The effects of particle breakage and abrasion on the magnetic properties of two soils

✍ Scribed by R. H. Crockford; J. M. Olley

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 153 KB
• Volume: 12
• Category: Article
• ISSN: 0885-6087
• DOI: 10.1002/(sici)1099-1085(199807)12:9<1495::aid-hyp652>3.0.co;2-m

✦ Synopsis

As mineral magnetism is used as a tracer for sourcing river and dam sediments, changes in the magnetic properties that may occur during transport between the source and sink must be considered. Abrasion and breakage of particles will occur during transport. These processes were examined in simulation experiments with a granitic and a sedimentary soil. The eects of these processes on the magnetic properties of a granitic and a sedimentary soil were examined using a simulated breakage/abrasion experiment. Breakage and/or abrasion had substantial eects on the magnetic properties of both soils. All particle sizes were aected, but the magnitude varied through the size range of derived particles. The major eect was on the concentration of magnetic minerals, with dierences between the concentrations in particle sizes of the original material and those generated by the experiments being as much as 20 times. The eect on the granite soil was to reduce the concentrations, i.e. derived material was less than original material; whereas for the sedimentary soil the derived particles had higher concentrations. The eect on magnetic grain size, as indicated by the magnetic ratios, was less than the eect on the mass magnetic properties, but still substantial for some ratios for some sizes.