VANCOUVER, British Columbia, Nov. 18, 2021 (GLOBE NEWSWIRE) — FIREWEED ZINC LTD. (“Fireweed”) (TSXV: FWZ) is pleased to announce further results from the 2021 drilling program at the Macmillan Pass project, Yukon, Canada. Results from this step-out hole continue to show that Boundary Zone is growing and expand the known extent of the wide zones of vein-hosted mineralization.


  • A new, copper-rich style of mineralization was encountered in NB21-005, grading 1.54% copper, 5.42% zinc, 0.04% lead, and 5.6 g/t silver over 2.00 m.
  • Step-out hole NB21-005 intersected a wide zone of vein hosted mineralization at Boundary Zone grading 2.35% zinc, 0.01% lead, and 4.6 g/t silver over 203.05 m, extending the mineralized zone to depth.
  • The broader 203.05 m intersection included wide higher-grade zones such as 34.45 m of 4.61% zinc, 0.01% lead, and 8.9 g/t silver.

CEO Statement

Brandon Macdonald, CEO, stated, “These intriguing drill results show a new style of mineralization and brings copper into the mix at Boundary Zone. This is an encouraging sign of the system becoming hotter as we continue to expand the known zone of mineralization with more and more step-outs. This is the first discovery of meaningful copper grades in core at the Macmillan Pass project and we are excited to follow up on this new style of copper-zinc mineralization in the coming drill programs.”

Boundary Zone Drilling Results

Hole NB21-005 was drilled as a down-dip step-out to the known zinc mineralization at Boundary Main and intersected 203.05 m of 2.35% Zn, 0.01% Pb, and 4.6 g/t Ag including wide zones of significantly higher grade such as 34.45 m of 4.61% Zn, 0.01% Pb, and 8.9 g/t Ag and 38.54 m of 3.47% Zn, 0.01% Pb, and 4.3 g/t Ag. Vein-hosted sphalerite and disseminated sphalerite mineralization was encountered within conglomerates, mudstones and carbonate-altered mafic volcaniclastic rocks. A narrow, 2.00 m intersection of copper-rich mineralization comprised brecciated rock with a network of thin pyrite-sphalerite-chalcopyrite veinlets and graded 1.54% Cu, 5.42% Zn, 0.04% Pb and 5.7 g/t Ag – a style of mineralization not previously encountered on the Macmillan Pass project. The copper-rich intersection is located at a vertical depth of only 60 m from surface. Drill hole NB21-005 confirmed a large width for the zone of zinc mineralization originally intersected in down-dip hole NB20-002 (see Cross Section A-A’). Boundary Zone has now been tested to a vertical depth of approximately 350 m and the mineralized zone remains open at depth.

Table 1: Drill Results, Boundary Zone.

Hole From
NB21-005 65.0067.002.00(70%)5.420.041.545.72.765V
NB21-005 109.95313.00203.052.350., R, SM
NB21-005incl.147.85161.7513.903.670., V
NB21-005and180.25214.7034.454.610., V
NB21-005and254.25266.0711.825.600.020.0112.52.907R, V
NB21-005and274.46313.0038.54(59%)3.470., V
NB21-005 367.00373.006.001.580.
NB21-005 383.80396.0912.292.790.490.0111.33.068V, R

SM – semi massive sulphide; V – vein; R – replacement; L – laminated; incl. – including.
1True widths of stratiform, laminated mineralization, and semi-massive mineralization are estimated to be approximately 60 to 80% of intersected widths. Vein-hosted mineralization is interpreted to be a stockwork style with an undetermined true thickness.
Low recovery zone, core recovery indicated in parentheses.

Notes on sampling, assaying, and data aggregation:  

The diamond drill core logging and sampling program was carried out under a rigorous quality assurance / quality control program using industry best practices. Drill intersections in this release are all HQ3 (split tube) size core (61.1mm / 2.4-inch diameter) with recoveries typically above 85% unless otherwise noted in the table of results. After drilling, core was logged for geology, structure, and geotechnical characteristics, then marked for sampling and photographed on site. The cores for analyses were marked for sampling based on geological intervals with individual samples 1.5 m or less in length. Drill core was cut lengthwise in half with a core saw; half-core was sent for assays reported in this news release, and the other half is stored on site for reference. Bulk density was determined on site for the entire length of each sample assayed by measurement of mass in air and mass in water. Sample duplicate bulk density determinations and in-house bulk density standard determinations were each made at a rate of 5%. Since 2017, four in-house bulk density standards (mineralized drill core from the Tom deposit that span a range of densities) have been used and show an acceptable long-term precision. Certified standard masses are used to calibrate the scale balance used for bulk density determinations. 

A total of 5% assay standards or blanks and 5% core duplicates are included in the sample stream as a quality control measure and are reviewed after analyses are received. Standards and blanks in 2021 drill results to date have been approved as acceptable. Duplicate data add to the long-term estimates of precision for assay data on the project and precision for drill results reported is deemed to be within acceptable levels. Samples were sent to the Bureau Veritas preparation laboratory in Whitehorse, Yukon, where the samples were crushed and a 500 g split was sent to the Bureau Veritas laboratory in Vancouver, B.C to be pulverized to 85% passing 200 mesh size pulps. Clean crush material was passed through the crusher and clean silica was pulverized between each sample. The pulps were analyzed by 1:1:1 Aqua Regia digestion followed by Inductively Coupled Plasma Mass Spectrometry (ICP-ES/ICP-MS) multi-element analyses (BV Code AQ270). All samples were also analyzed for multiple elements by lithium borate fusion and X-ray fluorescence analysis (XRF) finish (BV Code LF725). Over-limit Pb (>25.0%) and Zn (>24.0%) were analyzed by lithium borate fusion with XRF finish (BV Code LF726). Silver and copper are reported in this news release by method AQ270, and zinc and lead are reported by LF725 or LF726. Bureau Veritas (Vancouver) is an independent, international ISO/IEC 17025:2005 accredited laboratory. 

