We have published in collaboration with Daniela Rubatto from the group Metamorphic Geochemistry and colleagues from ETH Zurich a paper in Contributions to Mineralogy and Petrology presenting a comprehensive investigation of the trace element distribution in garnet from three Alpine samples that underwent a complex evolution at different metamorphic conditions. Each grain was mapped in 2D directly in thin section with a novel approach using laser ablation inductively coupled plasma time of flight mass spectrometry (LA-ICP-TOFMS) to achieve a lateral resolution of 5 µm and limits of detection for the heavy rare earth elements (REE) down to 0.2 µg/g. 

LA-ICP-TOFMS element maps for an eclogitic garnet from the Sesia Zone (selection of elements; image from Rubatto et al, 2020). The red arrows in the Y and Er maps indicate the annulus.

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Rubatto, D., Burger, M., Lanari, P., Hattendorf, B., Schwarz, G., Neff, C., Keresztes Schmidt, P., Hermann, J., Vho, A., and Günther, D. (2020). Identification of growth mechanisms in metamorphic garnet by high-resolution trace element mapping with LA-ICP-TOFMS Contributions to Mineralogy and Petrology, 175, 61. Download pdf | Visit the journal webpage

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