One hundred and fifty meter (150 m) below the level of the sea, the Assal Lake is located about 100 km in the west of Djibouti-town, in a huge depression of 115 km2. The Assal lake is made up by 54 km2 of bittern (saturated in salt: 25% of NaC1) and a huge loads of gem salt.
Features and quantity of deposit:
The salt, key product of the lake is located in the middle of the new economic pole of the Assal Lake. The tanks to the infiltration of the Goubet water and hot sources of water, more than six million tons of salt are brought there every year. This resource of salt would be inexhaustible, if the production equals to the annual renewable provision. This huge and worldwide known reserve of salt was estimated at more than one billion tons and the deposit is continually in reconstitution. The thickness of the crust vary between 20 and 80m and the volume of the bittern in the pore, the caverns and the cracks or fissures present inside and under the salt crust represent 1.9 billion of m3. The salt naturally produced in the Lake Assal is a sea salt.
The bittern in which it comes from is the result of the sea water concentration that comes in the lake through a network of faults. This later comes from the Goubet El Karab, which is itself in communication with the Tadjourah gulf.
According to the extraction zone, three distinct quality of salt are exploited:
The new investors in that field are welcomed and more and more encouraged by the government, in order to undertake and realise projects with equity capital or financing trough the institutional backers.