The Isidora Gold Project is an advanced oxide gold project located in the prolific Maricunga Gold Belt in northern Chile. The project hosts 115.2Mt @ 0.56g/t Au for 2.1Moz Au (JORC 2012), supported by 20,531m of DDH and RC drilling.
The Isidora Gold Project (Isidora) is an advanced oxide gold exploration project located in the prolific Maricunga Gold Belt (MGB) in Northern Chile, in the Andes near the Chilean-Argentine border. Isidora is located approximately 125km due east of the city of Copiapo with a population of about 175,000. Â
Isidora Gold Project – Regional Setting
The MGB is characterized by epithermal gold +/- silver and porphyry gold +/- copper deposits that are Oligocene – Miocene in age and often associated with extinct strata-volcanoes.
The MGB hosts over 65Moz of gold resources in several world-class multi-million-ounce gold deposits such as the Salares Norte (Goldfields), La Coipa (Kinross), Fenix (Rio2), Marte-Lobo (Kinross), La Pepa (Mineros), and Abierto Norte (Barrick/Newmont).
Pantanillo itself hosts 115.2Mt @ 0.56g/t Au for 2.1Moz Au Mineral Resource (JORC 2012), which is supported by ~20,500m of DDH and RC drilling.
The Isidora MRE has an effective date of 14 May 2026. See Flagship Minerals ASX Release dated 14 May 2026 and titled “Isidora Gold Project – 2.1 Million oz Gold Resource Defined”.
Modern exploration commenced in 1983 and has been conducted by Anglo American, Empresa Minera Mantos Blancos (EMMB), a Chilean subsidiary of Anglo American, Kinross Gold Corp. (Kinross), Fortune Valley Resources (FVR) and Orosur Mining Inc (Orosur). Work completed includes geological mapping, soil and rock geochemical surveys, ground magnetics, trenching, reverse circulation (RC) drilling, diamond core drilling (DD), metallurgical testwork and supporting studies.
The Isidora gold deposit is over 1,500m long and up to 900m wide and remains open along strike and down-dip. The mineralised zone strikes NE-SW and dips at 30-45 deg to the southwest. Mineralisation is hosted in weathered and altered andesitic porphyry with sheeted and stockwork quartz veins.Â
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Isidora Gold Project – Local Setting
Oxide zones contain kaolinite, alunite, with limonite/goethite and hematite after pyrite. Fresh rock has a chlorite +/- magnetite Â
Isidora Gold Project – ASTOR Target Zones of Alteration
