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Location: 29 km NW from Koudougou, Burkina Faso
Av. Houari Boumedienne-, Immeuble Pharmacie Koulouba, 11BP1527 CMS Ouagadougou 11OuagadougouBurkina Faso
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Trevali is the indirect owner of 90% of the shares in the capital of Nantou Mining Burkina Faso S.A., the entity that owns the Perkoa Mine. The remaining 10% of Nantou Mining is owned by the Government of Burkina Faso, in accordance with the Burkina Faso Mining Law.
On November 14, 2022, Trevali Mining Corporation ("Trevali" or the "Company") announced that further to the October 6, 2022 press release of the Company, the Judicial Tribunal of Commerce in Burkina Faso has granted an order providing for the liquidation of the Company's 90%-owned subsidiary Nantou Mining Burkina Faso S.A. ("Nantou Mining"). A liquidator has been appointed by the Judicial Tribunal. The liquidator has assumed responsibility for the management of the affairs of Nantou Mining and Trevali no longer exercises operational control over Nantou Mining or the Perkoa mine.
The Perkoa deposit lies in a felsic to intermediary series of volcanic and volcaniclastic rocks, within the Paleoproterozoic Birimian Supergroup of West Africa. The prospective Birimian-aged rocks in Burkina Faso are the same sequences that host major gold deposits in Burkina Faso and in the neighbouring countries of Ghana and Mali. The Birimian Supergroup of West Africa is renowned for their gold mineralization; however, known occurrences of base metals are scarce. The Perkoa deposit represents the only significant zinc-silver massive sulphide mineralization discovered in the Birimian to date and it is also the first zincsilver massive sulphide mineralization discovered in this region. Only zinc is being recovered at the Perkoa Mine.The Perkoa deposit has been classified as a volcanogenic massive sulphide (“VMS”) deposit. VMS deposits are lenses and sheets of massive sulphide that form from seafloor hydrothermal systems where metal rich fluids precipitate on (exhalative) or near the seafloor (sub-seafloor replacement.). The Perkoa mineralization occurs as a series of stacked, northeast-southwest striking tabular VMS lenses hosted, and separated by, tuffaceous material that has been overturned with an average dip of approximately 70°. The deposit is unusual for its high concentrations of zinc and barium mineralization, and relatively low levels of lead and copper. Mineralization occurs within two continuous VMS lenses, the main Perkoa lens and the Hanging Wall lens. The main lens outcrops on surface and extends to a depth of approximately 620 metres below the topographic surface, characterized by a strike length that varies between 300 and 470 metres with a width that varies between 5 metres to 25 metres. The Hanging Wall lens extends from approximately 100 metres below the topographic surface down to a depth of approximately 820 metres with a strike extension that varies between 250 metres to 350 metres. Thickness of the Hanging Wall lens is narrower than the Main lens, varying from 5 metres to 15 metres.
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