Dear Dr Mansard and coauthors,

Thank you for your careful revision of the manuscript and your detailed engagement with the reviewers' comments. The manuscript reads really well now.

I did note that a reader who is less versed in the metamorphic reactions involved might benefit from a brief paragraph introducing the principal reactions you expect in the system. I am not asking for an actual analysis, I am aware that the very small grain size precludes an exact compositional analysis of the actual reaction products, and this also does not seem critical for the principal findings of the manuscript. It would be good though to write briefly what you expect to happen, to lay the path for the findings you report/discuss later on.

With best regards,
Florian Fusseis

Dear Authors,

based on the Topical Editor's report and overall assessment of the review process, I am pleased to accept you manuscript for publication in Solid Earth.

Many thanks for choosing Solid Earth as a platform to publish your research.


Sincerely,
Federico Rossetti