Fluvial Transport of Magnetominerals
Duration: since 2003, first results published in 2011
Project leader: Michael Pirrung
Cooperationpartner: Jörn Engelhardt, Geoplan Ingenieure Dr. Köhler GmbH, Kantstr. 2, 04275 Leipzig
Beschreibung: Magnetic susceptibility is a widely used petrophysical parameter in geosciences. Here it is applied to detect ferrimagnetic components in creek and river sediments that reflect actual aspects of weathering, soil formation, erosion, transport and deposition. As in many environmental considerations the amount of natural versus anthropogenic components has to be estimated to appreciate human impact on the drainage system. Therefore a lot of samples of source rocks is collected in Central Europe and magnetic susceptibility is determined on these samples in order to establish typical geogenic background values. Additional samples of artificial rocks, spider webs and dust collectors help to estimate the influence of anthropogenic material on fluvial sediments. For the latter, the fine and coarse fractions show different transport dynamics and have to be regarded individually. Identification of magnetominerals is achieved by microscopy of extracted material and by thermomagnetic measurements.
Preliminary results: Results and summaries are available online in several articles on the project website.