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Osisko Development Intersects 16.05 g/t Gold Over 7.50 Meters at Lowhee Deposit at Cariboo

29.06.2021  |  GlobeNewswire

MONTREAL, June 29, 2021 - Osisko Development Corp. ("Osisko Development" or the "Company") (TSX.V-ODV) is pleased to announce drilling results from the 200,000-meter 2021 exploration and category conversion drill program campaign at its Cariboo Gold Project ("Cariboo") in central British Columbia. A total of ten diamond drill rigs are currently on the Project.

Drilling Summary

  • A total of 16,000 meters in 52 holes have been drilled thus far in 2021 on the Lowhee Deposit Zone, the strike extension of the Cow Deposit, located on Barkerville Mountain (Figure 1).
  • Recent assay results include holes BM-21-020 to BM-21-036 (Figures 2 and 3).
  • Drill holes BM-21-031, BM-21-033 and BM-21-035 (Figure 3) intersected multiple mineralized vein corridors and include highlights of 45.80 g/t Au over 0.75 meters in drillhole BM-21-031, 16.05 g/t Au over 7.50 meters, including a sample of 93.70 g/t Au over 0.80 meters, located 20 meters from surface in BM-21-033 and 15.20 g/t Au in 4.85 meters in BM-21-035.
  • Mineralization has now been defined to a vertical depth of 350 meters and remains open at depth and along strike to the southeast.
  • Detailed drilling results, a drill hole location plan map and vertical cross section are presented at the end of this release.

Recent Drilling Highlights:

  • 3.07 g/t Au over 16.20 meters in hole BM-21-023
  • 11.35 g/t Au over 3.60 meters in hole BM-21-024
  • 11.79 g/t Au over 2.80 meters in hole BM-21-025
  • 17.44 g/t Au over 3.45 meters in hole BM-21-025 including
  • 69.20 g/t Au over 0.80 meter
  • 3.44 g/t Au over 11.10 meters in hole BM-21-026
  • 15.15 g/t Au over 2.00 meters in hole BM-21-027
  • 14.65 g/t Au over 4.15 meters in hole BM-21-028 including
  • 29.40 g/t Au over 1.45 meters
  • 20.02 g/t Au over 2.65 meters in hole BM-21-028 including
  • 61.70 g/t Au over 0.50 meters
  • 57.20 g/t Au over 0.55 meter in hole BM-21-029
  • 45.80 g/t Au over 0.75 meter in hole BM-21-031
  • 16.05 g/t Au over 7.50 meter in hole BM-21-033 including
  • 93.70 g/t Au over 0.80 meter
  • 50.20 g/t Au over 0.60 meter in hole BM-21-034
  • 11.70 g/t Au over 4.40 meters in hole BM-21-034 including
  • 47.40 g/t Au over 0.85 meter
  • 15.20 g/t Au over 4.85 meters in hole BM-21-035
  • 10.12 g/t Au over 3.05 meters in hole BM-21-035
  • 60.90 g/t Au over 0.55 meter in hole BM-21-036
  • 19.04 g/t Au over 4.25 meters in hole BM-21-036 including
  • 39.50 g/t Au over 1.30 meters
  • 27.45 g/t Au over 2.35 meters in hole BM-21-036

Chris Lodder, President of Osisko Development commented, "The continued positive assay results from our ongoing drill campaign at Lowhee will continue to increase confidence within the modelled vein corridors and expand at depth. With two drills focused on this zone, we will also systematically step out to the south east to further expand this deposit."

The primary focus of the drilling at Valley Zone is to increase indicated category ounces to support our ongoing feasibility study. These excellent results from Valley Zone are hitting our designed targets and expanding the vein corridors at depth."

Mineralized quartz veins on Cariboo are overall sub-vertical dip and northeast strike. Vein corridors are defined as a high-density network of mineralized quartz veins within the axis of the last folding event's folds and hosted within a brittle meta-sandstone or calcareous meta-sandstone. Vein corridors are modelled at a minimum thickness of 2 meters and average about 4.5 meters true width. Individual mineralized veins within these corridors have widths varying from centimeters to several meters and strike lengths from a few meters to over 50 meters. These corridors have been defined from surface to a vertical depth averaging 300 meters and remain open for expansion at depth and along strike. Gold grades are intimately associated with quartz vein-hosted pyrite as well as pyritic, intensely silicified wall rock haloes in close proximity to the veins.

True widths are estimated to be 60% to 75% of reported core length intervals. Intervals not recovered by drilling were assigned zero grade. Top cuts have not been applied to high grade assays. Complete assay highlights are presented in Table 1, drill hole locations are listed in Table 2.

