Magnetic normalization of particle size effects in a heavy metal pollution study of intertidal sediments from the Yangzte Estuary
- 46 Downloads
Magnetic, granulometric and geochemical analyses were conducted on an intertidal sediment core from the Yangtze Estuary to evaluate the possibility of normalizing samples for particle size effects in a heavy metal pollution study by means of magnetic proxies. It has been found that the magnetic parameterϰARM, indicating fine grained ferrimagnetic minerals, correlates well with the clay content and organic matter concentration of the sediments.ϰARM also shows significant relationship with heavy metals. ThereforeϰARM is proposed as a proxy for clay content in the sediments, and can be used to compensate for the particle size effect in sedimentary heavy metal records, where magnetic minerals are not subject to significant post-depositional alteration.
Keywordsparticle size heavy metals normalization magnetic proxy Yangtze Estuary
Unable to display preview. Download preview PDF.
- 1.Rae, J. E., Trace metals in deposited intertidal sediments, in Biogeochemistry of intertidal sediments (eds. Jickells, T. D., Rae, J. E.), Cambridge: Cambridge University Press, 1997, 16–31.Google Scholar
- 5.Jones, B. R., Laslett, R. E., Methods for analysis of trace metals in marine and other samples, Lowesofl: Directorate of Fisheries Research, MAFF, 1994, 20–209.Google Scholar
- 6.Institute of Soil Science, Chinese Academy of Sciences (ed.), Physical and Chemical Analysis of Soil, Shangai: Shanghai Science and Technology Press, 1978, 132–136.Google Scholar
- 7.Xu, S. Y., Tao, J., Chen, Z. L. et al., Dynamic accumulation of heavy metals in intertidal sediments of Shanghai, Oceanologia et Limnologia Sinica (in Chinese), 1997, 28: 509.Google Scholar
- 8.Thompson, R., Oldfield, F., Environmental Magnetism, London: George Allen & Unwin, 1986, 1–227.Google Scholar