Gold in Ivory Coast

View of the abandoned Junction open pit which produced 5 t Au in 1996-1999 from oxidized ore

The Afema gold district in SE Côte d'Ivoire is controlled by regional NE-trending shear zones within a Paleoproterozoic (Birimian) volcanosedimentary sequence affected by low-grade metamorphism (chlorite geothermometry: 200-400°C). The post-metamorphic mineralization is in mylonitic quartz-muscovite-carbonate veins (locally cryptocrystalline graphite) parallel to the regional schistosity in meta-arenite and consists of pyrite, arsenian pyrite, arsenopyrite, and minor amounts of chalcopyrite, sphalerite, tetrahedrite, tennantite. Gold occurs as blebs and invisible in arsenian pyrite and arsenopyrite. Arsenopyrite geothermometry gives temperatures of 300-360°C. The hydrothermal system is chemically characterized by elevated As and Au, and depletion in Na (feldspar destruction). Ar-Ar dating on vein muscovite gave plateau ages of 1840 ±17 Ma and 1833 ±16 Ma; a Re-Os errorchron has an age of 1.9 ±0.1 Ga. Nd isotope analyses are in progress.

Name	Purpose	Lifetime	Type	Provider
_pk_id	Used to store a few details about the user such as the unique visitor ID.	13 months	HTML	Matomo
_pk_ref	Used to store the attribution information, the referrer initially used to visit the website.	6 months	HTML	Matomo
_pk_ses	Short lived cookie used to temporarily store data for the visit.	30 minutes	HTML	Matomo
_pk_cvar	Short lived cookie used to temporarily store data for the visit.	30 minutes	HTML	Matomo
_pk_hsr	Short lived cookie used to temporarily store data for the visit.	30 minutes	HTML	Matomo

Gold in Ivory Coast

Info

Portale

Wetter & Webcam

Social Media

Content

Content

Content

Gold in Ivory Coast