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Osisko Development Corp.: Osisko Development Intercepts 65 Grams Per Tonne Gold Over 4.57 Meters in Underground Drilling at Trixie, Tintic Project

Finanznachrichten News

MONTREAL, July 18, 2023 (GLOBE NEWSWIRE) -- Osisko Development Corp. (NYSE: ODV, TSXV: ODV) ("Osisko Development" or the "Company") is pleased to announce underground infill and exploration diamond drilling ("DD") and chip sampling results from new development areas as part of its ongoing exploration program at its 100%-owned Trixie test mine ("Trixie"), within the Company's wider Tintic Project ("Tintic" or the "Tintic Project"), located in the historic East Tintic Mining District in central Utah, U.S.A.

Chris Lodder, President of Osisko Development, commented, "The new underground drill results at Trixie have identified several previously unknown mineralized structures that extend existing zones. This enables us to start to plan underground development in those areas for future resource delineation and category conversion. Underground face chip sample results continue to define mineralized zones, namely below the main 625 level, down to and below the 750 level, as well as further to the south of the deposit approaching the Sioux Ajax fault, within our current drill areas."

DRILL ASSAY HIGHLIGHTS

This news release includes assays from 14 DD holes (refer to Table 1). Select assay highlights include:

  • 65.00 grams per tonne ("g/t") gold ("Au") and 344.39 g/t silver ("Ag") over 4.57 meters ("m") in TRXU-DD-23-026 (1.90 troy ounce per short ton ("oz/t") Au and 10.04 oz/t Ag over 15.00 feet ("ft."))
  • 5.09 g/t Au and 132.85 g/t Ag over 5.33 m in TRXU-DD-23-027 (0.15 oz/t Au and 3.87 oz/t Ag over 17.50 ft.)
  • 15.91 g/t Au and 368.00 g/t Ag over 1.07 m in TRXU-DD-23-030 (0.46 oz/t Au and 10.73 oz/t Ag over 3.50 ft.)
  • 18.91 g/t Au and 300.00 g/t Ag over 0.91 m in TRXU-DD-23-030 (0.55 oz/t Au and 8.75 oz/t Ag over 3.00 ft.)
  • 19.01 g/t Au and 124.00 g/t Ag over 1.22 m in TRXU-DD-23-033 (0.55 oz/t Au and 3.62 oz/t Ag over 4.00 ft.)

UNDERGROUND CHIP SAMPLE ASSAY HIGHLIGHTS

This news release includes assays from 55 underground exploration face, back and rib chip samples from 20 chip strings in development at Trixie (refer to Table 2). Selected assay highlights include:

  • 23.30 g/t Au and 54.38 g/t Ag over 1.65 m in CH01519 (0.68 oz/t Au and 1.59 oz/t Ag over 5.40 ft.) including
    • 51.22 g/t Au and 79.81 g/t Ag over 0.64 m in CH01519 (1.49 oz/t Au and 2.33 oz/t Ag over 2.10 ft.)
  • 30.17 g/t Au and 62.76 g/t Ag over 1.34 m in CH01527 (0.88 oz/t Au and 1.83 oz/t Ag over 4.40 ft.)
  • 16.29 g/t Au and 128.34 g/t Ag over 1.01 m in CH01529 (0.48 oz/t Au and 3.74 oz/t Ag over 3.30 ft.)
  • 7.50 g/t Au and 158.58 g/t Ag over 2.01 m in CH01530 (0.22 oz/t Au and 4.63 oz/t Ag over 6.60 ft.)

DRILL RESULTS SUMMARY

  • In 2023, the Company has drilled 60 holes for a total of 5,180 m (17,000 ft.) at Trixie.
  • Approximately 25% of the drilling to date consists of delineation of domains within the area of the current Trixie Mineral Resource Estimate ("Trixie MRE") and 75% is exploration drilling adjacent to the area of the current Trixie MRE, including step outs down dip, down plunge and along strike testing for mineralized structures.
  • Visible gold and disseminated pyrite in fault breccia was observed in TRXU-DD-23-026 and assayed 65.00 g/t Au and 344.39 g/t Ag over 4.57 m within the 75-85 structure (Figures 1 and 3).

