Espigão Copper-Gold Polymetallic Project


100% ownership of the Espigão exploration and mining licenses.


Espigão Copper-Gold Polymetallic Project


The Espigão Project is located in the state of Rondônia, NW Brazil. The project represents a Cu-Au exploration opportunity in a new frontier, with numerous geochemical and geophysical targets established along structural corridors extending over 200km². 

Early-stage opportunity in metal-rich but underexplored region of Brazil

Large tenement package with multi-commodity upside 100% owned

Extensive copper-bearing manganese, gold anomalies, and base metal / pathfinder elements point to large, zoned hydrothermal system.

Experienced management and technical team with significant regional expertise

Established CSR program generating widespread community acceptance in mining-friendly jurisdiction


Land Position and Geology


The Amazon Craton is a highly prospective crustal block known for its significant endowment in gold, copper, tin, manganese and iron. The Espigão Project is located, on the southwest margin of the Amazon Craton, in the western margin of the Proterozoic Rondônia-Juruena Province. The basement geology in the project area is dominated by a series of fractionated granitoids. An extensive network of mineralized structures extends over 200km2 in the ore of the licence area, and comprises base metal anomalous manganese veins, ferruginous breccias, tin-bearing greisen, and gold-bearing quartz-pyrite veins. The Company is focussed on testing the copper-gold potential of the licence area.

Project and Exploration History


Some past artisanal processing of alluvial gold has taken place (production unrecorded). Since 2007, more than 200,000 t of manganese oxide concentrates have been produced. A characteristic of the concentrates is that they have elevated copper (an average of > 0. 2% Cu to a peak of 0.8%Cu), and variable concentrations of other base metals (in places to percent levels). The chemical variations are consistent with partitioning processing in a large-scale hydrothermal system. Potential exploration analogues include Kitumba-type IOCG system, or intrusive system (several examples of which have a history of high-grade manganese production from Cu-anomalous vein systems). Some plant and infrastructure related to the manganese processing remains on the project, and tenure includes explorations licences, one approved mining licence, and several mining licence applications.

Espigão Metal Corridors on Total Count Radiometrics

District Scale Zonation:Copper and Gold +/- Lead +/- Zinc +/- Tin anomalies have been mapped North to South, East to West over distances >30 km by >15 km

Espigão Geophysical Targeting

Electromagnetic (EM) conductive plates are positioned above the magnetic anomalies and below the surface mineralisation



MThe exploration strategy is to leverage off a database of past exploration which has tested the vein systems at shallow levels (average depth of past drilling 40m below surface (depth of weathered extends to typically ~20-30 mbs). A HeliTEM survey has been completed over much of the area. Further assessment of modelling of Maxwell plate conductors is being integrated with inversions of the magnetic data to prioritize targets at depth. The existing steam and soil sampling databases will be progressively extended with systematic multi-element surveys along all corridors. Complementary geophysical surveys will be considered for deep targeting, including gravity, and electrical geophysical methods.

CSR – A Strong Partner for Local Stakeholders


Meridian’s operations team has extensive local and regional expertise and the Company believes in being a strong, contributing member of any community in which it operates. From the earliest stages of a project, Meridian seeks to build consensus among all stakeholders including employees, landowners, government and residents. Meridian strives to be an equal partner, investing alongside the community so that all parties have a stake in a project’s long-term success. Over the last two years, Meridian has undertaken specific initiatives including internal workshops on ethics and corruption, community and school information programs, working with local council to assist in road and infrastructure maintenance, investing in health and social programs and assisting the police force to implement road safety programs.  These initiatives provide tangible proof of Meridian’s commitment to the local community and help further de-risk the project. Meridian employees wear the words “Respect, Connect and Prosper” on their uniforms. It’s a constant reminder of shared responsibilities to the project and each other, and what can be achieved when all stakeholders work together.