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Integra Intersects 2.26 G/T AuEq Over 102 M at Sullivan Gulch, Including 1.30 G/T Au and 2,718 G/T Ag (36.28 G/T AuEq) Over 1.53 M

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Integra Intersects 2.26 G/T AuEq Over 102 M at Sullivan Gulch, Including 1.30 G/T Au and 2,718 G/T Ag (36.28 G/T AuEq) Over 1.53 M






  • Drill results from Sullivan Gulch (located on the eastern portion of the DeLamar Deposit) and Sommercamp-Regan at DeLamar include:
    • IDM-22-204 – Sullivan Gulch
      • 0.57 grams per tonne gold and 131.29 g/t silver (2.26 g/t gold equivalent) over 102.11 meters
        • Including 0.78 g/t Au and 875.25 g/t Ag (12.05 g/t AuEq) over 6.09 m
        • Including 1.30 g/t Au and 2,718 g/t Ag (36.28 g/t AuEq) over 1.53 m
        • Including 0.46 g/t Au and 176.01 g/t Ag (2.73 g/t AuEq) over 12.19 m
    • IDM-22-206 (the first 100 m is through historic Backfill) – Sommercamp-Regan (Main DeLamar Pit area)
      • 0.27 g/t Au and 48.42 g/t Ag (0.89 g/t AuEq) over 110.64 m
    •  IDM-22-207
      • 0.18 g/t Au and 24.36 g/t Ag (0.50 g/t AuEq) over 99.06 m
  • These drill holes, which were part of a metallurgical drill program and demonstrate the strong continuity of gold-silver at the Project, also extend the known mineralization at Sullivan Gulch by 30 m.
  • The first 100 m of drill hole IDM-22-206 tested historic backfill and encountered strong AuEq grades that could further complement future heap leach plans, providing additional evidence that these low-grade stockpiles and backfill at DeLamar and Florida Mountain have the potential to increase the Oxide-Mixed resource at the Project.
  • A portion of the high-grade intercepts announced today continue to define the recently discovered high-grade Northwest striking gold-silver zone that underlies the bulk tonnage low-grade resource at Sullivan Gulch, with continuity in the North zone of 350 m and the South zone of 350 m.


Integra Resources Corp. (TSX-V: ITR) (NYSE American: ITRG) is pleased to announce drill results from the DeLamar Project located in southwestern Idaho. The drill results announced today include long runs of strong mineralization at DeLamar, including multiple high-grade hits of silver. Drill hole IDM-22-207 extended mineralization below the Pre-feasibility Study Pit Constrained Resource by 30 m and drill hole IDM-22-206 demonstrated the potential for resource in the historic stockpiles and backfill at the Project.


“Integra is still very active on the ground and continues to execute on our stated objective of showing resource growth potential on a myriad of exploration fronts at DeLamar while advancing the Project towards permitting. The drill holes announced today continue to define Sullivan Gulch as an outstanding, prolific gold-silver target with substantial upside for future mining and processing scenarios. Sullivan Gulch is defined by a 100 m to 300 m wide thicknesses of disseminated low-grade, gold-silver mineralization underlain by a newly discovered high-grade gold-silver zone. This high-grade zone is open to the south, laterally, and at depth, complimenting the bulk tonnage resource above it, “noted President and CEO George Salamis. “Today’s intercept extends mineralization below the PFS resource pit by 30 m. In addition, the new high-grade zone has now been intercepted over a vertical extent of 215 m, and along a strike length of 350 m in the Northern zone and 350 m in the Southern zone. There remains a 370 m untested gap between the Northern and Southern high-grade zones, presenting an obvious high priority drill target.”