Photos of visible gold in TRXU-DD-23-026 (field of view 1 cm diameter with hand lens)Photos of visible gold in TRXU-DD-23-026 (field of view 1 cm diameter with hand lens)

Figure 1: Photos of visible gold in TRXU-DD-23-026 (field of view 1 cm diameter with hand lens)


  • The 75-85 domain consists of a discrete, north-south striking moderate to steeply west-dipping structure in the footwall of the T4 that was historically mined prior to the discovery of the T2. See Figure 3 for domain geometry and relationships.
  • The T1 domain consists of Tintic Quartzite-hosted disseminated mineralization interpreted as a lower-grade halo to the T2. TRXU-DD-23-030 assayed 18.91 g/t Au and 300.00 g/t Ag over 0.91 m.
  • These drilling results will provide valuable infill data to improve our understanding and the confidence level of the mineralized zones defined in the Trixie MRE and to support a future mineral resource update.
  • The exploration results will indicate the extent of the mineralized structures and will assist in the direction of future underground exploration development.

CHIP SAMPLE RESULTS SUMMARY

  • Chip samples were collected from the T2 structure and T4 stockwork on the 625 level (See Figures 4 and 5)
  • Sampling on the 625 level focussed on development to the north towards the Trixie fault and the 756 vein.
    • Assays in this area include 30.17 g/t Au and 62.76 g/t Ag over 1.34 m in CH01527.
  • The sampling and drilling results provide support that our target areas to the north of Trixie and to the south down plunge of the T2 are mineralized and warrant further follow up drilling and sampling.
  • These sampling results will provide valuable data to improve our understanding and the confidence level of the mineralized zones defined in the area of the Trixie MRE and support a future mineral resource estimate update.

Face Sampling Methodology

As most structures at Trixie are steeply dipping to the east or west, current sampling procedures are designed to sample the structure. Chip samples are collected and do not exceed 1.0 m (3 ft.) in length. The face is washed for safety, and for better identification of mineralization, alteration and structures. The hanging wall and footwall of the structures are marked up on the face and back, samples intervals are marked up and follow lithological contacts.

Samples are collected in feet and assays are reported in grams per tonne and troy ounce per short ton gold and silver. Conversions to metric and imperial measurements are rounded to two decimal places.

About Trixie

The Trixie test mine is one of several gold and base metal targets within the larger Tintic Project consisting of >17,000 acres of patented mining claims and mineral leases within the historic East Tintic Mining District of Central Utah, U.S.A. The T2 and T4 structures at Trixie show multi-ounce gold grades associated with high sulphidation epithermal mineralization, structurally controlled and hosted within quartzites. The T2 structure mineralization consists of native Au, and rare Au-Ag - rich telluride minerals with quartz. The T4 is a mineralized stockwork zone is located in the hanging wall of the T2 and is comprised of Au-Ag rich mineralization in host rock quartzite with quartz-barite-sulphosalt stockwork veining. Mineralization reports consistent multi-ounce gold grades along the entire strike length.

A 3D model and virtual site tour of Trixie and the wider Tintic Project is accessible on the Company's VRIFY page at: https://vrify.com/decks/12801.

Information relating to the Tintic Project and the Trixie MRE is supported by the technical report titled "NI 43-101 Technical Report, Initial Mineral Resource Estimate for the Trixie Deposit, Tintic Project, Utah, United States of America", dated January 27, 2023 (with an effective date of January 10, 2023) prepared for the Company by independent representatives of Micon International Limited (the "Tintic Technical Report"). Reference should be made to the full text of the Tintic Technical Report, which was prepared in accordance with National Instrument 43-101 - Standards of Disclosure for Mineral Projects ("NI 43-101") and is available electronically on SEDAR (www.sedar.com) and on EDGAR (www.sec.gov) under Osisko Development's issuer profile and on the Company's website at www.osiskodev.com.