Figure 1 is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/7823dd4f-fcd8-4657-ba67-4fc50117a527

Figure 2 is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/58c9e536-5481-42af-9903-930386b84ca1

Figure 3 is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/b0306874-db03-4069-9091-5810083225f0

Figure 4 is available at https://www.globenewswire.com/NewsRoom/AttachmentNg/9a7997dc-abfb-407f-8a3c-4dbaa4d70c43

Qualified Persons

Per National Instrument 43-101 Standards of Disclosure for Mineral Projects, Maggie Layman, P.Geo. Vice President Exploration of Osisko Development Corp., is a Qualified Person and has prepared, validated, and approved the technical and scientific content of this news release.

Quality Assurance - Quality Control

Once received from the drill and processed, all drill core samples are sawn in half, labelled and bagged. The remaining drill core is subsequently stored on site at a secured facility in Wells, BC. Numbered security tags are applied to lab shipments for chain of custody requirements. Quality control (QC) samples are inserted at regular intervals in the sample stream, including blanks and reference materials with all sample shipments to monitor laboratory performance. The QAQC program was designed and approved by Lynda Bloom, P.Geo. of Analytical Solutions Ltd.

Drill core samples are submitted to ALS Geochemistry's analytical facility in North Vancouver, British Columbia for preparation and analysis. The ALS facility is accredited to the ISO/IEC 17025 standard for gold assays and all analytical methods include quality control materials at set frequencies with established data acceptance criteria. The entire sample is crushed, and 250 grams is pulverized. Analysis for gold is by 50g fire assay fusion with atomic absorption (AAS) finish with a lower limit of 0.01 ppm and upper limit of 100 ppm. Samples with gold assays greater than 100 ppm are re-analyzed using a 1,000g screen metallic fire assay. A selected number of samples are also analyzed using a 48 multi-elemental geochemical package by a 4-acid digestion, followed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) and Inductively Coupled Plasma Mass Spectroscopy (ICP-MS).

About Osisko Development Corp.

Osisko Development Corp. is well-capitalized and uniquely positioned as a premier gold development company in North America to advance the Cariboo Gold Project and other Canadian and Mexican properties, with the objective of becoming the next mid-tier gold producer. The Cariboo Gold Project, located in central British Columbia, is Osisko Development's flagship asset with measured and indicated resources of 21.44 Mt at 4.6 Au g/t for a total of 3.2 million ounces of gold and inferred resource of 21.69 Mt at 3.9 Au g/t for a total of 2.7 million ounces of gold (see NI 43-101 Technical Report for resource October 5th, 2020). The considerable exploration potential at depth and along strike distinguishes the Cariboo Gold Project relative to other development assets as does the historically low, all-in discovery costs of US $19 per ounce. The Cariboo Gold Project is advancing through permitting as a 4,750 tonnes per day underground operation with a feasibility study on track for completion in the second half of 2021. Osisko Development's project pipeline is complemented by potential near-term production targeted from the San Antonio gold project, located in Sonora Mexico and early exploration stage properties including the Coulon Project and James Bay Properties located in Qu?bec as well as the Guerrero Properties located in Mexico. Osisko Development began trading on the TSX Venture Exchange under the symbol "ODV" on December 2, 2020.

For further information, please contact Osisko Development Corp.:
Jean Francois Lemonde
Vice President, Investor Relations
jflemonde@osiskodev.com
Tel: 514-299-4926

Forward-looking Statements

Certain statements contained in this press release may be deemed "forwardlooking statements" within the meaning of applicable Canadian and U.S. securities laws. These forwardlooking statements, by their nature, require Osisko to make certain assumptions and necessarily involve known and unknown risks and uncertainties that could cause actual results to differ materially from those expressed or implied in these forwardlooking statements. Forwardlooking statements are not guarantees of performance. Words such as "may", "will", "would", "could", "expect", "believe", "plan", "anticipate", "intend", "estimate", "continue", or the negative or comparable terminology, as well as terms usually used in the future and the conditional, are intended to identify forwardlooking statements. Information contained in forwardlooking statements is based upon certain material assumptions that were applied in drawing a conclusion or making a forecast or projection, including management's perceptions of historical trends, current conditions and expected future developments, results of further exploration work to define and expand mineral resources, expected conclusions of optimization studies, that vein corridors continue to be defined as a high-density network of mineralized quartz within the axis of the F3 fold and hosted within the sandstones and that the deposit remains open for expansion at depth and down plunge, as well as other considerations that are believed to be appropriate in the circumstances. Osisko considers its assumptions to be reasonable based on information currently available, but cautions the reader that their assumptions regarding future events, many of which are beyond the control of Osisko, may ultimately prove to be incorrect since they are subject to risks and uncertainties that affect Osisko and its business. Such risks and uncertainties include, among others, risks relating to the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management's geological modelling; the ability of to complete further exploration activities, including drilling; property and royalty interests in the Cariboo gold deposit; the ability of the Corporation to obtain required approvals; the results of exploration activities; risks relating to mining activities; the global economic climate; metal prices; dilution; environmental risks; and community and non-governmental actions and the responses of relevant governments to the COVID-19 outbreak and the effectiveness of such responses.

