REG - Andrada Mining Ltd - Drill programme results for Spodumene Hill Project
06/07/2023 07:00
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RNS Number : 1002F Andrada Mining Limited 06 July 2023
6 July 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")
Drill programme results for the Spodumene Hill Project on ML129
Drill results provide indication of high-grade spodumene zones within the B1
and C1 pegmatites.
Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF), the African technology metals
mining company with a portfolio of mining and exploration assets in Namibia is
pleased to provide assay results for the inaugural drill programme undertaken
over the B1 and C1 pegmatites, located within the ML129 mining license and
referred to as the Spodumene Hill Project.
HIGHLIGHTS
· All drill holes intersected mineralised pegmatites, indicating
continuity at depth.
· Significant pegmatite intersections include:
o Drill hole B1_01: 14.52 m at 1.38% Li(2)O, 285 ppm Ta and 0.131% Sn from a
depth of 15.48 m to 30.00 m.
§ Including notable lithium intersections of 5 m at 2.32% Li(2)O from 18 m to
23 m; and 2.5m at 2.04% Li(2)O from 25.5m to 28 m.
o Drill hole B1_09: 12.78 m at 0.74% Li(2)O, 181 ppm Ta and 0.052% Sn from a
depth of 65.80 m to 78.58 m.
§ Including a notable lithium intersection of 4.66 m at 1.45% Li(2)O from 69
m to 73.66 m.
o Drill hole C1_04: 11.06 m at 0.81% Li(2)O, 1101 ppm Ta and 0.033% Sn
from a depth of 13.59 m to 24.65 m.
§ Including a notable lithium intersection of 3.65 m at 2.14% Li(2)O from 16
m to 19.65 m.
· High grade lithium intersections suggest the presence of significant
spodumene mineralisation.
· The pegmatite intersections are positive for tantalum and provide
additional upside, in the light of the near completion of the tantalum
concentration circuit.
· Metallurgical programme initiated to investigate the optimal
beneficiation process.
Anthony Viljoen, Chief Executive Officer, commented:
"These drill results provide an initial glimpse into the potential of the
Spodumene Hill Project. The identified high-grade lithium intersections within
the pegmatite could be separated through ore sorting to provide a potentially
high-grade pre-concentrate for the lithium processing plant.
These results have also highlighted the tantalum potential of this area, and
the relevance of the recently constructed tantalum recovery circuit. The
proximity of the Spodumene Hill Project to the existing operations provides an
immediate opportunity for additional revenues from the project area by
blending tantalum grades.
The highlighted intersections provide a promising starting point for the next
phase of exploration which will aim to define the extent of these zones both
laterally and with depth. We have also initiated a metallurgical programme to
investigate the optimal beneficiation process for the recovery of both lithium
and tantalum, whilst also producing tin as a by-product."
OVERVIEW OF THE RESULTS
An exploration drill programme was undertaken on the Spodumene Hill Project,
resulting in 1159 m of Diamond Drilling ("DD") being completed over seventeen
drill holes. The pegmatite intersections reported here will form the base of
an updated geological model and development of an ongoing exploration
initiative. The drill results indicate zones of lithium enrichment within the
pegmatite unit with the primary and only lithium ore mineral identified thus
far being spodumene. The construction of a lithium pilot plant and tantalum
processing circuit will assist with metallurgical investigations and the
development of an optimised process flow diagram for material from these
pegmatites.
The tabulated results (Table 1) provide the weighted average metal content of
the entire pegmatite intersection and show the selected intersections,
including those within the pegmatites. The selected intervals highlight areas
where lithium values are greater than the average indicated by the entire
pegmatite intersection and indicate that these pegmatites may contain zones of
elevated lithium mineralisation. Future work programmes will investigate the
nature and origin of these higher-grade zones within the pegmatite, with the
aim of identifying extensions and additional occurrences.
Table 1: Exploration results of diamond drill holes indicating the full
pegmatite intersections, grade and selected internal intersections. The drill
holes were oriented with an inclination of 60 degrees, intersections are
indicative of apparent thickness and not true thickness.
