SP Angel Research Note.14 Nov 2025 10:59
Pepas underscores value with high-grade, near-term production opportunity Orosur reacquired the wider Colombian Anza project from the MMA JV in November 2024 and has wasted no time in returning to exploration at the licence package.
Focus has been on Pepas, where 66 holes have now been drilled, returning highlight intercepts including: 112m at 5.3g/t Au, 59m at 10g/t Au, 62m at 12.8g/t Au, 47m at 15g/t Au.
Orosur is aiming to deliver a maiden MRE by year-end, before progressing the asset towards economic studies.
Whilst early, we have outlined a potential capital-light toll-treating scenario at Pepas, feeding into local processing facilities. Should metallurgical, permitting and other key workstreams prove the concept, Pepas could provide a source of cash-Aow through which to fund a wide exploration drive across the Company’s exploration portfolio.
Pepas: Potential 26kozpa toll-treating operation over 10-year LOM For Pepas, we value the asset using a conceptual DCF5 on a low-capex, toll-treating operation based on an assumed mining inventory of 2.5mt at 4g/t Au for 334koz Au.
Whilst we expect the upcoming MRE for Pepas to further refine our assumptions, we see a basecase resource based on open-pittable gold deposit over 250m length, 80m width and 50m depth with 2.6 t/m3 density.
Our conceptual model assumes a simple open-pit operation with development capital requirements - primarily road development and a small crushing plant of $25m - including contingencies, recoveries of 85%, strip ratio at 2:1, a 10-year LOM with average annual throughput of 250ktpa. This sees average annual payable production of 26koz for total gold production of 260koz.
For operating costs, we assume a mining cost of $5/t mined, $85/t for processing and toll treatment costs. We estimate c.21ktpm of trucked ore to local processing mills at a cost of $10/t of ore over an 80km distance. Factoring in state royalty rates of 4.5%, and $7/t G&A costs, alongside $5m in LOM sustaining capital, our AISC estimate for the Pepas toll treating operation stands at $1,222/oz over LOM.
Using our SP Angel in-house long-term gold forecast of $3,300/oz, this generates a posttax NPV5 of $204m and an IRR of 65%, or £0.37/share fully diluted for construction. Using spot prices of $4,000/oz, our post-tax NPV5 increases to $279m and IRR of 79% or £0.50/share fully diluted.
We discount this with a 0.5x risk multiple to reflect the pre-MRE and pre-engineering/metallurgical stage of the asset, which yields an attributable value of £0.18/share at our in-house gold price. As a result, our Pepas valuation underpins the current value of Orosur, suggesting the market is attributing no value to the near MRE APTA, alongside the highly prospective porphyry targets at El Cedro and the greenfield El Pantano gold project in Argentina.