Use of magnetic susceptibility of forest soils for imission mapping in the Krkonoše National Park

Deep soil profiles were investigated in the region of the Krkonoše National Park. Magnetic susceptibility, thermomagnetic analysis, acquisition of remanent magnetisation and hysteresis curves were measured in laboratory on samples from individual soil horizons. The uppermost layer, characterized by enhanced value of magnetic susceptibility, can be reliably identified in all profiles

Magnetic susceptibility of peat-bogs as indicator of immissions in Czech and Polish parts of the Giant Mountains

Recently, rapid and inexpensive (proxy) methods of outlining areas exposed to increased pollution by atmospheric particulates of industrial origin have been developed by scientists in various fields. One of them, soil magnetometry, seems to be a suitable tool, at least in some cases. This method is based on the knowledge that ferrimagnetic particles are deposited in top soil layers

Detailed map of magnetic susceptibility of topsoils in the KRNAP region and correlation with heavy metals

This report presents detailed map of magnetic susceptibility of topsoils in the KRNAP region, its vertical distribution, and correlation with heavy metals. The data contribute to identification of local sources of pollution and delimitation of their impact

Využití magnetické susceptibility lesních půd pro mapování imisní zátěže v regionu KRNAP =Use of magnetic susceptibility of forest soils for imission mapping in the Krkonoše National Park

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Methodology for evaluating the soil properties by using magnetic susceptibility , applicable for the assessment of soil degradation due to water erosion

This work has been supported by the Ministry of Agriculture of the Czech Republic (Project No. QJ1230319, “Soil water regime within a sloping agricultural area”). The goal was to propose methodology for using the soil magnetic parameters for accessing soil properties and their spatial distribution within agricultural areas affected by water erosion. Methodology includes: choice of sampling design for target area (optimized based on other auxiliary data) and soil sampling (topsoil), soil sample processing (drying, grinding, sieving, etc.), method of magnetic susceptibility measurements (using Bartington MS2 and Kappametr SM400) and procedure to calibrate models of predicting soil properties from soil magnetic properties. Prediction of the oxidable organic carbon from the mass specific magnetic susceptibility determined in the laboratory is shown here as an example of practical application of this methodology for soil properties assessment in certain soil types. In addition close correlation between volume magnetic susceptibility measured directly in the field and mass specific magnetic susceptibility obtained in the laboratory documents that the oxidable organic carbon may be estimated directly from the field measurements

Effect of plastic deformation in laboratory conditions on magnetic anisotropy of sedimentary rocks

In order to correlate the degree of plastic deformation and low-field magnetic anisotropy, a series of laboratory pressure experiments were carried out on a batch of grey marls. Samples were gradually deformed using triaxial high-pressure device. The confining pressure of 300 MPa was used, yielding maximum relative deformation up to 20% depending upon the uniaxial differential stress. In the range of initial deformation, irregular changes of the anisotropy parameters were typically observed. This effect is related to variable pre-deformation orientation of the anisotropy ellipsoid in the samples. At higher deformation, samples are characterized by increasing degree of magnetic anisotropy and by increasing foliation. Reorientation of paramagnetic phyllosilicate grains due to plastic deformation seems to be the most probable mechanism of the magnetic anisotropy changes