Boi Novo Copper Gold Project
Boi Novo Copper-Gold Project: A Regional-Scale Exploration Opportunity
The Boi Novo Copper-Gold Project represents a district-scale copper-gold exploration opportunity in Brazil’s Carajás Mineral Province (CMP), one of the world’s most prolific mineral belts. The CMP is host to globally significant deposits of iron, copper, gold and nickel, and is one of the world’s most active frontiers for Iron Oxide Copper-Gold (IOCG) discoveries.
The Boi Novo Project spans approximately 75 km² and includes the highly prospective Rio Novo copper-gold tenements acquired under an earn-in agreement in October 2025.
The combined project area delivers exceptional geological continuity, infrastructure access, and exploration upside — positioning Centaurus to pursue multiple high-grade copper-gold targets, with compelling potential also identified for iron ore discovery opportunities.
Location and Infrastructure
The Boi Novo Project is just 25km from Parauapebas, the regional centre and logistics hub for Vale’s Northern System rail line, which transports iron ore and copper concentrates from Carajás to the port of São Luís.
The project enjoys outstanding infrastructure advantages, sitting less than 20km from CoreEx’s Antas Norte copper flotation plant and only 35km from Vale’s copper-gold concentrate load-out facility servicing the Salobo and Sossego mines. The project is adjacent to a state highway and is crossed by a 230kV high-voltage power line. The terrain consists mainly of cleared farmland, facilitating year-round exploration access.
Geology
The Boi Novo Copper-Gold Project covers 75km2 of highly prospective ground in the eastern Carajás Mineral Province – the world’s premier Iron-Oxide Copper-Gold (IOCG) address. The Carajás hosts the world’s largest known concentration of large-tonnage IOCG deposits, almost all of which are found in the Itacaiúnas Supergroup.
The Boi Novo tenement package covers a more than 20km strike length of this highly prospective volcano-sedimentary sequence. Multiple prospects have been defined within the Neoarchean Grão Pará Group sequence of metavolcanic and Banded Iron Formations (BIF), with +500ppm copper-in-soil anomalies along +20km of discontinuous strike coincident with magnetic anomalies.
Copper-Gold Exploration
Drilling and geophysical surveys have confirmed significant high-grade mineralisation primarily at the Nelore West and East Prospects, with both prospects showing potential for expansion through future step-out drilling.
Nelore West Prospect
The Nelore West Prospect is centred on a 500m long structural corridor immediately south of the mafic–BIF contact, hosting two breccia pipes interpreted as part of a continuous pinch-and-swell mineralised trend. Drilling has confirmed strong copper mineralisation within both pipes.
Mineralisation comprises disseminated to semi-massive pyrrhotite ± chalcopyrite, with remobilisation linked to granitic sill emplacement. Significant intersections returned to date include 5.5m @ 8.38 % Cu from 147 m (BON-DD-24-026) and 36.7m @ 1.58 % Cu from 219.5 m (BON-DD-24-028). The mineralised trend plunges east-southeast, with opportunities for further growth between the breccia bodies and below the granitic sill.
Nelore East Prospect
The Nelore East Prospect, located ~300m south of the BIF-mafic contact, was a discovery made using Fixed-Loop Electromagnetic (FLEM) surveys that defined two conductive plates coinciding with a 500m long copper-in-soil anomaly.
Drilling intersected chalcopyrite-dominant copper-gold mineralisation typical of IOCG systems. Significant intersections returned to date include 11.5m @ 2.84 % Cu & 0.90 g/t Au from 91.9 m and 6.8m @ 1.89 % Cu & 1.08 g/t Au from 107.6m (BON-DD-25-040)
The host rocks show intense amphibole and biotite alteration, and mineralisation occurs as chalcopyrite stringers, veinlets and semi-massive zones. The combination of a strong copper-gold association and consistency with Carajás-style IOCG analogues underscores the high prospectivity of the area.
Rio Novo Prospects
Historical exploration at Rio Novo includes soil sampling, IP surveys and diamond drilling. The previous owner completed 1,465m of diamond drilling, with eight of the eleven initial holes intersecting copper mineralisation and alteration similar to that seen at Boi Novo. Historical assays from Rio Novo include 2.4m @ 4.08% Cu and 0.25g/t Au from 86.8m (RN-DD-008).
The broader tenement has seen no previous Electromagnetic (EM) geophysics or systematic soil sampling, both of which were instrumental to defining copper-gold mineralisation at Boi Novo.
Iron Ore Exploration
Drilling at Boi Novo has intersected broad zones of oxide and fresh itabirite iron ore over a strike extent of more than 6km.
An Iron Ore Exploration Target has been estimated for the Boi Novo Project of 520-780Mt grading 30-35% Fe, with the Exploration Target based on drilling, mapping and geophysics across four prospects (Bufalo, Guzera, Nelore and Zebu).
Preliminary bench-scale beneficiation testwork using a simple, low-intensity magnetic separation (LIMS) process has confirmed that a Blast Furnace pellet feed concentrate grading +68% Fe can be produced from the Banded Iron Formation (BIF) mineralisation with mass recoveries up to 39%.
