Tasiast gold mine, Inchiri Region, Mauritania
|Latitude & Longitude (WGS84):||20° 35' North , 15° 30' West|
|Latitude & Longitude (decimal):||20.58333,-15.50000|
|Other regions containing this locality:||Sahara Desert, North Africa|
|Köppen climate type:||BWh : Hot deserts climate|
Open-pit gold mine.
Located in northern Mauritania approximately 300 kilometers north of the capital city Nouakchott and 162 kilometers east-southeast of the port city of Nouâdhibou.
Developed by Rio Narcea Gold Mines Ltd. Expected to be in production in mid-2007.
"Mineralization at Tasiast is predominantly hosted in a banded iron formation (BIF) that was altered and mineralized late during deformation and metamorphism. The rocks and mineralization are of Archean age and similar in style to deposits in comparable Archean terrains; for example Musselwhite in Canada." (http://www.rionarcea.com/s/Tasiast.asp)
"Gold occurs both in intensely altered BIF and in and around quartz carbonate veins and veinlets associated with pyrrhotite. Gold is typically located in around the sulfide grains or in the veins but only rarely within the grains. In late 2004, Rio Narcea completed 3,000 meters of drilling to test the depth extension of the high-grade zone beneath the main pit (Piment Central deposit) that was identified by drilling earlier in 2004. The drilling results suggest the potential of adding mineral resources amenable to underground mining which would further enhance project economics. The high-grade zone was traced to a vertical depth of 300 meters and remains open at depth." (http://www.rionarcea.com/s/Tasiast.asp)
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
3 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
2500 - 4000 Ma
|Archean intrusive and metamorphic terranes|
Age: Archean (2500 - 4000 Ma)
Comments: Mixtures of metamorphic and intrusive or plutonic rocks, tracts known as crystalline, migmatitic terranes, moderately to highly metamorphosed rocks of unknown origin with or without intrusions. This classification is inherently prone to variable interpretation, as other compilers might distinguish some packages by their metamorphic or gneissic protoliths, and the associated age ranges may be more variable.
Lithology: Intrusive and metamorphic terranes
Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.