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home / news releases / LPT - ALPHAMIN ANNOUNCES SUCCESSFUL INFILL DRILLING AT MPAMA SOUTH WITH INCREASE IN BOTH RESOURCE CONFIDENCE AND MINERAL RESOURCES


LPT - ALPHAMIN ANNOUNCES SUCCESSFUL INFILL DRILLING AT MPAMA SOUTH WITH INCREASE IN BOTH RESOURCE CONFIDENCE AND MINERAL RESOURCES

Grand Baie, Mauritius , Feb. 10, 2023 (GLOBE NEWSWIRE) -- Alphamin Resources Corp. (AFM:TSXV, APH:JSE AltX, “Alphamin” or the “Company”), a producer of 4% of the world’s mined tin 1 from its high-grade operation in the Democratic Republic of Congo, is pleased to announce completion of the infill drilling campaign at Mpama South and an updated Mineral Resource Estimate (MRE) for Mpama South.

HIGHLIGHTS

  • Substantially improved the confidence of Mineral Resources at Mpama South whilst extending the known mineralisation boundary.
  • Increased In dicated Resource s by 286 % to 3.26 Mt based on assays from 63 additional infill and extensional drillholes.
  • Mpama South Mineral Resources now stand at:
    • 3.26Mt @ 2.46% Sn for 80.2kt contained tin in the Indicated category; and
  • 2.84Mt @ 2.42% Sn for 68.7kt contained tin in the Inferred category.
  • S ignificant additional resource growth potential at Mpama South as the deposit still remains open down-dip.
  • Mpama South Mine construction works progressing according to plan – project completion expected to increase Alphamin’s annual contained tin production from the current 12,000tpa to ~ 20,000 tpa , approximating 6 .6 % of the world’s mine d tin 1 .

Mpama South Updated Mineral Resource Estimate

In just 24 months, Alphamin has:

  • delivered a top-10 globally significant CRIRSCO compliant tin deposit by contained tin 1 at Mpama South;
  • grown the resources to ~2.2 times versus the Maiden Mineral Resources and PEA 2 numbers;
  • increased resource confidence across the deposit; and
  • commenced mine construction through own cashflows.

This brings forward an additional planned ~7,200tpa contained tin production, which will make Alphamin one of the largest tin producers globally and delivers on the Company strategy of organic growth and creating shareholder value.

The updated Mineral Resource for Mpama South follows eight months after the previous update announced on 31 May 2022. The update is based on receipt of assays for another 63 infill and extensional drillholes completed subsequent to the previous estimate which was based on 124 drillholes. The updated Mineral Resource is presented in Figure 1 along with the direction in which mineralisation is still open down dip and significant high grade periphery drilling intercepts.

The updated MRE now includes results from 187 drillholes at Mpama South as well as 6 drillholes drilled in 2015 in the area between Mpama South and the Mpama North ore body. The MRE was estimated using the Canadian Institute of Mining, Metallurgy and Petroleum (CIM) Best Practice Guidelines (2019) and is reported in accordance with the 2014 CIM Definition Standards.

Figure 1 : Updated Mpama South Mineral Resource 07 February 2023 with selected intercepts and direction in which mineralisation is still open
Source: Alphamin 2022

The Mineral Resource is classified into the Indicated and Inferred categories and is reported at a base case tin cut-off grade of 1.0%, which satisfies reasonable prospects for economic extraction. Mpama South Indicated Resources increased by ~286% to 3.26Mt by converting Inferred Resources, while Inferred Resources grew nominally by ~275kt (excluding those tonnes converted to Indicated). The Mineral Resource Estimate, which is effective as of 07 February 2023, is presented in Table 1 below:

Table 1: Updated Mpama South Mineral Resources effective date 07 February 202 3

Classification
Tonnes (millions)
Sn %
Sn Tonnes
(thousands)
Indicated 3
3.26
2.46
80.2
Inferred 4
2.84
2.42
68.7

Mineral Resources that are not Mineral Reserves do not have a demonstrated economic viability and require advanced studies and economic analysis to prove their viability for extraction.

Extensional drilling down-dip and in the shallower northern and southern portions of Mpama South can be conducted at the Company’s election to carry on extending known mineralisation at Mpama South, which is still open in multiple directions. High grade drillholes around the peripheries where mineralisation remains open are highlighted in Figure 1, showing the remaining prospectivity for Resource expansion. However, for 2023, the focus will primarily be aimed at the Mpama South Mine construction and commissioning efforts, while exploration drilling will be curtailed, instead, focusing on further field work campaigns to support future programs.

The MRE has been completed by Mr. J.C. Witley (BSc Hons, MSc (Eng.)) who is a geologist with 34 years’ experience in base and precious metals exploration and mining as well as Mineral Resource evaluation and reporting. He is a Principal Resource Consultant for The MSA Group (an independent consulting company), is registered with the South African Council for Natural Scientific Professions (SACNASP) and is a Fellow of the Geological Society of South Africa (GSSA). Mr. Witley has the appropriate relevant qualifications and experience to be considered a “Qualified Person” for the style and type of mineralisation and activity being undertaken as defined in National Instrument 43-101 Standards of Disclosure of Mineral Projects .

Bisie Ridge Regional Exploration Update

Alphamin intensified exploration drilling on the 13km long Bisie Ridge from Q3 2022 to test highly anomalous soil, geophysical and structural targets identified during 2021. 8,773 metres of the 10,000 metre Phase 1 diamond core programme have been completed along the Ridge, with the remainder due for completion in Q1 2023.

Although anomalous mineralisation has been confirmed in drilling on the Ridge, it is not of the obvious coarse visual cassiterite type frequently seen in drillcore from Mpama North and South.

Only ~25% of assays have been returned from the independent laboratory to date from the Ridge drilling. Assay results when received will support a fuller investigation into the regional setting, along with data from the on-going geophysical downhole surveys, structural investigations and mapping, thereby enabling a refocused exploration programme. Until then, the key focus at site remains the construction and commissioning of the new Mpama South Mine.

Qualified Person s

Mr Jeremy Witley, Pr. Sci. Nat., B.Sc. (Hons.) Mining Geology, M.Sc. (Eng.), is a qualified person (QP) as defined in National Instrument 43-101 and has reviewed and approved the scientific and technical information contained in this news release. He is a Principal Mineral Resource Consultant of The MSA Group (Pty.) Ltd., an independent technical consultant to the Company.

____________________________________________________________________________

FOR MORE INFORMATION, PLEASE CONTACT:

Maritz Smith
CEO
Alphamin Resources Corp.
Tel: +230 269 4166
E-mail: msmith@alphaminresources.com
____________________________________________________________________________

CAUTION REGARDING FORWARD LOOKING STATEMENTS

Information in this news release that is not a statement of historical fact constitutes forward-looking information. Forward-looking statements contained herein include, without limitation, statements relating to the anticipated future exploration and resource estimation activities and outcomes and the timing thereof and expected increases in tin production from the development of the Mpama South deposit and the cost and timing of such development activities . Forward-looking statements are based on assumptions management believes to be reasonable at the time such statements are made. There can be no assurance that such statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements. Although Alphamin has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements, there may be other factors that cause results not to be as anticipated, estimated or intended. Factors that may cause actual results to differ materially from expected results described in forward-looking statements include, but are not limited to: uncertainty of future exploration and assay results and consistency with past results and expectations; uncertainties related to the technical and economic parameters applied in the Mpama South Preliminary Economic Assessment regarding forecasted tin prices, the tin grade mined and processing reco v eries as well as operating costs; uncertainties inherent in estimates of Mineral Resources, global geopolitical and economic uncertainties, volatility of metal prices, uncertainties with respect to social, community and environmental impacts, uninterrupted access to required infrastructure, adverse political events, impacts of the global Covid-19 pandemic as well as those risk factors set out in the Company’s Management Discussion and Analysis and other disclosure documents available under the Company’s profile at www.sedar.com. Forward-looking statements contained herein are made as of the date of this news release and Alphamin disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or results or otherwise, except as required by applicable securities laws.

