Dear colleagues, my team and I are currently working on developing isotopic dating methods in our lab focused on dating faults and set time constraints on the post-rift tectonic events of the Brazilian passive margin. We are already working with fault-filling calcite U-Pb data, but we also have several samples of epidote veins that we would like to investigate with LA-ICP-MS. I am aware of Peverelli et al. (2020) very interesting work about U-Pb dating of fault-related epidote using allanite as both primary and secondary standards, but we are open to other suggestions of matrix-matched reference materials if you have any. We are also looking for the Tara allanite standard for that matter, so if anyone knows a quicker way to acquire it would be of great help.

Thank you for your attention and best wishes to you all!