Assay results demonstrate the apparent thickness of Nak-Main, with three holes intersecting more than 100m of copper mineralisation including internal higher-grade zones of 0.5% to 1.5 % Cu
Vancouver, British Columbia--(Newsfile Corp. - July 20, 2026) - Eastport Critical Metals Corp. (TSXV: EVI) (OTCQB: EVIIF) ("Eastport" or the "Company") is pleased to announce positive assay results from the diamond drilling program at the Matsitama Copper Project.
The first batch of assay results comprising 6 holes drilled as part of the NAK-Main zone historical resource infill drilling program announced on May 1, 2026 (link here .) have been received, with 5 holes confirming the presence of a thick copper-rich mineralised zone at the Nakalakwana deposit (see Figures 1 & 2).
Daniel Major, CEO, commented ; "The first batch of assay results from the Phase One drilling at the Nak-Main zone are extremely encouraging and successfully confirm the historical results demonstrating continuous copper mineralisation over 100 metres with multiple higher grade zones.
The primary objective of this Phase One programme was to validate the historical drilling and to allow us to bring the historical SAMREC 2007 compliant mineral resource estimate into compliance with a future planned 43-101 compliant mineral resource update. In addition to proving up the Nak-Main zone resource potential, the step-out drilling assay results, which are currently awaited, will test the strike extent east and west of Nak-Main that represents a consolidated length of more than 10km.
We look forward to releasing further results for Nak-Main and the step-out drilling at Nak-East and West in due course."
Drill Hole NAKDD25-008 mineralised for over 28 m from 160m downhole but average grades below 1000 ppm Cu (composite 28.2m @ 338 ppm Cu).
The Company's flagship Matsitama Copper Project in northeast Botswana, encompasses a contiguous block of six Prospecting Licenses ("PLs") covering approximately 1,845 km 2 and near the village of Matsitama, approximately 85 km west of Francistown.
Historical exploration at Matsitama, including soil sampling programs, has highlighted widespread anomalous copper over the PLs. The copper anomalies combined with the presence of two copper mines (one operating and one historical) and a historical mineral resource (see below) at Nakalakwana, supports the Company's view that further exploration at the Matsitama Copper Project is likely to identify additional mineralised zones.
Eastport does not consider the 2013 SRK Consulting (South Africa) Pty Limited ("SRK") mineral resource as current. SRK was contracted by Matsitama Minerals (Pty) Ltd ("Matsitama") to undertake the update of the Mineral Resources for the Nakalakwana Hill copper deposit on the basis of data from 30 drillholes completed during 2012. Mineral Resources classified as Indicated and Inferred in accordance with the definitions and guidelines of the SAMREC Code 2007 edition were reported from the optimistic pit as shown in Table 2.