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Regional Exploration Update

24 Nov 2022 07:00

RNS Number : 4250H
AfriTin Mining Ltd
24 November 2022
 

24 November 2022

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 is now considered to be in the public domain.

AfriTin Mining Limited

("AfriTin" or the "Company")

Regional Exploration Update - Lithium, Tin and Tantalum

Significant Mineralisation Potential at Surface, 35 km from Flagship Uis Mine

AfriTin Mining Limited (AIM: ATM), an African technology metals mining company with a portfolio of mining and exploration assets in Namibia, is pleased to provide an update on the exploration activities undertaken over its mining licence ML133, located approximately 35 km south-east of the Company's Uis Mine.

The exploration programme has been conducted over a 12-month period commencing in Q4 2021, and included aerial surveys, regional and high-resolution geological mapping, and surface chip sampling. The programme targeted outcropping pegmatites, many of which were found to contain lithium, tin, and tantalum.

Highlights:

 

· More than 100 pegmatites were outlined by detailed geological mapping over the licence areas of approximately 3,200 hectares;

· Sampling consisted of 79 pegmatite chip sample profiles over 64 selected pegmatites;

· Chip sample results, sampled across the width of selected pegmatites on a 1m interval, included:

13 m at 1.93% Li2O, 0.10% Sn, and 36 ppm Ta from sample line T78;

24 m at 1.65% Li2O, 0.15% Sn, and 52 ppm Ta from sample line T72;

20 m at 0.97 % Li2O, 0.12% Sn, and 172 ppm Ta from sample line T36;

14 m at 1.33% Li2O, 0.17% Sn, and 118 ppm Ta from sample line T71;

11 m at 0.93% Li2O, 0.17% Sn, and 149 ppm Ta from sample line T24;

4 m at 2.44% Li2O, 0.07% Sn, and 43 ppm Ta for sample line T76;

· The weighted average of the 20 highest lithium grade sample lines combined provides 200 m at 1.25% Li2O (composite of Table 1); and

· The Company intends to proceed with the next phase of exploration, including scout drilling, and initial metallurgical test work.

Anthony Viljoen (CEO) commented:

"We are especially excited about these initial exploration results. It confirms our belief that the pegmatites of the ML133 licence could contain significant lithium, tin and tantalum mineralisation. We intend to advance the next stage of our work programme over this area, including exploration drilling and initial metallurgical test work.

Proximity of the test area to the Uis Mine, which is our operating facility with comparable types of mineralisation, presents potential development synergies.

AfriTin's portfolio of operating and exploration assets in Namibia underpins our goal of becoming a major producer of technology metals. We believe the prospectivity of our tenements justify accelerating the exploration and development programmes aimed at realising near-term value for our stakeholders."

Locality

AfriTin's mineral licence ML133 is located approximately 35 km south-east of the Uis Mine (Figure 1). It can be accessed by road from the Uis Mine, and is also connected to the port of Walvis Bay to the south-west. It is the site of the historical Tin Tan Mine which produced tin and tantalum during the late 1980's.

Figure 1: AfriTin's Uis Mine and mineral licence locality map showing the position of ML133

Exploration Programme

Following an extensive desktop study, an exploration programme was launched over ML133, which included remote sensing to produce regional geological maps using high-resolution (5cm) imagery over the priority target area, followed by detailed on-site mapping of selected areas. Chip samples were taken over selected pegmatites and analysed for lithium, tin, and tantalum. The sample profiles were orientated perpendicular to strike, with each sample being composited over the length of one meter. The pegmatites were chipped with the utilisation of a rock breaker, and the liberated material was then collected in a sample bag until 15-25 kg of material had been obtained. The samples were then processed and analysed for their trace element content by ICP-MS methods at an independent ALS laboratory.

This programme identified numerous pegmatites with notable indications of lithium, tin and tantalum mineralisation. The values in Table 1 represent the average grade over the length of the entire sample line. The weighted average of the sample lines in Table 1 combined (composite of the values) provides 200 m at 1.25% Li2O.

