Paleoclimatology

One main application of the Itrax Corescanner is paleoclimatic reconstructions based on data from sediment cores. Element information from the XRF analyses offers proxies for a wide range of parameters, including e.g. seasonal changes, oxic/anoxic conditions, amount of shell/foraminifera, grain size related effects, tephra, shallow water aragonite source, sediment grading, redox related diagenesis, biogenic silica, etc. in marine as well as limnological environment. Furthermore, it includes provenance studies, laminations counting, reconstruction of past lake conductivity, and estimations of past productivity, weathering, cyclone frequency, leaching and erosion intensities. The x-ray radiography that also is a part of the Itrax Core Scanner provides important, complementary information to the XRF. In lakes, yearly and even seasonal changes including temperature estimates can be traced. Itrax Core Scanner is found at the major climate research institutes. Many research project, large and small, are currently running, involving high resolution scanning of core material. These projects aim at tracing changes on a seasonal or yearly scale for every year from today and back in time, sometimes thousands of years. Such projects include the Lake El´gygytgyn project, the SCOPSCO project of lake Ohrid, and many others where the Itrax XRF Corescanner is applied. Several hundreds of scientific articles containing Itrax data have been published, and more than 100 are added to the list every year. More information on some of these projects can be found under Articles in the main menu.
This photo shows a 90 millimeter long section of a sediment core. Overlaid in the center of the photo is a x-ray radiograph image of the corresponding sample section. Superimposed on the image are shown element profiles of Potassium (K, red) and Arsenic (Sr, blue). These element profiles serve as examples of the wide range of elements that can be registered with high precision, even at high resolution and in only 1-3 seconds per point. All data were recorded with Itrax Corescanner. The element data have an analytical resolution of 200 micrometers. Please note the fine structures in this laminated samples. The radiograph image confirms the existence and position of each layer, and can also verify element migration when that occurs. The sample width is 100 millimeters, while the width of the radiographic image is 20 millimeters. Data by courtesy of professor Michael Strasser, University of Innsbruck.