A new benchtop micro-XRF spectrometer, Bruker M4 TORNADO, was installed in 2018 in the laboratory facilities of the Geotalo, Turku. Micro-XRF is a powerful and fast tool for μm-scale geochemical analysis. Micro-XRF can be applied to a variety of geological sample sizes and types such as unpolished thin sections, rock blocks, epoxy impregnated lake sediments and biological materials. Although minimal sample preparation is needed for spot analyses, a flat, but not necessarily polished, surface is required for element maps and line scan analyses.
A) Fe distribution map of 10 epoxy samples (1.8mm thick) from
Lake Lehmilampi 100 μm pixel interval, 20ms/pix,time 9:26h
B) Details of Lehmilampi 15 mm interval and Si line scan, 20ms/pix, time 2:26h
Compilation map of Si, Cu and Zn of a unpolished thin sections and S, Ca and Mn distibution maps.
25 μm resolution, 20ms beam time, measure time 9h