Arbor Metals Corp. Reports Phase 1 2026 Drilling Results from Jarnet Lithium Project

Vancouver, Canada — September 3, 2026 — Leads & Copy — Arbor Metals Corp. has announced the results of its Phase 1 2026 diamond drilling program at its Jarnet Lithium Project in Quebec's Eeyou Istchee James Bay region, reporting significant lithium and rare earth element (REE) grades. The program, which comprised five holes totaling 1433 meters, was conducted adjacent to Patriot Battery Metals’ Shaakichiuwaanaan Property.

Key findings from the Phase 1 program include intervals with elevated lithium content, such as 260 parts per million (ppm) lithium over 0.61 meters in hole JAR26-37, located between 227.39 and 228.00 meters. A total of 56 samples returned grades greater than 150 ppm lithium, averaging 174.8 ppm, with eight samples exceeding 200 ppm. These elevated lithium values were consistently found within greywacke sediments, indicating that the lithium enrichment is hosted within this geological unit rather than in discrete pegmatites.

The drilling also identified rare earth element (REE) mineralization, with total REE (TREE) grades ranging from 95.4 ppm to 307.7 ppm. The best TREE result was 307.7 ppm over 1.00 meter in hole JAR26-39, from 119.00 to 120.00 meters, which was notably heavy-rare-earth-rich with 185.0 ppm HREE. The program returned 122 reported intervals, with 78 exceeding 150 ppm TREE, suggesting a pervasive low-grade REE-enriched envelope throughout the drilled area. Eighteen intervals surpassed 200 ppm TREE, with one exceeding 300 ppm.

Arbor Metals Corp. noted that lithium grades show no correlation with rare earth tenor in the analyzed samples, indicating that the lithium and REE systems at Jarnet are decoupled. While most REE intervals are LREE-dominated, some, including a significant interval in JAR26-39 and two in JAR26-41, displayed strongly HREE-weighted signatures that the Company considers worthy of follow-up exploration.

The Phase 1 2026 drill program was designed to build upon lithium mineralization identified in the 2025 exploration programs. Drilling efforts focused on the Jarnet 2 claim block, targeting a prominent linear lithium anomaly. Holes JAR26-40 and JAR26-41 were drilled to extend lithium mineralization previously identified in 2025 pegmatite intercepts.

Mark Ferguson, President and CEO of Arbor, stated, “Our Phase 1 2026 drill program has given us a substantial new dataset at Jarnet. The program returned a best result of 260 ppm Li over 0.61 m in JAR26-37 and 307.7 ppm TREE over 1.00 m in JAR26-39, together with a broad low-grade rare earth envelope across all five holes. We will use this new data to refine our targeting for the next phase of exploration at Jarnet.”

The drilling was executed by Forage et Construction Muskw, a joint venture involving Forage Fusion Drilling and the Cree community, represented by Saskounan. Muskw, based in Chisasibi, Quebec, is co-owned and operated by local and Indigenous stakeholders. Arbor highlighted Muskw’s involvement as an example of successful local and Indigenous ownership and Arbor's commitment to community engagement and economic development.

Hole depths ranged from 189.95 to 337.59 meters. A total of 700 samples, including QA/QC samples, were collected and analyzed by ALS Laboratories in Sudbury, Ontario. Granitic pegmatites and sulfide mineralization were encountered and sampled across all four drill holes in the program.

Arbor Metals Corp. reiterated its commitment to environmental stewardship, adhering to industry-leading guidelines and collaborating with local tribes and stakeholders to align its activities with community needs and concerns.

Francis R. Newton, PGeo, a consultant to Arbor and a qualified person under National Instrument 43-101, has reviewed and approved the technical information in the press release.

Arbor Metals Corp. is a mining exploration company focused on developing high-value mineral projects globally. Its Jarnet, Corvette Lake, and St. Pierre lithium projects in Quebec encompass approximately 5,606 hectares and are contiguous to a property where significant lithium mineralization has been confirmed.

Source: Arbor Metals Corp.