Neither the TSX Venture Exchange nor its regulation services provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release.

Appendix 1: SAMPLE PREPARATION, ANALYSES AND QUALITY CONTROL AND QUALITY ASSURANCE (QAQC)

For sample preparation, analyses and quality control and quality assurance, see the Company’s news release dated 07 March 2022 entitled “ALPHAMIN ANNOUNCES MAIDEN MINERAL RESOURCE ESTIMATE AND POSITIVE PRELIMINARY ECONOMIC ASSESSMENT FOR MPAMA SOUTH”

Appendix 2: SIGNIFICANT INTERCEPTS (0.5% Sn lower threshold)

Hole

Easting
Northing
RLm

Azi (°)

Dip (°)

From

To

Sn %

Width
Sample Position
GPS
GPS
(m) 1
mid_x
mid_y
mid_z
BGH017
582535
9884822
732
55
-10
237.8
238.8
4.99
1.00
582,732
9,884,966
678.6
BGH018

582535

9884822

732

93

0

141.2
144.4
2.07
3.15
582,691
9,884,820
727.9
145.8
151.0
0.76
5.25
582,696
9,884,820
727.9
BGH019
582535
9884822
732
85
-5
147.0
152.0
2.05
5.00
582,696
9,884,837
715.8
BGH020

582535

9884822

732

84

-15

160.6
164.4
1.45
3.80
582,704
9,884,846
689.3
169.3
171.1
5.42
1.80
582,711
9,884,846
687.7
BGH021

582535

9884822

732

93

-15

109.2
110.3
3.20
1.10
582,654
9,884,821
700.1
164.6
167.3
3.29
2.72
582,708
9,884,818
687.6
BGH022



582554



9884785



732



90



0



75.0
80.5
3.99
5.53
582,633
9,884,784
729.3
109.0
110.0
1.35
1.00
582,664
9,884,785
729.9
119.2
122.1
2.22
2.88
582,676
9,884,785
730.1
BGH023

582535

9884822

732

75

-15

171.4
174.3
1.72
2.89
582,710
9,884,859
683.7
175.9
178.0
1.09
2.15
582,714
9,884,860
683.0
BGH024

582554

9884785

732

103

-5

127.7
129.6
0.54
1.90
582,679
9,884,749
717.2
138.0
142.0
1.13
4.05
582,690
9,884,746
716.2
BGH025





582535





9884822





732





55





-20





212.3
213.4
0.60
1.15
582,724
9,884,919
662.3
218.0
221.5
2.29
3.45
582,731
9,884,921
660.7
222.7
223.7
13.05
1.00
582,734
9,884,923
659.9
228.0
234.8
2.73
6.80
582,741
9,884,926
658.0
BGH026



582554



9884785



732



113



-10



103.7
108.0
3.30
4.29
582,649
9,884,735
713.7
134.8
136.5
3.72
1.65
582,676
9,884,722
708.6
161.0
162.5
5.61
1.50
582,699
9,884,711
704.5
BGH030





582554





9884785





732





115





-20





110.0
111.4
7.24
1.40
582,655
9,884,753
692.2
141.9
152.5
4.85
10.60
582,686
9,884,745
680.0
158.0
161.2
3.61
3.20
582,699
9,884,742
675.3
174.5
175.8
11.03
1.35
582,713
9,884,738
670.5
BGH032







582554







9884785







732







125







-20







177.0
178.7
1.70
1.72
582,692
9,884,684
671.3
182.0
188.3
3.00
6.25
582,697
9,884,679
669.1
190.3
193.0
0.95
2.75
582,702
9,884,676
667.2
194.4
202.0
1.37
7.60
582,707
9,884,672
665.3
203.5
208.0
2.67
4.50
582,713
9,884,668
663.2
BGH034









582554









9884785









732









115









-25









174.8
178.0
11.99
3.20
582,689
9,884,696
653.3
195.7
200.0
1.21
4.30
582,706
9,884,686
644.8
202.4
206.7
1.86
4.28
582,711
9,884,683
642.3
208.0
213.3
1.40
5.30
582,716
9,884,680
640.1
216.3
221.3
1.42
5.05
582,722
9,884,676
637.3
225.7
231.0
0.70
5.35
582,730
9,884,671
634.0
BGH027



582544



9884822



732



68



-27



212.4
214.0
0.58
1.65
582,729
9,884,879
634.0
226.0
229.3
1.32
3.30
582,741
9,884,883
628.4
235.5
236.6
1.54
1.13
582,749
9,884,885
625.2
BGH028





582554





9884785





732





90





-10





125.0
126.0
1.72
1.00
582,676
9,884,772
700.9
136.1
137.2
1.85
1.08
582,687
9,884,770
698.4
140.3
142.0
1.03
1.72
582,691
9,884,770
697.4
147.5
151.3
2.88
3.79
582,699
9,884,769
695.5
BGH029



582544



9884822



732



93



-25



126.0
128.4
4.66
2.35
582,663
9,884,826
678.5
178.9
184.1
1.25
5.15
582,713
9,884,827
657.7
193.7
196.1
3.95
2.35
582,726
9,884,827
653.0
BGH031

582544

9884822

732

75

-25

208.0
211.5
0.99
3.53
582,729
9,884,876
639.9
219.4
222.4
1.16
2.98
582,739
9,884,879
636.0
BGH033

582544

9884822

732

60

-27

259.0
265.5
7.32
6.46
582,756
9,884,929
612.8
268.5
270.5
1.02
1.99
582,762
9,884,931
610.0
BGH035



582554



9884785



732



90



-25



152.0
165.0
2.96
13.00
582,686
9,884,816
665.0
171.0
173.6
1.47
2.60
582,703
9,884,815
657.4
176.6
180.1
2.40
3.48
582,709
9,884,814
654.9
BGH036

582544

9884822

732

65

0

147.5
151.4
2.31
3.90
582,687
9,884,878
724.8
156.6
160.7
0.93
4.02
582,696
9,884,881
724.7
BGH037







582554







9884785







732







105







-30







154.0
157.0
3.81
3.00
582,680
9,884,741
647.5
194.6
197.6
1.54
2.95
582,712
9,884,730
626.0
208.0
211.2
1.29
3.23
582,723
9,884,726
619.3
216.3
220.2
2.79
3.90
582,730
9,884,723
615.1
222.4
226.7
1.77
4.30
582,735
9,884,721
612.1
BGH038



582544



9884822



732



75



-30



151.7
154.6
5.22
2.90
582,677
9,884,851
654.3
218.3
223.7
3.38
5.35
582,735
9,884,861
621.4
226.7
231.5
1.95
4.80
582,743
9,884,862
617.6
BGH039





582554





9884785





732





100





-22





112.1
113.0
2.12
0.92
582,665
9,884,755
687.6
116.3
121.0
3.33
4.65
582,661
9,884,753
686.1
145.0
166.0
2.20
21.00
582,696
9,884,744
674.2
174.5
176.0
0.95
1.50
582,713
9,884,739
668.9
BGH040

