Category: Silver / Gold

Integra Gold Discovers Multiple, Steeply Dipping Zones up to 300 Metres Below Resource Limit at Triangle With Results Including 19.30 g/t Gold Over 8.0 Metres and Reports Widest Intersection to Date With 10.73 g/t Gold Over 16.0 Metres

VANCOUVER, BC--(May 20, 2015) - Integra Gold Corp. (TSX VENTURE: ICG) (ICGQF)

Press Release Highlights:

  • Hole TM-15-25 intersected thickest interval ever reported from Triangle with 10.73 grams/tonne gold ("g/t Au") over 16.0 metres ("m") in the C4 Zone (previously known as T10). The C4/T10 zone contributed more than 30% of the ounces to the Company's previous resource estimate and has been expanded significantly with step-out holes intersecting high-grade mineralization over 200 m away in multiple directions.
  • Ongoing interpretation has led to the identification of multiple, steeply dipping "C" structures which have now been confirmed with additional drill testing. Previous geological modelling and resource estimation was constrained to the shallower dipping "T" structures and did not account for additional mineralization contained within the steeper "C" structures. The updated model is remarkably consistent with the geological controls of the Main Plug at the Lamaque Mine, located 2 km northwest of the Triangle Zone.
  • Five holes extended below the previous resource estimate boundary in the intrusive host rock along a 200 m east-west trend, intersected new sub-parallel gold bearing zones to a vertical depth of 900 m. These zones are still open laterally and at depth with drill holes stopped in the intrusive host rock. Significant intercepts include (note: estimated true width 75% to 85%; individual assay values uncut):
    • TM-14-22EXT: 8.47 g/t Au over 8.5 m;
    • TM-14-42EXT: 12.00 g/t Au over 3.0 m;
    • TM-14-45EXT: 15.64 g/t Au over 2.0 m, 10.29 g/t Au over 2.0 m and 8.34 g/t Au over 4.0 m;
    • TM-14-52EXT: 14.97 g/t Au over 5.0 m and 19.30 g/t Au over 8.0 m.
  • Other significant intercepts reported today include (note: estimated true width 75% to 85%; individual assay values uncut):
    • TM-15-21: 18.01 g/t Au over 5.0 m;
    • TM-15-25: 55.82 g/t Au over 2.0 m and 10.73 g/t Au over 16.0 m ;
    • TM-15-28: 8.55 g/t Au over 9.0 m and 53.83 g/t Au over 3.0 m;
    • TM-15-33: 32.55 g/t Au over 2.0 m;
    • TM-14-52-W1: 20.18 g/t Au over 10.0 m;

Integra Gold Corp. (TSX VENTURE: ICG) (ICGQF) ("Integra" or the "Company") is pleased to announce additional drill results from its 2015 Triangle Zone ("Triangle") extensional drill program on the Lamaque South Gold Project ("Lamaque") situated in Val-d'Or, Québec.

Since the beginning of the year, the Company has completed 44,525 m of diamond drilling in 99 holes with 8 drill rigs operating on several key targets. Five of the drill rigs conducted step-out and resource expansion drilling at the Triangle Zone and completed 27,815 m in 46 holes. Results announced today are derived from 11 of these 46 holes representing 6,745 m. To date, 27 holes, totalling 18,195 m of drilling, all from the Triangle Zone, have been released from the 44,525 m completed in 2015. Assay results for the remainder of the drilling are pending and will be disclosed as they become available.

"The positive implications related to these thick, high grade intercepts and, more importantly, the newly interpreted "C" structures at Triangle, are far-reaching", commented Company President and CEO, Stephen de Jong. "Not only have we confirmed a rapidly growing and more steeply dipping C4 Zone in recent step-outs up to 250 m away from the core of the intrusive, but we have also managed to intersect other steeply-dipping "C" structures, both up and down-dip, which show excellent continuity. This newly identified structural pattern bears remarkable similarities to the Main Plug at the Lamaque Mine, which was mined down to a depth of a 1,100 m and produced over 4.5 million ounces. We have no doubt that these newly interpreted "C" structures and veins have the potential to significantly add to future resource estimates and enhance future mine plans."

