FIREWEED ZINC LTD. (TSX-V: FWZ) is pleased to announce assays from the first five drill holes in the Tom North open pit target and a step out hole at Tom West at the Macmillan Pass Project in Yukon, Canada. Drilling has now finished on the property and additional assays from multiple zones are pending.
Table 1: Initial 2019 drilling results from Tom North and Tom West
|Zinc (%)||Lead (%)||Silver (g/t)|
Brandon Macdonald, CEO, stated, “We are pleased with the results from the first 2019 drill assays. So far Tom North is showing potential open-pit results and it is noteworthy that holes TS19-005 and TS19-006 reported much higher grades over wider intervals than the 1952 hole they twinned due to better recoveries using modern drilling techniques. With these positive first drill assays now in, we look forward to release of drill results from other zones tested this summer to expand on our current resources, which are already among the largest undeveloped zinc resources in the world, as well as the field program of geophysics, geochemistry and mapping still ongoing.”
Historic trenching and very shallow, low-recovery drilling in 1952 indicated the presence of near-surface mineralization at Tom North. The first drill holes of the 2019 season have confirmed that mineralization extends to depth, and the results define a near-surface zone of zinc-lead mineralization that is potentially amenable to open-pit mining. The Tom North exploration target has mineralization demonstrated over a strike length of at least 500 metres, a true thickness between 6 and 23 metres (average of 12 metres), with the down-dip extent tested to 190 metres, and is open to depth (Figures 1-3). The average bulk density of the mineralized rock is 2.86 t/m3. The mineralization is stratiform and comprises laminated fine-grained sphalerite-galena-pyrite-barite. Tom North is a distinct zone separated from the Tom West zone by faulting (Figure 2).
No mineral resource has been estimated for Tom North and the zone is not included in the current mineral resource estimate for the property (described in Fireweed news release dated January 10, 2018). Tom North represents potential for a significant expansion to the Tom mineral resources, to extend open pit and underground mine life, and to improve project economics described in the current Preliminary Economic Assessment (PEA) (see Fireweed news release dated May 23, 2018). The current PEA includes a three year open-pit mine life at Tom West over the course of an overall 18 year mine life.
Drill holes TS19-005 and TS19-006 effectively twinned a historic 1952 drill hole and both returned significantly higher grades and thicknesses than the historic twin hole, owing to better recoveries using modern drilling methods. TS19-006 was drilled below TS19-005 to improve on core recoveries and obtain a slightly deeper cut of the zone. Two additional twin holes have been drilled in Tom North, and assays are pending.
A step-out hole at Tom West, TS19-004, extends the mineralization to the south. Mineralization in the hole was cut off by a fault, limiting the width of the drilled intersection (Figure 2). Structural information gathered from the hole will be used to inform further exploration in this area.
The 2019 drill program is now complete. A total of 16 diamond drill holes have been drilled for a total of 2,357 metres. Targets tested were Tom North, Tom East, Tom West, Jason North, Target A, Target G, Target R, and Boundary Zone (Tables 2 & 3, and Figure 4). Assays are pending for all holes not included in this release and summary descriptions of field results and observations are provided in Table 3.
Notes on sampling and assaying:
The drill core logging and sampling program is 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 is logged for geology, structure and geotechnical characteristics, marked for sampling, and photographed on site. The cores for analyses are marked for sampling based on geological intervals with individual samples 1.5 metres or less in length. Drill core is cut lengthwise in half with a core saw; half-core is sent for assay, the other half is stored on site for reference. A total of 5% assay standards and 5% blanks are inserted into every sample shipment as a quality control measure and reviewed, after analyses are received. Standards and blanks in shipments to date have been approved as acceptable. Samples are sent to the Bureau Veritas (formerly Acme Labs) preparation laboratory in Whitehorse, Yukon, where the samples are crushed and a 500 g split is pulverized to 85% passing 200 mesh size pulps. Clean crush material is passed through the crusher and clean silica is pulverized between each sample. The pulps are then sent to the Bureau Veritas laboratory in Vancouver, B.C. and 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 are 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.
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 and managed by a veteran team of mining industry professionals. The Company is advancing its district-scale 544 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 Tom North Zone, Boundary Zone and End Zone which have significant zinc-lead-silver mineralization drilled but not yet classified as mineral resources. The project also includes option agreements on large blocks of adjacent claims (MAC, MC, MP, Jerry, BR and NS) 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.
TABLE 2: 2019 DRILL HOLE COLLAR DATA
|Hole ID||Length (m)||Target||Easting||Northing||Elevation (m)||Dip (°)||Grid Azimuth (°)|
|UTM Zone 9 NAD83|
TABLE 3: 2019 DRILL HOLE RESULTS AND OBSERVATIONS
|Hole No.||Zone||Drill Target||Results and Observations|
|TS19-001||Tom North||Step out hole at depth in Tom North||Assays reported in this news release.|
|TS19-002||Tom North||Step out hole at depth in Tom North||Assays reported in this news release.|
|TS19-003||Tom North||Step out hole at depth in Tom North||Assays reported in this news release.|
|TS19-004||Tom West||Step out hole at south end of Tom West Zone||Assays reported in this news release.|
|TS19-005||Tom North||Twin hole to confirm 1952 drill results||Assays reported in this news release.|
|TS19-006||Tom North||Drilled below TS19-005 for better core recoveries||Assays reported in this news release.|
|TS19-007||Tom East||Step out hole down dip in Tom East||Zone intersected but due to drill hole deviation this ended up being a Tom East infill hole. Assays pending.|
|TS19-008||Tom North||Twin hole to confirm 1952 drill results||Zone intersected. Assays pending.|
|TS19-009||Tom North||Twin hole to confirm 1952 drill results||Zone intersected. Assays pending.|
|TS19-010||Target R||Geophysical anomaly||No significant intersection. Anomaly explained by pyrite and dense sedimentary rock unit.|
|JS19-001||Jason North||Coincident geological-geophysical-geochemical anomaly||Minor mineralization intersected. Target will be re-evaluated this winter.|
|JS19-002||Jason North||Coincident geological-geophysical-geochemical anomaly||Minor mineralization intersected. Target will be re-evaluated this winter.|
|MP19-001||Target A||Geophysical anomaly||No significant intersection. Anomaly explained by dense sedimentary rock unit.|
|MP19-002||Target G||Drilling below zinc-lead mineralization found on surface||Narrow zone intersected. Assays pending.|
|NB19-001||Boundary Zone||Infill hole to confirm historic drill results and collect large sample for metallurgical-ore sorting test work.||Wide zone intersected. Core being logged and sampled. Assays pending.|
|NB19-002||Boundary Zone||Infill hole to confirm historic drill results and collect large sample for metallurgical-ore sorting test work.||Wide zone intersected. Core being logged and sampled. Assays pending.|
Photos accompanying this announcement are available at:
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