Comment on Beronaguirre, Puelles, Ábalos, Gil Ibarguchi, García de Madinabeitia: short-duration regional metamorphic event recorded in a Variscan subduction channel (Malpica–Tui eclogites, NW Iberia). International Journal of Earth Sciences (2019) 108:2037–2046
Beranoaguirre et al. (Int J Earth Sci 108:2037–2046, 2019 ) have added a valuable piece of information to the Carboniferous tectono-thermal record of Europe by documenting a short-term pulse of heating in high-pressure metamorphic rocks of the NW-Iberian allochthons (c. 350 Ma, Malpica–Tui unit). They correctly state that the short duration of the thermal event is untypical of orogenic subduction/collision processes, but still envisage short-time heating within the subduction channel. The present comment is intended to point out that short-term thermal events of similar age are widespread in Europe and are part of a polyphase metamorphic history controlled by episodic heating from the mantle, probably over the plume-generation zone TUZO.