2015 Triangle Extension Drilling Program

Drilling at Triangle focused on widely spaced step-out and extensional drilling. The Triangle holes disclosed in this news release are derived from drilling done to assess the potential for extensions of the deposit laterally in the volcanic units and to a depth of 900 m vertical. Selected significant drill intercepts from holes disclosed today are presented in the following table:

Drill Hole From
Assay (g/t)
TM-15-21 610.00 615.00 5.00 18.01 C4
TM-15-24 129.00
TM-15-25 138.00
TM-15-28 196.00
TM-15-33 273.00 274.00 2.00 32.55 T7'
TM-14-22-EXT 698.00
TM-14-42-EXT 624.00
TM-14-45-EXT 705.00
TM-14-52-EXT 595.00
TM-14-52-W1 543.00 553.00 10.00 20.18 C4

*Down-hole thickness; true width varies depending on drill hole dip; most 2015 drill holes were aimed at intersecting the vein structures close to perpendicular therefore true width are close to down hole width (approximately 75% to 85% ratio)
**1.00 g/t Au cut-off; individual assay values uncut, follow links to full assay table below for interval with cut values; no minimum thickness

To view a complete table of available composited results for the 2015 drilling at Triangle please click on the following link:

To view a location plan map of the drill holes disclosed today for Triangle please click on the following link:

Structural Setting and Geological Modelling

Gold mineralization at the Triangle Zone, highlighted by an abundance of quartz-tourmaline veins with minor amounts of pyrite, are now interpreted to be predominantly hosted within a series of parallel, steeper-dipping shear structures identified as "C" zones. These high angle structures strike east-west and dip south at angles varying from 55 to 75 degrees. The previously logged and interpreted "T" structures, which dip from 20 to 45 degrees to the south, continue to remain valid in the resource model although these gold bearing structures are now interpreted as second order structures to the more steeply dipping "C" structures. Both structures are gold mineralized, and both are host to quartz-tourmaline veins associated with minor amounts of pyrite, although the "C" zones are generally higher grade, more steeply dipping and more continuous. Our predictive model as it relates to the "C" and "T" structures will continue to evolve as more drill data becomes available in the months to come.

The evolution of the geological and structural model at Triangle is clearly showing that structural controls and mineralization patterns bear some striking similarities to those hosting gold mineralization at the adjacent historic Lamaque Mine. The following images present two similar figures; the first shows the Lamaque Mine idealized geological model and the related orientation of the mineralized structures at the mine. The second shows the updated Triangle model shown in a cross section, and the orientation of the newly interpreted, steeply dipping "C" structures. It is clear that both models show strong similarities which is not surprising given that the host rocks, geological setting, and structural domains are the same for both deposits. The Lamaque Mine which produced over 4.5M gold ounces is located 2 km northwest of the Triangle deposit.

Link to PDF of Idealized Geological Model for Lamaque Mine Main Plug:

Link to PDF of Triangle Section 296400E Highlighting Vertical "C" Structures:

To date the Company geologists have modelled 4 main steeply dipping "C" structures, although recent drill hole results indicate that additional gold bearing high angle structures are present at depth. The relevance and interaction of the "T" and "C" structures continue to evolve in the Company's model, bringing a higher level of predictability.

T10 Zone versus C4 Structure

The T10 gold mineralized structure is now interpreted to be a "C" type structure, named the C4 Zone. The C4 Zone is one of the thickest, highest grade zones reported to date at Triangle, and appears to extend a minimum of 625 m along strike and 500 m down dip. Assays are currently pending from additional step out holes both to the east and west of the zone as well as up to 150 m further down dip from previous step-out holes.

Prior to the 2015 winter drilling program, this zone carried approximately 30% of the Triangle Zone's indicated resource. As currently interpreted with the most recent drilling, this structure is showing the potential to grow the resource base significantly while also accounting for a larger portion of that resource. The Company expects to complete its resource update in early Q4 of 2015.

In order to provide readers with a better visualization of the size and continuity of the C4 zone, the Company has updated the vertical longitudinal section as shown in the following link. For clarification this is not a true longitudinal section along the plane of the vein, but a projection of the vein unto a vertical plane, vertical distances on the longitudinal will therefore be shorter than real down-dip distances.

Differentiating "C" and "T" Mineralized Structures

The primary main control at Triangle is a series of sub-vertical (55-80 degrees) east-west trending first order ductile shear zones ("C" structures) which have been identified over a strike length of at least 625 m and from surface to a depth of 900 m. The vertical shear zones host quartz-tourmaline veins and associated alteration (i.e. silica, albite, sericite) and are mineralized with 1-2% pyrite. Although the veins pinch and swell within the shear zones, they can be quite continuous as seen in the C4 Zone. The thickness of the shear zones range from 1 to 20 m and are best developed within the volcanic rocks that surround the intrusive at Triangle.

When the vertical shear zones intersect an intrusive, such as at that which occurs at Triangle, they generate a series of second order low angle brittle shear zones and fractures, which also host mineralized quartz tourmaline veins ("T" structures). The "T" structures are primarily confined within the intrusive and alteration is usually less intense than within the main "C" corridor.

Both the "C" and "T" structures are "shear veins" that share many similarities, including similar mineralogy, alteration and mineralization. The difference between the two is mostly the angle of the zones and the intensity of shearing and alteration which is stronger in the sub-vertical "C" structures.

Tension flat veins, a third order of structures developing from the "C" structures, are also present in this type of structurally controlled system; tension veins are usually less altered and the least continuous of the vein array.

Step-Out Results above the C4 Structure

A number of the significant intercepts disclosed in 2015 news releases (dated March 24, May 06 and May 20, 2015 respectively) are from other high angle "C" structures which are situated structurally above the C4 Zone and therefore closer to surface; notably the C1, C2 and C3 structures. These intercepts (individual assay values uncut) clearly show the potential for other steep mineralized zones to extend and potentially thicken beyond the intrusive host rock into the surrounding volcanics. The intercepts highlighted below are all outside of the known resource boundaries, between 25 m and 100 m in the down-dip direction and up to 150 m along strike.

  • TM-15-01 - 14.78 g/t Au over 2.0 m (zone C2);
  • TM-15-02 - 14.79 g/t Au over 10.0 m (zone C1);
  • TM-15-05 - 8.01 g/t Au over 4.5 m (zone C1);
  • TM-15-06 - 7.00 g/t Au over 7.0 m (zone C2);
  • TM-15-14 - 14.55 g/t Au over 6.0 m (zone C1);
  • TM-15-16 - 9.78 g/t Au over 7.0 m (zone C2);
  • TM-15-18 - 6.05 g/t Au over 12.0 m (zone C2);
  • TM-15-20 - 12.04 g/t Au over 2.0 m (Zone C2);
  • TM-15-24 - 8.11 g/t Au over 3.0 m (zone C3);
  • TM-15-25 - 55.82 g/t Au over 2.0 m (zone C2);
  • TM-15-28 - 8.55 g/t Au over 9.0 m (zone C2);

Substantial Mineralization Identified at Depth

In addition to the on-going drilling, a series of 2014 drill holes (5 in total, along a 200 m strike trend) were deepened in 2015, with the objective of testing for other sub-parallel zones structurally below the C4 zone, at depths greater than the current resource limit of 625 m vertical. The results provided below (individual assay values uncut) clearly highlight that other structures, some of them quite significant in thickness and grade, are present at depth. These deeper structures were not modelled in the February 2015 resource update (see news release dated February 10, 2015) and may represent substantial resource upside. It is promising that all five holes extended at depth encountered multiple mineralized zones, an exceptional hit rate for resource expansion drilling.

