Osisko Continues to Add High Grade at Lynx 280 g/t Au Over 2.2 Metres in Lynx

TORONTO, Might 26, 2021 (GLOBE NEWSWIRE) — Osisko Mining Inc. (OSK:TSX. “Osisko” or the “Company”) is happy to offer new analytical outcomes from the continuing drill program at its 100% owned Windfall gold challenge situated within the Abitibi greenstone belt, City Township, Eeyou Istchee James Bay, Québec.

Vital new analytical outcomes offered under embody 55 intercepts in 18 drill holes (3 from floor, 15 from underground) and 9 wedges. The infill intercepts are situated inside outlined February 2021 mineral useful resource estimate (“MRE”) blocks (see Osisko information launch dated February 17,
2021). The enlargement intercepts are situated outdoors the February 2021 MRE blocks and both develop useful resource wireframes or are situated in an outlined zone or hall however don’t but correlate to a particular wireframe.

Osisko Chief Government Officer John Burzynski commented: “Right now’s infill and enlargement drilling outcomes proceed to return excessive grade intervals. Of observe is gap OSK-W-21-2391-W3 which once more extends Triple Lynx down plunge (initially prolonged OSK-W-21-2391, see March 17, 2021 information launch).”

Chosen high-grade intercepts embody: 280 g/t Au over
2.0
metres in WST-21-0712; 69.3 g/t
Au over 2.0 metres in OSK-W-21-2498, 23.9 g/t Au
over 5.1 metres in OSK-W-21-2067-W6, 25.4 g/t Au
over 4.7 metres in OSK-W-21-2480, 44.4 g/t Au over 2.5 metres in OSK-W-21-2473, 26.3 g/t Au over 3.8 metres in OSW-W-21-2492-W1, 39.3 g/t Au over 2.3 metres in WST-21-0756, 12.6 g/t Au over 3.7 metres in OSK-W-2391-W3 and 21.0 g/t Au over 2.0 metres in WST-21-0751. Maps exhibiting gap places and full analytical outcomes can be found at www.osiskomining.com

Infill Drilling

Notes: True widths are estimated at 55 – 80% of the reported core size interval. See “High quality Management and Reporting Protocols” under. LXM = Lynx Foremost, LX4 = Lynx 4, TLX = Triple Lynx and LSX = Lynx Southwest (SW).

Growth Drilling

Notes: True widths are estimated at 55 – 80% of the reported core size interval. See “High quality Management and Reporting Protocols” under. LXM = Lynx Foremost, TLX = Triple Lynx and SW = Southwest.

Drill gap location

Lynx Zone
Mineralization happens as gray to translucent quartz-carbonate-pyrite-tourmaline veins and pyrite substitute zones and stockworks. Vein-type mineralization is related to haloes of pervasive sericite-pyrite ± silica alteration and include sulphides (predominantly pyrite with minor quantities of chalcopyrite, sphalerite, galena, arsenopyrite, and pyrrhotite) and native seen gold. Substitute mineralization is related to sturdy pervasive silica-sericite-ankerite ± tourmaline alteration and incorporates disseminated pyrite from hint to 80% with native seen gold. Pyrite stockworks can type envelopes that attain a number of tens of metres thick. Fuchsite alteration is frequent and is spatially constrained to close the gabbros. Mineralization happens at or close to geological contacts between felsic porphyritic or fragmental intrusions and the host rhyolites or gabbros and domestically will be hosted alongside the gabbro-rhyolite contact.

Certified Individual
The scientific and technical content material of this information launch has been reviewed, ready and accepted by Mr. Louis Grenier, M.Sc.A., P.Geo. (OGQ 800), Director of Exploration for Osisko’s Windfall gold challenge, who’s a “certified individual” as outlined by Nationwide Instrument 43-101 – Requirements of Disclosure for Mineral Initiatives (“NI 43-101”).

High quality Management and Reporting Protocols
True
width
dedication
is
estimated
at
55-80%
of
the
reported
core
size
interval
for
the
zone.
Assays
are
uncut
besides
the place indicated. Intercepts happen inside geological confines of main zones however haven’t been correlated to particular person vein domains right now. Reported intervals embody minimal weighted averages of three.0 g/t Au diluted over core lengths of at the least 2.0 metres. NQ core assays have been obtained by both 1-kilogram display screen hearth assay or customary 50-gram fire-assaying-AA end or gravimetric end at (i) ALS Laboratories in Val d’Or, Québec, Vancouver, British Colombia, Lima, Peru or Vientiane, Laos (ii) Bureau Veritas in Timmins, Ontario. The 1-kilogram display screen assay technique is chosen by the geologist when samples include coarse gold or current the next share of pyrite than surrounding intervals. Chosen samples are additionally analyzed for multi-elements, together with silver, utilizing a 4 Acid Digestion-ICP-MS technique at ALS Laboratories. Drill program design, High quality Assurance/High quality Management (“QA/QC”) and interpretation of outcomes is carried out by certified individuals using a QA/QC program per NI 43-101 and business finest practices. Requirements and blanks are included with each 20 samples for QA/QC functions by the Company in addition to the lab. Roughly 5% of pattern pulps are despatched to secondary laboratories for test assay.

