Summary:
The Quinchía Gold Project lies along the eastern flank of the Western Cordillera of the Colombian Andes, within the Romeral Terrane and the Miocene Middle Cauca metallogenic belt. This belt hosts numerous porphyry and epithermal gold-copper deposits and is structurally controlled by the Cauca-Romeral fault system. Within the project area, the geology is dominated by volcanic rocks of the Combia Formation, intruded by dioritic to dacitic porphyries and associated magmatic-hydrothermal breccias, with additional exposures of Barroso Formation basalts and sedimentary rocks of the Amagá Formation.
Deposit Types
The Quinchía Gold Project hosts deposits that fall within the porphyry-epithermal spectrum of magmatic-hydrothermal systems. Miraflores is classified as a magmatic-hydrothermal breccia pipe representing a low- to intermediatesulphidation epithermal system, whereas Tesorito is a gold-rich gold-silver porphyry system with minor copper and molybdenite. Both deposits are spatially related to the Marmato Fault Corridor and are consistent with the continuum of porphyry-related mineralising processes recognised elsewhere in the Miocene Middle Cauca metallogenic belt.
Miraflores Deposit Model
Miraflores is a gold-silver-bearing magmatic-hydrothermal breccia pipe, genetically related to porphyry systems. These deposits are typically associated with shallow-level, volatile-rich intrusive centres within porphyry districts. Their formation is controlled by the exsolution of magmatic-hydrothermal fluids during the cooling and crystallization of porphyry intrusions.
Tesorito Deposit Model
The Tesorito deposit is interpreted as a gold-silver porphyry system, with minor copper and molybdenum, developed within a multiphase intrusive complex. Porphyry deposits of this type typically form in convergent margin settings, where intermediate to felsic magmas evolve and exsolve volatile-rich fluids. These fluids drive hydrothermal alteration and mineralization within the host rocks, commonly resulting in disseminated and vein-hosted sulphide mineralization accompanied by systematic alteration zonation.
Mineralisation
Mineralisation in the Quinchía district is spatially associated with hypabyssal porphyritic intrusions and related breccias, and is expressed as both gold-copper porphyry systems and epithermal-style deposits. Within the property, the principal deposits are Miraflores and Tesorito, which form the basis of the Mineral Resource estimates and Preliminary Economic Assessment.
In addition, other deposits and prospects occur within the broader Quinchía district, including the Dos Quebradas deposit, and deposits controlled by others such as La Cumbre. These deposits are porphyry-style systems and have been reported by other issuers to contain Mineral Resources.
Miraflores is a gold- and silver-bearing magmatic-hydrothermal breccia pipe with minor copper. Mineralisation occurs in a polymictic breccia body and adjacent volcanic rocks. The breccia pipe has approximate surface dimensions of 250 m by 200 m and extends to depths greater than 350 m, with mineralisation hosted in quartz-carbonate cement and enhanced by late-stage cross-cutting veins.
Tesorito is a gold-silver porphyry system with minor copper and molybdenite. Mineralisation is hosted in early to intermineral diorite porphyries and associated magmatic breccias, with extensions into surrounding andesites and sedimentary rocks. The system is elongated north-northeast, parallel to the Marmato Fault Corridor, with a footprint exceeding 700 m by 350 m and a vertical extent of at least 450 m. Mineralisation remains open to the northeast, southwest, east, and at depth, with drilling suggesting the presence of additional porphyry centres to the west of the Marmato Fault.
Miraflores
The Miraflores deposit is a magmatic-hydrothermal breccia pipe, classified as a low- to intermediate-sulphidation epithermal system. Mineralisation is hosted within a polymictic breccia body, interpreted to comprise at least three breccia pulses. The breccia has a steeply vertical geometry, with known mineralisation extending from surface to depths greater than 350 m.
The deposit is characterized by the following:
• Host rocks: Polymictic breccia (basalt, andesite, sediments) with quartz–carbonate cement; minor mineralisation in adjacent volcanics;
• Structure: Late, steeply dipping faults and veins cross-cut the breccia and control high-grade shoots;
• Alteration: Predominantly propylitic (carbonate–epidote–zeolite), influenced by Ca-rich clasts;
• Mineralisation: Disseminated and vein-hosted sulphides (pyrite, chalcopyrite, galena, sphalerite), rare molybdenite, with free gold and minor silver in vugs.
The Miraflores breccia pipe has approximate surface dimensions of 250 m by 200 m, with mineralisation traced to depths exceeding 350 m. High-grade zones occur between 200 to 300 m depth and are interpreted to represent a hydrothermal boiling horizon. Continuity of mineralisation is supported by drilling and by underground artisanal workings of the Asociación de Mineros de Miraflores (AMM). Limited deep drilling to approximately 500 m has intersected breccia containing visible gold, hydrothermal quartz-calcite and base metal sulphide mineralisation. These intersections suggest the presence of a potential second boiling zone at greater depth that has not yet been tested and represents a conceptual target for future exploration drilling.
Tesorito
The Tesorito deposit is interpreted as a gold-silver porphyry system with minor copper and molybdenite. Mineralisation is hosted primarily within early to inter-mineral diorite porphyry intrusives and associated magmatic breccias, with additional mineralisation extending into adjacent andesite porphyry, sandstones, mudstones, and basalts. Based on metal contents, Tesorito lies within the Au-rich field of porphyry deposits. The strongest mineralisation is typically associated with early diorite plugs, magmatic breccias, and zones of dense porphyry-style veining.
The deposit is characterized by the following:
• Host rocks: Diorite porphyry intrusions and magmatic breccias within andesites;
• Structure: NNE-trending (~040°), ~60°W-dipping mineralisation parallel to the Marmato Fault; secondary NW control on early intrusives;
• Alteration: Potassic core overprinted by phyllic and sericite–chlorite; propylitic in wall rocks;
• Mineralisation: Disseminated and stockwork pyrite, chalcopyrite, molybdenite, magnetite; gold associated with chalcopyrite in quartz–magnetite–sulphide stockworks.
The mineralised system has a footprint of more than 700 m in strike and 350 m in width, with vertical extent confirmed to at least 450 m. The system remains open at depth and along strike to the northeast and southwest, and with additional potential laterally to the southeast. Drilling to date indicates that mineralisation continues laterally across structural boundaries and suggests that additional porphyry centres may occur to the west of the Marmato Fault.
Other Prospects
In addition to Miraflores and Tesorito, several other prospects have been identified within the Quinchía Gold Project, including Dos Quebradas, Ceibal, Chuscal, Santa Sofia, La Loma, and Miracielo, along with additional targets that remain to be advanced. These prospects are characterised by similar intrusive-volcanic associations and alteration styles as the Miraflores and Tesorito deposits. They are commonly localised at intersections of north-northeast- and north-northwest-trending fault systems, and together underscore the broader district-scale potential of the property. These prospects are considered exploration targets only, and their potential is conceptual in nature. Future programs may include surface mapping, geochemistry, and drilling to evaluate their potential.