XR-µCT

Polymetamorphism during the Grenvillian Orogeny in SE Ontario: Results from trace element mapping, in-situ geochronology, and diffusion geospeedometry

Our latest research unlocks the fascinating history of metamorphic rocks from the Grenville Province of SE Ontario. Using a variety of techniques, including high-resolution XR-µCT, LA-ICP-MS, and in-situ Lu-Hf geochronology, we are able to provide evidence for repeated metamorphic events during the Grenvillian Orogeny. Garnet crystals, which formed during these events, developed spectacular compositional and microstructural properties, and, once again, acted as the geological time capsules needed to gain insight into our planet’s past.

Read the preprint here, and the published version here:

Gaidies F, McCarron T, Simpson A, Easton RM, Glorie S, Putlitz B, Trebus K (2023) Polymetamorphism during the Grenvillian Orogeny in SE Ontario: Results from trace element mapping, in-situ geochronology, and diffusion geospeedometry. Journal of Metamorphic Geology, DOI: 10.1111/jmg.12745

Sneak preview of some recent research on elongated garnets with hexagonal symmetry!

Garnet is isometric, forming dodecahedral or trapezohedral crystals? Well, the ones shown in color below have hexagonal symmetry, with their long, three-fold rotation axes aligned at large angles to the rock matrix foliation.

Stay tuned for some recent results, integrating CT scanning, LA-ICP-MS mapping and in-situ Lu-Hf geochronology!