Integra Resources Corp. (TSX-V: ITR) (NYSE American: ITRG) is pleased to announce an additional set of drill results from the 11,000 m stockpile drill program underway at the DeLamar Project located in southwestern Idaho. The drill results announced today are from 20 additional drill holes representing 825 m from the 11,000 m stockpile drill program. In total, the Company has drilled 10,164 m in 262 drill holes as part of stockpile drill program. With each new set of drill results, the Company’s confidence that this material, a portion of which was included as a pre-stripping cost in the Company’s 2022 Pre-feasibility Study (“PFS”), has the potential to increase the heap leach mine life and further enhance the robust economics presented in the PFS.
“The stockpile and backfill drill results announced today include long intervals of gold-equivalent grades that are similar to, if not better than, other in-situ targets drilled at the Project. This mineralized material was previously mined by past operators and stockpiled and/or used as backfill at DeLamar and Florida Mountain because it fell below the mill cut-off grade. The potential to transform this material into additional ounces of gold and silver should increase the heap leach mine life at DeLamar and further enhance the strong economics of the Project outlined in the 2022 PFS. The Company expects to complete a resource estimate for the stockpiles/backfill in Q2 2023 while preparing the Mine Plan of Operations for submittal to the Bureau of Land Management in the second half of this year,” stated Integra President and CEO George Salamis. “The DeLamar Project, along with the addition of Millennial Precious Metals’ Wildcat and Mountain View projects, as announced by the companies on February 27, 2023, has the potential to create a development-stage company with one-of-the-largest resource endowments in the Great Basin, assuming all requisite approvals are obtained and the merger is completed.”
The following table highlights selected intercepts from the DeLamar backfill and stockpile drill program announced today1,2,3,4:
|Drill Hole||From (m)||To (m)||Interval (m)||g/t Au||g/t Ag||g/t AuEq||AuCN Recovery (%)|
(1) Downhole thickness is true thickness.
(2) Intervals reported are uncapped.
(3) Gold equivalent = g Au/t + (g Ag/t ÷ 77.70). Rounding may cause minor discrepancies in the AuEq column.
(4) Au recovery based on cyanide shakes (“AuCN”) run on all intervals with Au assay values >0.1 g/t.
The following table highlights selected intercepts from the Florida Mountain stockpile and backfill drill program announced today1,2,3:
|Drill Hole||From (m)||To (m)||Interval (m)||g/t Au||g/t Ag||g/t AuEq|
Cyanide shake analysis is not performed on Florida Mountain samples. Gold occurrences in Florida Mountain material can often be coarse in nature, making comparisons between cyanide shake analyses and fire assays unreliable. Once pulverized, as per any cyanide shake procedure, all Florida Mountain material show high recoveries by cyanidation, rendering cyanide shake analysis unreliable for differentiating between ores that can be heap leached and those requiring grinding to achieve high recoveries.
To view a drill collar location map for the DeLamar stockpile/backfill drill program, please click on the links below:
To view a drill collar location map for Florida Mountain’s Jacobs Gulch and Tip Top drill program, please click on the link below:
Execution of Drill Program: Methodology
The stockpile drill program is being executed at 60 m collar spacings with select 30 m infill test holes to further verify grade variability. All drilling is vertical through the entirety of the stockpiles and backfill material. This drilling is being conducted by a combination of Sonic and traditional reverse circulation with casing advance drilling methods. Both these drilling methods maintain high sample quality and integrity throughout the drilling process. Additionally, the two drilling methods provide a basis for comparison for continuity. Sampling is being conducted at 1.5 m intervals for the whole of the drilling program with all samples sent to a third-party lab for analysis. These drilling methods also provide the opportunity for more advanced metallurgical tests in the future.
The Company anticipates completing an updated resource estimate on the Project in the first half of 2023 to incorporate results from the stockpile drill program.
Sampling and QA/QC Procedure
Thorough QA/QC protocols are followed on the Project, including insertion of duplicate, blank and standard samples in the assay stream for all drill holes. The samples are submitted directly to American Assay Labs in Reno, Nevada for preparation and analysis. Analysis of gold is performed using fire assay method with atomic absorption (AA) finish on a 1 assay ton aliquot. Gold results over 5 g/t are re-run using a gravimetric finish. Silver analysis is performed using ICP for results up to 100 g/t on a 5-acid digestion, with a fire assay, gravimetric finish for results over 100 g/t silver.
The scientific and technical information contained in this news release has been reviewed and approved by E. Max Baker Ph.D. (F.AusIMM), Integra’s Vice President Exploration of Post Falls, Idaho, a “Qualified Person” (“QP”) as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects.
About Integra Resources
Integra is a development-stage mining company focused on the exploration and de-risking of the past producing DeLamar gold-silver project in Idaho, USA. Integra is led by the management team from Integra Gold Corp. which successfully grew, developed and sold the Lamaque Project, in Quebec, for C$600m in 2017. Since acquiring the DeLamar Project, which includes the adjacent DeLamar and Florida Mountain gold and silver deposits, in late 2017, the Company has demonstrated significant resource growth and conversion while providing robust economic studies in its maiden preliminary economic assessment and now PFS. An independent technical report for the PFS on the DeLamar Project has been prepared in accordance with the requirements of NI 43-101 and is available under the Company’s profile at www.sedar.com and on the Company’s website at www.integraresources.com.
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