Property & Access
The Flecha de Oro Project includes the La Esperanza, Puzzle and Maquinchao exploration properties, consisting of 9,968, 1,952 and 2,000 hectares respectively, in central Rio Negro Province (Figure 1. Project Location). Details of the option agreements can be found in the latest Management Discussion & Analysis.
The properties are road-accessible at modest elevations that allow for year-round exploration. The closest town is Los Menucos, situated about 22 kilometres southeast of the Puzzle property.
Geology & Exploration Summary
[For full details of exploration results, please refer to the original News Releases.]
The Project lies within the Somuncara Massif, where low and high sulphidation gold systems have been explored for since the first discovery of gold in the area in 1995. Examples of other gold-silver projects in the area include the Calcatreu low sulphidation gold-silver project located 165 kilometres to the southwest, hosting 746,000 oz of Indicated gold equivalent resources and a further 390,000 oz of Inferred AuEq resources.i
At the La Esperanza property, Golden Arrow has identified similarities in size and geologic style to the Cerro Vanguardia district which is now being used as an exploration model. Key features of this district include:
- 100 square kilometres
- 100 gold and silver-bearing epithermal veins
- Cumulative exposed vein strike extent of more than 240 kilometres
- Has produced more than 4.5 million ounces of gold over the last 20 years
[Golden Arrow cautions that results from other companies are not necessarily indicative of expected Golden Arrow results. These facts were simply used to help prioritize the acquisition and guide exploration of these properties.]
The La Esperanza property has mineralization hosted by an older suite of granites and granodiorites with aplitic and pegmatitic dikes associated with a volcanic complex. More than 17 kilometres of veins, with widths of up to 7 metres, occur as swarms of quartz and chalcedony veins with banded, colloform and crustiform epithermal textures.
The main historic exploration activity was a trenching program carried out by Anglo Gold in the 1990´s which delineated quartz veins up to 2.5 kilometres in length with reported associated high-grade gold values. Golden Arrow’s on-going sampling of quartz veins, boulders and floats at La Esperanza are returning high-grade gold samples, and identifying vein corridors. Highlights include:
- 24.0 g/t Au over 2 m
- 18.0 g/t Au over 0.7 m including visible gold
- 13.09 g/t Au over 5 m
- 4.16 g/t Au over 2 m
A distinct set of veins with base metal mineralization included:
- 99 g/t Ag and 2.8% Cu over 0.2m
- 129 g/t Ag, 3.5% Cu and 0.2% Bi over 1.2m
The gold mineralization at the Puzzle property occurs in epithermal quartz veins, stockworks and hydrothermal breccias, hosted by the same volcanic complex associated with La Esperanza. Ground magnetic surveys and geochemical sampling to date have delineated a corridor 6.5 kilometres long and more than 150 metres wide with a main mineralized quartz vein and an adjacent quartz stockwork zone. The corridor is open in both directions. Highlights of sampling include 5 metres of 13.1 g/t gold in chip sampling.
The more recently acquired Maquinchao property has indications of a gold-copper-silver high-sulphidation epithermal system. This includes silicified breccia outcrop over a one-kilometre striking structure with strong alteration that returned coincident gold, copper and silver anomalies from due diligence sampling.
i Retrieved from http://patagoniagold.com/projects/calcatreu/ (07/26/2019)
ii http://panorama-minero.com/noticias/cerro-vanguardia-ha-sido-y-sigue-siendo-escuela/ (11/21/19)