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U-Pb zircon age of the youngest magmatic activity in the High Tatra granites (Central Western Carpathians)

Burda J., Gawęda A., Klötzli U.

Geochronometria

2013

Vol. 40, no. 2

134--144

Detailed cathodoluminescence (CL) imaging of zircon crystals, coupled with Laser Abla-tion Multi-Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS) U-Pb zircon dating was used to develop new insights into the evolution of granitoids from the High Tatra Moun-tains. The zircon U-Pb results show two distinct age groups (350±5 Ma and 337±6 Ma) recorded from cores and rims domains, respectively. Obtained results point that the last magmatic activity in the Ta-tra granitoid intrusion occurred at ca. 330 Ma. The previously suggested age of 314 Ma reflects rather the hydrothermal activity and Pb-loss, coupled with post-magmatic shearing.