Name of the Mine
Segovia Operations.

Location  
Antioquia, Colombia.

Mine Owner/s  
Aris Mining.

Brief Description  
The Segovia Operations comprise a historical and current mining operation comprising four active underground gold mining operations – El Silencio, Sandra K, Providencia, and Carla – together with other mineral resources and exploration targets.

Brief History  
Segovia is situated in an historic mining district that has been producing gold for more than 150 years.

There is little documentation of the early history of mining at the property before 1852. Mostly placer or near-surface mining by the Spanish, using slave labour, occurred in the region of Segovia during the late 1500s, but was short-lived owing to the mountainous terrain, distance from navigable rivers, lack of labour, and high costs. Mining activity was limited from the mid-eighteenth century.

The first formal company to mine in the region of the property was Frontino, a UK company, first registered in London in about 1852. In 1977, Frontino was placed in self-administration by its creditors, and was placed under compulsory liquidation in September 2004. The Colombian Liquidation Advisory Board approved the sale of Frontino to Zandor Capital, a subsidiary of Medoro Resources, in March 2010. In June 2011, mining company Gran Colombia Gold and Medoro merged to form Gran Colombia Gold Corp. The company changed its name to GCM Mining Corp in 2021. On September 26, 2022, GCM Mining completed a business merger with Aris Gold and the combined entity was renamed Aris Mining Corporation. 

Aris Mining is the current 100% owner of the property.

Primary Metals/Minerals  
Gold doré.

Secondary Metals/Minerals  
Silver.

Geology/Mineralisation  
The Segovia property geology is dominated by the Segovia Batholith, andesite to dolerite dikes, an extensive system of high-grade gold mineralised quartz veins, and faulting resulting in offsets of the veins. The veins are controlled mainly by north-east-trending, shallowly dipping faults associated with diorite to andesite dikes. The average width of the quartz veins is about 1.2 m and pinches and swells along strike and down dip. The majority of the veins dip about 30° to the north-east, with a small number of steeply dipping veins. 

Several large-scale vein structures are being mined on the property, in addition to minor associated veins, including veins 1040, Nacional, and Veta Manto at the El Silencio mine, the Providencia vein at the Providencia mine, the Sandra K Techo vein at the Sandra K mine, and the La Gran Colombia vein at the Carla mine. There are several other associated smaller vein structures, some of which have been mined in the past, that are now identified as exploration targets, including Marmajito, Las Verticales, Vera, Cristales, Hilos 1 and Chumeca.

Reserves  
Total proven and probable reserves as at September 30, 2023, were estimated at 3.53-million tonnes grading 11.63 g/t gold for 1.32-million ounces of gold.

Resources  
Measured and indicated resources as September 30, 2023, were estimated at 7.9-million tonnes grading 14.34 g/t gold for 3.63-million ounces of gold. Inferred resources were estimated at 4.7-million tonnes grading 12.11 g/t gold for 1.82-million ounces of gold.

Type of Mine
Underground mine.

Mining Method  
The ore at Segovia has historically been mined using labour-intensive, manual, room-and-pillar mining methods from the 1.1-m- to 1.3-m-wide veins that mostly dip between 30° and 35°. In 2023, longwall mining was introduced to increase mining productivity.

Major Infrastructure/Equipment  
Segovia has well-established infrastructure including roads, the underground mine workings, the Maria Dama processing plant, a polymetallic concentrate processing plant, tailings storage facilities, power and water distribution networks, water and effluent treatment plants, water management systems, maintenance workshops, offices, metallurgical and chemical laboratories, core logging and storage facilities, and fuel and explosives storage. Sufficient area is available for future tailings storage facilities.

Prospects  
The expansion of the processing facilities by 50%, which will be completed in 2025, will allow for Segovia to gradually increase gold production from 200 000 oz/y to 220 000 oz/y, to more than 300 000 oz.

Contact Details 
Aris Mining
Tel +57 4 448 5220
Email info@aris-mining.com

Sources
Aris Mining. Website: https://aris-mining.com/