In regards to the Windfall Gold Deposit
The Windfall gold deposit is situated between Val-d’Or and Chibougamau within the Abitibi area of Québec, Canada. The Mineral Useful resource Estimate (“MRE“) outlined by Osisko, as disclosed within the information launch dated February 17, 2021 is supported by the technical report entitled “Preliminary Financial Evaluation Replace for the Windfall Challenge” dated April 26, 2021 (that features Windfall Mineral Useful resource Estimate with an efficient date of November 30, 2020), and assuming a cut-off grade of three.50 g/t Au, includes 521,000 tonnes at 11.3 g/t Au (189,000 ounces) within the measured mineral useful resource class, 5,502,000 tonnes at 9.4 g/t Au (1,668,000 ounces) within the indicated mineral useful resource class and 16,401,000 tonnes at 8.0 g/t Au (4,244,000 ounces) within the inferred mineral useful resource class. The important thing assumptions, parameters and strategies used to estimate the mineral useful resource estimate disclosed within the February 17, 2021 information launch are additional described within the full technical report ready by BBA Inc. in accordance with NI 43-101 and is obtainable on SEDAR (www.sedar.com) underneath the Company’s issuer profile. The Windfall gold deposit is at present one of many highest-grade resource-stage gold initiatives in Canada and has world-class scale. Mineralization happens
in
three
principal
zones:
Lynx,
Foremost Zone,
and
Underdog.
Mineralization is usually
comprised of
sub-vertical zones
following
intrusive porphyry
contacts
plunging
to
the
northeast.
The resources are outlined from
floor
to
a
depth
of
1,600
metres because it now contains the Triple 8 (T8) zone. The assets excluding T8 are outlined from floor to a depth of 1,200 metres. The deposit stays
open alongside
strike
and
at
depth.
Mineralization
has
been
recognized
at
floor
in
some
areas
and
as
deep
as
2,625
metres in others with vital potential to increase mineralization down-plunge and at
depth.

About Osisko Mining Inc.
Osisko is a mineral exploration firm targeted on the acquisition, exploration, and growth of gold useful resource properties in Canada. Osisko holds a 100% curiosity within the high-grade Windfall gold deposit situated between Val-d’Or and Chibougamau
in
Québec
and
holds
a
100%
undivided
curiosity
in
a
massive
space
of
claims
in
the
surrounding
City
Barry
space and close by Quévillon space (over 2,700 sq.
kilometres).

Cautionary Notice Concerning Ahead-Trying Data
This information launch incorporates “forward-looking data” inside the which means of the relevant Canadian securities laws that’s based mostly on expectations, estimates, projections and interpretations as on the date of this information launch. Any assertion that includes predictions, expectations, interpretations, beliefs, plans, projections, goals, assumptions, future occasions or efficiency (typically, however not all the time, utilizing phrases corresponding to “expects”, or “doesn’t anticipate”, “is anticipated”, “interpreted”, “administration’s view”, “anticipates” or “doesn’t anticipate”, “plans”, “funds”, “scheduled”, “forecasts”, “estimates”, “potential”, “feasibility”, “believes” or “intends” or variations of such phrases and phrases or stating that sure actions, occasions or outcomes “could” or “may”, “would”, “may” or “will” be taken to happen or be achieved) will not be statements of historic truth and could also be forward-looking data and are meant to determine forward-looking data. This information launch incorporates the forward-looking data pertaining to, amongst different issues: the Windfall gold deposit being one of many highest-grade resource-stage gold initiatives in Canada and having world-class scale; the important thing assumptions, parameters and strategies used to estimate the mineral useful resource estimate disclosed on this information launch; the prospects, if any, of the Windfall gold deposit; timing and skill of Osisko to file a technical report for the mineral useful resource estimate disclosed on this information launch; the timing and skill of Osisko, if in any respect, to publish a feasibility examine for the Windfall gold deposit; the quantity and kind of drilling to be accomplished and the timing to finish such drilling; the main target of the remaining infill drilling; the pattern of grade improve; the Lynx zone remaining open to enlargement down plunge; upgrading a inferred mineral useful resource to a measured mineral useful resource or indicated mineral useful resource class; future drilling on the Windfall gold deposit; the importance of historic exploration actions and outcomes. Such components embody, amongst others, dangers regarding the power of exploration actions (together with drill outcomes) to precisely predict mineralization; errors in administration’s geological modelling; the power of Osisko to finish additional exploration actions, together with (infill) drilling; property and royalty pursuits within the Windfall gold deposit; the power of the Company to acquire required approvals; the outcomes of exploration actions; dangers regarding mining actions; the worldwide financial local weather; metallic costs; dilution; environmental dangers; and group and non-governmental actions. Though the forward-looking data contained on this information launch relies upon what administration believes, or believed on the time, to be cheap assumptions, Osisko can’t guarantee shareholders and potential purchasers of securities of the Company that precise outcomes will likely be per such forward-looking data, as there could also be different components that trigger outcomes to not be as anticipated, estimated or meant, and neither Osisko nor every other individual assumes accountability for the accuracy and completeness of any such forward-looking data. Osisko doesn’t undertake, and assumes no obligation, to replace or revise any such forward-looking statements or forward-looking data contained herein to replicate new occasions or circumstances, besides as could also be required by legislation.

CONTACT INFORMATION:
John Burzynski
Chief Government Officer
Phone (416) 363-8653