Raptor Metals has launched a multi-element assay program on archived drill core at its Chester Project, aiming to unlock the polymetallic potential of its existing copper resource in Canada’s Bathurst Mining Camp.
- Sampling of 20 historic drill holes within existing 6.685 Mt copper resource
- Focus on lead, zinc, silver, cobalt, and indium assays to complement copper data
- Program leverages archived core to avoid costly new drilling
- Results expected within six weeks to inform updated resource modelling
- Chester sits in a prolific polymetallic volcanogenic massive sulphide district
Historic Core Sampling to Enhance Polymetallic Data
Raptor Metals Ltd (ASX:RAP) has kicked off a targeted sampling campaign on 20 historic diamond drill holes at its wholly owned Chester Project in New Brunswick, Canada. The initiative aims to bolster the polymetallic dataset underpinning the project’s existing JORC 2012 Mineral Resource Estimate of 6.685 million tonnes at 1.07% copper, by adding assays for lead, zinc, silver, cobalt, and indium; elements historically under-sampled in the drill database.
The program utilises approximately 1,000 metres of archived core, avoiding the expense and time of new drilling while enabling a more comprehensive geochemical picture of Chester’s volcanogenic massive sulphide (VMS) system. Core cutting and sampling commenced on 5 September 2026, with assay results anticipated within four to six weeks.
Polymetallic Potential in a Renowned Mining Camp
Chester lies within the Bathurst Mining Camp, a prolific VMS district known for polymetallic deposits rich in zinc, lead, copper, silver, and sometimes cobalt and indium. The project’s Mineral Resource already includes significant lead, zinc, and silver alongside copper, but inconsistent historic sampling has left gaps in the multi-element data.
Raptor’s Managing Director Brett Wallace highlighted the opportunity: "Much of our historic core has simply never been tested for zinc, lead, silver, cobalt or indium. If this program confirms continuity across the deposit, it potentially provides a more complete picture of Chester’s polymetallic endowment and supports future Mineral Resource evaluation." This approach builds on the company’s recent drilling, geophysics, and metallurgical work, aiming to refine the geological model without delay or excessive cost.
Resource Base and Geological Setting
The current Mineral Resource at Chester comprises an Indicated category of 4.87 Mt at 1.13% copper, containing over 120 million pounds of copper as well as notable lead, zinc, and silver, plus an Inferred category of 1.82 Mt at 1.01% copper. These figures underpin Raptor’s evaluation of growth opportunities within the project.
Geologically, Chester is interpreted as a stacked VMS system with three main mineralised zones: Central, East, and Copper Stringer. The Copper Stringer Zone is considered a feeder zone, marked by alteration minerals and chalcopyrite mineralisation. This complex setting is typical of the Bathurst Camp’s polymetallic deposits, which Raptor aims to better understand through the enhanced assay data.
Program Details and Next Steps
The sampling program involves retrieval, re-logging, and cutting of archived core intervals identified as massive sulphide mineralisation within the existing resource footprint. Samples will undergo multi-element analysis using four-acid digest with ICP-MS/ICP-OES techniques, including silver-specific finishes to accurately capture trace metals.
Once assay results arrive, the company plans to validate and interpret the data alongside the existing geological and assay database. Subject to outcomes, Raptor intends to incorporate the new polymetallic data into an updated Mineral Resource Estimate in line with JORC Code (2012) standards.
This program complements Raptor’s recent success in confirming a large stacked copper-rich VMS system at Chester through maiden drilling, which extended mineralisation over a 2.5-kilometre strike length large-scale stacked copper-rich VMS system. The polymetallic assay update could provide a fuller picture of the deposit’s value and guide future exploration and development.
Bottom Line?
The polymetallic sampling program could materially enhance Chester’s resource profile if assays confirm continuity, setting the stage for a resource upgrade and refined project economics.
Questions in the middle?
- Will polymetallic assays reveal significant zinc, lead, or indium grades previously unaccounted for?
- How might the updated resource estimate impact Raptor’s development timeline and capital requirements?
- Could this approach of leveraging archived core become a model for other polymetallic VMS projects?