The following table highlights selected intercepts from the Sullivan Gulch drill results announced today:


Drill Hole From
g/t Au g/t Ag g/t AuEq
IDM-22-204 206.65 308.76 102.11 0.57 131.29 2.26
including 208.18 214.27 6.09 0.78 875.25 12.05
including 209.70 211.23 1.53 1.30 2,718.00 36.28
including 234.09 246.28 12.19 0.46 176.01 2.73
including 269.14 275.23 6.09 1.13 180.00 3.45
including 281.33 284.38 3.05 1.07 382.00 5.99
including 288.95 292.00 3.05 1.19 132.44 2.90
including 302.67 304.19 1.52 3.16 228.00 6.09
IDM-22-205 212.60 245.36 32.76 0.39 12.92 0.55
including 227.69 229.21 1.52 2.42 26.90 2.77
IDM-22-206 (backfill) 0.00 110.64 110.64 0.27 48.42 0.89
including 35.51 38.41 2.90 0.10 833.00 10.82
IDM-22-207 28.35 127.41 99.06 0.18 24.36 0.50
including 48.16 53.04 4.88 0.21 79.77 1.24
including 107.59 110.64 3.05 0.08 178.50 2.37
including 116.74 118.26 1.52 0.18 196.00 2.70
IDM-22-208 5.49 34.14 28.65 0.29 52.63 0.97
including 31.24 34.14 2.90 0.62 254.00 3.89

(1)   Downhole thickness: true width varies depending on drill hole dip; most drill holes are aimed at intersecting the vein structures close to perpendicular therefore true widths are close to downhole widths (approximately 70% conversion ratio)
(2)   Gold equivalent = g Au/t + (g Ag/t ÷ 77.70)
(3)   Intervals reported are uncapped

Sullivan Gulch:


Along with demonstrating the magnitude of the large low-grade gold-silver zone at Sullivan Gulch, the drill results announced today continue to expand the emerging high-grade vein system at Sullivan Gulch that trends Northwest and dips to the Northeast. This new discovery further enriches the high-grade component of Sullivan Gulch, the bulk of which dips to the Southwest. High-grade at Sullivan Gulch has been intercepted in a Northern zone over a 350 m strike length while the Southern zone, which includes intercepts from 2018 to present which align with the new geological model, also has a strike length of 350 m. There remains a 370 m untested zone between the North and South high-grade zones which has the potential to extend the strike length of this high-grade target to over 1,000 m. These intercepts further validate the geological model that in addition to a well-defined North-northwest trending vein system that dips to the Southwest which has seen most of the drilling at Sullivan Gulch, there exists a structurally controlled system in quartz latite that dips Northeast and is open to the south, laterally, and at depth.


In general, the mineralization at Sullivan Gulch is largely hosted by porphyritic rhyolite and latite units, capped by a banded rhyolite formation, all of which are of mid-Miocene age. The gold-silver mineralization itself consists of a zone of moderately intense low-sulphidation epithermal veining, clay alteration and related disseminated sulphides (mostly pyrite). IP indicates the potential for mineralization to extend a further 900 m to the south of the southern-most drilled section of Sullivan Gulch.


To view a cross section of Sullivan Gulch, click on the link below:


To view a drill plan map of Sullivan Gulch, click on the link below:


Historic Stockpiles and Backfill:


Drill hole IDM-22-206 is of particular importance to Integra as it provides additional evidence that the historic low-grade stockpiles and backfill at DeLamar and Florida Mountain are mineralized and could provide additional heap leach material in future mine plans. The Company estimates that 60 million tonnes of run-of-mine, low-grade Oxide material is stockpiled and/or used as backfill in multiple locations at the Project from its 20-year history of modern mining (1970s-1990s). Based on the Company’s reconciliation of milling records and the reconstruction of mined material, the Company believes this material exceeds the heap leach cut-off grades and has the potential to add mine life to the future operations.


The first 100 m of drill hole IDM-22-206 was through historic backfill, returning average AuEq grades in-line with Company estimates and potentially suitable for heap leach material, subject to further studies. Encountering these results in the first drill hole into historic backfill is encouraging.


Summer Work Program and Next Steps:


Following a brief pause, the Company expects to recommence drilling at DeLamar this summer. The proposed summer/fall drill program is being executed primarily on DeLamar private property on historic patented mining claims and is ready to proceed at the Company’s discretion.


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.


Qualified Person


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” 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 pre-feasibility study. 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 and on the Company’s website at

Posted July 21, 2022

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