Andrada Mining Limited announced an inferred, JORC (2012), MRE for tin over 11 historically mined pegmatite bodies located close to the actively mined V1/V2 pegmatite at the Uis Mine. These 11 pegmatites have been collectively termed the Proximal Pegmatites and are located within a 3 km radius from the existing processing plant. Locality: The mining licence ML134 hosts the Uis Mine.

The Uis town is located approximately 200 km northeast of the port of Walvis Bay in Namibia. Background: The mining licence of the Uis Mine (ML134) comprises a swarm of more than 180 pegmatites. The historical Uis Mine focused on 12 of these pegmatites which were mined by open cast methods before operations were halted in 1990.

During that time a comprehensive exploration drilling programme was undertaken, resulting in an extensive database with tin analyses. MRE - V1/V2 Pegmatite: On 16 September 2019 the Company announced a maiden MRE comprising 71.54 Mt of ore over one of the 12 pegmatites, namely the combined V1/V2 pegmatite. The MRE was derived from 141 historical drill holes and 26 confirmatory holes drilled by Andrada during 2019.

MRE - Proximal Pegmatites: The balance of the historically mined pegmatites have been incorporated into this report, based on a further 809 historical drill holes. Minxcon (Pty) Ltd, a leading exploration consultancy, was appointed to undertake the compilation of the tin block model over the mineralised Proximal Pegmatites. Mineralised envelopes were modelled using lithological logs sourced from the surface drillholes and surface mapping of geological contacts.

The wireframes were clipped to the drillhole data and extended along interpreted strike and down-dip extensions. The mineralised envelopes were modelled to define moderate (30°) to steeply (70°) dipping pegmatitic zones which occur within the K, P and V clusters.  Individual clusters are characterised by one or two dominant pegmatites, with numerous associated splay pegmatites. Strikes vary from east-west to southwest-northeast, with variable dips within the same cluster.

Geological, and geostatistical domains were delineated based on lithological contacts. Each modelled pegmatite was treated as a separate domain. Selected one-metre sample composites from within the modelled mineralised envelopes, defined the final dataset used for the geostatistical analysis and block model estimation.

The mineral resource estimates are spatially coincident, with mineralisation confined to the pegmatite contacts. The pit shell definition was based on an average tin price of USD 30,000/t with ore losses and mining dilution set at 2%. The assumed pit slope angles and metallurgical recovery for Sn were 55° and 64% respectively.

Mining, treatment, G&A and selling cost parameters were provided by Andrada and approved by Minxcon. The open pit Mineral Resource figures are stated at a cut-off grade of 0.03% Sn. Although the historical data has a lower confidence due to the absence of physical core, it is deemed sufficiently reliable by the Competent Person to allow the declaration of an Inferred Mineral Resource.

The historical drillhole database has sufficient data density (with a 25m to 50m grid spacing) to allow for the estimation of a Measured or Indicated Mineral Resource if the requisite QAQC constraints are in place and a confirmatory drilling programme is undertaken. The Company carried out a confirmatory drilling programme in 2018/2019 on the V1/V2 and determined that the historical ISCOR drillhole data correlates well with the recent check sampling. Accordingly, a Measured, Indicated and Inferred Mineral Resource Estimate was declared in 2019 for the V1/V2 pegmatite by CSA Global.