582544

9884822

732

60

-30

232.0
233.0
0.95
1.00
582,725
9,884,922
618.2
273.7
277.1
3.79
3.35
582,761
9,884,937
600.0
BGH041
582500
9884847
732
55
-25
340.0
344.5
3.03
4.50
582,807
9,885,002
599.5
BGH042



582544



9884822



732



60



-35



277.4
280.0
1.93
2.65
582,751
9,884,922
569.4
308.5
312.0
0.62
3.50
582,776
9,884,932
552.6
313.0
315.6
1.52
2.55
582,779
9,884,933
550.5
BGH043



582544



9884822



732



100



-10



102.5
104.2
2.69
1.65
582,644
9,884,808
709.0
123.0
124.0
1.06
1.00
582,663
9,884,805
704.8
163.6
167.0
2.82
3.36
582,704
9,884,798
696.7
BGH044
582500
9884847
710
70
-35
330.0
334.1
1.31
4.13
582,764
9,884,941
533.4
BGH045



582544



9884822



732



100



-20



120.7
121.8
31.55
1.10
582,656
9,884,806
687.4
156.0
159.4
0.56
3.40
582,689
9,884,799
674.7
176.7
183.6
3.24
6.92
582,708
9,884,795
668.1
BGH046





582544





9884822





732





100





-30





195.2
206.0
2.85
10.82
582,712
9,884,795
630.5
212.5
215.2
1.90
2.65
582,723
9,884,793
623.7
218.0
220.6
7.16
2.60
582,728
9,884,792
620.8
225.0
226.0
4.36
1.00
582,733
9,884,791
617.7
BGH047

582565

9884535

718

60

0

121.6
124.6
0.91
2.99
582,653
9,884,879
739.2
147.1
148.1
1.28
1.00
582,675
9,884,889
741.1
BGH048

582567

9884509

727

90

0

140.8
143.1
0.90
2.30
582,708
9,884,496
727.7
146.5
148.0
0.74
1.47
582,713
9,884,495
728.0
BGH049
582565
9884535
718
65
-15
145.4
147.4
4.27
2.00
582,689
9,884,599
674.5
BGH050
582567
9884509
727
105
-5
160.0
161.4
1.06
1.38
582,722
9,884,469
711.7
BGH051





582565





9884535





718





40





0





134.8
137.0
2.23
2.20
582,662
9,884,630
712.3
151.0
156.3
1.20
5.30
582,675
9,884,642
711.4
164.2
169.5
3.95
5.27
582,685
9,884,651
710.8
171.3
172.6
4.08
1.30
582,688
9,884,655
710.6
BGH052
582567
9884509
727
120
0
205.9
207.1
1.86
1.20
582,732
9,884,385
722.9
BGH053









582565









9884535









718









40









-15









173.7
176.9
9.58
3.20
582,685
9,884,653
669.2
178.6
181.4
4.07
2.88
582,688
9,884,656
667.9
192.4
196.9
3.28
4.45
582,698
9,884,666
664.0
198.9
206.8
2.45
7.91
582,704
9,884,671
661.8
207.5
209.5
5.04
1.97
582,708
9,884,675
660.3
214.7
216.0
2.32
1.35
582,713
9,884,680
658.6
BGH054
No significant intercepts
BGH055
582565
9884535
718
80
-15
145.0
146.0
0.62
1.00
582,705
9,884,549
682.7
BGH056
No significant intercepts
BGH057
No significant intercepts
BGH058
582565
9884510
727
95
-5
153.4
155.6
1.98
2.25
582,717
9,884,501
703.9
BGH059
582567
9884536
718
95
0
165.0
166.0
3.63
1.00
582,732
9,884,528
714.4
BGH060
No significant intercepts
BGH061
582567
9884536
727
130
-10
157.6
159.2
1.22
1.62
582,719
9,884,525
677.7
BGH062
582567
9884537
718
95
-15
154.0
156.0
2.18
2.00
582,695
9,884,589
650.2
BGH063









582782









9884646









829









270









-70









186.3
194.4
0.82
8.12
582,719
9,884,661
650.5
197.4
202.5
1.12
5.03
582,715
9,884,661
641.8
205.0
209.1
0.83
4.05
582,712
9,884,661
635.4
211.1
218.9
2.06
7.77
582,709
9,884,661
628.3
220.4
222.6
0.86
2.15
582,706
9,884,661
622.5
231.0
233.0
0.87
2.00
582,701
9,884,661
613.0
BGH064
582888
9884976
839
270
-50
220.8
222.6
0.63
1.80
582,746
9,884,976
668.9
BGH065

582913

9885057

819

270

-60

271.0
276.0
2.93
4.95
582,769
9,885,057
586.1
291.6
292.6
1.70
1.00
582,759
9,885,057
570.9
BGH066

582888

9884976

839

270

-60

276.0
278.6
8.49
2.59
582,754
9,884,965
596.1
300.0
301.0
1.78
1.00
582,742
9,884,965
576.6
BGH067



582913



9885057



819



270



-67



295.8
300.5
3.21
4.72
582,789
9,885,065
548.1
303.0
304.6
1.56
1.62
582,786
9,885,065
543.1
337.0
338.0
0.55
1.00
582,769
9,885,068
514.3
BGH068

582913

9885057

819

270

-50

247.0
248.2
2.10
1.20
582,749
9,885,051
633.1
251.8
255.1
1.75
3.30
582,745
9,885,051
628.8
BGH069
582888
9884976
839
270
-70
321.8
324.7
3.84
2.93
582,779
9,884,962
534.7
BGH070
582913
9885057
819
270
-73
331.0
336.4
3.00
5.35
582,802
9,885,040
505.2
BGH071
No significant intercepts
BGH072

582852

9884845

831

270

-67

274.6
279.7
2.70
5.10
582,749
9,884,847
574.0
290.4
294.8
3.61
4.40
582,742
9,884,847
560.0
BGH073
582731
9884691
838
280
-60
121.0
123.0
0.72
2.00
582,671
9,884,702
731.9
BGH074





582944





9885130





798





270





-67





278.9
283.9
2.85
5.03
582,810
9,885,137
551.2
285.5
289.1
1.60
3.61
582,807
9,885,138
546.3
294.5
297.3
7.14
2.79
582,802
9,885,139
539.1
299.7
303.3
0.53
3.69
582,799
9,885,139
534.5
BGH075





582731





9884691





838





270





-70





115.4
116.7
6.76
1.25
582,690
9,884,690
729.4
119.5
120.8
15.22
1.30
582,688
9,884,690
725.7
125.1
129.8
3.56
4.71
582,684
9,884,690
719.3
162.6
164.6
8.94
2.08
582,667
9,884,689
687.8
BGH076





582752





9884801





849





300





-40





108.0
109.0
0.84
1.00
582,682
9,884,844
779.6
118.8
119.5
3.71
0.65
582,675
9,884,848
772.7
128.2
131.0
2.82
2.85
582,668
9,884,852
765.8
136.7
137.0
0.97
0.30
582,663
9,884,855
761.0
BGH077







582944







9885130







798







270







-72







316.8
321.2
2.57
4.36
582,830
9,885,130
501.7
323.0
328.4
2.56
5.36
582,827
9,885,130
495.8
329.1
330.1
0.52
1.07
582,825
9,885,130
492.4
335.3
337.4
9.63
2.11
582,822
9,885,130
486.5
339.8
340.1
7.07
0.30
582,820
9,885,131
483.4
BGH078