  • TM-14-22EXT - 26.21 g/t Au over 1.0 m and 8.47 g/t Au over 8.5 m;
  • TM-14-42EXT - 8.75 g/t Au over 1.0 m and 7.21 g/t Au over 2.0 m;
  • TM-14-45EXT - 15.64 g/t Au over 2.0 m, 10.69 g/t Au over 2.0 m and 8.34 g/t Au over 4.0 m;
  • TM-14-52EXT - 14.62 g/t Au over 1.0 m, 14.97 g/t Au over 5.0 m, 8.50 g/t Au over 3.0 m and 19.30 g/t Au over 8.0 m;
  • TM-14-57EXT - 5.26 g/t Au over 4.0 m.

Additional 2014 and winter 2015 drill hole deepening and extensions are planned during the remainder of the year pending review of site access. The Triangle Zone is partially covered by a swamp and is therefore better accessed during the winter months. The Company is also planning for 2015 a number of new deep holes to approximately 1,000 m vertical. These holes will be drilled south of the Triangle deposit with wedging performed to test deeper extensions of the known gold bearing structures (C1 to C4) and lateral extensions of the new structurally deeper structures intersected in the intrusive host rock.

Metallurgical Wedge Drill Holes

With the objective of obtaining additional core samples for Phase IV metallurgical testing, the Company completed a set of three wedged holes from TM-14-52 (original results disclosed on September 10, 2014). Results from one of these wedges (TM-14-52W1) and results from the deepened TM-14-52EXT give a preliminary appreciation for potential grade variations of gold mineralization at Triangle. The original and wedged holes are all within a 10 m radius of one another. The following table summarizes the results:

Drill Hole Interpreted
Gold Assay
TM-14-52 C4
TM-14-52EXT C4
TM-14-52W1 C4
TM-14-52W2 Results Pending
TM-14-52W3 Results Pending

*N/A = not available
**Down-hole thickness; true width varies depending on drill hole dip; most 2015 drill holes were aimed at intersecting the vein structures close to perpendicular therefore true width are close to down hole width (approximately 75% to 85% ratio)
***1.00 g/t Au cut-off; individual assay values uncut, follow links to full assay table above for interval with cut values; no minimum thickness

As more results from the other two wedged holes are expected in the next few weeks it is still too early to make final observations based on the results available. However, on a preliminary basis it can be observed that intersections from C structures (in this case C4) that were already high grade can potentially become substantially better grade (from 9.41 g/t to 20.18 g/t Au) while others from T structures (in this case T11a) can be lower in grade although still well mineralized (from 14.97 to 5.82 g/t Au). In both cases down-hole thicknesses remain more or less the same.

The Company conducts detailed geostatistical analysis during resource estimation in order to best determine estimation methodology and guidelines. Historically, at both the Sigma and Lamaque Mines, there was consistent positive reconciliation when comparing production statistics against reserve estimates done prior to mining.

The Company will continue to complete additional wedged drill holes and new holes when access permits to enhance its database of duplicate intercepts for geostatistical analysis that could then be potentially use for resource estimation validation.

2015 Drilling Program

All but one of the drill rigs have now been demobilized as Company geologists and core technicians continue to work through the backlog of drill-core from the 44,525 m of drilling completed in the first four months of 2015. The remaining rig is completing a 2,600 m program at the No. 3 Mine target before moving to the Parallel Zone to complete 3,000 m of definition drilling. Starting in August 2015 the Company expects to have a minimum of 4 drill rigs back in operation through year end.

Given an abundance of positive results and new zone discoveries in step out drilling and a lower than anticipated cost of drilling for the 2015 winter program, the drilling program at South Lamaque has been expanded from 50,000 m to a minimum of 75,000 m. The 2015 program is tasked at completing exploratory, extensional and definition drilling on numerous key targets including Parallel, No. 3 Mine, No. 6 Vein, No. 4 Plug, regional geophysical targets, and most importantly the Triangle Zone. The remainder of the 2015 planned drilling program will be completed during the summer and fall months.

To view a location map of infrastructures and known zones at Lamaque South please click on the following link:

Project and Company Profile

Integra's Lamaque South Gold Project and Sigma-Lamaque Mill and Mine Complex are located directly east from the city of Val-d'Or along the prolific Abitibi Greenstone belt in the Province of Québec, Canada, approximately 550 km northwest of Montréal. Québec is rated one of the best mining jurisdictions in the world. Infrastructure, human resources and mining expertise are readily available.

The Company's primary focus is on exploring and subsequently developing, subject to further underground exploration, its high-grade Lamaque South project. The Lamaque South property is divided into three clusters, the North, South and West cluster. The primary targets are the high-grade Parallel zone in the North Cluster and the Triangle zone in the South Cluster. The recently acquired Sigma Mill, located 1 kilometre from the Parallel zone and 3 kilometres from the Triangle zone, is a fully-permitted, 2,200 ton per day mill and tailings facility. The Sigma-Lamaque Mill and Mine Complex include the historic Sigma and Lamaque Mines which operated for 75 and 52 years respectively and produced more than 9 million ounces of gold in total.

Qualified Person

The Lamaque South exploration project and Sigma-Lamaque Mill and Mine Complex, jointly known as the Lamaque project, are under the direct supervision of Hervé Thiboutot, Eng., Senior Vice-President of the Company and Jacques Simoneau, Exploration Manager and P. Geo. Mr. Thiboutot and Mr. Simoneau Qualified Persons (QP's) as defined by the National Instrument 43-101. Alain-Jean Beauregard, P.Geo. and Daniel Gaudreault, Eng., Geo., of Geologica Inc., are responsible for the geological and technical supervision of the drilling and are independent QP's as defined by the National Instrument 43-101. The Company's QPs have reviewed the technical content of this release.

Quality Assurance - Quality Control ("QA/QC")

Thorough QA/QC protocols are followed on the project including insertion of duplicate, blank and standard samples in all drill holes. The core samples are submitted directly to Bourlamaque Lab in Val-d'Or for preparation and analysis. Analysis is conducted on 1 assay-ton aliquots. Analysis of Au is performed using fire assay method with atomic absorption finish, with a gravimetric finish completed for samples exceeding 5 g/t Au, or a metallic sieve assay for all samples containing visible gold. When available the gravimetric or metallic sieve assay results are used for the reported composite intervals.


Stephen de Jong
CEO & President

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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.

Cautionary Note Regarding Forward-Looking Statements: Certain disclosures in this release constitute forward-looking statements, including timing of completion of an updated resource estimate, timing of completion of an updated PEA and completion of the Sigma-Lamaque transaction. In making the forward-looking statements in this release, the Company has applied certain factors and assumptions that are based on the Company's current beliefs as well as assumptions made by and information currently available to the Company, including that the Company is able to obtain any government or other regulatory approvals, that the Company is able to procure personnel, equipment and supplies required for its exploration and development activities in sufficient quantities and on a timely basis and that actual results are consistent with management's expectations. Although the Company considers these assumptions to be reasonable based on information currently available to it, they may prove to be incorrect, and the forward-looking statements in this release are subject to numerous risks, uncertainties and other factors that may cause future results to differ materially from those expressed or implied in such forward-looking statements. Such risk factors include, among others, those matters identified in its continuous disclosure filings, including its most recently filed MD&A. Readers are cautioned not to place undue reliance on forward-looking statements. The Company does not intend, and expressly disclaims any intention or obligation to, update or revise any forward-looking statements whether as a result of new information, future events or otherwise, except as required by law.


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