Mr. Andy Rendle reports

COSIGO RESOURCES ANNOUNCES RESULTS OF CONGLOMERATE LAYER BULK SAMPLE FOR GRAVITY CONCENTRATION TESTS

Cosigo Resources Ltd. has released results of its conglomerate layer bulk sample for gravity concentration tests.

Conglomerate bulk sample from the Chicken Coop conglomerate stratigraphic unit

Conglomerate bulk sample preparation

Knelson gravity testing was conducted on a composite 60-kilogram sample of the Chicken Coop (informal stratigraphic) unit conglomerate from the Taraira project. The entire sample was crushed to minus 3.35 millimetres, homogenized and rotary split into two-kilogram test charges, purged with nitrogen and stored in cold storage before being subjected to the metallurgical testing.

Metallics screen assay analytical procedures and results

A 500-gram pulverized head cut was used for a 75-micrometre screen metallics gold content determination. Two grind calibrations were conducted to achieve a primary grind sizing target of about 100 mum P80. The less than 75 mum fraction was assayed to extinction and two 30 g cuts from the 75 mum fraction were considered to adequately represent the remainder portion of the sample (Table 1).

The 60.9 g greater than 75 mum fraction recovered from the sample assayed 0.14 g/t Au and contained 50.1 per cent of the Au in 12.4 per cent of the sample mass. Two 30 g cuts from the 368.6 g greater than 75 mum fraction remainder portion averaged 0.02 g/t Au, representing 49.9 per cent of the Au in 87.6 per cent of the sample mass. The weighted average gold concentration of the sample was thus 0.03 g/t Au (Table 1).

Knelson separation test procedures and results

A one-pass 20-kilogram Knelson gravity test was conducted, with a 100 g cone used to collect the Knelson concentrate. The Knelson separation test conditions are further defined in Table 2. The Knelson concentrate was hand panned to produce a pan concentrate and a pan tail. The pan concentrate was assayed to extinction for gold, and the pan tails and Knelson tails were assayed for gold in duplicate (Table 3).

The Knelson separation test produced a Pan concentrate weighing 11.2 g, representing 0.1 per cent of the 20 kg sample and assayed 5.21 g/t Au, containing 6.9 per cent of the Au in the sample. The Pan tails were 48.1 g representing 0.2 per cent of the sample and assayed 10.2 g/t Au, containing 58.0 per cent of the Au in the sample. The Knelson tails were 19.9993 kg representing 99.7 per cent of the sample and assayed 0.02 g/t Au representing 35.2 per cent of the Au in the sample. The weighted average gold concentration of the 20 kg bulk sample was thus 0.03 g/t Au (Table 3).

Chicken Coop conglomerate: geology, extent and other sampling results

The Chicken Coop conglomerate has been defined over approximately 1,019-metre strike in line with the ridge in the Taraira project area (as announced in news release of Aug. 10, 2023). The conglomerate has been intercepted between the years of 2023 and 2025, three times during the company's core drilling of ChickenCoop hole No. 1 and No. 2 and during ridge line hole No. 22 and is approximately 5.08 metres in thickness (as announced in news release of April 23, 2024) and lies approximately at a yet to be confirmed depth of 19.90 to 25 metres below the artisanal historic reported gold-productive horizon locally named Chile Layer, so with further studies, it may be able to serve as a regional geological marker to help constrain the stratigraphic location of the Chile Layer.

The Chicken Coop conglomerate is typically a polymictic conglomerate with heterolithic subangular to rounded clasts including felsic to intermediate pumice, mafic scoria, quartzite, sandstone and chert in a sandy to possibly felsic volcanic ash matrix. The presence of a significant percentage of friable pumice and scoria, and the feldspar-rich (possibly volcanic ash) matrix suggest that transport distances for at least some of the components were relatively short and therefore locally sourced.

The Chicken Coop conglomerate itself has locally returned significantly elevated Au concentrations, particularly over 813 metres in its southeastern portion.

Erik Ostensoe, PGeo, a geological consultant to the company and a qualified person as defined by National Instrument 43-101, has reviewed and approves the scientific and technical disclosure in this news release.

About Cosigo Resources Ltd.

Cosigo Resources is a junior exploration company trading on the TSX Venture Exchange (symbol CSG.V). The company is focused on exploring and developing the gold potential of its properties in the Taraira district in southeast Colombia near the border of Brazil. The company also holds a 100-per-cent interest in the Willow Creek property, located in the northern sierras of Nevada near Winnemucca, a 100-per-cent interest in the Damian property in the Cordillera region of Colombia, and owns 13.26 per cent of DHK Diamonds Inc., a company exploring for diamonds in the DO27 region of the Northwest Territories of Canada.

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