582752



9884801



849



280



-40



102.0
106.0
1.88
4.00
582,674
9,884,816
782.6
108.0
109.0
0.62
1.00
582,671
9,884,817
779.7
115.0
117.2
0.80
2.15
582,665
9,884,818
774.8
BGH079













582852













9884845













831













270













-73













290.2
294.4
1.00
4.25
582,765
9,884,842
552.6
296.3
302.3
9.46
6.00
582,763
9,884,841
546.1
304.8
305.7
18.75
0.89
582,761
9,884,841
540.5
312.0
313.0
1.08
1.00
582,758
9,884,841
533.8
316.9
321.6
4.65
4.73
582,755
9,884,840
527.5
322.6
328.0
5.41
5.43
582,753
9,884,840
522.0
329.0
329.5
1.59
0.53
582,751
9,884,840
518.4
340.7
341.4
4.29
0.74
582,747
9,884,839
507.6
BGH080



582944



9885130



798



270



-75



339.9
343.6
1.05
3.70
582,853
9,885,141
469.2
345.0
346.6
4.11
1.55
582,851
9,885,141
465.5
360.7
361.0
11.95
0.30
582,846
9,885,143
451.5
BGH081a

583022

9885299

776

270

-50

269.0
274.6
1.99
5.56
582,838
9,885,306
578.6
275.6
275.9
0.64
0.30
582,835
9,885,307
576.0
BGH082a



583013



9885209



752



270



-50



263.8
266.3
3.43
2.47
582,836
9,885,222
556.0
268.4
269.2
3.32
0.80
582,833
9,885,223
553.5
277.0
277.3
15.65
0.30
582,827
9,885,224
547.9
BGH083
No significant intercepts
BGH084

583023

9885299

776

270

-57

279.0
280.9
6.25
1.95
582,857
9,885,307
552.8
283.1
286.3
1.28
3.25
582,854
9,885,307
549.2
BGH085
583023
9885299
776
270
-65
294.7
298.4
0.83
3.70
582,890
9,885,304
512.9
BGH086

583013

9885208

752

270

-57

275.4
280.8
3.07
5.43
582,847
9,885,214
530.1
286.1
286.5
18.90
0.46
582,841
9,885,215
524.4
BGH087
583023
9885299
777
270
-75
263.8
264.3
0.59
0.53
582,946
9,885,305
525.0
BGH088



















583012



















9885208



















752



















270



















-67



















297.7
299.5
11.93
1.72
582,876
9,885,221
487.3
301.0
301.8
6.79
0.77
582,875
9,885,221
485.0
303.7
304.0
2.47
0.30
582,873
9,885,222
483.0
305.7
306.0
1.66
0.30
582,872
9,885,222
481.4
307.2
307.6
6.66
0.35
582,871
9,885,223
480.2
308.3
308.9
12.15
0.67
582,871
9,885,223
479.2
309.5
309.8
1.98
0.31
582,870
9,885,223
478.3
310.4
310.7
17.65
0.33
582,869
9,885,223
477.6
313.0
313.9
2.82
0.85
582,868
9,885,224
475.3
324.5
324.9
5.77
0.38
582,861
9,885,226
466.3
325.4
325.8
10.40
0.40
582,861
9,885,226
465.6
BGH089





582951





9885352





779





270





-50





198.0
199.0
4.58
1.00
582,822
9,885,357
628.9
202.7
203.5
12.25
0.80
582,819
9,885,357
625.5
205.1
205.5
7.96
0.44
582,818
9,885,357
623.7
217.5
218.5
31.90
1.00
582,809
9,885,358
614.1
BGH090



582951



9885423



769



270



-50



168.8
170.5
2.45
1.68
582,843
9,885,424
638.3
170.9
171.5
12.55
0.60
582,842
9,885,424
637.1
173.0
173.3
5.05
0.33
582,841
9,885,424
635.6
BGH091
582951
9885352
779
270
-65
222.1
223.5
4.02
1.40
582,850
9,885,358
581.3
BGH092
583021
9885430
752
270
-55
193.5
193.9
17.15
0.38
582,913
9,885,431
591.9
BGH093



583013



9885345



759



270



-70



224.3
224.8
4.06
0.50
582,932
9,885,341
549.9
225.8
226.7
1.81
0.92
582,931
9,885,341
548.3
227.7
228.3
2.75
0.60
582,930
9,885,341
546.7
BGH094



582990



9885055



810



270



-65



381.0
384.8
3.84
3.81
582,808
9,885,054
473.5
389.7
390.3
5.95
0.51
582,805
9,885,054
467.4
408.5
411.0
5.82
2.55
582,795
9,885,054
450.4
BGH095





582960





9884759





831





270





-60





391.6
399.6
4.56
8.03
582,773
9,884,762
482.7
400.0
401.0
1.85
1.00
582,770
9,884,761
478.6
405.0
412.0
4.47
6.97
582,766
9,884,761
471.9
414.0
414.3
1.36
0.30
582,763
9,884,761
467.2
BGH096
No significant intercepts
BGH097

583013

9885345

759

270

-58

242.0
245.5
1.10
3.50
582,879
9,885,344
555.7
247.0
250.1
2.66
3.10
582,876
9,885,344
551.8
BGH099
No significant intercepts
BGH100

583013

9885345

759

270

-79

226.8
231.3
2.09
4.51
582,965
9,885,347
535.2
233.1
235.0
1.58
1.92
582,964
9,885,347
530.3
BGH101







582990







9884975







813







270







-65







387.4
388.6
2.66
1.25
582,802
9,884,968
474.7
392.3
394.7
1.49
2.35
582,799
9,884,968
470.1
396.0
398.2
0.53
2.24
582,797
9,884,968
467.1
402.7
410.2
3.68
7.46
582,792
9,884,967
459.3
423.6
425.5
13.48
1.84
582,781
9,884,967
444.5
BGH102
No significant intercepts
BGH103



582951



9885423



767



270



-64



161.9
167.0
1.71
5.17
582,882
9,885,425
618.5
167.8
172.1
1.11
4.29
582,880
9,885,425
613.4
173.4
177.0
1.71
3.65
582,877
9,885,425
608.7
BGH104







582985







9885054







811







270







-72







459.4
463.0
10.19
3.65
582,829
9,885,047
378.1
464.8
465.1
8.35
0.30
582,827
9,885,047
374.8
471.4
475.5
1.72
4.15
582,823
9,885,046
367.3
477.6
478.0
0.96
0.42
582,821
9,885,046
363.5
485.9
486.2
2.12
0.37
582,817
9,885,045
356.3
BGH105



















582963



















9884842



















834



















270



















-70



















406.5
407.0
0.98
0.48
582,807
9,884,837
458.9
410.2
413.0
1.20
2.80
582,805
9,884,836
454.6
416.9
421.4
1.66
4.45
582,802
9,884,836
447.9
421.8
425.0
4.33
3.21
582,800
9,884,836
444.1
427.7
431.3
0.80
3.55
582,797
9,884,836
438.7
434.6
437.4
1.11
2.77
582,794
9,884,835
433.0
442.3
442.6
1.98
0.30
582,791
9,884,835
427.3
446.0
446.3
1.24
0.30
582,789
9,884,834
424.1
453.7
454.0
0.62
0.30
582,785
9,884,834
417.4
457.8
459.9
5.03
2.17
582,783
9,884,833
413.0
461.7
462.6
0.91
0.93
582,781
9,884,833
410.2
BGH106
No significant intercepts
BGH107
582991
9884982
814
270
-75
496.9
502.2
8.21
5.21
582,826
9,884,984
343.4
BGH108









