How old is the Trebic durbachitic Pluton? Reply to comment on Ultrapotassic magmatism in the heyday of the Variscan Orogeny: the story of the Trebic Pluton, the largest durbachitic body in the Bohemian Massif by Schaltegger et al.

New re-evaluation of our U-Pb LA-ICP-MS data for strongly porphyritic melagranite 1322 from Petravec (NE part of the Variscan ultrapotassic Trebic Pluton, Moldanubian Zone of the Bohemian Massif) gives a weighted mean Pb-207/U-235 age of 335 +/- 3 Ma (2 sigma). This, together with our previous U-Pb LA-ICP-MS zircon age of 335 +/- 3 Ma and CA-ID-TIMS zircon age of 335.127 +/- 0.11 Ma newly acquired by Schaltegger et al. from the central part of the Trebic body pin-point its emplacement age to 335 Ma. Importantly, this datum constrains the oblique underthrusting of Brunia microcontinent, subvertical shortening and development of flat fabric in the Moldanubian Zone. Precise timing of the other Moldanubian durbachitic intrusions remains open to discussion.

Automated summary

The re-evaluation of geological samples confirmed the emplacement age of the pluton and provided insights into the tectonic development of the region. The timing of the other intrusions remains open to further research and discussion.