Alkaline Rocks and Carbonatites of the World

Funded by HiTech AlkCarb - New geomodels to explore deeper for Hi-Tech critical raw materials in Alkaline rocks and Carbonatites

Yenchichi

stripes

Occurrence number: 
105-00-018
Country: 
Mali
Location: 
Longitude: 0.85, Latitude: 18.47

This intrusion is described by Liégeois and Black (1984) as consisting of adamellite but is shown on the 'Carte Geologique de l'Adrar des Iforas', 1:500,000 (Fabre, 1982) as 'Granites alcalins et hyperalcalins indifferencies'.

Age: 
Liégeois and Black (1984) give Rb-Sr isochron ages of 544(16 and 577(14 Ma.
References: 
FABRE, J. 1982. Carte geologique de l'Adrar des Iforas. 1:500,000. Direction Nationale de la Geologie et des Mines, Republique du Mali, et Centre Geologique et Geophysique de Montpellier (CNRS), France.LIÉGEOIS, J.-P. and BLACK, R. 1984. Petrographie et geochronologie Rb-Sr de la transition calco-alcaline-alcaline fini-panafricaine dans l'Adrar des Iforas (Mali): accretion crustale au Precambrien superieur. In. J. Klerkx and J. Michot (eds), Geologie africaine - African Geology. 115-25.
Location: 
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith