Trilogy Announces Additional Results from the 2021 Infill Drill Program at the Arctic Project and Update on the Ambler Access Project
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News Release
Trilogy Announces Additional Results from the 2021 Infill Drill
Program at the Arctic Project and Update on the Ambler Access
Project
March 1 7, 2022 – Vancouver, British Columbia – Trilogy Metals Inc. (TSX, NYSE
American: TMQ) (“Trilogy” or the “Company”) is pleased to announce the fourth set of drilling
results from the 2021 summer field season at the Arctic Project , part of the Upper Kobuk
Mineral Projects (“UKMP”) located in Northwestern Alaska managed by Ambler Metals LLC
(“Ambler Metals”), the joint venture operating company equally owned by wholly owned
subsidiaries of Trilogy and South32 Limited (ASX, LSE, JSE: S32; ADR: SOUHY) (“South32”).
The 2021 Arctic drill program included 4,131 meters of diamond drilling, comprising 18 holes,
that were designed to convert part of the resources from the Indicated category to the
Measured category, and provide material for metallurgical testing and geotechnical
information. The assay results detailed here are for additional infill/metallurgical drill holes
from the 2021 summer field season.
Highlights from the latest metallurgical/infill drill holes from the 2021 drill program
Based on a cut -off grade of 0.5% copper equivalent, significant zones of high -grade copper,
zinc, lead, gold, and silver mineralization were intersected, including:
• Hole AR21-0181 intersected six mineralized intervals, including
o 25.43 meters of 2.35% copper, 4.56% zinc, 1.09% lead, 0.11 g/t gold
and 20.49 g/t silver for a copper equivalent grade of 4.64%;
o 22.56 meters of 2.60% copper, 5.60% zinc, 1.19% lead, 0.81 g/t gold
and 89.15 g/t silver for a copper equivalent grade of 6.36%; and
o 13.10 meters of 4.42% copper, 7.91% zinc, 1.13% lead, 0.70 g/t gold
and 72.37 g/t silver for a copper equivalent grade of 8.79%.
• Hole AR21-0179 intersected one mineralized interval of 6.25 meters of 2.02%
copper, 3.19% zinc, 1.03% lead, 1.17 g/t gold and 41.41 g/t silver for a
copper equivalent grade of 4.64%.
• Hole AR21 -0188 intersected four mineralized intervals, including 9.45 meters of
3.00% copper, 0.91% zinc, 0.16% lead, 0.05 g/t gold and 18.90 g/t silver for
a copper equivalent grade of 3.59%.
• Hole AR21 -0177 intersected two mineralized intervals, including 5.49 meters of
0.75% copper, 0.61% zinc, 0.15% lead, 0.28 g/t gold and 9.02 g/t silver for
a copper equivalent grade of 1.28%.
All reported intervals are thought to be close to the true width and therefore represent the
actual thickness of mineralization.
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The Company is also providing an update in the progress of the Ambler Access Project (“AAP”).
On February 22, 2022, the United States Department of the Interior (“DOI”) filed a motion to
remand the Final Environmental Impact Statement (“FEIS”) and suspend the right -of-way
permits issued to the Alaska Industrial Development and Export Authority (“AIDEA”) for the
AAP. The DOI has stated that the suspension of the r oad permits will allow it to carry out
additional supplemental work on the FEI S. Please see Trilogy’s press release dated February
23, 2022 for more information.
Last week, Ambler Metals, jointly with NANA Regional Corporation (“NANA”), filed a motion
with the court requesting a two-week extension of time to file its responses to the DOI’s motion
for voluntary remand. This filing will allow Ambler Metals, NANA, the State of Alaska and
AIDEA, as intervening defendants, time to confer with the D OI and work toward finding a
workable arrangement to manage the remand process. The Company intends to provide an
update on the AAP permitting situation when it has more clarity on the scope and timing of the
proposed supplemental work.
