REG - Andrada Mining Ltd - Exploration Update on ML133 (Lithium Ridge)
29/08/2023 07:00
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RNS Number : 6380K Andrada Mining Limited 29 August 2023
29 August 2023
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")
Exploration Update on ML133 ("Lithium Ridge")
Results of infill channel sampling confirm lithium mineralisation and define
mineralised zone.
Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF), an African technology metals
mining company with a portfolio of mining and exploration assets in Namibia,
is pleased to provide lithium assay results for a channel sampling and
geological mapping programme undertaken within the ML133 mining license area
("Lithium Ridge") located approximately 35km southeast of the Uis mine.
The exploration programme aimed to fill in data gaps between known lithium
occurrences within our existing mining licence ML133 and define the width and
length of the mineralised trend. A detailed geological mapping programme was
also undertaken to delineate the extent of the pegmatites at surface and to
document the mineral characteristics of the intrusions in preparation for a
more detailed follow up programme.
HIGHLIGHTS
§ When combined, the weighted average of the 27 highest lithium grade channel
lines amount to 179 m at 1.20% Li(2)O (Refer to Table 1).
§ Notable results for channel samples across the entire pegmatite include:
o 9.65 m with an average grade of 2.18% Li(2)O, 0.18% Sn and 89 ppm Ta
o 12.76 m with an average grade of 1.87% Li(2)O, 0.15% Sn and 61 ppm Ta
o 15.29 m with an average grade of 1.60% Li(2)O, 0.18% Sn and 57 ppm Ta
o 4.50 m with an average grade of 1.54% Li(2)O, 0.11% Sn and 61 ppm Ta
o 10.01 m with an average grade of 1.35% Li(2)O, 0.08% Sn and 41 ppm Ta
o 11.73 m with an average grade of 1.32% Li(2)O, 0.18% Sn and 99 ppm Ta
§ This data confirms the existence of continuous mineralisation at surface
over a 6 km strike length.
§ The primary lithium minerals identified are spodumene and petalite.
§ First saleable grade of Lithium from the licence produced in May 2023.
Anthony Viljoen, Chief Executive Officer, commented:
"I am very encouraged by results received to date from the regional
exploration programme, highlighting the potential upside of our mining licence
portfolio. Lithium mineralisation has to date, now been identified within the
pegmatites in all our mining licences. In several cases, Andrada has been at
the forefront of identifying and reporting the presence of significant lithium
concentrations within these pegmatite swarms in the region. The channel
sampling results confirm the continuity of notable lithium, tin, and tantalum
mineralisation over a significant strike length.
These results, together with and the bulk test work programme at the newly
constructed Pilot facility, will allow the Andrada team to expedite the
concurrent development of the Lithium Ridge licence.
We look forward to receiving the results of the initial RC drill programme
which was implemented to investigate the continuity of Lithium Ridge's
pegmatites and their associated mineralisation at depth. This work continues
to confirm our belief that the geology of the Erongo region, plays host to a
burgeoning critical metals province in Namibia. As we increase and diversify
production at Uis, we are also striving to discover and define additional
tech-metals resources with the potential to develop into standalone
operations."
Project Location
This report relates to an exploration programme implemented within the ML133
mining license, situated approximately 35km south-east of the Uis Mine along
the D1903 road that links to the B2 connecting Windhoek and Swakopmund. The
license area is within the NaiNais - Kohero pegmatite belt and where the
former tin and tantalum-rich TinTan mine was situated.
Overview of results
This exploration programme comprised 129 separate channel lines which were cut
over 99 individual pegmatites. The programme was undertaken in conjunction
with detailed geological mapping of the pegmatites in the areas between
existing datasets obtained in 2022.
The results of this infill channel sampling programme reveal a 6km long trend
following a ridgeline where pegmatites contain elevated lithium values. To
better define the width of this trend, the outcropping pegmatites on either
side of the described bodies were also sampled (Refer to Appendix A for the
entire dataset) and they reveal a well-defined area with enriched lithium
values. These results also demonstrate that, while lithium, tin and tantalum
enrichments all occur together in this area, there are other areas where they
occur separately. The weighted average grade of the sample lines selected for
this report indicates the presence of mineralised pegmatite over an interval
of 179m, at a value of 1.20% Li(2)O.