Trixie Project Area

Figure 2: Trixie Project Area


Trixie Cross Section Looking North

Figure 3: Trixie Cross Section Looking North


Trixie Long Section

Figure 4: Trixie Long Section


Trixie Long Section Sample Highlights

Figure 5: Trixie Long Section Sample Highlights


Table 1: Drilling Length Weighted Assay Composites at Trixie

METRICIMPERIAL
Hole IDDepth
from (m)
Depth to
(m)
Length
(m)
Au (g/t) Ag (g/t)Depth
from (ft.)
Depth to
(ft.)
Length
(ft.)
Au (oz/t)Ag (oz/t)Comments
TRXU-DD-23-004No significant assays Exploration + infill
TRXU-DD-23-021No significant assays Exploration + infill
TRXU-DD-23-02261.7263.091.375.7764.43202.50207.004.500.171.88Infill -75-85
TRXU-DD-23-02312.1913.110.910.6284.1340.0043.003.000.022.45Infill T4
TRXU-DD-23-02345.1146.631.521.77176.00148.00153.005.000.055.13Infill -75-85
TRXU-DD-23-02348.1649.381.224.7534.69158.00162.004.000.141.01Infill -75-85
TRXU-DD-23-02441.6143.281.684.9860.98136.50142.005.500.151.78Infill -75-85
TRXU-DD-23-02446.4847.851.372.70168.00152.50157.004.500.084.90Infill -75-85
TRXU-DD-23-02459.7460.961.223.1462.19196.00200.004.000.091.81Infill -75-85
TRXU-DD-23-02519.8120.420.610.3685.8565.0067.002.000.012.50Exploration
TRXU-DD-23-02575.2976.811.523.105.14247.00252.005.000.090.15Infill T1
TRXU-DD-23-025143.71144.931.220.40100.00471.50475.504.000.012.92Exploration
TRXU-DD-23-02645.7250.294.5765.00344.39150.00165.0015.001.9010.04Infill 75-85
TRXU-DD-23-02766.9068.121.222.2225.77219.50223.504.000.060.75Exploration
TRXU-DD-23-02774.3779.715.335.09132.85244.00261.5017.500.153.87Exploration
TRXU-DD-23-028124.82129.845.030.87190.82409.50426.0016.500.035.57Infill T1
TRXU-DD-23-028155.75156.670.910.02200.00511.00514.003.000.005.83Exploration
TRXU-DD-23-029Hole abandoned
TRXU-DD-23-03057.3058.371.0715.91368.00188.00191.503.500.4610.73Exploration
TRXU-DD-23-03094.4995.400.9118.91300.00310.00313.003.000.558.75Exploration
TRXU-DD-23-032No significant assays Infill T4
TRXU-DD-23-03342.9844.201.2219.01124.00141.00145.004.000.553.62Infill 75-85
TRXU-DD-23-034No significant assays Exploration + Infill


Table 2: Chip Length Weighted Assay Composites at Trixie

METRICIMPERIAL
Hole ID Depth
from (m)
Depth to
(m)
Length (m) Au (g/t) Ag (g/t)Depth from
(ft.)
Depth to
(ft.)
Length (ft.)Au (oz/t)Ag (oz/t)Target
CH01512No significant assays
CH01513No significant assays
CH01514 0.001.711.713.057.560.005.605.600.090.22T4
CH01518 0.521.651.1312.1716.011.705.403.700.360.47T4
CH01518Including1.341.650.3029.8639.804.405.401.000.871.16T4
CH01519 0.001.651.6523.3054.380.005.405.400.681.59T4
CH01519Including0.000.640.6451.2279.810.002.102.101.492.33T4
CH01519and0.640.940.3015.7477.032.103.101.000.462.25T4
CH01520 0.000.820.828.888.910.002.702.700.260.26T4
CH01521 0.611.711.104.517.102.005.603.600.130.21T4
CH01522 0.000.910.913.294.770.003.003.000.100.14T4
CH01523No significant assays
CH01524No significant assays
CH01525No significant assays
CH01526 0.000.910.9121.2596.570.003.003.000.622.82T4
CH01527 0.001.341.3430.1762.760.004.404.400.881.83T2
CH01528 0.550.760.2113.7191.331.802.500.700.402.66T2
CH01529 0.001.011.0116.29128.340.003.303.300.483.74T4
CH01530 0.002.012.017.50158.580.006.606.600.224.63T2
CH01530Including0.000.300.3030.6886.290.001.001.000.892.52T2
CH01531 0.821.130.302.8139.802.703.701.000.081.16T2
CH01531 1.652.160.522.6134.015.407.101.700.080.99T2
CH01532 1.492.010.523.63782.384.906.601.700.1122.82T2
CH01533 0.821.831.012.63114.172.706.003.300.083.33T2
CH01534 0.001.041.042.9261.690.003.403.400.091.80T2


Qualified Persons

The scientific and technical information contained in this news release has been reviewed and approved by Maggie Layman, P.Geo., Vice President, Exploration of Osisko Development, and a "qualified person" within the meaning of NI 43-101.

