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Nb-Ta oxide minerals of alluvial placers from the Sunsás belt, precambrian shield of Bolivia

Author
Alfonso, P.; Oliva, J.; Calvo, D.; Parcerisa, D.; García-Vallès, M.
Type of activity
Presentation of work at congresses
Name of edition
13th SGA Biennial Meeting
Date of publication
2015
Presentation's date
2015
Book of congress proceedings
Mineral resources in a sustainable world: 13th Biennial SGA Meeting 24-27 August 2015, Nancy, France: proceedings
First page
667
Last page
670
Project funding
Increasing yield on Tungsten and Tantalum ore production by means of advanced and flexible control on crushing, milling and separation process
Repository
http://hdl.handle.net/2117/81181 Open in new window
Abstract
The mineralogy of Nb-Ta oxide minerals from alluvial placers origin from rare-element pegmatites in the Sunsás Belt, Precambrian shield of Bolivia, was studied. In the studied placer deposits columbite group minerals are the most abundant Nb-Ta bearing minerals. Most compositions of this group belong to anganocolumbite, although ferrocolumbite and manganotantalite also exist. Columbite crystals exhibit oscillatory and irregular zoning. The Ta /(Ta+Nb ratio ranges from 0.08 to 0.5 and The Mn/Mn+...
Citation
Alfonso, P., Oliva, J., Calvo, D., Parcerisa, D., García-Valles, M. Nb-Ta oxide minerals of alluvial placers from the Sunsás belt, precambrian shield of Bolivia. A: SGA Biennial Meeting. "Mineral resources in a sustainable world: 13th Biennial SGA Meeting 24-27 August 2015, Nancy, France: proceedings". Nancy: 2015, p. 667-670.
Keywords
Bolivia, Columbite group, Niobium, Tantalum
Group of research
GREMS - Sustainable Mining Research Group
SSR-UPC - Smart Sustainable Resources

Participants

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