582963









9884905









828









270









-62









377.2
377.5
11.95
0.31
582,786
9,884,895
495.2
381.5
381.8
7.40
0.30
582,784
9,884,895
491.5
385.3
387.5
4.50
2.20
582,781
9,884,895
487.6
391.0
395.0
2.09
3.96
582,777
9,884,894
482.1
401.0
402.0
1.44
1.00
582,773
9,884,894
475.1
405.3
409.4
2.40
4.05
582,769
9,884,893
470.3
BGH109
No significant intercepts
BGH110





582963





9884905





828





270





-73





459.2
467.4
1.00
8.14
582,799
9,884,879
397.0
468.1
476.7
10.35
8.58
582,795
9,884,878
389.2
485.5
486.2
10.30
0.70
582,788
9,884,876
377.8
489.8
490.9
2.01
1.12
582,786
9,884,875
374.0
BGH111









582959









9884759









831









270









-55









334.4
341.3
4.24
6.89
582,768
9,884,745
553.1
342.4
350.0
4.92
7.65
582,762
9,884,745
547.0
352.5
357.3
0.67
4.75
582,756
9,884,744
540.6
358.3
361.3
0.63
3.03
582,753
9,884,744
537.0
362.7
367.2
0.58
4.50
582,749
9,884,744
533.3
368.0
370.2
3.15
2.16
582,746
9,884,743
530.4
BGH112

582870

9885354

790

270

-55

130.3
130.6
2.32
0.30
582,797
9,885,360
681.8
135.3
135.7
5.69
0.44
582,794
9,885,360
677.7
BGH113

582910

9885205

780

270

-62

213.0
216.6
0.94
3.60
582,810
9,885,204
590.1
229.0
230.0
4.49
1.00
582,803
9,885,204
577.3
BGH114





582870





9885354





790





270





-63





138.5
138.9
4.40
0.36
582,807
9,885,358
666.2
143.3
143.6
6.84
0.30
582,805
9,885,358
662.1
147.0
147.6
3.83
0.65
582,803
9,885,358
658.8
151.5
151.8
0.82
0.30
582,801
9,885,358
655.0
BGH115
No significant intercepts
BGH116

582886

9884671

818

270

-58

285.4
292.0
3.51
6.63
582,727
9,884,661
577.7
292.5
294.0
1.04
1.54
582,724
9,884,660
574.2
BGH117
No significant intercepts
BGH118

582842

9885430

769

270

-60

95.0
95.9
2.05
0.90
582,795
9,885,430
686.6
100.6
100.9
0.95
0.30
582,792
9,885,430
682.1
BGH119
582842
9885430
769
270
-75
103.0
105.0
2.33
2.00
582,814
9,885,431
669.5
BGH120

582886

9884671

818

270

-70

323.0
327.4
0.98
4.41
582,746
9,884,662
528.2
330.3
334.4
1.92
4.14
582,741
9,884,662
522.6
BGH121
No significant intercepts
BGH122



582853



9885112



780



275



-65



153.4
157.5
1.50
4.09
582,786
9,885,123
640.6
158.1
161.9
1.26
3.81
582,784
9,885,123
636.5
162.8
165.0
1.66
2.25
582,783
9,885,123
633.1
BGH123

582960

9884759

831

270

-70

432.0
437.1
1.96
5.05
582,789
9,884,746
432.8
438.5
438.8
1.20
0.30
582,787
9,884,746
429.3
BGH124
No significant intercepts





















BGH125
No significant intercepts
BGH126b

582842

9885204

800

270

-65

150.8
151.6
1.26
0.76
582,785
9,885,211
659.7
164.0
164.3
1.23
0.3
582,780
9,885,212
647.8
BGH127

582854

9885112

781

275

-50

145.0
145.3
1.44
0.3
582,760
9,885,121
669.8
155.3
158.0
0.62
2.75
582,753
9,885,121
661.1
BGH128



583076



9885130



758



270



-68



400.8
407.3
4.47
6.51
582,904
9,885,137
393.4
408.8
410.4
0.72
1.55
582,901
9,885,138
388.9
412.6
416.0
1.11
3.4
582,899
9,885,138
385.1
BGH129

582912

9885391

786

270

-60

175.6
178.5
1.64
2.93
582,826
9,885,391
631.3
181.1
181.4
0.95
0.3
582,824
9,885,391
627.6
BGH130



582824



9885062



788



265



-50



126.3
127.0
1.33
0.68
582,740
9,885,062
693.0
133.0
134.0
0.91
1
582,736
9,885,062
687.9
139.2
139.6
5.43
0.4
582,732
9,885,062
683.5
BGH131

582931

9885285

801

270

-53

196.9
200.6
0.71
3.7
582,805
9,885,289
647.4
210.0
210.3
0.9
0.3
582,797
9,885,289
638.9
BGH132

582912

9885391

786

270

-50

169.0
172.7
1.46
3.74
582,806
9,885,388
652.1
175.8
176.2
1.6
0.4
582,802
9,885,388
648.1
BGH133

582851

9885511

764

270

-60

49.6
50.3
2.54
0.68
582,825
9,885,513
720.8
53.6
53.8
2.38
0.22
582,823
9,885,514
717.5
BGH134
No significant intercepts
BGH135



582836



9885387



775



270



-50



82.0
82.9
0.63
0.89
582,785
9,885,387
710
92.7
93.0
1.44
0.3
582,778
9,885,387
702
104.0
105.0
0.67
1
582,771
9,885,387
693
BGH136



582852



9885467



759



270



-58



65.1
66.0
1.32
0.86
582,817
9,885,467
704
69.8
72.3
0.69
2.55
582,815
9,885,467
699
75.7
79.1
1
3.41
582,811
9,885,467
694
BGH137
582931
9885285
801
270
-62
224.4
230.6
1.41
6.2
582,830
9,885,285
598
BGH138
582836
9885387
775
270
-65
97.4
97.7
2.3
0.3
582,795
9,885,387
687
BGH139
582951
9885468
748
270
-59
123.9
127.6
0.98
3.77
582,886
9,885,472
641
BGH140
582987
9885256
783
270
-50
249.5
253.6
1.26
4.05
582,831
9,885,266
586
BGH141
582912
9885164
783
270
-50
174.6
179.3
1.29
4.72
582,802
9,885,170
645
BGH142

582912

9885016

826

270

-50

230.4
235.8
1.29
5.39
582,766
9,885,018
645
236.7
238.3
1.98
1.58
582,763
9,885,018
641
BGH143

582912

9885164

783

270

-60

210.8
215.8
0.86
5.04
582,803
9,885,172
600
225.3
225.7
2.06
0.35
582,796
9,885,173
590
BGH144a

582987

9885255

783

270

-60

264.6
266.8
2.17
1.85
582,857
9,885,263
552
269.1
269.4
0.3
3.1
582,855
9,885,264
549
BGH145



582912



9885016



826



270



-60



265.5
271.0
2.59
5.48
582,786
9,885,013
589
271.4
272.8
1.17
1.37
582,784
9,885,013
586
282.2
282.5
16.25
0.3
582,779
9,885,013
577
BGH146
No significant intercepts
BGH147
No significant intercepts
BGH148
No significant intercepts
BGH149







582954







9884799







834







270







-55







335.4
337.2
2.1
1.75
582,761
9,884,799
559
342.0
346.0
4.45
4
582,757
9,884,799
553
347.7
350.7
2.43
3.07
582,754
9,884,799
548
352.3
352.8
5.12
0.51
582,752
9,884,799
546
362.5
363.0
0.57
0.5
582,746
9,884,799
537
BGH150
No significant intercepts
BGH151
No significant intercepts
BGH152D1

582821

9884623

805

269

-72

257.0
259.9
2.01
2.85
582,731
9,884,621
564
263.0
263.3
9.06
0.3
582,729
9,884,621
559
BGH153







582953







9884875







834







270







-55







327.5
330.6
1.6
3.14
582,766
9,884,880
563
333.4
336.5
2.62
3.06
582,763
9,884,880
559
342.4
345.7
1.63
3.29
582,757
9,884,881
551
347.0
349.7
0.57
2.68
582,755
9,884,881
548
367.8
368.7
4.4
0.91
582,743
9,884,881
532
BGH154
No significant intercepts
BGH155
No significant intercepts
BGH156

582988

9885258

789

270

-68

289.2
289.8
2.57
0.65
582,875
9,885,264
523
296.6
296.9
0.77
0.3
582,872
9,885,265
516
BGH157
No significant intercepts
BGH158



582802



9885086



788



270



-47



105.4
107.2
0.68
1.75
582,740
9,885,087
701
113.0
117.0
0.85
4
582,735
9,885,087
694
120.0
120.8
0.61
0.75
582,732
9,885,087
690
BGH159



582975



9884940



822



270



-72



436.4
437.7
3.66
1.33
582,819
9,884,932
415
448.0
449.0
0.62
1
582,814
9,884,932
405
457.2
457.6
1.28
0.4
582,810
9,884,933
397
BGH160





582903





9885087





806





270





-50





219.1
219.5
1.12
0.38
582,755
9,885,090
645
221.6
222.0
1.29
0.49
582,753
9,885,090
643
226.7
230.0
0.74
3.3
582,749
9,885,090
638
233.6
233.9
2.71
0.25
582,745
9,885,090
635
BGH161
No significant intercepts
BGH162
582851
9885512
764
270
-74
59.0
59.6
6.57
0.56
582,835
9,885,512
707
BGH163







583009







9885093







799







270







-70







409.7
417.1
3.37
7.36
582,868
9,885,098
411
420.7
422.1
0.55
1.42
582,865
9,885,098
403
423.8
429.0
0.74
5.24
582,863
9,885,099
399
429.6
429.9
1.96
0.3
582,862
9,885,099
396
432.0
433.0
0.59
1
582,860
9,885,099
393
BGH164

582776

9884574

797

270

-70

171.0
172.0
0.72
1
582,709
9,884,571
639
176.0
180.0
0.76
4
582,707
9,884,570
633
BGH165

582903

9885087

806

270

-60

242.9
247.2
2.41
4.27
582,771
9,885,083
600
248.4
250.0
2.14
1.61
582,769
9,885,083
597
BGH166



582823



9884623



806



270



-60



208.9
209.7
1.06
0.75
582,720
9,884,623
623
214.2
218.1
0.52
3.9
582,717
9,884,623
618
221.0
222.3
2.96
1.26
582,714
9,884,623
613
BGH167
582975
9885388
767
270
-53
195.7
200.5
1.85
4.86
582,856
9,885,388
609
BGH168

582982

9885169

770

270

-50

252.6
257.3
1.93
4.69
582,832
9,885,192
565
263.4
263.6
19.4
0.25
582,827
9,885,193
558
BGH169a
582823
9884616
794
270
-79
301.0
301.8
1.06
0.75
582,745
9,884,613
503
BGH170





583009





9885093





799





270





-60





365.0
370.1
2.5
5.1
582,830
9,885,095
478
371.9
376.0
2.16
4.15
582,827
9,885,095
473
376.9
377.1
3.94
0.25
582,825
9,885,095
470
388.9
390.0
1.13
1.1
582,819
9,885,096
459
BGH171



582982



9885169



770



270



-62



275.5
278.0
1.4
2.52
582,847
9,885,185
529
285.5
289.4
0.63
3.9
582,841
9,885,186
520
291.9
292.2
16.5
0.3
582,838
9,885,187
517
BGH172
No significant intercepts
BGH173



582982



9885167



766



270



-70



319.6
322.4
5.18
2.8
582,873
9,885,176
464
325.7
330.0
4.66
4.28
582,871
9,885,177
458
330.9
336.6
2.24
5.69
582,869
9,885,177
452
BGH174
583010
9885093
799
270
-50
363.5
366.0
0.81
2.5
582,791
9,885,091
507
BGH175





582976





9885388





767





270





-71





187.8
192.3
2.15
4.5
582,916
9,885,392
587
193.9
197.3
3.33
3.4
582,914
9,885,392
582
199.4
199.9
0.61
0.55
582,913
9,885,392
578
203.7
204.8
2.36
1.12
582,912
9,885,392
573
BGH176



582993



9884984



814



270



-78



512.7
516.2
1.1
3.46
582,849
9,884,970
321
518.0
522.3
2.44
4.25
582,847
9,884,970
315
525.5
528.0
1.64
2.55
582,845
9,884,969
309
BGH177



582958



9884766



831



253



-63



405.6
409.2
1.09
3.56
582,774
9,884,706
473
412.6
414.9
1.79
2.32
582,771
9,884,705
467
421.4
421.7
4.39
0.24
582,767
9,884,704
461
BGH178
No significant intercepts
BGH179
582959
9884769
831
248
-70
489.6
491.2
1.11
1.6
582,798
9,884,701
373
BGH180b



582774



9884571



794



270



-77



213.1
215.9
0.91
2.85
582,722
9,884,571
582
217.5
222.6
1.58
5.11
582,720
9,884,571
576
224.1
224.3
0.89
0.25
582,719
9,884,571
573
BGH181



582955



9884806



837



270



-63



369.5
372.5
1.41
3.02
582,778
9,884,809
511
377.3
379.5
8.38
2.21
582,774
9,884,809
505
385.4
385.7
1.2
0.3
582,770
9,884,809
499
BGH182









582953









9884875









835









270









-65









393.0
395.2
4.08
2.22
582,794
9,884,872
474
403.4
408.2
4.66
4.81
582,789
9,884,872
464
416.2
416.5
0.63
0.34
582,785
9,884,872
454
424.9
425.5
1.83
0.61
582,781
9,884,872
446
439.5
439.7
24.6
0.25
582,775
9,884,872
433
446.8
449.0
0.95
2.17
582,771
9,884,872
426
BGH183













582844













9884709













843













270













-71













285.7
289.0
0.83
3.33
582,749
9,884,711
572
290.0
293.5
2.69
3.54
582,747
9,884,711
568
296.0
296.7
1.08
0.7
582,746
9,884,711
564
299.3
303.4
4.67
4.14
582,744
9,884,711
559
305.5
306.1
5.89
0.65
582,742
9,884,711
555
309.8
313.2
2.99
3.44
582,740
9,884,711
550
314.1
318.0
1.52
3.9
582,738
9,884,711
546
322.0
323.9
0.86
1.86
582,736
9,884,711
539
BGH184













582957













9884767













834













270













-52













321.4
324.9
2.1
3.42
582,758
9,884,761
579
327.3
329.1
5.9
1.87
582,755
9,884,760
575
331.5
333.5
3.08
2.05
582,752
9,884,760
572
337.0
339.0
0.67
2
582,748
9,884,760
568
340.6
342.5
0.53
1.96
582,746
9,884,759
565
345.6
350.0
10.66
4.4
582,742
9,884,759
561
352.0
355.8
0.57
3.8
582,738
9,884,758
556
356.5
356.7
1.96
0.24
582,736
9,884,758
554
BGH185





