The Boumadine deposit is described as shallow mineralizing system similar to volcanic-hosted epithermal veins developed in subaerial resurgent caldera environments (Bouabdellah and Levresse, 2016; Abia et al., 2003).

Mineralization is structurally controlled, consisting of zones of vuggy quartz and veins, veinlets, and tectonic-hydrothermal breccias.

Three successive and overlapping stages of mineralization are distinguished (Ait Saadi, 1992; Abia et al., 2003; Bouabdellah and levresse, 2016). The origin of the mineralization is probably the mixing between ascending deep seated fluid and meteoric waters that have generated precipitation of precious- and associated base- metal mineralization.

The Boumadine mineralization is structurally controlled and comprises a system of subvertical veins, veinlets, cemented breccias within veins and filling of tension gashes veins. Mineralized structures occur exclusively within the rhyolitic sequence of the Tamerzaga Formation.

The orientation of the mineralized structures is related to Ediacaran transcurrent tectonics represented by N30 to N-S strike-slip fault zones (Freton, 1988; Ait Saadi, 1992; Abia et al., 1999, 2003). The mineralization and associated alterations are developped at the proximity of magmatic vents. Alteration, which appears around the mineralization, develops an assemblage of major quartz and white micas with minor quantities of chlorite and calcite (Ait Saadi, 1992). ........

In Boumadine, there are five (5) mining zones called: CENTRE, SUD, NORD, TIZI and IMARIREN.

The mining should start with a small open pit at IMARIREN that will produce 100,000 m.t. per year for two years. During the same period, a ramp from surface will be started for the zones CENTRE and NORD to be ready to produce 1500 m.t. per day. That to include the IMARIREN open pit’s production for two years starting on year 2021. For the economic analysis in cash flow, it is assumed that all resources are mined by underground method.

All infrastructures, such as plant, offices, garage, warehouse etc., will be located at the CENTRE zone due to the fact that it is the biggest zone in tonnage of the five (5) zones forming the deposit.

Starting year 2023, the production will increase to 2000 m.t. per day up to the end of the mine life, which is scheduled for 2033 if there is no other addition to the actual total tonnage. We are assuming 330 days of mining production per year.

During the year 2026, a ramp will start for zone SUD. The same is planned for zones TIZI and IMARIREN during the year 2028.

The various zones of the deposit are located in competent rock and have steep overall dip, making it easily mined using free falling method as well as cut and fill method (same method than Zgounder). It is recommended to use the open long hole mining method as much as possible, with sub- levels for the proposed new mining sites.

- subscription is required.

The process plant will be designed to recover the lead, the zinc, the gold, the silver and the germanium from the fresh ore and the old tailings by a combination of flotation, pressure oxidation and cyanidation. For the fresh mine material the mill will incorporate the following sections : run-of-mine ore storage, a two-stage crushing plant, crushed ore storage, a double stages grinding bay with cyclone classification, lead, zinc and sulfides flotation, pressure oxidation of the sulfides concentrate, leaching (cyanidation) of the gold and the silver, refining and finally a water and reagents distribution system. For the old tailings, the process will be the same except that since the lead and the zinc were already floated and recovered during the 1989-1992 mining- milling operations, there will be no crushing, grinding or flotation. Process of old tailings will be done whenever there will be shortage of fresh ore from the mining operations. Even if for the first two years of operation ........