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

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






Osisko Development Corp. (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 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 


Figure 2 is available at


Figure 3 is available at


Figure 4 is available at 


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 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 Québec 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.


Posted June 30, 2021

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