Quality Assurance (QA) - Quality Control (QC)

All drill core and exploration samples are dispatched to SGS Laboratory for offsite sample preparation and analysis. Samples are assigned a unique sample ID. All geological and sampling information is entered into Datamine Fusion database. Core is sawn in half and half is sampled. Certified standards and blanks are inserted into all sample dispatches. Samples are collected by Old Dominion Transportation and dispatched to SGS's Laboratory in Burnaby. Sample submission forms accompany the samples, and digital copies are emailed to SGS.

All core sample preparation is completed by SGS, including drying, crushing, and pulverizing of samples. Analytical assays include gold by 30 gram fire assay with AAS finish (GO_FAA30V10), and gold overlimits by fire assay with gravimetric finish (GO_FAG30V). Multielement analysis (including silver) is by four-acid digest with ICP-AES/ICP-MS finish (GE_ICM40Q12). The pulps are returned to Osisko Development and coarse rejects are disposed after 90 days. Assays are reported to Osisko Development and then loaded into Datamine Fusion. Quality Assurance-Quality Control ("QA/QC") samples are checked, and assays are merged with sample information for future reporting.

Underground face samples are collected by Company geologists from each of the active mining faces, with samples transported by the geologists from Trixie to the on-site Company laboratory located at the Burgin administrative complex. Underground samples are dried, crushed to <10 mm and a 250 g split is taken. The split is pulverized, and a 30 g Fire Assay with gravimetric finish is completed to determine gold and silver grades, reported in oz/short ton and g/t.

The Company's Burgin laboratory is not a certified analytical laboratory, but the facility is managed by a qualified laboratory manager with annual auditing by technical staff. Inter-laboratory check assays using ALS Laboratory as a third-party independent analysis of samples is routinely carried out as part of ongoing QA/QC work. Certified OREAS QC standards and blanks are inserted at regular intervals in the sample stream to monitor laboratory performance.

True width determination is estimated to be approximately 0.3 m to 2.4 m (1 to 8 ft.) wide for the T2 structure and approximately 3 m to 25 m (10 to 80 ft.) for the T4 mineralized stockwork zone located in the hanging wall of the T2 structure.

About Osisko Development Corp.

Osisko Development Corp. is a premier North American gold development company focused on high-quality past-producing properties located in mining friendly jurisdictions with district scale potential. The Company's objective is to become an intermediate gold producer by advancing its 100%-owned Cariboo Gold Project, located in central B.C., Canada, the Tintic Project in the historic East Tintic mining district in Utah, U.S.A., and the San Antonio Gold Project in Sonora, Mexico. In addition to considerable brownfield exploration potential of these properties, that benefit from significant historical mining data, existing infrastructure and access to skilled labour, the Company's project pipeline is complemented by other prospective exploration properties. The Company's strategy is to develop attractive, long-life, socially and environmentally sustainable mining assets, while minimizing exposure to development risk and growing mineral resources.

For further information, please contact Osisko Development Corp.:

Sean RoosenPhilip Rabenok
Chairman and CEODirector, Investor Relations
Email: sroosen@osiskodev.comEmail: prabenok@osiskodev.com
Tel: +1-514-940-0685Tel: +1-437-423-3644

CAUTIONARY STATEMENTS

Cautionary Statement Regarding Test Mining Without Feasibility Study

The Company cautions that its prior decision to commence small-scale underground mining activities and batch vat leaching at the Trixie test mine was made without the benefit of a feasibility study, or reported mineral resources or mineral reserves, demonstrating economic and technical viability, and, as a result there may be increased uncertainty of achieving any particular level of recovery of material or the cost of such recovery. The Company cautions that historically, such projects have a much higher risk of economic and technical failure. Small scale test-mining at Trixie was suspended in December 2022, if and when test mining re-commences there is no guarantee that production will continue as anticipated or at all or that anticipated production costs will be achieved. The failure to continue production may have a material adverse impact on the Company's ability to generate revenue and cash flow to fund operations. Failure to achieve the anticipated production costs may have a material adverse impact on the Company's cash flow and potential profitability. In continuing current operations at Trixie after closing, the Company will not be basing its decision to continue such operations on a feasibility study, or reported mineral resources or mineral reserves demonstrating economic and technical viability.

Cautionary Statement to U.S. Investors

The Company is subject to the reporting requirements of the applicable Canadian securities laws and, as a result, reports information regarding mineral properties, mineralization and estimates of mineral reserves and mineral resources, including the information in its technical reports, financial statements, MD&A and this news release, in accordance with Canadian reporting requirements, which are governed by NI 43-101. As such, such information concerning mineral properties, mineralization and estimates of mineral reserves and mineral resources, including the information in its technical reports, financial statements, MD&A and this news release, is not comparable to similar information made public by U.S. companies subject to the reporting and disclosure requirements of the U.S. Securities and Exchange Commission ("SEC").

