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DOI: 10.5593/SGEM2016/HB33/S02.038

TECHNOGENIC MAGNETIC SPHERULES

E.A. Menshikova, B.M. Osovetsky
Friday 11 November 2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, SGEM Vienna GREEN Extended Scientific Sessions, www.sgemviennagreen.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-81-0 / ISSN 1314-2704, 2 - 5 November, 2016, Book 3 Vol. 3, 295-302pp, DOI: 10.5593/SGEM2016/HB33/S02.038

ABSTRACT

The authors present the results of their study of technogenic magnetic spherules found in alluvial sediments in industrial centres of the Urals (Russia). Electron microscopy of such spherules reveals their morphological diversity. There are ideal spheres and sphere-shaped particles with smooth surface, irregular grains with rough surface, complex forms composed of several small round particles and slag with magnetic spherules, spheres with empty cores, transformed varieties with products of magnetite dissolution, etc. The chemical composition of the spherules is identified by spectral and microprobe analyses, revealing ferriferous (magnetite), silicon-ferriferous (magnetite and silicates) and silicon (silicate minerals with magnetite) spherules with admixtures of Ti, Zn, Cu, As, V, etc. Magnetic spherules may be used in the lithomonitoring procedure as indicators of technogenic pollution of sediments and soils near industrial enterprises. Magnetic spherules gradually change and dissolve in sediments and soils setting free technogenic ferroxides, which absorb different metals including toxic ones. In the Urals region, magnetic spherules contain such toxic elements as Zn, Cu, Ni, Co, As, Sb. Special studies have shown that such elements concentrate in secondary products.

Keywords: technogenic magnetic spherules, the Urals (Russia), electron microscopy, microprobe analysis, ecology.

PAPER DOI: 10.5593/SGEM2016/HB33/S02.038, TECHNOGENIC MAGNETIC SPHERULES

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