On April 16, 2025, Discovery Silver Corp. reported the completion of the previously announced acquisition of Newmont Corporation’s Porcupine Operations based in and near Timmins, Ontario, Canada.
Summary:
The Porcupine Complex deposits are classified as orogenic gold deposits as defined by Gebre-Mariam et al., (1995), Groves et al., (1998), and Goldfarb et al., (2001).
Hoyle Pond
Dimensions
Mineralization at Hoyle Pond has been defined along an 850 m northeasterly strike near surface, and has been mined and drill defined down plunge at about a 40º dip for over 3 km. Currently mine infrastructure is established to 199 0m below surface and Mineral Resources are drill defined to 2500 m below surface. Veins vary from <0.1–3 m in thickness, but are thicker where later generations of quartz have further dilated the vein. Numerous parallel veins occur throughout the mine system, often allowing for wider zones to be mined.
Structure
The Hoyle Pond Main Zone and 1060 Zone deposits occur on opposite limbs of an open, northeast-plunging antiformal structure, hosted within carbonatized north-dipping tholeiitic basalts. The
Hoyle Pond Main Zone includes a series of generally northeast-striking, linked, quartz vein zones folded on a small scale with moderate west- and northeast-plunging axes.
The mineralizing fluid was injected during isoclinal folding and thrusting associated with D4 and D3 events. Mineralized fault-fill veins were emplaced in shear zones located at lithological contacts. Two generations of fault-fill veins are present at Hoyle Pond. In the north volcanic package fault-fill veins are hosted in D3 structures, and in the south volcanic package, more precisely the 1060 fault zone, the fault-fill veins formed during D4.
The 1060 Zone consists of at least five main vein structures (1060 B1, B2 and B3 zones, A zone and Porphyry zone) with orientations ranging from north to northeast and a generally subvertical dip. The veins are strongly boudinaged, with the long axis of the boudin oriented from sub-horizontal to shallow west–southwest plunging.
Mineralization
Most of the gold mineralization at Hoyle Pond occurs as coarse free gold in white to grey–white quartz shear veins with a variable ankerite, tourmaline, pyrite, and arsenopyrite content. The Hoyle Pond Main Zone and 1060 Zone occur on opposite sides of the ultramafic core. These zones consist of northeast-striking, subvertical quartz veins that are folded on a small scale. Flat-lying veins (7 veins, VAZ veins) are found throughout the deposit area. The quartz veins are generally boudinaged.
Mineralized veins can be cut by low-angle, barren extension veins.