FIREWEED METALS CORP. (TSX-V: FWZ) (OTCQB: FWEDF) (formerly Fireweed Zinc Ltd.) is pleased to announce additional results from the 2022 drill program at Boundary West, Macmillan Pass, Yukon, Canada (Map 1).
Brandon Macdonald, CEO, stated “These results from the 2022 Boundary West drilling program include several significant step-outs and demonstrate that the massive sulphide zone carries good grade and continuity. We hit another intersection in the Howard’s Pass style mineralization in older rock units for which we see further potential across the property. Results are pending from many of the 2022 drillholes that intersected wide intervals of intense sphalerite-galena mineralization at Boundary Main and the Tom deposit.”
Boundary West Drilling Results
The following drill results are from three drill holes located at Boundary West (Maps 1 and 2). The results from many other holes from the 2022 drill program are pending, including 12 holes from Boundary Main, 8 holes from Tom West and 1 hole from Tom East.
At depth, this hole intersected a zone of stratiform zinc-lead-silver mineralization over 28 m grading 2.6% zinc, 1.5% lead, and 26.5 g/t silver (Table 1, Cross Section D-D’). Preliminary geological interpretations correlate this layer with the stratiform zinc-lead-silver mineralization previously discovered at Boundary West, representing an approximately 115 m step-out. A thin (0.65 m) intersection of high-grade sphalerite veining returned 28.5% zinc within a sequence of conglomerates, similar in style to Boundary Main (Table 1). This hole was targeting a step-out from the very high grade and wide intersection of massive sulphide in hole NB22-002 (reported in Fireweed News Release dated Nov 22, 2022) but had to be abandoned short of the target due to excessive drillhole deviation and the step-out target remains untested.
This hole intersected 4 m of semi-massive sulphide mineralization grading 5.2% zinc and 11 g/t silver within silicified and siderite-altered lapilli tuffs (Table 1), representing a ~30 m step-out up-dip from the newly discovered zone reported in NB22-002 (Fireweed news release dated Nov 22, 2022). This hole also intersected a zone of massive sulphide over 7.3 m grading 10.7% zinc, 1.7% lead, and 75.1 g/t silver including 3.8 m of 15.5% zinc, 1.8% lead, and 94.9 g/t silver (Table 1, Cross Section D-D’). The massive sulphides are hosted in a sequence of silicified black mudstone and barite that ends abruptly against a fault and are interpreted as a faulted block, representing an incomplete section through the Boundary West massive sulphides, stepping out ~35 m from the same zone in NB21-001.
This hole provided an infill intersection of 56.5 m of 6.3% zinc, 0.4% lead, and 36.4 g/t silver within the massive sulphide zone at Boundary West including two distinct high-grade zones: 11.6 m of 10.9% zinc, 0.3% lead, and 43.5 g/t silver; and 13 m of 9.6% zinc, 0.7% lead and 48.2 g/t silver (Table 1). This hole also provided a step-out of the Howard Pass style mineralization intersecting 15.6 m of 2.6% zinc including two 3.1 m intersections of 5.4% zinc and 4.6% zinc, respectively (Table 1). This is a ~50 m step-out from similar mineralization in NB20-009 (see Fireweed news release dated February 25, 2021).
Most zinc mineralization at Macmillan Pass is hosted in Devonian age rocks, however, in 2020, Fireweed drilled a hole that resulted in the discovery of zinc mineralization hosted in older Ordovician-Silurian rocks and termed this “Howard’s Pass style” mineralization owing to similar age host rocks at the large Howard’s Pass zinc-lead deposits that are located approximately 60 kilometers away from Boundary Zone. This was the first discovery of zinc mineralization in these older rocks at Macmillan Pass. Note the Howard’s Pass deposits are not owned by Fireweed and a comparison of these similar geological settings is for information purposes only and does not imply that similar potential quantities or grades will be delineated at Macmillan Pass. The Howard’s Pass style mineralization at Macmillan Pass is at an early stage of exploration and remains to be tested with additional drilling.
Table 1: NB22-004, NB22-007 and NB22-019 drill results.
*Intersected thicknesses, not true thicknesses, are stated for all intersections in Table 1. Due to the early-stage of drilling, true thicknesses cannot be accurately stated for these holes, but are estimated relative to intersected thickness at 10-40% for NB22-004, and 50-75% for NB22-007 and NB22-019 based on angles of bedding to core axis.
Note – an interval of core in NB22-007 from 100.72 m to 131.62 m was not assayed as these core intervals were lost to a windstorm that up-ended several core tables, spilling the core on the ground prior to logging and sampling.
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 HQ3 (split tube) size core (61.1 mm / 2.406 inch diameter) with recoveries typically above 85% unless otherwise noted in the table of results. After drilling, core was cleaned, scanned with a core scanning machine, 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 2 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 2022 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 is 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 Fireweed Metals Chief Geologist, Jack Milton, Ph.D., P.Geo (BC), and a ‘Qualified Person’ as defined under Canadian National Instrument 43-101.
About Fireweed Metals Corp.
Fireweed Metals is a public mineral exploration company on the leading edge of Critical Minerals project development. Fireweed is well-funded, with a current cash position of C$38,600,000, and is well-positioned to carry out a large 2023 exploration program. The Company has three projects located in Canada:
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