Background Magnetic Component of Holocene Cosmic Dust Allocated from Peat

  • V. A. TselmovichEmail author
  • A. Yu. Kurazhkovskii
Conference paper
Part of the Springer Geophysics book series (SPRINGERGEOPHYS)


Cores taken from peat deposits were used to study the variations cosmogenic dust on the Earth’s surface. In accordance with the amount of cosmogenic dust in various layers of the peat deposits, the dust flux intensity was conventionally divided into low (background) and high (burst) by means of saturation remanence intensity. Further, the mineralogical composition of the background component of cosmic dust has been studied by energy dispersive scanning electron microscopy on magnetic separates. It was found that its composition is mainly limited to the presence of magnetite spherules and iron. In contrast, when bursts occur, cosmic dust consists of a wide range of metallic particles as well as particles containing carbon and silicon. Probably, the sources of background and cosmic matter bursts are different.


Cosmic dust Microprobe analysis Peat Native iron Magnetite Microsphere 



The work was carried out on the budget topic “Spatial-temporal structure of the ancient geomagnetic field and petrophysics of magnetic minerals as indicators of geological and geophysical processes State Registration No. AAAA-A17-117040610183-6”, Microprobe studies were carried out with the support of the Russian Foundation for Basic Research project No. 16-05-00703a.

We thank Simo Spassov for assistance in evaluating this paper.


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© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Borok Geophysical Observatory IPE RASBorok, Nekouzsky District, YaroslavlRussia

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