Hole ID Pegmatite From - To (m) Interval (m) Grade
Li₂O (%) Ta (ppm) Sn (%)
B1 01 B1 15.48 - 30.00 14.52 1.38 285 0.131
Including 18.00 - 23.00 5.00 2.32 159 0.124
Including 25.50 - 28.00 2.50 2.04 161 0.216
B1 02 B1 17.44 - 51.35 33.91 0.22 187 0.093
B1 03 B1 13.08 - 39.55 26.47 0.38 169 0.080
B1 04 B1 6.93 - 32.18 25.25 0.45 147 0.072
Including 10.00 - 13.00 3.00 1.25 133 0.052
B1 05 B1 20.10 - 37.18 17.08 0.47 110 0.070
Including 22.15 - 28.00 5.85 0.91 105 0.111
B1 06 B1 53.75 - 71.50 17.75 0.22 147 0.119
B1 07 B1 74.84 - 85.64 10.80 0.44 119 0.049
Including 79.00 - 80.00 1.00 1.86 151 0.045
B1 08 B1 52.61 - 61.95 9.34 0.18 166 0.083
B1 09 B1 4.60 - 62.32 57.72 0.19 352 0.076
B1 Lower 65.80 - 78.58 12.78 0.74 181 0.052
Including 69.00 - 73.66 4.66 1.45 116 0.088
C1 01 C1 10.00 - 20.65 10.65 0.26 243 0.062
C1 02 C1 11.15 - 18.1 6.95 0.48 426 0.066
Including 15.97 - 17.46 1.49 0.99 803 0.052
C1 03 C1 13.50 - 28.26 14.76 0.20 343 0.037
C1 04 C1 13.59 - 24.65 11.06 0.81 1101 0.033
Including 16.00 - 19.65 3.65 2.14 2742 0.057
C1 05 C1 45.68 - 52.76 7.08 0.09 233 0.026
C1 06 C1 53.64 - 59.91 6.27 0.44 163 0.049
Including 55.00 - 56.50 1.50 1.20 212 0.074
C1 07 C1 43.21 - 46.17 2.96 0.02 304 0.020
C1 08 C1 14.00 - 37.6 23.60 0.25 463 0.045
Including 18.00 - 22.00 4.00 0.92 129 0.021
All drill holes were drilled as DD at an inclination of sixty degrees from the
horizontal. In all instances, apart from drill holes B1 09 and C1 08, the
holes were planned to intersect the pegmatite perpendicular to the surface
strike direction. Due to the undulating dip angle of the pegmatite units the
intersections are assumed to be an indication of apparent thickness, which is
greater than true thickness.
Other minor pegmatites identified in the drill hole, have not been reported on
because they are not considered to be of economic significance. Each drill
hole was geologically and geotechnically logged before being sampled. The
sample analysis was undertaken by UIS Analytical Services, a certified
independent laboratory, using a peroxide fusion. ICP-OES analysis was utilised
for major and minor elements and ICP-MS utilised for the trace elements. No
top cut has been applied when calculating the weighted average grades for
anomalously rich intersections.
Figure 1: Maps of the programme indicating: A) The localities of the pegmatites in relation to each other, the holes drilled during this programme and the main road linking Uis and Henties Bay. B) The mapped outcrop areas of the B1 pegmatite and location of the drill holes for this programme and indicating the locality of the section line in Figure 2. C) The mapped pegmatite outcrop area and location of the C1 location of the drill holes.
Figure 2: Cross section through line A-A' as indicated in Figure 1B, showing the average grade of the whole intersection and the two selected intersections within the pegmatite as indicated in Table 1.
COMPETENT PERSON STATEMENT
The technical data relating to the exploration results in this announcement
have been reviewed by Professor Laurence Robb (M.Sc.,PhD; FGSSA, FSEG, CGeol.,
Pr. Sci Nat. (Geological Sciences)), who is Visiting Professor at the
University of Oxford and University of Johannesburg. Professor Robb is a
non-executive director of Andrada Mining and has over 40 years of experience
working in many of the great African mineral districts, including the
Witwatersrand Basin, the Bushveld Complex, Barberton, Namaqualand, and the
Birimian of West Africa. He also undertook extensive research into the
metallogeny of southeast Asia (Malaysia and Myanmar). Professor Robb consents
to the inclusion of the information in the form and context in which it
appears.
Glossary of abbreviations
DD Diamond Drilling
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
QA/QC Quality Assurance / Quality Control
Sn Symbol for Tin
Ta Symbol for Tantalum
Glossary of terminology
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
mineralisation. 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 and systematically variable 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, including monomineralic zones.
_______________________________________________________________________________________
Andrada Mining Limited +27 (11) 268 6555
Anthony Viljoen, CEO investorrelations@andradamining.com
Sakhile Ndlovu, Head of Investor Relations
Nominated Adviser +44 (0) 207 220 1666
WH Ireland Limited
Katy Mitchell
Corporate Advisor 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
Callum Stewart
Varun Talwar
Tavistock Financial PR (United Kingdom) +44 (0) 207 920 3150
Emily Moss andrada@tavistock.co.uk
Catherine Drummond
Adam Baynes
About Andrada Mining Limited
Andrada Mining Limited has 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.
Andrada has three mining licences namely;
· ML134 on which Uis Mine is located.
· ML133 (Nai Nais / Lithium Ridge).
· ML129 (B1C1 / Spodumene Hill).
The main minerals in these mining licences are tin, lithium and tantalum.
Additionally, the Company has an exploration licence EL5445 (Brandberg West)
on which the main minerals are tin, copper and tungsten. The Company has set a
mineral resource target of 200 Mt to be delineated within the next 5 years.
The 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 deep 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 how 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
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