DBPapers
DOI: 10.5593/SGEM2014/B42/S19.054

INDICATION OF CLIMATIC CHANGES THROUGH THE INORGANIC COMPONENTS IN DIATOMS (HOVSGOL)

L. Pavlova, L. Tkachenko, A. Goreglyad, M. Kuzmin
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4 ,Vol. 2, 415-422 pp

ABSTRACT
Compositions of diatom valves have been for the first time obtained for the intervals of
their distribution in two sedimentary sampling depth using the EPMA technique
developed earlier. The investigations were performed using electron microscopes
Quanta and microprobe JXA8200. The comparison of the inorganic element
concentrations suggested some regular features in the change of diatom valve
composition throughout the sampling depth. The sampling intervals which contain
poorly-preserved valves show higher carbon and lower SiO2 contents. The comparison
with the literary spore-pollen analysis exhibits the correlation between steppe/forest
interface and areas with high and low SiO2 content. Such correlation cannot be random
and most likely indicates the prospects of using this procedure. The obtained data can be used as indicators of climatic changes at certain periods of diatoms’ life (cold or warm).

Keywords: diatom algae valves, microprobe, climate, Hovsgol, Baikal