582849





9884706





842





270





-75





326.4
331.8
1.95
5.31
582,760
9,884,706
525
332.8
335.6
1.99
2.83
582,758
9,884,706
521
339.7
342.0
0.73
2.3
582,756
9,884,706
514
345.1
345.4
1.66
0.26
582,754
9,884,706
510
BGH186







582953







9884802







834







270







-71







410.9
423.5
3.94
12.58
582,799
9,884,799
447
424.0
427.0
0.61
3
582,795
9,884,799
440
433.4
435.5
2.75
2.1
582,791
9,884,799
432
441.1
448.5
4.84
7.35
582,786
9,884,798
423
449.0
452.4
3.4
3.35
582,784
9,884,798
417
BGH187











582991











9884982











814











278











-61











365.7
368.4
1.65
2.73
582,808
9,885,001
496
372.5
373.0
1
0.51
582,805
9,885,001
491
375.6
376.0
0.75
0.45
582,804
9,885,002
489
381.9
385.4
7.44
3.5
582,800
9,885,002
482
387.9
391.0
2.4
3.12
582,797
9,885,002
477
394.2
394.5
2.38
0.25
582,794
9,885,002
473
409.6
410.0
25.3
0.4
582,786
9,885,003
460
BGH188
582991
9884982
814
284
-67
Independent assays still outstanding

Appendix 3: Checklist of Assessment and Reporting Criteria

Drilling techniques
All drillholes were diamond drill cored and drilled from surface (most intersections drilled using NQ size), holes drilled orientated in an east-west direction were angled between -60° and -70°. Holes collared in the west were drilled out in fan patterns into the side of a hill and angled between 0° and minus 35°.
Logging
All of the drillholes were geologically logged by qualified geologists. The logging is of an appropriate standard for grade estimation.
Drill sample recovery
Core recovery in the mineralised zones was observed to be very good and is on average 97%.
Sampling methods
Half core samples were collected continuously through the mineralised zones after being cut longitudinally in half using a diamond saw. Drillhole samples were taken at nominal 1 m intervals, which were adjusted to smaller intervals in order to target the cassiterite vein zones. Lithological contacts were honoured during the sampling. MSA’s observations indicated that the routine sampling was performed to a reasonable standard and is suitable for evaluation purposes.
Quality of assay data and laboratory tests
At the on-site ABM laboratory (managed by Anchem), samples were first checked off against the submission list supplied and then weighed and oven dried for 2 hours at 105 degrees Celsius. The dried samples were crushed by jaw crusher to 75% passing 2mm, from which a 250g riffle split was taken. This 250g split was pulverised in ring mills to 90% passing 75?m from which a sample for analysis was taken. Samples were homogenised using a corner-to-corner methodology and two samples were taken from each pulp, one of 10g for on-site laboratory assaying and another 150g sample for export and independent accredited 3rd party laboratory assaying.

Received samples at ALS Johannesburg are checked off against the list of samples supplied and logged in the system. Quality Control is performed by way of sieve tests every 50 samples and should a sample fail, the preceding 50 samples are ground in a ring mill pulveriser using a carbon steel ring set to 85 % passing 75?m. Samples are analysed for tin using method code ME-XRF05 conducted on a pressed pellet with 10% precision and an upper limit of 5,000ppm. The over-limit tin samples are analysed as fused disks according to method ME-XRF15c, which makes use of pre-oxidation and decomposition by fusion with 12:22 lithium borate flux containing 20% Sodium Nitrate as an oxidizing agent, with an upper detection limit of 79% Sn.

Prior to the 2021 drilling the assays were also conducted at ALS Global in Johannesburg where samples were analysed for tin using fused disc ME-XRF05 with 10% precision and an upper limit of 10 000 ppm. This was reduced to 5,000 ppm from 2014 onwards. Over limit samples were sent to Vancouver for ME-XRF10 which uses a Lithium Borate 50:50 flux with an upper detection limit of 60% and precision of 5%.

ME-ICP61, HF, HNO3, HCL04 and HCL leach with ICP-AES finish was used for 33 elements including base metals. ME-OG62, a four-acid digestion, was used on high grade samples for Pb, Zn, Cu & Ag.

External quality assurance of the laboratory assays for the Alphamin samples was monitored. Blank samples (299), certified reference materials (434) and duplicate samples (357) were inserted with the field samples accounting for approximately 11% of the total sample set.

The QAQC measures used by Alphamin revealed the following:
  • Blank samples indicated that no significant contamination occurred overall. Low levels of contamination (mostly <200 ppm Sn) mostly occurred, however 12 values between 229 ppm and 1,285 ppm were returned. Given the high grades at Bisie, the levels of contamination are not significant.
  • Five different CRMs were used with expected values between 0.18% and 31.42% Sn. The lower grade CRMs were prepared by Ore Research and Exploration (OREAS) and the two high grade CRMs (4.19% and 31.42% Sn) by the Bureau of Analysed Samples Ltd (BCS). In general, ALS returned values within the tolerance limits (three standard deviations) for the OREAS CRMs, although slightly lower than the expected values. Assays of the highest grade BCS CRM were mostly outside of the three standard deviation limits but within ±4%of the expected value. The update assays of the high grade BCS-355 CRM were within ±2% of the expected value with an overall low bias relative to the CRM expected value. For the 5.07% Sn BCS CRM, assays were consistently lower than the expected value by as much as 7%. This trend continued for the update assays with an average under-assay of 5% relative to the CRM expected value. Overall, the CRMs results indicate a slight negative bias for the ALS assays.
  • Coarse duplicates show mostly excellent correlation, indicating minimal error in the process and a high degree of repeatability.
Verification of sampling and assaying
The mineralisation in thirteen of the drillholes completed in 2021 at Mpama South were visually verified during a site-visits by the QP in August 2021 and several of the initial drillholes were examined during earlier site visits to Bisie. The QP observed the mineralisation in the cores and compared it with the assay results. It was found that the assays generally agreed with the observations made on the core. Core photos from the drilling programme have regularly been provided to the QP for inspection.

105 pulp duplicates were sent to SGS (Johannesburg) in November 2021 for confirmation assaying.
  • The pulp duplicates showed acceptable correlation with the ALS assays at both high- and low-grade ranges with an overall bias of near zero.
    • Average bias for grade ranges > 1% is less than 1%.
    • Tendency for ALS to be higher (~5%) for the grade ranges less than 1%.
  • Inter-lab precision (after removal of <0.10%) is 85% within 10% error and 95% within 20% error
Location of data points
The drillhole collar positions were surveyed using a differential GPS.

