Sn Symbol for Tin
W Symbol for Tungsten
GLossary of technical terms
Apparent thickness The thickness of a drill hole intersection at a non-perpendicular angle to the
dip of the mineralised body, which is always greater than the true thickness
by an amount proportional to the angular difference between the intersection
trace and the perpendicular
Dip angle The angle of inclination measured downward from horizontal
Geological model An interpretation of mineralisation and host rock geology. This is usually
generated in a three-dimensional computer environment
Greisen Type of alteration characterized by micas, quartz and other accessory minerals
Quartz vein Distinct, sheet-like body of crystallized quartz within a host lithology,
formed when hydrothermal fluids precipitate minerals while circulating through
fractures or cavities.
Schist A metasedimentary unit showing pronounced foliation
Top cut The technique of restricting the grade value of outlier high-grade samples
during geostatistical averaging or estimation methodologies to prevent
overestimation
CONTACT
Andrada Mining +27 (11) 268 6555
Anthony Viljoen, CEO
Sakhile Ndlovu, Investor Relations
NOMINATED ADVISOR & BROKER
Zeus Capital +44 (0) 20 2382 9500
Katy Mitchell
Harry Ansell
Andrew de Andrade
CORPORATE BROKER & ADVISOR
H&P Advisory Limited +44 (0) 20 7907 8500
Andrew Chubb
Jay Ashfield
Matt Hasson
Berenberg +44 (0) 20 3753 3040
Jennifer Lee
Natasha Ninkov
FINANCIAL PUBLIC RELATIONS
Tavistock (United Kingdom) +44 (0) 207 920 3150
Emily Moss
andrada@tavistock.co.uk
Josephine Clerkin
About Andrada Mining Limited
Andrada Mining Limited is listed on the London Stock Exchange (AIM) with
mining assets in Namibia, a top-tier investment jurisdiction in Africa.
Andrada strives to produce critical raw materials from a large resource
portfolio, to contribute to a more sustainable future, improved living
conditions and the upliftment of communities adjacent to its operations.
Leveraging its strong foundation in Namibia, Andrada is on a strategic path to
becoming a leading African producer of critical metals including lithium, tin,
tungsten, copper and tantalum. These metals are important enablers of the
green energy transition, and essential for components of electric vehicles,
solar panels and wind turbines.
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