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Fireweed Intersects 4.76% Zinc, 0.43% Lead and 18.9 g/t Silver over 43.7 m in upper sequence and 2.08% Zinc over 225 m in lower sequence at Boundary West

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FIREWEED ZINC LTD. (TSX-V: FWZ) is pleased to announce the final results from the 2020 drilling at Boundary Zone, Macmillan Pass Project in Yukon, Canada. These results are from Boundary Zone West which was discovered in 2020 with a 360 metre step out hole drilled on a gravity anomaly. It is located 15 road kilometres west of the Tom-Jason deposits (see Map 1) and includes discovery of a new lower sequence hosted in older host rocks than other mineralization found at Macmillan Pass. Boundary Zone has now been traced over a strike length of 630 metres, and both upper and lower sequence mineralization remains open for expansion along strike and down dip.

 

Highlights

 

  • Hole NB20-009 intersected a dense upper sequence of 4.76% zinc, 0.43% lead and 18.9 g/t silver over 43.7 m including a high grade stratiform zone of 26.35% zinc, 5.21% lead and 53.4 g/t silver over 2.19 m from a vertical depth of 40 m from surface.
  • Hole NB20-009 also intersected a broad lower sequence of 2.08% zinc over 225.0 m including a stratiform zone of 3.69% zinc over 19.0 m and a vein interval of 3.75% zinc over 50.00 m.
  • This is the first discovery of zinc mineralization hosted by lower sequence Ordovician-Silurian rocks in the district.
  • Hole NB20-008 intersected the upper sequence of vein mineralization of 2.48% zinc, 0.74% lead, and 12.5 g/t silver over 111.17 m including two higher grade vein intervals of 6.07% zinc, 1.12% lead, and 27.8 g/t silver over 13.95 m and 4.57% zinc, 0.62% lead, and 15.2 g/t silver over 17.0 m

 

 

Table 1: Highlight results from the upper and lower sequences at Boundary Zone West.

 

Drill Hole From
(m)
To
(m)
Intersection
(m)
Zinc
(%)
Lead
(%)
Silver
(g/t)
Bulk
Density
(t/m3)
Zone
NB20-008 194.83 306.00 111.17 2.48 0.74 12.5 3.37 Upp.V
> including 198.05 212.00 13.95 6.07 1.12 27.8 3.85 Upp.V
> and 242.35 259.38 17.03 4.57 0.62 15.2 3.53 Upp.V
NB20-009 40.30 84.00 43.70 4.76 0.43 18.9 3.64 Upp.
> including 40.30 42.49 2.19 26.35 5.21 53.4 3.85 Upp.T/J
>> including 41.40 42.49 1.09 44.80 8.33 77.6 3.81 Upp.T/J
NB20-009 181.00 406.00 225.00 2.08 0.09 5.3 2.97 Low.
> including 181.00 212.00 31.00 2.99 0.03 5.2 2.93 Low.HP
>> including 183.00 202.00 19.00 3.69 0.04 5.9 3.26 Low.HP
>>> including 183.00 188.00 5.00 9.69 0.06 10.4 2.98 Low.HP
> and 283.50 406.00 122.50 2.59 0.13 6.4 3.02 Low.V
>> including 283.50 385.00 101.50 2.84 0.15 7.1 3.06 Low.V
>>> including 315.00 365.00 50.00 3.75 0.12 5.6 3.08 Low.V

Upp. = Upper Sequence; Low. = Lower Sequence; V = Vein mineralization; T/J = Tom/Jason style stratiform laminated mineralization; HP = Howard’s Pass style stratiform zinc mineralization.
Averages are length and bulk density weighted.

