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viewAfriTin Mining Ltd

Maiden JORC resource at Uis

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RNS Number : 3635M
AfriTin Mining Ltd
16 September 2019
 

16 September 2019

AfriTin Mining Limited

("AfriTin" or the "Company")

Uis Exploration Drilling Update - Maiden JORC resource

AfriTin Mining Limited (AIM: ATM), a mining company with a portfolio of near production tin assets in Namibia and South Africa, with its flagship asset, the Uis Tin Mine ("Uis") in Namibia, is pleased to provide an update on the drilling programme designed to support the historical Mineral Resource estimate of the V1 and V2 pegmatites.

Highlights

▪     Announcement of a maiden Measured, Indicated and Inferred Mineral Resource estimate, prepared in accordance with JORC (2012), for the Uis Tin Mine of 71.54 million tonnes of ore at a grade of 0.134 % tin for 95,539 tonnes of contained tin;

▪     An Inferred Mineral Resource estimate of 71.54 million tonnes of ore at 85 ppm tantalum for 6,091 tonnes contained tantalum (spatially coincident, to the Tin Mineral Resource); and,

▪     An Inferred Mineral Resource estimate of 71.54 million tonnes of ore at 0.63 % Lithium Oxide for 450,265 tonnes contained lithium oxide (Li2O) (spatially coincident, to the Tin Mineral Resource)

 

Anthony Viljoen, CEO of AfriTin Mining Limited commented:

 

"Confirming the historical data at Uis has always been a crucial step in the progression and development of our flagship asset. The additional down dip drilling confirmed extension and thickening of the orebody at depth affirming our belief in the scale of this deposit and increasing the resource historically stated by SRK (1989) on the V1/V2 orebody. Furthermore, the scale of this resource, from 2 pegmatites, places the tin inventory as one of the biggest of its kind in the world and encourages further development of the additional outcropping pegmatites identified within our mining licence area, of which an excess of 100 pegmatite bodies have been identified.

 

The addition of tantalum and lithium to the estimate, further enhances the attractiveness of this globally significant asset and creates an exciting opportunity for other potential revenue streams. Assays of the historical resource didn't typically capture other elements as there were no markets for these by-products at the time. However, with the advent of new technology and the battery metal boom, AfriTin has extended the inventory of potentially extractable metals at Uis to include tantalum and lithium. 

 

Importantly, today's results now provide us with the confidence to move our Phase 1 mining operation forward towards a large-scale Phase 2 operation."

 

In Q4 2018, AfriTin initiated an exploration drilling programme aimed at validating the historical information disclosed for ISCOR by SRK in 1989. The validation was done through a JORC (2012)-compliant Mineral Resource estimate for the V1 and V2 pegmatites at the Company's flagship Uis Project. The Company divided the exploration programme into two phases. The initial phase focussed on the drill holes required for the validation of the historical data, whereas the second phase focussed on exploring the down dip continuation of the V1 and V2 pegmatites, which had not been previously investigated.

The validation programme comprised 26 diamond drill holes (4,435.6 m) and was used to validate the historical data from 128 percussion drill holes (12,953.4 m) and 13 diamond drill holes (2,042.7 m) for which AfriTin has the assay data.

The completion of the validation drilling programme was announced on 20 May 2019. The Company is pleased to confirm that the results of the drilling programme successfully validated the historical exploration data generated by ISCOR in 1989, allowing for the incorporation of the existing 141 drill holes utilised in the estimation of the JORC (2012)-compliant Mineral Resources reported here.

The historical exploration data contained only information for tin.  Ancillary elements were analysed during the confirmatory drilling campaign of which tantalum and lithium were identified as having by-product potential.  Tantalum and lithium oxide have been estimated but are reported at a lower confidence level due to the smaller data set and the application of different estimation techniques.

The reported Mineral Resources are constrained by a Whittle-derived pit shell considering tin revenues exclusively.  Potential by-product tantalum and lithium occurring within this tin pit shell are reported as Inferred Mineral Resources.

