Nb-Ta oxide minerals in alluvial placers from Kamakwie, NW Sierra Leone: compositional variations and evolutionary trend

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Authors	LOUN Jan NOVÁK Milan ŠKODA Radek ČOPJAKOVÁ Renata VAŠINOVÁ GALIOVÁ Michaela PROKEŠ Lubomír
Year of publication	2014
Type	Conference abstract
MU Faculty or unit	Faculty of Science
Citation
Description	Columbite-tantalite group minerals are extensively mined from alluvial placers near Kamakwie, Sierra Leone. Chemical composition and evolutionary trend of these minerals are presented. This extreme composition may be useful, along with trace elements variability and geochronological information, for the „fingerprinting“ of Ta ores.