Zone 32: The High-Grade Core of the La Grande Project
Zone 32 is the principal gold occurrence at the La Grande Gold Project in the James Bay region of Quebec. Over 40,000 metres of historic diamond drilling have delineated a well-defined mineralized zone extending at least 600 metres along strike and 350 metres in vertical depth, with mineralization remaining open along strike, at depth, and laterally. A 5,000-metre drill program planned for 2026 is designed to expand and further define this system.
What type of deposit is Zone 32?
Zone 32 is interpreted as a shear-zone-controlled, intrusion-hosted Archean orogenic gold system, developed within and along the margins of the La-Grande-Sud Tonalite, a synvolcanic felsic intrusive body emplaced into volcano-sedimentary rocks of the Yasinski Group. The tonalite has been dated at 2,734 plus or minus 2 million years old by U-Pb methods on zircon.
Orogenic gold deposits are a major deposit type in the Superior Province and are typically associated with crustal-scale deformation zones, greenschist- to amphibolite-facies metamorphism, and syn- to late-tectonic hydrothermal fluid flow. These systems form through the migration of CO2-rich, low-salinity metamorphic fluids along deep-seated shear zones, with gold precipitated in structurally prepared zones in response to pressure fluctuations and fluid-rock interaction.
Mineralization at Zone 32 formed during regional D2 deformation, when metamorphic fluids migrated along reactivated shear zones and fractures within the tonalite and adjacent rocks. The tonalite was emplaced either during or shortly after volcanism and underwent subsequent deformation, making it both a rheological and chemical trap for mineralizing fluids. This is atypical in the regional context, where Archean orogenic systems are more commonly developed in supracrustal host rocks.
What are the mineralization styles at Zone 32?
Mineralization at Zone 32 occurs in several distinct styles. Disseminated sulphides, including pyrite, chalcopyrite, and sphalerite, are found within the deformed tonalite, as well as in the diorite and gabbro dykes that intrude it. The associated alteration halo is characterized by sericite and chlorite.
Gold-bearing quartz-tourmaline and carbonate veins are hosted in ductile and brittle-ductile structures. Sulphide veinlets, ranging from millimetre to centimetre scale, are also observed in the Zone 32 area and show evidence of deformation.
Alteration assemblages are zoned and pervasive, transitioning from proximal biotite-hematite alteration to sericite-carbonate-chlorite-quartz assemblages, with distal halos of tourmaline and fuchsite. Sulphide content is generally low (less than 5%), but fine-grained disseminated pyrite and arsenopyrite are common, often aligned along foliation or hosted within quartz and tourmaline vein selvages.
In addition to mineralization hosted in the primary tonalitic body, later intermediate to mafic intrusive phases within Zone 32 exhibit variable degrees of deformation and alteration, and locally contain significant gold mineralization where they have been reworked by the same D2 shear zones. Their role is interpreted to be passive and permissive, serving as structurally reactivated hosts mineralized during the same fluid pulse responsible for the main deposit. This underscores the structural control of the deposit and suggests that mineralization was not limited by lithology, but rather by the presence of interconnected, high-permeability shear pathways.
What gold grades have been intersected at Zone 32?
Historic drilling at Zone 32 has repeatedly delivered wide intervals of gold mineralization. Headline intercepts from the drilling database include:
83.8 metres at 7.95 g/t Au (LGS97-98), 56.0 metres at 2.73 g/t Au (LGS97-83), 47.4 metres at 2.06 g/t Au (LGS01-170, Pari Zone), 38.5 metres at 4.32 g/t Au (LGS98-125), 37.0 metres at 1.93 g/t Au (LGS12-224), and 36.0 metres at 3.37 g/t Au (LGS97-103).
These results were generated across multiple drilling programs by previous operators over more than two decades. Mineralization has been confirmed from surface to a vertical depth of approximately 300 metres in the main Zone 32 envelope.
Drill hole LGS12-224 intersected 1.93 g/t Au over 37 metres approximately 400 metres down-plunge from the main Zone 32 mineralization, confirming that the gold-bearing system continues at depth and that significant volumes of mineralized rock remain to be tested. The 2026 drill program is designed in part to follow up on this depth extension.