In conjunction, a Reverse Circulation ("RC") drilling programme was initiated
in the first quarter of this calendar year within the same area, to
investigate the continuation and mineralisation of selected pegmatites below
surface. All drill holes successfully intersected pegmatites at depth
providing valuable information about the potential morphology of these
intrusions and have been sampled for chemical analysis. The first batch of
results from the drill programme are imminent, following which Andrada will
implement additional drill programmes to prove continuity along strike and to
investigate extensions at depth.
Some of the lower grade composites may incorporate higher-grade samples and,
as a result, additional investigations will be undertaken to enhance our
understanding of the data obtained by this sampling programme. The primary
lithium-bearing minerals identified during this programme were petalite and
spodumene, in some instances both these minerals were found to occur within
the same pegmatite unit.
Table 1: Selected results from the chip sampling programme on mining license
ML133. The entire dataset is in Appendix A.
Sample Line Pegmatite Length (m) Grade
Li(2)0 (%) Sn (%) Ta (ppm)
T018 P154 9.65 2.18 0.18 89
T083A P193 12.67 1.87 0.15 61
T084 P163 15.29 1.60 0.18 57
T055A P193 4.50 1.54 0.11 89
T085 P163 4.00 1.50 0.21 81
T020 P4b 6.30 1.38 0.08 41
T029 P182 10.01 1.35 0.08 41
T016 P2 3.95 1.33 0.11 112
T088 P158 11.73 1.32 0.18 99
T093C P45 2.00 1.26 0.26 96
T083B P193 3.75 1.21 0.30 76
T086 P158 3.85 1.21 0.15 73
T058D P240 2.01 1.20 0.40 85
T013 P2 4.78 1.19 0.13 123
T031 P194 5.63 1.13 0.21 90
T010 P247 3.34 1.11 0.06 189
T055C P218 4.85 0.97 0.17 99
T093A P45 16.68 0.88 0.19 60
T02B P34 7.50 0.87 0.14 75
T025 P168 3.24 0.85 0.25 150
T058C P240 1.63 0.77 0.23 109
T009 P138 2.39 0.74 0.10 60
T061 P22 15.00 0.73 0.06 67
T058A P240 2.87 0.72 0.81 115
T012 P1 2.92 0.71 0.19 101
T092 P43 15.00 0.70 0.13 106
T008 P253 3.50 0.69 0.09 58
Total: 179.04 1.20 0.16 81
For this exploration programme, 692 individual samples derived from 129
channels were acquired, and included nine grab samples. Wherever possible each
channel sample was taken to reflect a one metre horizontal interval within the
pegmatite body. Where xenoliths of the host rock occur, these units were
sampled individually. Each channel was cut with a diamond saw and chiselled
free, to be collected in individual sample bags, with a minimum of 20 kg of
material obtained for each sample. The samples were processed and then
analysed for their elemental content by ICP-MS and ICP-OES methods at UIS
Analytical Services, a certified independent laboratory in South Africa.
The sample points were surveyed with a differential GPS, yielding a 4cm
accuracy in the horizontal plane and 8cm in the vertical plane. The GPS data
were used to validate the length intervals recorded for each sample.
Figure 1: The distribution of identified pegmatite bodies on ML133 overlain on
a satellite image.
Figure 2: Weighted average lithium grades at ML133 for pegmatites mapped and
sampled during the 2022 and 2023 exploration programmes. The mineralized ridge
line is demarcated by samples with the multi-coloured points.
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
mineral 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 and results for this programme.
Glossary of abbreviations
GPS Global Positioning System
ICP-MS Inductively Coupled Plasma-Mass Spectrometry
ICP-OES Inductively Coupled Plasma-Optical Emission Spectrometry
Li Symbol for Lithium
Li → Li(2)O Metal to metal-oxide conversion factor of 2.153
Li(2)O Lithium oxide
PPM Parts Per Million
RC Reverse Circulation
Sn Symbol for Tin
Ta Symbol for Tantalum
Andrada Mining Limited +27 (11) 268 6555
Anthony Viljoen, CEO investorrelations@andradamining.com
Sakhile Ndlovu, Investor Relations
Nominated Adviser
WH Ireland Limited +44 (0) 207 220 1666
Katy Mitchell
Corporate Adviser and Joint Broker
H&P Advisory Limited +44 (0) 20 7907 8500
Andrew Chubb
Jay Ashfield
Matt Hasson
Stifel Nicolaus Europe Limited +44 (0) 20 7710 7600
Ashton Clanfield
Calum Stewart
Varun Talwar
Tavistock Financial PR (United Kingdom) +44 (0) 207 920 3150
Jos Simson andrada@tavistock.co.uk
Catherine Drummond
Adam Baynes
__________________________________________________________________________________
About Andrada Mining Limited
Andrada Mining Limited, formerly Afritin Mining Limited, is a London-listed
technology metals mining company with a vision to create a portfolio of
globally significant, conflict-free, production and exploration assets. The
Company's flagship asset is the Uis Mine in Namibia, formerly the world's
largest hard-rock open cast tin mine.