Downhole surveys were completed using a multishot down-hole survey instrument (Reflex EZ-Track), or north seeking gyro (Reflex EZ-Gyro / Reflex Gyro Sprint-IQ).
Tonnage factors (in situ bulk densities)
Relative density measurements were made on the majority of recent drillhole samples using the Archimedes Principle of weight n air versus weight in water. A regression formula of tin grade against relative density was developed and applied to the samples that did not have direct measurements. The assigned specific gravity was interpolated into the block model using ordinary kriging.
Data density and distribution
A total of 124 holes were drilled in Mpama South. An additional 6 holes previously drilled in the Wedge area of Mpama North have been included in the Mineral Resource. Holes were drilled steeply from east to west, along section lines spaced approximately 60 m to 80 m apart. Several sets of holes were drilled in a fan pattern into the side of a steep hill, with orientations spanning from the northeast to the southeast (from azimuth 045° to 125°). These drillholes fans intersect the mineralisation 25 m to 40 m apart in most of the Mineral Resource area.
Database integrity
Data was provided as Excel files. MSA completed spot checks on the database and is confident that the Alphamin database is an accurate representation of the original data collected.
Dimensions
The mineralisation consists of seven zones, with a total extent of 950 m along strike. MZ1 has a strike length of 950 m and 500 m down-dip and MZ2 has a strike length of 650 m and 500 m down-dip. Together, these two zones account for 88% of the Mineral Resource. The zones occurring in the footwall and hangingwall of the MZ1 and MZ2 tend to be narrower and irregular in shape with strike lengths from 100 m to 300 m. MZ6, which is located to the south has a strike length of 270 m and a dip length of 110 m.
Geological interpretation
The mineralised intersections are clearly discernible in drill core. The Mineral Resource is interpreted to occur as irregular veins and disseminations of cassiterite that when combined form tabular mineralised zones, dipping 65-70° to the east. The mineralised zones are hosted in chlorite schist that is the result of intense hydrothermal alteration associated with a fracture system.

MZ1 is the largest zone by volume of the Mineral Resource, with an extent of 950 m and an average thickness of 4.1 m. MZ2 is the second largest zone, with a strike length of 650 m and an average thickness of 3.4 m. However, the thicknesses of these two zones vary from as little as 1 m, up to 13 m thick.

Three smaller zones (MZ3 to MZ5) occur in the footwall of the main zones of mineralisation which progressively become narrower, moving away from the main zones. MZ3 thickness ranges from 1 m to 9 m with an average thickness of 1.5 m. MZ4 has an average thickness of 1 m, attaining a maximum thickness of 5 m. MZ5 has an average thickness of 1.2 m, ranging from 1 m to 5 m. All zones become narrower along the edges, where they pinch-out.

A narrow zone (MZ7) occurs in the hangingwall of the main mineralisation with an average thickness of 0.5 m and a maximum thickness of 4 m.

MZ6, which occurs to the south, tends to be lower in grade and has an average thickness of 4 m, ranging from 1 m up to 9 m. MZ6 is not part of the Mineral Resource.

A three-dimensional wireframe model was created for the seven zones of mineralisation based on a grade threshold of 0.40% Sn. MZ1 and MZ2 make up the main zone, which are the most consistent zones and occur within a persistent chlorite schist. Narrower less continuous zones occur above and below the main zone within chlorite-mica schists.
Domains
The mineralisation was modelled as seven tabular zones containing irregular vein style mineralisation. A hard boundary was used to select data for estimation in order to honour the sharp nature of vein boundaries.
Compositing
Sample lengths were composited to 1 m by length and density weighting.
Statistics and variography
Statistics for the seven estimation domains show distributions that are positively skewed with coefficients of variation (CV) ranging from 1.3 to 1.96, the only exception being domain MZ7 which shows lower variability due to very few composites resulting in a CV of 0.79.

The two main zones (MZ1 and MZ2) have similar average tin grades (2.22% and 2.11% respectively). The smaller, footwall zones (MZ3 to MZ5) are higher in tin grade with averages ranging from 3% to 4.41% while MZ6 and MZ7 are lower in tin grade, with an average of 0.63% and 1.07% respectively.

Normal Scores semivariograms were calculated in the plane of the mineralisation, down-hole and across strike. Variograms were modelled for tin, with a range of 40 m within the plane of mineralisation and with a range of 3 m across the structures.
Top or bottom cuts for grades
Top caps were applied to outlier values, identified as breaks in the cumulative, probability plots.
Data clustering
Data clustering occurs where the fan drilling, collared on the western side of the deposit, intersect the surface drilling collared in the east, resulting in a data spacing of 25 m to 40 m towards the centre of the deposit. Outside of this area, the grid spacing becomes more regular, 60m to 80 m along strike and 50 m down-dip.
Block size
A rotated block model with a parent cell of 10 mX by 10 mY by 2 mZ was used. Sub-celling was used to divide the parent cells to a minimum sub-cell of 1 mX by 1mY by 0.2 mZ to closely fit the narrow portions of the vein structures
Grade estimation
Tin, copper, lead, zinc, silver, arsenic and density were estimated using ordinary kriging. A minimum number of 5 and a maximum of 10 one metre composites were required for the tin and density estimates. A minimum of 5 and maximum of 8 composites were used for the other elements.

Estimation was carried out in three passes, with the first pass using search volumes coinciding with the variogram ranges. A second pass estimate expanded the search volumes by a factor of 1.5 to estimate blocks where insufficient samples were present for an estimate in the first pass. Where blocks remained un-estimated from the first two passes, a third pass, using an expansion factor of 10 was used to ensure all blocks in the model received a grade and density estimate.

Dynamic Anisotropy was used to orientate the search volumes to the strike and dip of the individual mineralised zones.
Resource classification
Indicated Mineral Resources were declared where the drillhole spacing is approximately 40 m and where the geological model has low variability. The remainder of the interpreted model was classified as Inferred Mineral Resources, corresponding to areas informed by drilling spaced 50 m to 80 m apart with a maximum extrapolation of 20 m from the nearest drillhole.
Mining cuts and cut-off grade assumptions.
A minimum of 1 m was applied to the mineralisation model. The thickness, grade and steep dip implies that the Mineral Resource can be extracted using established underground mining methods similar to those applied at Mpama North.

A 1% cut-off grade was applied based on the Mpama North costs and prevailing tin price.

Isolated blocks above cut-off grade in dominantly low-grade areas of the model were not included in the Mineral Resource
Metallurgical factors or assumptions
The tin mineralisation occurs as cassiterite, an oxide of tin (SnO 2 ). At Mpama North gravity separation is used to produce a tin concentrate. The Cu, Zn and Pb mineralisation occurs as sulphides, which are removed by flotation to create the cassiterite product. It is assumed that similar processes will be used to process the Mpama South mineralisation.
Legal aspects and tenure
Alphamin through its wholly owned DRC subsidiary, Alphamin Mining Bisie SA, has a Mining License PE 13155 which includes the Bisie Tin Mine. Alphamin has an 84.14 percent interest in ABM. The Government of the Democratic Republic of Congo (GDRC) has a non-dilutive, 5% share in ABM.
Audits, reviews and site inspection
The following review work was completed by MSA:
  • Inspection of approximately 20% of mineralised core intersections used in the Maiden Mineral Resource estimate.
  • Database checks.
  • Inspection of Mpama South drill sites in August 2021.
  • On-site review of the exploration processes.
  • Laboratory inspections.



1 Based on d ata obtained from International Tin Association Tin Industry Review 202 2
2 See News Announcement 7 March 2022 for Preliminary Economic Assessment and Resources
3 CIM Definition: An Indicated Mineral Resource is that part of a Mineral Resource for which quantity, grade or quality, densities, shape and physical characteristics are estimated with sufficient confidence to allow the application of Modifying Factors insufficient detail to support mine planning and evaluation of the economic viability of the deposit.
4 CIM Definition: An Inferred Mineral Resource is that part of a Mineral Resource for which quantity and grade or quality are estimated on the basis of limited geological evidence and sampling. Geological evidence is sufficient to imply but not verify geological and grade or quality continuity.


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