Tony Giardini, President and CEO of Trilogy, commented, “These drilling results continue to
confirm that the Arctic Project has some of the most compelling copper grades in the mining
industry. The planned 2022 summer field season at the UKMP currently includes a 10,000-
meter drilling campaign focused on further infill drilling at Arctic and on exploring priority
prospects and other targets within our expansive land package. I also want to reaffirm our
commitment with South32 to advance the UKMP while balancing the timeline for the State of
Alaska to provide infrastructure access to the Ambler Mining District.”
Richard Gosse, Trilogy’s Vice President, Exploration stated, “ Again, as with some of the
previously announced infill holes, the drill core gives us a glimpse of the scale of this
remarkable world-class volcanogenic massive sulphide (“VMS”) deposit. Hole AR21-0181, with
polymetallic massive sulphides grading 3 % to 8% copper equivalent in six intervals with an
accumulated true thickness of about 78 metres (255 feet) over a core length of 110 metres
(360 feet), is outstanding but not unexpected. Along strike from Arctic, VMS -like prospects,
airborne EM targets and geochemical anomalies occur for over the 97-kilometre (60-mile)
Ambler Belt, most of which is held by Ambler Metals. We look forward to announcing the results
of last year’s exploration activities in the belt as well as the remaining drill results from Arctic
in the coming weeks.”
On November 22, 2021, the Company released the assay results for two geotechnical drill
holes AR21 -0173 and AR21 -0175 that intersected high -grade mineralization beyond the
currently designed pit at Arctic. Subsequently on November 29, 2021, the Company rel eased
additional drilling results from two infill/metallurgical holes drilled early in the 2021 field
season. Of note is drill hole AR21-0176 which intersected 19.91 meters of almost 12% copper
equivalent. On January 25, 2022, the Company released the resu lts for two additional
metallurgical/infill drill holes from Arctic. For more information on these drilling results, please
visit the Company’s website at https://trilogymetals.com/news-and-media/news/.
The results of the remaining eight holes are expected to be announced over the next few
weeks.
These latest drilling results from the 2021 program contain mineralized intervals consistent
with previous drilling conducted within the resource area on the property. Significant
mineralized intervals of high-grade mineralization at a cut -off of 0.5% copper equivalent are
reported in Table 1. The locations of the holes are shown in Figure 1 and Table 2.
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Of the 18 holes drilled at Arctic last summer, eight holes were for the geotechnical program .
The 10 remaining drill holes were part of the infill/metallurgical program, with three of the 10
drill holes also being used for the hydrology program.
Table 1. Drill Intercepts from the 2021 Arctic Infill Drilling Program
Notes:
• Copper equivalent (CuEq) calculations use metal prices assumptions of US$3.00/lb for copper, US$1.10/lb
for zinc, US$1.00/lb for lead, US$1,300/oz for gold, and US$18.00/oz for silver.
• Results are core intervals and not true thickness; true widths have not been determined for the above
intercepts but are believed to be representative of actual drill thicknesses.
• Significant interval defined as a minimum of 1.0-meter copper interval with average grade >0.5% CuEq.
• Cut-off grade of 0.5% CuEq.
• Internal dilution up to three meters of <0.5% CuEq.
• Intervals of <1.0 meter not reported.
• Core recovery averaged 96%.
• Minimum sample length was 0.17m, ave rage sample length was 2.4m overall and 1.7m within mineralized
zones.
• Some rounding errors may occur.
The reported intervals are based on a copper-equivalent grade of 0.5% using metal prices from
Trilogy’s 2020 Arctic feasibility study ( US$3.00/lb copper, US$1.10/lb zinc, US$1.00/lb lead,
US$1,300/oz gold, and US$18.00/oz silver) and a maximum of 3-meters internal dilution. All
drill hole intercepts are close to true width.
Table 2. Drill Hole Locations at the Arctic Project
Coordinates are in UTM Zone 4N (meters) coordinate system, NAD83 Datum.
