U-Pb dating of columbites: A geochronologic tool to date magmatism and ore deposits

Details U-Pb dating of columbites: A geochronologic tool to date magmatism and ore deposits U-Pb dating of columbites: A geochronologic tool to date magmatism and ore deposits

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.2137r&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 56, Issue 5, pp.2137-2142

Mathematics

Logic

7

Scientific paper

We have developed techniques for the U-Pb analysis of the mineral columbite [(Fe,Mn)( Ta , Nb ) 2 O 6 ], and report U-Pb ages obtained for three early Proterozoic columbites from the Baltic Shield of northern Sweden. The U-Pb ages of these columbites agree with other available geochronological data. U-Pb dating of columbite is therefore a potentially powerful tool in establishing reliable ages of pegmatites, alkaline and carbonatitic intrusions, and ore deposits of Sn, W, and REEs, all of which often contain columbite. Furthermore, columbite can be used to date peraluminous granites as it often occurs within Li-P-REE pegmatites associated with such granites.

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