The historic drill results disclosed in this article were generated by previous operators of the Property. The independent qualified person, Mr. Martin Aucoin, M.Sc., P.Geo., conducted a site visit on January 6 and 7, 2026, during which he inspected drill core from a representative subset of mineralized intervals and confirmed that the inspected widths and depths are consistent with the drill hole database. The qualified persons consider the drilling database to be internally consistent and generally reliable, though QA/QC documentation prior to 2003 is incomplete.
What are the historical resource estimates for Zone 32?
Several historical resource estimates were completed for Zone 32 between 1999 and 2011 by independent and internal consultants. These studies collectively outlined between approximately 3 and 5 million tonnes grading 1.8 to 2.6 g/t Au and 0.15 to 0.25% Cu, based on cut-off grades near 1.0 g/t Au. When combined with the adjacent Zone 103 immediately to the north, the historical estimates suggest a total contained gold content in the range of 280,000 to 320,000 ounces.
The most recent estimate was completed by SGS Geostat Inc. in 2010 to 2011. This work included a site inspection, verification sampling, data validation, and three-dimensional block modelling. The validated database comprised 220 diamond-drill holes and 21 trenches totalling approximately 42,000 metres. Specific-gravity testing returned values between 2.68 and 3.04 t/m3, yielding a mean of 2.83 t/m3 applied to the model. Subsequent internal pit optimizations confirmed that mineralization geometry was more favourable for underground development.
A metallurgical test conducted in 1999 on a sulphide concentrate from the Zone 32 area grading 2.40 g/t Au and 0.37% Cu used a flotation method and returned a recovery rate of 90.3% for gold and 96.8% for copper.
All estimates precede the current CIM Definition Standards (2014) and are considered historical in nature. The qualified persons have not verified the underlying databases or estimation parameters, and these results should not be relied upon. They are presented solely to illustrate the property's exploration history and the evolving understanding of the deposit. The authors, and the issuer, are not treating these historical resource estimates as current.
What other mineralized zones exist near Zone 32?
Located in close proximity to Zone 32 are the Pari and Breche gold showings, associated with brecciated zones exhibiting biotite alteration and pyrite mineralization. The northeastern Mico-Milan showings are associated with sulphide veinlets, sulphide stockwork, hydrothermal breccias, and quartz/carbonate veinlets.
Zone 30 represents the down-plunge depth extension of the Zone 32 system. Zone 103 lies immediately north of Zone 32. Together, these form a coherent mineralized system that has been the focus of historic exploration over more than three decades. The 2026 drill program is designed to test several of these parallel structures, including the Pari Zone, Vein Zone, and Zone 30.
Other parts of the property contain additional occurrences. In the northeastern sector, the Orezone Showing comprises the C2 Zone and the Claire Zone. In the C2 Zone, gold is hosted in milky, fractured quartz veins within an ENE-WSW-trending shear zone cutting through a gabbroic body, with associated sulphide minerals including pyrite, pyrrhotite, and arsenopyrite (up to 10%). The Claire Zone, situated about 350 metres southwest of C2, contains gold in quartz veins within a shear zone hosted in basalt interlayered with felsic tuff, with sulphide-rich veins containing arsenopyrite (up to 30%), galena (up to 5%), pyrite (up to 1%), and chalcopyrite (1 to 5%). The Orage copper showing, located within the northern claim block, is a pyrite- and chalcopyrite-bearing quartz vein grading 0.80% Cu. These showings and the broader district context are discussed in the James Bay Gold District overview.
Although the primary deposit model at La Grande is structurally controlled orogenic gold mineralization, the geological setting is also permissive for volcanogenic massive sulphide systems and lithium-cesium-tantalum pegmatite mineralization. These possibilities remain secondary to the shear zone-hosted gold system.
The technical content of this article is supported by the NI 43-101 Technical Report on the La Grande Project dated January 12, 2026, prepared by Martin Aucoin, M.Sc., P.Geo. (independent, OGQ #0989) and Jonathan Marleau, M.Sc., P.Geo. (OGQ #2277) of Dahrouge Geological Consulting Ltd. The full Technical Report is available on SEDAR+.
Learn More
La Grande Gold Project (Project Overview)
Gold Exploration in the James Bay Region, Quebec
Gold Exploration in Quebec: Jurisdiction and Investment Framework