Hole From (m) To (m) Length (m) CuEq (%) Cu (%) Zn (%) Pb (%) Ag (g/t) Au (g/t) Zone
89.80 92.25 2.45 0.63 0.08 0.85 0.30 10.35 0.07 7a
94.60 100.09 5.49 1.28 0.75 0.61 0.15 9.02 0.28 5
AR21-0179 56.48 62.73 6.25 4.64 2.02 3.19 1.03 41.41 1.17 5
113.74 121.85 8.11 3.16 1.95 1.82 0.36 32.28 0.21 5
131.67 144.77 13.10 8.79 4.42 7.91 1.13 72.37 0.70 4
147.83 150.95 3.12 6.96 3.35 5.07 1.27 78.78 0.98 4
154.95 180.38 25.43 4.64 2.35 4.56 1.09 20.49 0.11 3
187.14 193.52 6.38 6.20 2.77 7.14 0.94 43.29 0.18 2
201.30 223.86 22.56 6.36 2.60 5.60 1.19 89.15 0.81 1
89.87 102.17 12.30 1.68 0.91 0.91 0.15 16.30 0.37 5
133.20 142.65 9.45 3.59 3.00 0.91 0.16 18.90 0.05 3
219.28 226.45 7.17 2.76 1.61 2.26 0.17 16.44 0.17 2
230.29 239.16 8.87 1.39 1.02 0.46 0.07 13.32 0.10 1
AR21-0181
AR21-0188
AR21-0177
Hole East (m) North (m) Elevation (m) Azimuth Dip Length (m)
AR21-0177 613081 7453287 868 35 -70 144.2
AR21-0179 613092 7453435 872 35 -70 96.6
AR21-0181 613266 7453078 893 32 -71 229.2
AR21-0188 613427 7453158 965 35 -70 258.5
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Figure 1. Location of Drill Holes from the Arctic Infill Drilling Program
Drill holes AR21-0177, AR21-0179, and AR21-0181 which are sized PQ3 (83 mm diameter),
were designed to provided metallurgical test material as well as upgrade confidence in the
resource model.
AR21-0188 which is sized HQ3 (61 mm diameter), was designed to provided metallurgical test
material, upgrade confidence in the resource model and allo w for hydrology monitoring
instruments to be installed down hole.
Cross sections showing the drill holes AR21 -0179 and AR21-0181 can be seen in Figures 2
and 3 below.
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Figure 2. Cross Section Showing Drill Hole AR21-0179
Figure 3. Cross Section Showing Drill Hole AR21-0181
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At hole AR21-0177, mineralization within Zone 7a consists of 3% pyrite, 0.5% chalcopyrite
and 1% sphalerite. Zone 5 consists of 3 % to 40% pyrite, 0.1% to 5% chalcopyrite, 0.1% to
1% galena, and 0.1% to 7% sphalerite.
Within hole AR21-0179, mineralization in Zone 5 consists of 0.1% to 40% pyrite, 0.1% to 15%
chalcopyrite and up to 35% sphalerite.
At hole AR21-0181, mineralization within Zone 5 consists of 1 % to 12% pyrite, 1% to 20%
chalcopyrite and trace-1% pyrrhotite. Zone 4 consists of 0.1 % to 25% pyrite, 0.1% to 35%
chalcopyrite and trace-30% sphalerite. Zone 3 consists of 0.1% to 25% pyrite, 0.1% to 40%
chalcopyrite and trace-30% sphalerite with patches of trace pyrrhotite. Zone 2 consists of
0.1% to 40% pyrite, 0.1% to 35% chalcopyrite and up to 30% sphalerite. Zone 1 consists of
up to 50% pyrite, 3 % to 80% chalcopyrite and up to 40% sphalerite with patches of trace
galena.