Results in this news release are length and bulk-density weighted averages as would be used in a Mineral Resource estimate. Readers are cautioned that in Fireweed news releases prior to 2020, only length weighted assay averages were reported which may result in slightly lower (under-reported) average values. Length and bulk-density weighted averages have been reported as these most accurately represent the average metal-content of the intersections. 

Qualified Person Statement

Technical information in this news release has been approved by Jack Milton, P.Geo., Ph.D., Chief Geologist and a ‘Qualified Person’ as defined under Canadian National Instrument 43-101.

About Fireweed Zinc Ltd. (TSXV: FWZ): Fireweed Zinc is a public mineral exploration company focused on zinc-lead-silver and managed by a veteran team of mining industry professionals. The Company is advancing its district-scale 940 km2 Macmillan Pass Project in Yukon, Canada, which is host to the 100% owned Tom and Jason zinc-lead-silver deposits with current Mineral Resources and a PEA economic study (see Fireweed news releases dated January 10, 2018, and May 23, 2018, respectively, and reports filed on for details) as well as the Boundary Zone, Tom North Zone and End Zone which have significant zinc-lead-silver mineralization drilled but not yet classified as mineral resources. The project also includes large blocks of adjacent claims (MAC, MC, MP, Jerry, BR, NS, Oro, Sol, Ben, and Stump) which cover exploration targets in the district where previous and recent work identified zinc, lead and silver prospects, and geophysical and geochemical anomalies in prospective host geology.

Additional information about Fireweed Zinc and its Macmillan Pass Zinc Project including maps and drill sections can be found on the Company’s website at and at


Brandon Macdonald

CEO & Director

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Cautionary Statements

This news release may contain “forward-looking” statements and information relating to the Company and the Macmillan Pass Project that are based on the beliefs of Company management, as well as assumptions made by and information currently available to Company management. Such statements reflect the current risks, uncertainties and assumptions related to certain factors including but not limited to, without limitations, exploration and development risks, expenditure and financing requirements, general economic conditions, changes in financial markets, pandemics, the ability to properly and efficiently staff the Company’s operations, the sufficiency of working capital and funding for continued operations, title matters, First Nations relations, operating hazards, political and economic factors, competitive factors, metal prices, relationships with vendors and strategic partners, governmental regulations and oversight, permitting, seasonality and weather, technological change, industry practices, and one-time events. Additional risks are set out in the Company’s prospectus dated May 9, 2017, and filed under the Company’s profile on SEDAR at Should any one or more risks or uncertainties materialize or change, or should any underlying assumptions prove incorrect, actual results and forward-looking statements may vary materially from those described herein. The Company does not undertake to update forward‐looking statements or forward‐looking information, except as required by law.

Boundary Zone section A-A'

Table 2: 2021 drill hole results and observations.

Drill Hole Length (m) Zone Target Results and Observations 
NB21-001 277.0Boundary West BZW down-dip extensionAssay results reported 17th August 2021.
NB21-002 439.0Boundary West BZW down-dip extension Assay results reported 16th September 2021.
NB21-003 189.0Boundary West BZW step-out to westAssays pending.
NB21-004 382.7 Boundary West BZW step-out to westAssays pending. 
TS21-001 402.7Tom EastTom East infillWide zone encountered. Assays pending. 
TS21-002 46.0Tom EastTom East step-outHole ended early due to drilling problems and redrilled as TS21-003.
TS21-003 401.5 Tom EastTom East step-out No mineralization encountered.
NB21-005481.7Boundary MainBZ down-dip extensionResults reported in this release. 
NB21-006157.2Boundary WestBZW step-out to eastNarrow zone encountered. Assays pending. 
NB21-007106.7Boundary WestBZW step-out to eastNarrow zone encountered. Assays pending.
NB21-008325.8Boundary WestBZW step-out to eastWide zone encountered. Assays pending. 
NB21-009445.6Boundary WestBZW down-dip extensionWide zone encountered. Assays pending.
NB21-010190.5Boundary MainBZ step-out to westModerate zone encountered. Assays pending.

Table 3: 2021 drill collar details

Drill Hole Length (m) Zone Easting* Northing* Elevation (m) Dip (°) Grid Azimuth (°) 
NB21-001 277.0Boundary West 42205270106141217-65211
NB21-002 439.0 Boundary West 42205370106141218-75212
NB21-003 189.0 Boundary West 42193270106441226-50204
NB21-004 382.7Boundary West 42193270106441226-75204
TS21-001 402.7Tom East44206470043221679-82060
TS21-002 46.0Tom East 44219770044281688-89236
TS21-003 401.5Tom East 44219770044311688-89236
NB21-005481.7Boundary Main42239770105501203-75211
NB21-006157.2Boundary West42209370105161189-50211
NB21-007106.7Boundary West42209470105181189-70211
NB21-008325.8Boundary West42209470105181189-75211
NB21-009445.6Boundary West42212870106321223-68211
NB21-010190.5Boundary Main42219970104001159-75211

*UTM Zone 9 NAD83. Final RTK GPS surveyed.

Brandon MacDonald
Phone: (604) 646-8361