CEO Statement

 

Brandon Macdonald, CEO, stated “These first few holes into the new Boundary West discovery have shown the near-surface upper sequence to have significant widths and grade, not just in the newly discovered massive sulphide zone, but also within the barite-hosted stratiform mineralization which in NB20-009 has shown grade potential rivalling the best of Tom & Jason. The lower sequence at Boundary West shows similar grades to parts of central Boundary Zone over a 225 m intersection and the discovery of mineralization in these older rocks hugely expands the exploration space for new discoveries across the whole 940 km2 property. These initial intersections point to two distinct stratiform mineralized systems at Boundary West that are each underlain by significant thicknesses of vein mineralization. Boundary West remains open along strike and down dip, and may have continuity to central Boundary Zone to the east. This suggests a massive size potential and a staggering metal endowment.”

 

NB20-009 and NB20-007 Drill Results

 

These assays complete the results for Fireweed’s new 2020 discovery, Boundary Zone West, approximately 360 m west of the central area of the known Boundary Zone mineralized system. Drill hole NB20-009 was drilled on-section southwest of NB20-004 (Map 2), both targeting a ground-gravity high anomaly surveyed earlier in the season. Both drill holes intersected an upper sequence comprising massive sulphides, Boundary Zone-style vein-hosted and replacement-style mineralization, and stratiform, laminar zinc-lead-silver mineralization similar to that seen at Tom and Jason. NB20-009 also intersected a lower sequence of stratiform, laminar zinc mineralization in older host rocks which were previously not believed to host mineralization in the Macmillan Pass district (Section 1). This lower sequence is hosted in Late Ordovician-Early Silurian host rocks the same age as host rocks at Howard’s Pass, 90 km to the southeast. Its discovery has significant implications for exploration and dramatically increases the area of prospective host rocks in the district. Hole NB20-007 encountered drilling problems at 90 m depth and was re-drilled from the same pad, as NB20-009, intersecting similar geology in the first 90 m.

 

NB20-008 Drill Results

 

Hole NB20-008 was drilled as a step-out hole 85 m west of pre-2020 drilling, between the previously known core of mineralization at Boundary Zone and Boundary Zone West. Like NB20-004 and NB20-009, NB20-008 targeted a ground gravity high anomaly. Sulphide mineralization included breccia and vein-hosted, and replacement-style mineralization similar to mineralization seen in the core of the Boundary Zone system.

 

The true thickness of the stratiform mineralization cannot be accurately estimated yet owing to the variable orientation of nearby oriented core bedding measurements and sparsity of drill holes. The true thickness of the stratiform mineralization in holes NB20-009 and NB20-007 is estimated to be between 20% to 80% of intersected thicknesses. True widths of individual cm- to m-scale veins intersected in NB20-007, NB20-008 and NB20-009 vary greatly from 20% to 95% of intersected thicknesses reflecting the stockwork nature of the veins, and at this early stage of drilling the overall true thickness of Boundary Zone West cannot be accurately estimated until further drilling is completed.

 

Boundary Zone Potential

 

There is no Mineral Resource for Boundary Zone yet and the zone is not included in the current mineral resource estimate for the property (described in Fireweed news release dated January 10, 2018). Boundary Zone has potential to be mined in an open pit with a low strip ratio and to be upgraded through low cost, pre-concentration ore sorting processes (see Fireweed news release dated July 31, 2019). Recent drill results at Boundary Zone along with Tom North Zone and End Zone (see Fireweed news releases dated August 20th and September 10th, 2019; November 15th and 29th, 2018; January 26th, 2021) represent potential for expansion of the large current mineral resources on the property and improvement of Macmillan Pass project economics described in the current Preliminary Economic Assessment (PEA) (see Fireweed news release dated May 23rd, 2018).

 

Boundary Zone Background

 

Boundary Zone mineralization consists of sphalerite-siderite-pyrite and minor galena in veins, stockworks, disseminations, and as replacement of matrix and clasts within coarse clastic rocks. Drilling in 2020 at Boundary Zone West also identified stratiform mineralization similar to the Tom and Jason deposits (see news release dated November 24th, 2020).