Within hole AR21-0188, mineralization in Zone 5 consists of 0.25 % to 35% pyrite, 0.1% to
7% chalcopyrite, up to 0.5% sphalerite and patches of trace pyrrhotite. Zone 3 consists of
0.1% to 20% pyrite, up to 35% chalcopyrite and up to 1% sphalerite. Zone 2 consists of 0.1%
to 35% pyrite, up to 10% chalcopyrite, up to 20% sphalerite, patches of galena and patches
of up to 4% pyrrhotite. Zone 1 consists of 0.5% to 30% pyrite, up to 10% chalcopyrite, up to
25% sphalerite, and patches of trace pyrrhotite.
All percentages of sulphide mineralization are based off the visual estimations in the core.
Within the Arctic deposit, mineralization occurs as stratiform semi-massive sulphide to massive
sulphide beds within primarily chlorite schists and fine -grained quartz schists. T he sulphide
beds average 4 m eters in thickness but vary from less than 1 m eter up to as much as 20
meters in thickness.
QA/QC Program
The drilling program, sampling and assaying protocol, and data verification were managed by
qualified persons (QPs) employed by Ambler Metals. The diamond drill holes were completed
using PQ3 or HQ3 diameter core, and recoveries averaged 95%. Drill core was cut lengthwise
into halves using a diamond saw, with one-half used to construct composites for metallurgical
testing and one-half cut lengthwise to provide quarter core for sampling. The remainder of the
core was retained in core trays and archived at site.
Samples were collected through mineralized zones using a 0.17 m minimum length and 2.5 m
maximum length; average s ample length is 1.70 m. Weights of the drill core samples range
from 0.64 to 17.91 kg, depending on the size of core, rock type, and recovery.
Each core sample was placed into a bag with a numbered tag and quality control samples were
inserted between core samples using the same numbering sequence. Then, samples were
grouped into batches for shipping and laboratory submissions. Each batch of 20 samples
contains three quality control (QC) samples that comprise one certified reference material
(CRM), one core blank (BLK), and one core or crushed duplicate (DUP). Chain -of-custody
records are maintained for sample shipments and the custody is transferred from Ambler
Metals’ expeditor to the laboratory upon delivery.
Samples were shipped initially to ALS Minerals’ laboratory in Fairbanks, Alaska, USA, then on
to ALS Minerals’ laboratory in Hermosillo, Mexico , for sample preparation. ALS Minerals
Fairbanks and Her mosillo are satellite sample preparation facilities accredited under ALS
Minerals. After preparation at ALS Minerals Hermosillo, split pulp samples were shipped to ALS
Minerals in North Vancouver, B.C., Canada, for assaying. ALS Minerals North Vancouver is an
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independent laboratory certified under ISO 9001:2008 and accredited under ISO/IEC
17025:2005 by the Standards Council of Canada. ALS Minerals includes its own internal quality
control samples comprising certified reference materials, blanks, and pulp duplicates.
Drill core samples were weighed (WEI -21), dried if excessively wet (DRY -21), coarse jaw
crushed to 70% passing 6 mm (CRU -21), fine jaw crushed to 70% passing 2 mm (CRU -31),
riffle split to 250 g subsamples (SPL -21) and pulverized to 85% passing 75 μm (PUL-31).
Crushed duplicates were created by riffle splitting crushed samples into two parts.
Gold analyses were completed using a 30 g lead fire assay and AAS finish (Au -AA23). Multi-
element analyses for 48 elements were completed using a geochemical four-acid digestion and
ICP-ES/MS finish (ME -MS61). Over -range assays for silver, copper, zinc and sulfur were
completed using an ore grade four -acid digestion and ICP -ES finish (ME -OG62). Additional
analyses were completed for barium and mercury.