CAUTION REGARDING FORWARD LOOKING STATEMENTS

Certain statements contained in this news release may be deemed "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 and "forward-looking information" within the meaning of applicable Canadian securities legislation. These forward-looking statements, by their nature, require Osisko Development 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 forward-looking statements. Forward-looking 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 forward-looking statements. Information contained in forward-looking 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; the utility and significance of historic data, including the significance of the district hosting past producing mines; future mining activities; the unique mineralization at Trixie; the potential of high-grade gold mineralization on Trixie; the potential for unknown mineralized structures to extend existing zones of mineralization; category conversion; the results (if any) of further exploration work to define and expand mineral resources; the ability of exploration work (including drilling and chip sample assays, and face sampling methodologies) to accurately predict mineralization; the ability to generate additional drill targets; the ability of management to understand the geology and potential of Trixie; the ability of the Company to expand mineral resources beyond current mineral resource estimates at Trixie; the timing and ability of the Company to complete upgrades to the Trixie MRE (or any subsequent MRE) (if at all); the timing and resumption of test mining activities at Trixie (if at all); the ability of the Company to complete its exploration objectives in 2023 in the timing contemplated (if at all); the ongoing advancement of the Trixie decline; the deposit remaining open for expansion at depth and down plunge; the ability to realize upon any mineralization in a manner that is economic; as well as other considerations that are believed to be appropriate in the circumstances, and any other information herein that is not a historical fact may be "forward looking information". Material assumptions also include, management's perceptions of historical trends, the ability of exploration (including drilling and chip sample assays, and face sampling) to accurately predict mineralization, budget constraints and access to capital on terms acceptable to the Company, current conditions and expected future developments, results of further exploration work to define or expand any mineral resources, as well as other considerations that are believed to be appropriate in the circumstances. Osisko Development 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 Development, may ultimately prove to be incorrect since they are subject to risks and uncertainties that affect Osisko Development and its business. Such risks and uncertainties include, among others, risks relating to capital market conditions and the Company's ability to access capital on terms acceptable to the Company for the contemplated exploration and development at Tintic; the ability to continue current operations and exploration; regulatory framework and presence of laws and regulations that may impose restrictions on mining; the ability of exploration activities (including drill results) to accurately predict mineralization; errors in management's geological modelling; the ability to expand operations or complete further exploration activities, including drilling and chip sample assays and face sampling; property and stream interests in the Tintic Project; the ability of the Company to obtain required approvals and permits; the results of exploration activities; risks relating to exploration, development and mining activities; the global economic climate; metal and commodity prices; fluctuations in the currency markets; dilution; environmental risks; and community, non-governmental and governmental actions and the impact of stakeholder actions. Readers are urged to consult the disclosure provided under the heading "Risk Factors" in the Company's annual information form for the year ended December 31, 2022, as well as the financial statements and MD&A for the year ended December 31, 2022, which have been filed on SEDAR (www.sedar.com) under Osisko Development's issuer profile and on the SEC's EDGAR website (www.sec.gov), for further information regarding the risks and other factors applicable to the exploration results. Although the Company's believes the expectations conveyed by the forward-looking statements are reasonable based on information available as of the date hereof, no assurances can be given as to future results, levels of activity and achievements. The Company disclaims any obligation to update any forward-looking statements, whether as a result of new information, future events or results or otherwise, except as required by law. Forward-looking statements are not guarantees of performance and there can be no assurance that these forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward-looking statements.

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.

Photos accompanying this announcement are available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/1504df1b-5495-4ec8-9ae4-498302f644af
https://www.globenewswire.com/NewsRoom/AttachmentNg/7e4def23-cce4-4a71-afb3-26baaee20168
https://www.globenewswire.com/NewsRoom/AttachmentNg/a6e98c7a-9601-47e5-a300-707f48deaa58
https://www.globenewswire.com/NewsRoom/AttachmentNg/18398f22-0f0e-4c37-812e-3beacc22281e
https://www.globenewswire.com/NewsRoom/AttachmentNg/746777dd-e16c-4d98-a44c-87c4af18e13b
https://www.globenewswire.com/NewsRoom/AttachmentNg/36a0f301-3fc3-4372-8fb1-7547532052d1


© 2023 GlobeNewswire (Europe)
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