An exploration drilling programme is currently underway with the aim of
expanding the tin resource over the fourteen additional, historically mined
pegmatites, all of which occur within a 5 km radius of the current processing
plant. The Company has set a mineral resource target of 200 Mt to be
delineated within the next 5 years. The existing mine, together with
substantial mineral resource potential, allows the Company to consider
economies of scale.
Andrada is managed by a board of directors with extensive industry knowledge
and a management team with extensive commercial and technical skills.
Furthermore, the Company is committed to the sustainable development of its
operations and the growth of its business. This is demonstrated by the manner
in which the leadership team places significant emphasis on creating value for
the wider community, investors, and other key stakeholders. Andrada has
established an environmental, social and governance system which has been
implemented at all levels of the Company and aligns with international
standards. END
Appendix 1
Table 2: Channel sample results from the exploration programme to date. The
values represent the weighted average of the pegmatite intersections
indicated. Where country rock xenoliths were intersected the lower values were
included in the calculations.
Sample Line Pegmatite Length (m) Grade
Li(2)0 (%) Sn (%) Ta (ppm)
T001 P248 9.40 0.04 0.01 27
T002 P24 10.73 0.05 0.03 48
T003 P248b 3.55 0.04 0.03 34
T004 P249 6.50 0.03 0.02 37
T005 P250 15.95 0.04 0.01 16
T006 P251 3.00 0.14 0.17 95
T007 P252 2.43 0.26 0.35 151
T008 P253 3.50 0.69 0.09 58
T009 P138 2.39 0.74 0.10 60
T010 P247 3.34 1.11 0.06 189
T011 P254 0.80 0.01 0.29 82
T012 P1 2.92 0.71 0.19 101
T013 P2 4.78 1.19 0.13 123
T014A P154a 7.18 0.17 0.16 63
T014B P154b 2.59 0.11 0.16 90
T014C P154 1.47 0.06 0.07 107
T015 P3 19.28 0.05 0.02 19
T016 P2 3.95 1.33 0.11 112
T017 P2 2.00 0.09 0.06 146
T018 P154 9.65 2.18 0.18 89
T019 P4a 8.00 0.61 0.07 99
T020 P4b 6.30 1.38 0.08 41
T021 P5 1.26 0.24 0.24 265
T022 P6 5.47 0.11 0.10 61
T023 P7 1.74 0.20 0.07 173
T024 P7b 2.90 0.10 0.02 24
T025 P168 3.24 0.85 0.25 150
T026 P178 2.00 0.02 0.01 11
T027 P169 3.98 0.44 0.43 154
T028 P170 3.66 0.56 0.39 89
T029 P182 10.01 1.35 0.08 41
T02B P34 7.50 0.87 0.14 75
T02C P34 5.00 0.18 0.10 86
T030 P8 1.65 0.01 0.14 131
T031 P194 5.63 1.13 0.21 90
T032 P182 1.72 0.10 0.12 117
T032A P182 3.00 0.09 0.14 73
T033 P9 0.72 0.02 0.03 40
Sample Line Pegmatite Length (m) Grade
Li(2)0 (%) Sn (%) Ta (ppm)
T034 P181 7.28 0.04 0.01 19
T035 P181 1.00 0.02 0.01 13
T036 P184 3.54 0.02 0.02 25
T037 P180 5.21 0.03 0.01 25
T038 P10 5.40 0.01 0.01 250
T039 P11 1.40 0.00 0.00 8
T040 P12 1.41 0.00 0.01 6
T041 P13 0.82 0.00 0.01 11