Gold, silver, copper, lead and zinc assays for QC samples were reviewed to ensure that CRMs
are within tolerance limits specified on supplier certificates, BLKs are below acceptable
thresholds, and DUPs display statistical patterns normally expected for sample types, methods,
and elements. CRMs that returned assays outside of tolerance limits and BLKs with assays
above thresholds were deemed to have failed. Sample batches containing failed QC samples
were re-assayed to ensure that the QC samples returned acceptable results before release. All
QC monitoring data are reviewed and signed off by an independent QA/QC geologist.
There is no known relationship between core sample recoveries and assay grades. Ambler
Metals will submit 5% of the assay intervals from prospec tive lithologies to a laboratory
independent of ALS Minerals for check assaying.
Qualified Person
Richard Gosse, P.Geo., Vice President, Exploration for Trilogy, is a Qualified Person as defined
by National Instrument 43-101. Mr. Gosse has reviewed the scientific and technical information
in this news release and approves the disclosure contained herein.
About Trilogy Metals
Trilogy Metals Inc. is a metal exploration and development company which holds a 50 percent
interest in Ambler Metals LLC which has a 100 percent interest in the Upper Kobuk Mineral
Projects (“UKMP”) in Northwestern Alaska. On December 19, 20 19, South32, a globally
diversified mining and metals company, exercised its option to form a 50/50 joint venture with
Trilogy. The UKMP is located within the Ambler Mining District which is one of the richest and
most-prospective known copper -dominant distri cts in the world. It hosts world -class
polymetallic volcanogenic massive sulphide (“VMS”) deposits that contain copper, zinc, lead,
gold and silver, and carbonate replacement deposits which have been found to host high-grade
copper and cobalt mineralization. Exploration efforts have been focused on two deposits in the
Ambler Mining District – the Arctic VMS deposit and the Bornite carbonate replacement deposit.
Both deposits are located within a land package that spans approximately 181,387 hectares.
Ambler Metals has an agreement with NANA Regional Corporation, Inc., a n Alaska Native
Corporation that provides a framework for the exploration and potential development of the
Ambler Mining District in cooperation with local communities. Trilogy’s vision is to develop the
Ambler Mining District into a premier North American copper producer.
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Company Contact
Patrick Donnelly
Vice President, Corporate Communications & Development
604-630-3569
604-638-8088 or 1-855-638-8088
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Cautionary Note Regarding Forward-Looking Statements
This press release includes certain "forward -looking information” and "forward -looking statements” (collectively "forward -
looking statements”) within the meaning of applicable Canad ian and United States securities legislation including the United
States Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical fact, included
herein, including, without limitation, statements relating to interpretation of drill results; the Company’s beliefs regarding the
potential of the Arctic Project; the planned 2022 summer field season; the timing of results from the 2021 exploration program
and the remaining eight drill holes; and expectations regarding future drill results; are forward-looking statements. Forward-
looking statements are frequently, but not always, identified by words such as "expects”, "anticipates”, "believes”, "intends”,
"estimates”, "potential”, "possible”, and similar expressions, or statements that events, conditions, or results "will”, "may ”,
"could”, or "should” occur or be ach ieved. Forward-looking statements involve various risks and uncertainties. There can be
no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from
those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company's
expectations include the uncertainties involving impact of the COVID-19 pandemic; success of exploration activities, permitting
timelines, requirements for additional ca pital, government regulation of mining operations, environmental risks, prices for
energy inputs, labour, materials, supplies and services, uncertainties involved in the interpretation of drilling results and
geological tests, unexpected cost increases and other risks and uncertainties disclosed in the Company’s Annual Report on
Form 10-K for the year ended November 30, 202 1 filed with Canadian securities regulatory authorities and with the United
States Securities and Exchange Commission and in other Compa ny reports and documents filed with applicable securities
regulatory authorities from time to time. The Company's forward -looking statements reflect the beliefs, opinions, and
projections on the date the statements are made. The Company assumes no obligati on to update the forward -looking
statements or beliefs, opinions, projections, or other factors, should they change, except as required by law.