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SYSMIN MALI - PROJET 7 ACP MLI 117 Volet 2-B<br />

ETUDE DE PRE-FEASIBILITE’ DES PEGMATITES LITHINIFERES<br />

DANS LES REGIONS DE BOUGOUNI-SIKASSO ET DE KAYES<br />

DNGM<br />

Autres Elements Distinctives<br />

- Pas de Etain (Sn)<br />

- Be 100 – 170 ppm<br />

- Césium (Cs) 30- 130 ppm<br />

- Nb 20-50 ppm Ta 10-40 ppm (pegmatites A)<br />

- Gallium (Ga) dans l’ordre des 30 ppm<br />

- Fe entre 0,5 e 0,9 %<br />

- Ti < 0,5 ppm (limite de detection)<br />

- K2O 6 - 10 % (10% Goualamina grossier)<br />

- Na2O 3 – 5 %<br />

Note: Pegmatite Goulamina grain fin (O,5% K2O - 6% Na2O)<br />

Rapport K/Na inverse dans la pegmatite grain grossier

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