Zymo
Large copper-gold porphyry system with significant historical drilling and untested targets.
On June 30, 2026, Eastfield entered into a definitive agreement to sell its 100% interest in the Zymo property, together with its 95.3% interest in the Indata property, to Star Copper Corp. (TSX-V: STCU). The transaction is subject to shareholder approval and TSX Venture Exchange acceptance and has not closed. The technical information below summarizes exploration completed by Eastfield prior to the proposed transaction.
- Generative
- Reconnaissance
- Target Definition
- Drill Ready
- Partner Drilling
Project Overview
The Zymo property is an 18,184-hectare copper-gold porphyry project located 45 km west of Smithers, BC, within the Stikine Terrane. The property hosts a large porphyry system with historical drilling and remains open along strike and at depth. Access is by helicopter from Smithers during the field season. Transaction notice: On June 30, 2026, Eastfield entered into a definitive agreement to sell its 100% interest in Zymo, together with its 95.3% interest in the Indata property, to Star Copper Corp. (TSX-V: STCU) for 10.0 million common shares of Star Copper. The transaction constitutes a Reviewable Disposition and a Related Party Transaction and is subject to shareholder approval and TSX Venture Exchange acceptance. The transaction has not closed.
Geology & Target Model
Zymo is situated within the Stikine Terrane of central British Columbia. Mineralization is associated with Late Cretaceous bulk-tonnage style porphyry intrusions intruding Jurassic Hazelton Group volcanic rocks. Copper and gold occur as disseminated and fracture-controlled chalcopyrite and pyrite within potassic and propylitic alteration envelopes. The property hosts at least four copper-gold porphyry occurrences — the drilled Hobbes and FM zones, and the untested RD and URC zones, which display coincident gold-in-soil, magnetic and induced-polarization anomalies — distributed along an eight-kilometre-long chargeability anomaly.
Technical Highlights
A five-axis snapshot of the asset: physical footprint of the mineralized system, drilling history and intent, geophysical signature, optionality retained for shareholders, and the regional scale at which the project operates. Quantitative values shown are management estimates pending Qualified Person verification.
Open-ended IP chargeability anomaly · responses >20 mV/V
Completed to date · intercepts pending QP verification
Refined by 2025 3D data-synthesis program
Porphyry system open along strike and at depth
Stikine Terrane · 45 km W of Smithers, BC
Exploration Highlights
- 01
The property hosts at least four copper-gold porphyry occurrences — the drilled Hobbes and FM zones and the untested RD and URC zones — distributed along the 8-kilometre chargeability anomaly.
- 02
Thirty-four drill holes totalling 10,810 metres have been completed on the property.
- 03
An 8 km long by 2 km wide open-ended induced polarization anomaly, with extensive areas returning chargeability responses greater than 20 mV/V, defines the copper-gold porphyry system.
- 04
Untested geophysical targets refined during the 2025 data-synthesis and 3D modelling program.
- 05
Mineralization remains open along strike and at depth.
Maps, Figures & Camp
Ownership, Partner Status & Next Steps
Ownership & Option Status
Eastfield holds a 100% interest in Zymo, subject to an underlying royalty retained by the original property vendor and to the pending transaction. On June 30, 2026, Eastfield entered into a definitive agreement to sell its interest in Zymo to Star Copper Corp. — subject to shareholder approval and TSX Venture Exchange acceptance; the transaction has not closed.
Planned Next Steps
Complete the shareholder-approval and TSX Venture Exchange acceptance process for the announced sale to Star Copper Corp. Zymo is permitted for additional exploration, including up to 50 drill sites under a five-year permit valid through December 2029; no current drill program has been publicly announced.
Technical Disclosure — National Instrument 43-101
Scientific and technical information on this page is subject to verification by a Qualified Person as defined by National Instrument 43-101 — Standards of Disclosure for Mineral Projects. J.W. (Bill) Morton, P.Geo., President and CEO, and Glen Garratt, P.Geo., Vice President, Exploration, serve as the Company's designated Qualified Persons.
Project History & Timeline
- 1987First discovery on Zymo Ridge
Corona Corporation notes anomalous gold in a quartz-sericite-pyrite altered intrusion at Red Canyon Creek while following up a government regional geochemical survey.
- 1999Freeport drills the FM Zone
Freeport (Freeport-McMoRan) options the property and drills six core holes at the FM Zone, confirming the presence of a potentially large porphyry system.
- 2004Airborne geophysical survey
NDT Ventures Ltd. completes an 823 line-kilometre airborne geophysical survey over the property.
- 2007Eastfield options Zymo; Hobbes discovery
Eastfield options the property and discovers the Hobbes Zone during a reconnaissance exploration programme.
- 2008–2009Partner-funded drilling at Hobbes
Exploration funded by NGEx Resources Inc. (a Lundin-controlled company) advances the Hobbes Zone, which is extended to over 600 metres along strike and remains open-ended.
- 2011–2012Earn-in completed
Exploration funded by Bearing Resources Ltd. completes the earn-in with the original vendors; Eastfield holds 100%, subject to an underlying vendor royalty.
- 2024Claim group expanded
The claim group is expanded to cover additional airborne geophysical targets.
- 20253D data synthesis
Independent consultants integrate historical drilling, geochemistry, and geophysics into a 3D geological model, refining untested targets.
- June 2026Definitive sale agreement announced
Eastfield signs a definitive agreement to sell its 100% interest in Zymo (together with Indata) to Star Copper Corp. for 10.0 million shares — subject to shareholder approval and TSX Venture Exchange acceptance; the transaction has not closed.
Exploration Programs
Diamond drilling
CompletedThirty-four drill holes totalling 10,810 metres completed on the property.
3D data synthesis & modelling
CompletedIntegration of legacy drill, soil, and IP data into a modern 3D model to rank untested porphyry targets.
Future drilling potential
PermittedZymo is permitted for additional exploration, including up to 50 drill sites under a five-year permit valid through December 2029. No current drill program has been publicly announced.
Technical Reports & Disclosure
March 2019
Independent technical report on the Zymo property, filed by Eastfield and available on the Company's website. Refer to the report itself for the Qualified Person, effective date, and all technical detail.
View PDFHistorical
Official soil and rock geochemistry map (gold) for the Zymo property, hosted on the Company's website. Historical reference figure.
View PDFHistorical
Official soil and rock geochemistry map (zinc) for the Zymo property, hosted on the Company's website. Historical reference figure.
View PDFHistorical
Official soil and rock geochemistry map (arsenic) for the Zymo property, hosted on the Company's website. Historical reference figure.
View PDF1990s–2000s
Prior-operator exploration filings held in the BC government ARIS database. Historical and not verified by Eastfield's QP.
2025
Internal targeting study. Not an NI 43-101 technical report; no mineral resource is estimated.
Formal NI 43-101 technical reports, when filed, are available under the Company's profile on SEDAR+. Documents listed above include historical, third-party, and internal materials that have not been verified by Eastfield's Qualified Person.
Frequently Asked Questions
Who owns Zymo?
Eastfield Resources owns 100% of the Zymo property, subject to the pending transaction. On June 30, 2026, Eastfield announced a definitive agreement to sell its interest to Star Copper Corp.; the transaction is subject to shareholder approval and TSX Venture Exchange acceptance and has not closed.
Does Zymo have a mineral resource estimate?
No. Drilling to date does not support a mineral resource under NI 43-101.
What happens next at Zymo?
Completion of the announced sale to Star Copper Corp. remains subject to shareholder approval and TSX Venture Exchange acceptance. Target ranking from the 2025 3D model supports a proposed initial diamond drill program.
Related Knowledge & Resources
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Formal NI 43-101 technical reports for Eastfield's properties are filed under the Company's profile on SEDAR+.
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