The Large Lakes Observatory at the University of Minnesota Duluth hosts the LacCore X-ray fluorescence (XRF) lab. Funded by the National Science Foundation and the University of Minnesota, this lab provides analyses for the paleoclimate research community.
The ITRAX XRF Corescanner provides nondestructive analysis for concentrations of most elements from Aluminum (atomic number 13) to Uranium (92). Stratigraphic resolution varies from 0.2 mm to 2 cm, and dwell time per sample point ranges from 1 second for abundant elements to 2 minutes for trace elements. Typical scans are at 5 to 10 mm stratigraphic resolution and 10 to 20 seconds per sample point. These parameters are selected to address the research needs of each project.
In addition to elemental analysis, the Corescanner also produces a digital X-radiographic image at 16-bit grayscale density and 0.2 mm resolution. Time required varies from 30 to 60 minutes per meter, depending on core thickness and density.
In May of 2015 the Itrax Core Scanning XRF underwent a major hardware upgrade. This consisted of new electronics and a new detector which increased our detection capabilities by more than 5 times. This means we are able to use lower count rates, which saves on machine time, yet yield better data with higher counts and lower signal to noise ratios.
Contact Rob Brown or Erik Brown regarding analytical services.