stripes
Occurrence number:
105-00-009
Country:
Mali
Location:
Longitude: 0.1, Latitude: 20.07
Carbonatite:
Yes
This small, circular complex is only 800 m in diameter. It consists of foyaite of two textural types. The first is homogeneous and consists of perthite, nepheline and pyroxene; the second is porphyritic with phenocrysts of nepheline several centimetres in diameter enclosing the other phases. There are some phonolite and tinguaite dykes and there are enclaves of ijolite in the foyaite. A few small dykes of rodbergite and brown carbonatite and sparse enclaves of white carbonatite also occur in the foyaite.
References:
SAUVAGE, J.-F. and SAVARD, R. 1985. Les complexes alcalins sous-saturés à carbonatites de la région d'In Imanal (Sahara malien): une presentation. Journal of African Earth Sciences, 3:143-9.
Map:
Fig. 3_163 The distribution of alkaline intrusions in the Tadhak Province, which lies to the northwest of the Iforas intrusions. The most northwesterly of the Iforas occurrences (Tessalit, No. 10) is shown.
Location: