U-Pb dating of stockwork zircons from the eastern Iberian Pyrite Belt

From: Journal of the Geological Society | Date: January 1, 1999| Author: | Copyright information

Zircons found in the stockwork zones of the massive sulphide Los Frailes deposit, Iberian Pyrite Belt, are interpreted to have grown during the hydrothermal alteration of host felsic volcanic rocks. Ion

microprobe (SHRIMP) dating gives a ^sup 206^Pb/^sup 238^U age of 345.7 +/- 4.6 Ma (2sigma) and together with published spore data from the deposit suggest an age of uppermost Devonian to lowermost Carboniferous. Stockwork zircons offer the possibility of precisely defining the emplacement ages of these giant sulphide accumulations over the whole Pyrite Belt and from this will emerge estimates ...

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