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)

Li2O (%)

Sn (%)

Ta (ppm)

T24

P51

11

0.93

0.17

149

T27

P45

22

0.78

0.18

53

T29

P45

2

2.89

0.06

24

T31

P43

13

1.05

0.14

65

T36

P63

20

0.97

0.12

172

T39

P68

5

1.20

0.16

60

T62

P246

9

1.56

0.09

48

T68

P154

6

1.37

0.10

163

T70

P155

10

1.20

0.14

54

T71

P158

14

1.33

0.17

118

T72

P163

24

1.65

0.15

52

T73

P163

15

1.21

0.13

53

T74

P163

3

0.86

0.07

136

T75

P186

3

1.14

0.18

85

T76

P188

4

2.44

0.07

43

T77

P193

14

1.24

0.12

38

T78

P193

13

1.93

0.10

36

T79

P197

6

0.81

0.08

111

T83

P229

6

0.85

0.18

119

 

The exploration programme extracted 704 samples, each representing a one-meter interval along the surface and obtained from the 79 sample lines completed during this programme. The detailed mapping and sampling programme was designed to evaluate the variability of the pegmatite occurrences within the area. The results show that tin, lithium, and tantalum mineralisation occur together in some areas, but separately in others.

The ore minerals for tin and tantalum within the project area appear to be cassiterite and columbite-group minerals respectively. A follow-up site visit was undertaken to those sample areas with enhanced lithium grades. Grab samples taken during this visit indicate that the main lithium bearing mineral is petalite, with lesser occurences of spodumene and lepidolite.

Future Work

Continued geological mapping and sampling is planned for the mineralisation trends within the license area, and an initial focus will be the mapped area north of the historical Tin Tan mine since this zone appears to be preferentially enriched in lithium. These mineralised pegmatites generally strike in a northeast-southwest direction with a near vertical dip. In addition, a scout exploration drilling programme is planned, with the aim to characterise the nature of these intrusions at depth.

In addition, the Company has initiated metallurgical test work on selected mineralised bulk samples from historical mining rock dumps to determine the beneficiation characteristics of the material. The initial test work is designed as pilot scale dense medium separation tests.

The results of the exploration programme and test work will inform the Company's development strategy for ML133.

Competent Person

The technical data in this announcement has been reviewed by Laurence Robb, a Non-Executive Director of AfriTin. Laurence Robb (BScHons, MSc, PhD, FGS, FGSSA, FRSSA) has more than 40 years of industry-related mineral project development experience. He is registered as a Professional Natural Scientist with The South African Council for Natural Scientific Professions, and Chartered Geologist with the Geological Society of London. He was Professor of Economic Geology and Director of the Economic Geology Research Institute in the University of the Witwatersrand's School of Geosciences. He is currently based at Oxford University as a Visiting Professor. He has reviewed the technical disclosures in this release and consents to the release of the information contained herein.

Glossary of abbreviations

ICP-MS

Inductively Coupled Plasma-Mass Spectrometry (Super Trace DL Na2O2)

km

Kilometre

Li

Symbol for Lithium

Li → Li2O

Metal to metal-oxide conversion factor of 2.153

Li2O

Lithium oxide

m

Metre

PPM

Parts Per Million

Sn

Symbol for Tin

Ta

Symbol for Tantalum

Glossary of Technical Terms

Dense Medium Separation

An ore beneficiation method in which minerals of relatively high or low specific gravity are separated from gangue using a hydrocyclone and a dense medium.

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

 

 

 

AfriTin Mining Limited

+27 (11) 268 6555

Anthony Viljoen, CEO

Nominated Adviser 

+44 (0) 207 220 1666

WH Ireland Limited

Katy Mitchell

Andrew de Andrade

Corporate Advisor and Joint Broker

H&P Advisory Limited

Andrew Chubb

Jay Ashfield

Nilesh Patel

+44 (0) 20 7907 8500

Stifel Nicolaus Europe Limited

Ashton Clanfield

Callum Stewart

Varun Talwar

+44 (0) 20 7710 7600

Tavistock Financial PR (United Kingdom)

+44 (0) 207 920 3150

Emily Moss

Catherine Drummond

Adam Baynes

 

 

About AfriTin Mining Limited

Notes to Editors

AfriTin Mining Limited is a London-listed technology metals mining company with a vision to create a portfolio of globally significant, conflict-free, producing and exploration assets. The Company's flagship asset is the Uis Tin Mine in Namibia, formerly the world's largest hard-rock open cast tin mine.

AfriTin is managed by an experienced board of directors and management team with a current strategy to ramp-up production at the Uis Mine in Namibia to more than 10,000 tonnes of tin concentrate and 350,000 tonnes of lithium concentrate in a Phase 2 expansion, having reached Phase 1 commercial production in 2020. The Company strives to capitalise on the solid supply/demand fundamentals of tin and lithium by developing a critical mass of resource inventory, achieving production in the near term and further scaling production by consolidating assets in Africa.

 

Appendix A: Results for all the sampling lines, the results represent the average grade of each element over the sampled length of the line.

Sample Line

Pegmatite

Length (m)

Li2O (%)

Sn (%)

Ta (ppm)

T01

P5

5

0.35

0.05

26

T02

P21

24

0.02

0.03

14

T03

P248

1

0.01

0.03

68

T04

P14

38

0.04

0.03

24

T05

P16

14

0.04

0.02

16

T06

P13

2

0.01

0.07

153

T07

Grab Sample

1

0.08

0.54

486

T08

P1

2

0.03

0.08

72

T09

P2

20

0.07

0.23

72

T10

P24

4

0.03

0.03

39

T11

P25

5

0.06

0.12

42

T12

P28

2

0.05

0.04

57

T13

P27

5

0.11

0.05

51

T14

P32

4

0.22

0.26

180

T15

P29

2

0.09

0.04

32

T16

P30

12

0.28

0.16

56

T17

P33

2

0.09

0.18

77

T18

P33

2

0.24

0.28

108

T19

P39

4

0.64

0.24

99

T20

P43

11

0.53

0.16

145

T21

P38

1

0.01

0.21

64

T22

P60

5

0.13

0.20

93

T23

P51

5

0.66

0.10

157

T24

P51

11

0.93

0.17

149

T25

P54

4

0.48

0.11

119

T26

P48

4

0.35

0.27

82

T27

P45

22

0.78

0.18

53

T28

P47

5

0.33

0.15

84

T29

P45

2

2.89

0.06

24

T30

P50

5

0.32

0.04

125

T31

P43

13

1.05

0.14

65

T32

P56

3

0.17

0.48

98

T33

P57

1

0.11

0.24

121

T34

P43

6

0.09

0.08

220

T35

P57

2

0.34

0.10

23

T36

P63

20

0.97

0.12

172

T37

P72

3

0.03

0.02

16

T38

P64

18

0.27

0.04

57

T39

P68

5

1.20

0.16

60

T40

P72

1

0.03

0.02

21

T41

P77

11

0.04

0.03

31

T42

P88

14

0.02

0.15

66

Trench

Pegmatite

Length (m)

Li2O (%)

Sn (%)

Ta (ppm)

T43

P86

1

0.05

0.02

13

T44

P86

1

0.05

0.01

15

T45

P88

9

0.06

0.05

32

T46

P104

3

0.01

0.15

60

T47

P111

12

0.08

0.05

23

T48

P100

9

0.03

0.04

20

T49

P93

7

0.01

0.35

72

T50

P98

5

0.03

0.09

111

T51

P102

13

0.05

0.06

22

T52

P114

23

0.06

0.01

27

T53

P88

20

0.02

0.01

9

T54

P88

32

0.04

0.01

19

T55

P88

22

0.02

0.02

24

T56

P88

4

0.02

0.01

30

T57

P88

3

0.02

0.01

14

T58

P88

30

0.02

0.02

20

T59

P119

1

0.01

0.01

9

T60

P113

15

0.04

0.02

13

T61

P126

3

0.40

0.11

81

T62

P246

9

1.56

0.09

48

T63

P138

2

0.05

0.29

93

T64

P136

2

0.65

0.10

45

T65

P148

5

0.05

0.20

76

T66

P151

10

0.05

0.02

13

T67

P152

8

0.06

0.01

15

T68

P154

6

1.37

0.10

163

T69

P173

3

0.02

0.01

12

T70

P155

10

1.20

0.14

54

T71

P158

14

1.33

0.17

118

T72

P163

24

1.65

0.15

52

T73

P163

15

1.21

0.13

53

T74

P163

3

0.86

0.07

136

T75

P186

3

1.14

0.18

85

T76

P188

4

2.44

0.07

43

T77

P193

14

1.24

0.12

38

T78

P193

13

1.93

0.10

36

T79

P197

6

0.81

0.08

111

T80

P198

5

0.63

0.18

80

T81

P219

6

0.01

0.01

12

T82

P223

4

0.13

0.37

145

T83

P229

6

0.85

0.18

119

T84

P223

1

0.67

0.35

106

 

 

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MSCFXLLLLFLFFBL
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