Introduction
Segala Mining operates in Tabakoto in the Municipality of Sitakily about 15km from Keniéba.
Located in the south of the Kayes region, the Keniéba district covers an area of 16,800 km² with an average density of about 12 inhabitants/km². It is bounded to the north by Bafulabé and Kayes districts; to the south by the Republic of Guinea Conakry; to the west Rep. of Senegal and to the east by the Kita district.
The mine was acquired from Endeavour Mining in 2018 and operates in two permits: Segala Mining Cooperation (SEMICO) and Mines de Kofi (MIKO). Semico permit has one open-pit (Fougala) and two underground mines (Tabakoto and Segala) in operation. Miko permit has two operating open-pit mines (Baboto and Betea).
The share capital is 80% owned by NGUVU MINING LIMITED, with a presence in Ghana, Mali, and Niger and 20% by the Republic of Mali.
As part of the development of the deposits of the MIKO SA permit, the Nguvu Holdings group majority shareholder of MIKO SA and SEMICO SA has entrusted to Semico SA the processing of ore extracted from MIKO deposits.
Mining activity is by owner mining.
The mine has both open pit and underground operations. Mining activity is by owner mining.
The mined ore is processed by Carbon-in-Leach (CIL) technology. The processing plant is designed to treat oxide, transition and fresh ores. The design throughput treatment rate is 1.7 Mtpa.
TURBIDITE HOSTED VEIN OROGENIC GOLD DEPOSITS
Host Rock: Turbidity sedimentary rock (tourmaline front absent)
- +/- Associated with granite (improved heat flow & stronger hydrothermal systems)
- Each deformation of the Eburnean Orogen contains gold and is accompanied by alteration.
- Four dominant auriferous structures have been identified.
- Au zone grade and thickness Improves with multiple structures (Cross Structure Model)
SEGALA & KOFI OVER GEOLOGY MAP
TURBIDITE HOSTED VEIN OROGENIC GOLD DEPOSITS
Host Rock: Turbiditic sedimentary rock (tourmaline front absent)
- +/- Associated with granite (improved heat flow & stronger hydrothermal systems)
- Each deformation of the Eburnean Orogen contains gold and is accompanied by alteration
- 4 Dominant auriferous structures have been identified
- Au zone grade and thickness Improves with multiple structures (Cross Structure Model)
MULTIPLE GENERATION/AGE OF INTRUSION
- Early Dikes intruding D1 structure
- Small Plutons at onset of D2
- Multiple injection and enlarging of the Yatia Pluton (D2)
- Diorite intrusion, Lamprophyre, Diatreme and Kimberlite
- Phanerozoic Dolerite
- Kofi Gold mineralization is associated with pervasive silicification + Fe carbonate alteration, with disseminated sulphides: pyrite, pyrrhotite, arsenopyrite and chalcopyrite.
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