Mineral Resources were estimated for tin, lithium and tantalum contained within two pegmatite orebodies referred to as the V1 and V2 pegmatites. The historical assays that had been acquired from the early ISCOR drilling (circa 1986) were compared to the new drilling, undertaken by AfriTin. This drilling was to assess and then ascertain that the two data sets are statistically, sufficiently similar to be jointly used for geostatistical analyses and Mineral Resource estimation.

The 141 holes drilled by ISCOR had been sampled and assayed for tin only, whereas the 26 AfriTin drill holes were sampled for tin, lithium and tantalum. Six of the deeper AfriTin holes testing the down dip continuity of mineralisation have been drilled and geologically logged but analytical data was not available at the time the Mineral Resource estimate was undertaken. The logged geology was utilised to define the geological model.

All samples were composited to 2 m intervals and used for geostatistical analyses and estimation. Sufficient tin composites (3 754) were available to provide robust block estimates permitting the tin Mineral Resource to be classified into Measured, Indicated and Inferred classes. Lithium and tantalum composites were lower in number (485), leading to a less robust estimate of these two elements resulting in an Inferred Mineral Resource classification.

All Mineral Resource estimates for tin, lithium and tantalum are spatially coincident with mineralisation confined to the pegmatites encountered. There has been significant extrapolation of grades, which has given rise to a large portion of the Mineral Resource, for all elements, being classified in the Inferred category. The choice of the grade estimation extrapolation parameters has been done in a way that ensures that the average of these extrapolated estimates is at a level similar to the global average grade for each element. Extrapolation has been guided by the geological model which is informed by the deeper down dip holes. The down dip drill holes have confirmed the continuation of the V1 and V2 pegmatite orebodies at depth.

Table 1: AfriTin Mining tin (Sn) Mineral Resource estimate (JORC- 2012) of the Uis Tin Mine V1 and V2 pegmatites at a cut-off grade of 0.05% Sn.

Resource Classification

Gross

Net Attributable (85%*)

Operator

Tonnes (Mt)

Sn (%)

Contained metal (t)

Tonnes (Mt)

Sn (%)

Contained metal (t)


Measured

21.54

0.139

29,899

18.31

0.139

25,414

AfriTin Mining

Indicated

13.05

0.136

17,765

11.09

0.136

15,100

AfriTin Mining

Inferred

36.95

0.130

47,875

31.41

0.130

40,694

AfriTin Mining

Total

71.54

0.134

95,539

60.81

0.134

81,208

AfriTin Mining

Source: CSA Global

Note: The constraining pit shell is based on a revenue factor of 1.5, employing a 3-year trailing average tin price of USD 20,000/t.  Ore losses and mining dilution were set at 5%. Pit slope angles were assumed to be 50° with an assumed metallurgical recovery of Sn of 80%, producing a concentrate of 60% Sn.  Mining, Treatment, G and A and Selling Costs have been supplied by AfriTin and reviewed for reasonableness by CSA Global. A Sn cut-off grade of 0.05% Sn has been applied to resources within the constrained pit.  Tabulated data have been rounded off and this may result in minor computational errors.

* AfriTin has an attributable ownership of 85% in Uis with the remaining 15% owned by The Small Miners of Uis (SMU)

Table 2: AfriTin mining Inferred resource (JORC-2012) estimate of ancillary elements within the Uis Tin Mine V1 and V2 pegmatites.

Inferred Resource

Gross

Net Attributable (85%*)

Operator

Ta (ppm)

Li2O (%)

Ta (ppm)

Li2O (%)


Grade

85

0.63

85

0.63

AfriTin Mining

Tonnes (Mt)

71.54

71.54

60.81

60.81

AfriTin Mining

Contained metal (t)

6,091

450,265

5,177

382,725

AfriTin Mining

Source: CSA Global

Note: Tabulated data have been rounded off and this may result in minor computational errors. Contained metal for lithium refers to lithium oxide (Li2O)

* AfriTin has an attributable ownership of 85% in Uis with the remaining 15% owned by The Small Miners of Uis (SMU)

 

Competent Person Statement:

The technical data in this announcement has been reviewed by Anthony Wesson of CSA Global, who provides geostatistical consulting services to AfriTin. Anthony Wesson has 45 years of industry related mineral project development experience and is a Competent Person for the reporting of Mineral Resources.  He has been a Fellow of the AusIMM for more than 20 years. He has reviewed the technical disclosures in this release and has undertaken the Mineral Resource estimation and classification for tin, lithium, and Tantalum.

