Working with a petrographic thick section of an igneous rock, this presentation demonstrates the application and value of detailed X-ray phase mapping of very large area (27 mm X 48 mm). In order to calculate the bulk composition of a geological sample, or to interpret how the sample formed, an analyst needs to identify phases and their abundance over an area large enough to get a statistically appropriate representation of the complete sample.
This presentation shows how the multivariate statistical analysis of EDS spectral images enable the accurate identification and abundance determination of phases from very large sample areas in practical timeframes. Practical considerations, such as how much data is necessary to successfully generate phase maps, are also discussed.
Runtime: 20 minutes