 

Historical exploration work at Boundary Zone included geochemical and geophysical surveys as well as 24 drill holes that defined a central 200 x 800 m mineralized zone of zinc (-lead-silver) mineralization within a broader system over 2 km in strike length. Historical length-weighted average intersections1 such as 224.0 m of 2.50% zinc and 0.30% lead, including 4.5 m of 16.40% zinc, are consistent with recent Fireweed drilling and demonstrated potential for bulk tonnage open pit mineralization.

 

In 2019, Fireweed drilled two holes into the central part of the known Boundary Zone mineralization. Both holes intersected wide zones of high-grade replacement-style and vein- and breccia-hosted zinc mineralization, including 100.0 m (true width) of 8.73% zinc from surface including 6.4 m of 43.53% zinc within 230.0 m of 4.51% zinc (see Fireweed news releases dated November 5th, 2019 and January 26th, 2021). In 2020 Fireweed drilled the discovery holes into the Boundary West Zone described in this news release.

 

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%. After drilling, core was logged for geology, structure and geotechnical characteristics, 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 from the Boundary Zone 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 2020 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 in prior years, 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 Gilles Dessureau, P.Geo, Vice President Exploration and a ‘Qualified Person’ as defined under Canadian National Instrument 43-101.

 

About Fireweed Zinc Ltd.

 

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 www.sedar.com 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.

 

 

Photos accompanying this announcement are available at

 

https://www.globenewswire.com/NewsRoom/AttachmentNg/b330122c-f124-4af8-8414-1255c6b6e102

 

https://www.globenewswire.com/NewsRoom/AttachmentNg/84ad7030-e9ec-493e-83c0-38b68e29fa31

 

https://www.globenewswire.com/NewsRoom/AttachmentNg/10ec7d84-6f70-43ec-8885-cc87e1a035e1

 

 

Table 2: Full results from NB20-007.

 

Hole From
(m)
To
(m)
Intersection
(m)
Zinc
(%)
Lead
(%)
Silver
(g/t)
Bulk
Density
(t/m3)
Zone
NB20-007 37.00 72.00 35.00 3.90 0.30 14.6 3.20 Upp.
> including 37.00 53.00 16.00 6.96 0.54 20.7 3.30 Upp.
>> including 37.00 46.55 9.55 9.74 0.81 27.0 3.47 Upp.
>>> including 37.00 38.68 1.68 26.13 3.36 36.8 3.39 Upp.T/J
>>> and 43.60 46.55 2.95 12.94 0.41 47.3 4.26 Upp.V
>> and 51.00 53.00 2.00 6.14 0.09 14.4 3.07 Upp.V

Upp. = Upper Sequence.
V = Vein mineralization.
T/J = Tom/Jason style stratiform laminated mineralization.
Averages are length and bulk density weighted.

 

 

Table 3: Full results from NB20-008.

 

Hole From
(m)
To
(m)
Intersection
(m)
Zinc
(%)
Lead
(%)
Silver
(g/t)
Bulk
Density
(t/m3)
Zone
NB20-008 27.00 27.89 0.89 5.76 0.02 6.9 3.37 Vein
NB20-008 70.00 72.00 2.00 2.68 0.41 6.2 2.61 Vein
NB20-008 90.00 114.00 24.00 2.10 0.18 5.9 2.75 Vein
> including 100.00 114.00 14.00 3.08 0.30 8.8 2.78 Vein
>> including 108.00 110.09 2.09 11.33 0.02 15.3 2.93 Vein
NB20-008 148.00 149.50 1.50 3.76 0.09 4.1 2.81 Vein
NB20-008 194.83 306.00 111.17 2.48 0.74 12.5 3.37 Upp.V
> including 198.05 212.00 13.95 6.07 1.12 27.8 3.85 Upp.V
>> including 204.00 212.00 8.00 7.95 1.10 29.5 3.6575 Upp.V
> and 235.00 240.00 5.00 1.46 0.81 8.4 3.41 Upp.V
> and 242.35 259.38 17.03 4.57 0.62 15.2 3.53 Upp.V
> and 289.00 290.00 1.00 9.77 0.76 19.7 3.38 Upp.V

Upp. = Upper Sequence.
V = Vein mineralization.
Averages are length and bulk density weighted.