Glossary of abbreviations

Li

Elemental symbol for Lithium

Li2O

Lithium oxide

Li Li2O

Conversion factor of 2.153

JORC

The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves

Mt

Millions of tonnes

PPM

Parts Per Million

Sn

Elemental symbol for Tin

t

Metric tonne

Ta

Elemental symbol for Tantalum

 

Glossary of Technical Terms

Cut-off Grade

The grade above which Mineral Resources have been reported in order to satisfy the requirements for reasonable prospects of eventual economic extraction

Geological Model

The interpretation of mineralisation and geology that controls mineralisation.  This is usually generated in a three-dimensional computer environment.

Geostatistics

A branch of statistics focussing on spatial datasets and relating to the estimation of elemental grades over a spatially modelled orebody

Indicated Mineral Resource

The part of a Mineral Resource for which quantity, grade, quality, etc., can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters, to support mine planning and evaluation of economic viability

Inferred Mineral Resource

The part of a Mineral Resource for which quantity and grade or quality can be estimated on the basis of geological evidence and limited sampling and reasonably assumed, but not verified, geological and grade continuity

Measured Mineral Resource

The part of a Mineral Resource for which quantity, grade or quality, etc., are well enough established that they can be estimated with confidence sufficient to allow the appropriate application of technical parameters to support production planning and evaluation of economic viability

Mineral Resources

Mineral Resources are sub-divided, in order of increasing geological confidence, into Inferred, Indicated and Measured categories. An Inferred Mineral Resource has a lower level of confidence than that applied to an Indicated Mineral Resource. An Indicated Mineral Resource has a higher level of confidence than an Inferred Mineral Resource but has a lower level of confidence than a Measured Mineral Resource

Pegmatite

An igneous rock typically of granitic composition, that 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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For further information, please visit www.afritinmining.com or contact:

AfriTin Limited


Anthony Viljoen, CEO

+27 (11) 268 6555

Nominated Adviser and Joint Broker


WH Ireland Limited

Katy Mitchell

Adrian Hadden

James Sinclair-Ford

+44 (0) 207 220 1666 

Corporate Advisor and Joint Broker

Hannam & Partners

Andrew Chubb

Jay Ashfield

Nilesh Patel

+44 (0) 20 7907 8500

Joint Broker


NOVUM Securities Limited

Jon Belliss

+44 (0)20 7399 9400

Financial PR (United Kingdom)


Tavistock

+44 (0) 207 920 3150

Jos Simson

Barney Hayward


 

 

About AfriTin Mining Limited

Notes to Editors

AfriTin Mining is the first pure tin company listed in London and its vision is to create a portfolio of globally significant, conflict-free, tin producing assets. The Company's flagship asset is the Uis brownfield tin mine in Namibia, formerly the world's largest hard-rock tin mine.

AfriTin is managed by an experienced board of directors and management team with a current two-fold strategy: fast track Uis brownfield tin mine in Namibia to commercial production in 2019 as phase 1, ramping up to 5,000 tonnes of concentrate in a phase 2 expansion, followed by consolidation of other quality African tin assets. The Company strives to capitalise on the solid supply/demand fundamentals of tin by developing a critical mass of tin resource inventory, achieving production in the near term and further scaling production by consolidating tin assets in Africa.


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 [email protected] or visit www.rns.com.
 
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Quick facts: AfriTin Mining Ltd

Price: 2.9355

Market: AIM
Market Cap: £18.91 m
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Full interview: AfriTin Mining's tin resource at Uis project 'one of the...

AfriTin Mining Limited's (LON:ATM) chief executive Anthony Viljoen tells Proactive London's Andrew Scott they're to move ahead with plans for a large scale operation at the Uis tin mine after a maiden resource confirmed the scale of the orebody. On a JORC basis, measured, indicated and...

on 16/9/19