T042 P14 1.90 0.01 0.00 10
T043 P15 1.90 0.00 0.00 6
T044 P16 10.00 0.01 0.00 4
T045 P17 3.60 0.00 0.00 3
T047 P18 5.60 0.00 0.01 6
T054 P204 4.00 0.02 0.02 31
T055A P193 4.50 1.54 0.11 89
T055B P214 1.82 0.60 0.53 116
T055C P218 4.85 0.97 0.17 99
T055D P218 4.61 0.30 0.12 197
T056 P19 3.77 0.07 0.01 24
T057 P20 1.30 0.11 0.19 61
T058A P240 2.87 0.72 0.81 115
T058B P240 1.56 0.61 0.15 65
T058C P240 1.63 0.77 0.23 109
T058D P240 2.01 1.20 0.40 85
T059 P241 4.00 0.07 0.02 21
T060 P21 7.76 0.03 0.02 59
T061 P22 15.00 0.73 0.06 67
T063 P24 4.00 0.01 0.03 50
T064 P23 2.54 0.00 0.01 8
T065A P25 1.26 0.00 0.01 14
T065B P26 2.00 0.00 0.01 34
T066 P27 4.38 0.00 0.01 22
T067 P28 3.80 0.02 0.01 38
T068 P29 3.00 0.02 0.01 82
T068B P30 13.30 0.01 0.01 41
T069 P31 3.00 0.03 0.02 40
T070 P32 8.11 0.32 0.14 75
T071 P33 1.00 0.29 0.19 175
T072A P35 9.70 0.06 0.02 54
T073 P36 4.55 0.04 0.02 55
T076 P39 5.36 0.02 0.00 33
T076B P40 4.94 0.01 0.01 34
T078 P232 2.00 0.02 0.06 29
T079 P231 4.80 0.10 0.14 51
T080 P219 9.00 0.01 0.01 24
Sample Line Pegmatite Length (m) Grade
Li(2)0 (%) Sn (%) Ta (ppm)
T081A P41 14.70 0.02 0.01 14
T081B P41 2.00 0.02 0.01 21
T082 P42 5.40 0.01 0.01 10
T083A P193 12.67 1.87 0.15 61
T083B P193 3.75 1.21 0.30 76
T084 P163 15.29 1.60 0.18 57
T085 P163 4.00 1.50 0.21 81
T086 P158 3.85 1.21 0.15 73
T087 P160 3.93 0.42 0.11 145
T088 P158 11.73 1.32 0.18 99
T089 P46 2.00 0.22 0.05 61
T090 P47 2.57 0.29 0.08 136
T091 P48 1.22 0.04 0.15 166
T092 P43 15.00 0.70 0.13 106
T092A P57 1.47 0.33 0.12 158
T092B P43 2.40 0.31 0.13 151
T093A P45 16.68 0.88 0.19 60
T093B P45 1.91 0.38 0.17 73
T093C P45 2.00 1.26 0.26 96
T094 P54 2.58 0.52 0.13 138
T095 P55 2.33 0.07 0.15 113
T095B P56 2.40 0.04 0.02 29
T095C P58 1.34 0.01 0.08 48
T096 P59 0.71 0.01 0.08 69
T097 P60 1.00 0.00 0.03 55
T098 P61 2.00 0.01 0.08 37
T099 P62 1.63 0.20 0.15 103
T100 P63 1.34 0.02 0.14 43
T101 P64 1.90 0.04 0.03 30
T102 P240 3.95 0.14 0.13 161
T103 P65 1.50 0.00 0.10 159
T104 P35 1.50 0.02 0.03 39
T105 P32 2.60 0.11 0.20 89
T106 P241 3.90 0.07 0.10 108
T107 P43 6.42 0.02 0.01 51
T108A P42 1.71 0.01 0.01 11
T108B P42 3.00 0.02 0.01 16
T109 P44 4.00 0.01 0.00 10
T111 P210 5.83 0.02 0.01 21
T112 P24 3.00 0.06 0.03 41
T113 P27 6.93 0.50 0.12 51
T114 P66 2.25 0.01 0.06 33
T115 P67 3.44 0.58 0.23 195
T201 P68 2.70 0.41 0.52 192
T202A P243 6.00 0.19 0.20 83
Sample Line Pegmatite Length (m) Grade
Li(2)0 (%) Sn (%) Ta (ppm)
T202B P243 2.90 0.08 0.20 58
Grab Sample 1 3.92 0.01 83
Grab Sample 2 0.30 0.18 1476
Grab Sample 3 0.21 0.14 209
Grab sample 4 0.05 0.03 77
Grab Sample 5 1.88 0.19 2676
Grab Sample 6 0.03 0.00 56
Grab Sample 7 1.37 0.08 197
Grab Sample 8 0.11 0.11 3008
Grab Sample 9 0.09 0.09 1871
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