For additional information with respect to these and other factors and assumptions underlying the forwardlooking statements made in this news release concerning Osisko Development, see the Filing Statement available electronically on SEDAR (www.sedar.com) under Osisko Development's issuer profile. The forwardlooking statements set forth herein concerning Osisko Development reflect management's expectations as at the date of this news release and are subject to change after such date. Osisko Development disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, other than as required by law.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this news release. No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.

Table 1: Cariboo Gold Project 2021 Length Weighted Drill Hole Gold Composites

HOLE ID FROM M TO (M) LENGTH
(M)
AU G/T
BM-21-020 126.70 127.35 0.65 12.10
211.00 211.55 0.55 4.80
236.85 237.35 0.50 19.80
BM-21-021 54.20 54.75 0.55 10.55
BM-21-022 79.00 79.50 0.50 3.31
130.60 132.45 1.85 7.56
INCLUDING 130.60 131.85 1.25 10.65
180.20 180.75 0.55 3.59
BM-21-023 33.80 50.00 16.20 3.07
INCLUDING 45.00 46.10 1.10 28.40
AND 46.10 47.00 0.90 12.10
136.30 136.90 0.60 3.17
183.65 184.15 0.50 4.34
185.65 186.15 0.50 7.82
208.25 213.40 5.15 5.12
INCLUDING 208.25 208.75 0.50 9.75
AND 212.25 213.40 1.15 17.45
225.05 225.55 0.50 6.99
229.80 230.30 0.50 3.19
247.65 248.35 0.70 4.33
258.65 259.30 0.65 8.34
282.90 283.45 0.55 6.87
BM-21-024 59.45 62.45 3.00 2.56
75.50 76.00 0.50 11.00
114.30 117.90 3.60 11.35
INCLUDING 114.30 115.25 0.95 6.88
AND 116.40 117.00 0.60 35.30
AND 117.00 117.90 0.90 14.50
164.00 167.45 3.45 4.73
INCLUDING 164.00 164.50 0.50 15.15
AND 166.95 167.45 0.50 13.90
189.50 190.00 0.50 4.49
BM-21-025 258.15 261.15 3.00 7.29
INCLUDING 259.15 259.65 0.50 35.40
270.50 271.00 0.50 4.47
287.25 290.05 2.80 11.79
INCLUDING 287.85 288.40 0.55 9.48
AND 288.40 289.35 0.95 20.90
AND 289.35 290.05 0.70 10.35
297.65 298.15 0.50 6.69
304.20 307.65 3.45 17.44
INCLUDING 304.70 305.50 0.80 69.20
BM-21-026 65.20 65.85 0.65 5.95
73.40 74.80 1.40 5.84
INCLUDING 74.00 74.80 0.80 8.99
93.40 93.90 0.50 6.57
105.60 106.20 0.60 17.95
142.05 142.55 0.50 5.81
175.00 175.55 0.55 25.90
187.05 198.15 11.10 3.44
INCLUDING 187.75 188.30 0.55 5.89
AND 189.10 189.85 0.75 16.50
AND 193.25 193.75 0.50 10.90
AND 197.65 198.15 0.50 23.80
240.25 241.15 0.90 4.47
281.00 281.50 0.50 12.05
BM-21-027 210.60 211.10 0.50 4.87
248.50 249.00 0.50 5.26
280.05 281.10 1.05 6.61
313.50 315.50 2.00 15.15
INCLUDING 314.50 315.00 0.50 31.00
AND 315.00 315.50 0.50 29.10
BM-21-028 61.15 65.30 4.15 14.65
INCLUDING 61.15 62.30 1.15 13.55
AND 63.00 64.45 1.45 29.40
73.70 74.40 0.70 4.01
77.25 77.80 0.55 3.66
87.60 88.25 0.65 12.75
90.40 90.90 0.50 3.48
106.20 107.60 1.40 12.29
INCLUDING 107.10 107.60 0.50 18.95
111.00 112.80 1.80 6.20