 

 

Table 4: Full results from NB20-009.

 

Hole From
(m)
To
(m)
Intersection
(m)
Zinc
(%)
Lead
(%)
Silver
(g/t)
Bulk
Density
(t/m3)
Zone
NB20-009 40.30 84.00 43.70 4.76 0.43 18.9 3.64 Upp.
> including 40.30 69.85 29.55 5.66 0.58 21.6 3.71 Upp.
>> including 40.30 42.49 2.19 26.35 5.21 53.4 3.85 Upp.T/J
>>> including 41.40 42.49 1.09 44.80 8.33 77.6 3.81 Upp.T/J
>> and 46.26 51.00 4.74 7.87 0.35 33.3 4.33 Upp.V
NB20-009 164.00 167.00 3.00 2.85 0.04 7.2 3.22 Vein
NB20-009 181.00 406.00 225.00 2.08 0.09 5.3 2.97 Low.
> including 181.00 212.00 31.00 2.99 0.03 5.2 2.93 Low.HP
>> including 183.00 202.00 19.00 3.69 0.04 5.9 3.26 Low.HP
>>> including 183.00 188.00 5.00 9.69 0.06 10.4 2.98 Low.HP
>>>> including 183.00 185.00 2.00 14.47 0.06 12.6 3.06 Low.HP
>>>> and 186.00 188.00 2.00 8.98 0.07 11.8 3.00 Low.HP
>>> and 195.00 197.00 2.00 5.87 0.02 6.8 2.79 Low.HP
> and 283.50 406.00 122.50 2.59 0.13 6.4 3.02 Low.V
>>including 283.50 385.00 101.50 2.84 0.15 7.1 3.06 Low.V
>>> including 296.32 298.71 2.39 7.23 0.16 19.1 3.93 Low.V
>> and 315.00 365.00 50.00 3.75 0.12 5.6 3.08 Low.V
>>> including 315.00 316.00 1.00 14.50 0.22 15.3 3.60 Low.V
>>> and 329.70 334.05 4.35 6.54 0.24 9.2 3.26 Low.V
>>> and 341.00 342.00 1.00 15.08 0.38 12.3 3.67 Low.V
>>> and 350.00 351.00 1.00 17.29 0.04 6.3 3.26 Low.V
>>> and 355.00 356.00 1.00 11.73 0.02 5.1 3.27 Low.V
>>> and 360.00 365.00 5.00 5.42 0.04 9.0 2.96 Low.V
>> and 397.13 406.00 8.87 2.48 0.02 2.5 2.94 Low.V

 

Upp. = Upper Sequence; Low. = Lower Sequence.
V = Vein mineralization.
T/J = Tom/Jason style stratiform laminated mineralization.
HP = Howard’s Pass style stratiform zinc mineralization.
Averages are length and bulk density weighted.

 

 

Table 5: 2020 drill hole collar data.

 

Diamond Drill Hole Collars

 

Drill Hole Length (m) Zone Easting* Northing* Elevation (m) Dip (°) Grid Azimuth (°)
NB20-001 303.5 Boundary Zone 422440 7010418 1164 -54 270
NB20-002 320.0 Boundary Zone 422336 7010329 1132 -50 020
NB20-003 152.0 Boundary Zone 421557 7010456 1200 -50 185
NB20-004 333.0 Boundary Zone 422049 7010614 1218 -50 215
NB20-005 143.0 Boundary Zone 422277 7010313 1129 -50 215
NB20-006 203.0 Boundary Zone 422277 7010313 1129 -80 215
NB20-007 90.0 Boundary Zone 421951 7010538 1200 -70 215
NB20-008 324.0 Boundary Zone 422216 7010354 1139 -50 215
NB20-009 447.2 Boundary Zone 421951 7010538 1200 -75 215
MP20-001 632.0 240 Mile 438698 7003094 1311 -60 295

