Eastport Critical Metals concludes Phase II Exploration at Selebi-East Project

Eastport Critical Metals Corp. is pleased to announce the completion of the Phase II Geochemistry and Geophysical Exploration Program at the Selebi-East Project which is prospective for nickel, copper and platinum group elements (“PGE”), in northeast Botswana. The Phase II program initial results were announced August 12, 2026. The Program built on existing geochemical soil anomalies and untested geophysical conductors within the same geological domain as the nearby Selebi Mine held by NexMetals Mining Corp. (see Figure 1 for Location Map).

Daniel Major, Chief Executive Officer, commented; “The completion of the Phase II soil sampling at our Selebi-East project has been of great value as we look to commence geophysics and final drill target definition.

The soil geochemistry confirms a number of highly encouraging vectors which signature replicate the regional setting of the NexMetals Selebi Mine, a mine that was in production for over ~40 years. Significantly, these multiple soil anomaly vectors are also of district scale.

The work that the team have conducted to date puts Eastport in a fantastic position to progress to drilling. I look forward to providing further updates at Selebi-East pending engagement for geophysics.”

The NexMetals Selebi Mine is a past-producing underground copper, nickel, and cobalt operation. According to NexMetals reporting, there are considerable remaining nickel and copper resources and ongoing exploration drilling indicates the deposit remains open at depth.

The soil geochemical sampling method that has defined Eastport’s multi-kilometre nickel-copper soil anomalies is the same exploration technique used by Bamangwato Concessions Limited (“BCL”) to discover the neighbouring Selebi Mine in 1963. BCL’s geochemical soil sampling conducted in stages from 1959 to 1963, defined a clear 1.6km long nickel-copper anomaly sitting over the surface expression of the underlying amphibolite geology. That anomaly became a formal mineral discovery mid-1963, when subsequent drilling by BCL, targeting the anomaly, intersected sulphides hosted within the amphibolite.

At the Selebi Mine, the weathering of near-surface mineralised amphibolite released nickel and copper into the residual soils, creating a coherent 1.6km geochemical anomaly directly overlying the host rock, which guided the drilling that discovered the sulphide mineralisation.

Eastport’s current geochemical results are interpreted to show a comparable spatial coincidence between elevated nickel-copper values in soil and the mapped amphibolite units within the same Selebi-Phikwe Belt. Whilst soil anomalies alone do not confirm the presence of economic mineralisation at depth, the repeated association of this geochemical signature with amphibolite-hosted deposit across the belt increases the potential that similar mineralising systems may be present at the Selebi-East Project.

The Selebi-East Project, located only seven kilometres from the Selebi Mine, comprises five prospecting Licenses where historical exploration has identified potential nickel-copper mineralisation.

Quality Assurance/ Quality Control

The Company employed the following methodology to collect each soil sample. A small area (0.25 m2) was shovel scrapped to clear the surface of organic matter and larger loose material. A small hole was dug to approximately 30cm and then a sample was collected. At each site approximately 4-5kg of soil was passed through a sieve nest to collect only material passing the 4mm sieve. A duplicate sample was collected at every 20th station. The sample was bagged and tagged and transported back to the camp.

At the base camp each sample was split into two using a riffle splitter; one for a backup archive and the second for export to ALS Global in Johannesburg. Both samples are placed in clear plastic bags with sample tags stapled into the folded lip to protect the tag. Samples were exported in batches of approximately 20 per plastic-woven sack, under cover of Export Permits, by courier. Each plastic-woven sack is secured using cable ties.

At ALS each sample was weighed and then screened to -180μm. The -180μm was prepared using PREP41 followed by ME-MS41L, an ICP-MS technique. The received weight was reported along with 34 elements. ALS also inserts a series of standards, duplicates and blanks inserting on average 20 per 100 samples. The results of the QA/QC inserts are reported to the Company. Pulps are periodically returned to Eastport in Botswana.