INCLUDING 111.90 112.80 0.90 10.50
122.80 123.30 0.50 5.48
125.50 126.00 0.50 7.87
136.40 139.05 2.65 20.02
INCLUDING 136.40 137.15 0.75 23.60
AND 138.55 139.05 0.50 61.70
153.40 153.90 0.50 34.00
BM-21-029 192.40 193.30 0.90 3.99
263.75 264.25 0.50 3.97
278.00 278.95 0.95 7.31
303.85 304.40 0.55 57.20
311.05 311.65 0.60 3.48
349.95 350.55 0.60 4.06
BM-21-030 78.00 78.50 0.50 4.30
157.90 158.40 0.50 8.41
BM-21-031 5.80 6.55 0.75 45.80
41.30 42.00 0.70 3.56
55.00 56.50 1.50 12.55
82.00 83.40 1.40 3.50
90.00 90.50 0.50 3.62
110.00 115.00 5.00 3.53
INCLUDING 111.35 111.90 0.55 8.35
AND 114.00 115.00 1.00 6.86
157.30 160.00 2.70 7.17
INCLUDING 158.00 159.00 1.00 5.70
AND 159.00 160.00 1.00 12.55
201.50 202.00 0.50 7.33
BM-21-032 HOLE ABANDONED
BM-21-033 23.90 24.40 0.50 17.80
40.50 48.00 7.50 16.05
INCLUDING 40.50 41.00 0.50 5.18
AND 45.20 46.00 0.80 93.70
AND 46.00 46.70 0.70 25.60
AND 47.50 48.00 0.50 47.50
129.70 130.20 0.50 10.50
139.00 139.50 0.50 5.09
143.00 143.50 0.50 8.74
200.00 203.50 3.50 3.47
INCLUDING 202.00 203.50 1.50 6.63
BM-21-034 186.30 186.90 0.60 50.20
196.40 197.00 0.60 5.70
274.40 275.55 1.15 3.47
276.10 280.50 4.40 11.70
INCLUDING 276.10 276.95 0.85 47.40
AND 279.95 280.50 0.55 19.90
287.45 288.00 0.55 3.94
299.85 300.40 0.55 19.05
BM-21-035 41.20 41.80 0.60 28.10
91.40 96.25 4.85 15.20
INCLUDING 92.50 93.00 0.50 12.20
AND 93.00 93.50 0.50 12.50
AND 93.50 95.00 1.50 28.60
AND 95.00 96.25 1.25 12.90
112.45 115.50 3.05 10.12
INCLUDING 112.45 113.45 1.00 17.45
AND 113.45 114.45 1.00 11.50
120.00 120.50 0.50 3.00
127.50 128.10 0.60 3.33
162.40 162.90 0.50 11.80
207.50 208.20 0.70 34.10
BM-21-036 178.90 179.45 0.55 11.30
197.80 198.45 0.65 9.11
208.25 208.85 0.60 11.35
212.50 213.00 0.50 9.50
227.55 228.10 0.55 60.90
255.25 259.50 4.25 19.04
INCLUDING 255.25 256.00 0.75 11.05
AND 256.00 256.85 0.85 21.00
AND 258.20 259.50 1.30 39.50
282.05 284.40 2.35 27.47
INCLUDING 283.50 284.40 0.90 57.90
295.00 295.60 0.60 14.75

Table 2: Drill Hole Locations and Orientations

HOLE ID EASTING NORTHING ELEV DIP AZI DEPTH (M)
BM-21-020 596555 5882840 1454 -47 300 357
BM-21-021 596553 5882747 1464 -55 318 57
BM-21-022 596553 5882747 1464 -55 314 221
BM-21-023 596555 5882839 1455 -53 294 378
BM-21-024 596543 5882721 1465 -51 305 297
BM-21-025 596573 5882880 1455 -45 304 330
BM-21-026 596544 5882723 1467 -63 301 303
BM-21-027 596573 5882879 1454 -50 304 369
BM-21-028 596542 5882724 1465 -59 312 312
BM-21-029 596574 5882879 1454 -52 305 420
BM-21-030 596538 5882694 1465 -54 293 303
BM-21-031 596539 5882694 1465 -59 289 276
BM-21-032 596571 5882879 1454 -52 303 74
BM-21-033 596538 5882693 1465 -43 290 252
BM-21-034 596573 5882879 1455 -54 296 327
BM-21-035 596539 5882693 1465 -55 279 261
BM-21-036 596573 5882880 1452 -53 296 381


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