*UTM Zone 9 NAD83

 

 

Reverse Circulation (RC) Drill Hole Collars

 

Drill Hole Length (m) Zone Easting* Northing* Elevation (m) Dip (°) Grid Azimuth (°)
TRC20-001 7.6 Tom West 442065 7003667 1547 -50 066
TRC20-002 82.3 Tom West 442071 7003663 1547 -80 066
TRC20-003 64.0 Tom West 442071 7003663 1547 -55 066
TRC20-004 64.0 Tom West 442071 7003663 1547 -70 089
TRC20-005 47.2 Tom West 442071 7003663 1547 -55 129
TRC20-006 36.6 Tom West 442049 7003678 1545 -80 065
TRC20-007 98.45 Tom North 441654 7004507 1422 -51 076
JRC20-001 47.24 Jason Main 436437 7002774 1298 -50 027
JRC20-002 59.44 Jason Main 436533 7002772 1300 -65 011

*UTM Zone 9 NAD83

 

 

Table 6: 2020 drill hole results and observations.

 

Diamond Drill Hole Descriptions

 

Drill Hole Length (m) Zone Target Results and Observations
NB20-001 303.5 Boundary Zone BZ core infill Wide zone encountered. Results reported in prior news release.
NB20-002 320.0 Boundary Zone BZ core infill/step-out Wide zone encountered. Hole abandoned at 320 m in mineralization due to drilling problems. Results reported in prior news release.
NB20-003 152.0 Boundary Zone Gravity high anomaly ~800 m west of BZ No significant mineralization. Gravity anomaly explained by dense sedimentary rock unit
NB20-004 333.0 Boundary Zone Gravity high anomaly 360 m west of BZ Wide zone encountered. Reported in prior news release.
NB20-005 143.0 Boundary Zone BZ step-out to south No significant mineralization.
NB20-006 203.0 Boundary Zone BZ step-out to south Minor mineralization encountered.
NB20-007 90.0 Boundary Zone Gravity high 360 m W of BZ Hole abandoned due to drilling problems and re-drilled as NB20-009. Reported in this news release.
NB20-008 324.0 Boundary Zone Gravity high anomaly 200 m west of BZ and step-out 80 m west of previous drilling Wide zone encountered. Reported in this news release.
NB20-009 447.2 Boundary Zone Gravity high anomaly 360 m W of BZ Wide zone encountered. Reported in this news release.
MP20-001 632.0 240 Mile Target Gravity high anomaly between the Tom and Jason deposits Hole suspended before reaching target horizon; casing left in place to allow resumption of drilling next season.

 

 

Reverse Circulation (RC) Drill Hole Descriptions – assays pending.

 

Drill Hole Length (m) Zone Target Results and Observations
TRC20-001 7.6 Tom West Infill Hole abandoned at casing due to drilling problems
TRC20-002 82.3 Tom West Infill Tom West zone intersected. Assays pending.
TRC20-003 64.0 Tom West Infill Tom West zone intersected. Assays pending.
TRC20-004 64.0 Tom West Twin of historic hole Successful twin with good recovery. Assays pending.
TRC20-005 47.2 Tom West Step-out Hole abandoned before target depth due to drilling problems
TRC20-006 36.6 Tom West Infill Hole abandoned before target depth due to drilling problems
TRC20-007 98.45 Tom North Infill Tom North zone intersected. Assays pending.
JRC20-001 47.24 Jason Main Infill Jason Main zone intersected. Assays pending.
JRC20-002 59.44 Jason Main Infill Jason Main zone intersected. Hole abandoned in mineralization. Assays pending.

 

Posted February 25, 2021

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