Abstract:
The domain state of magnetite detected in sediments of Shira lake (Khakassia, Russia) was examined by means of magnetic hysteresis. Analysis of experimental data obtained on samples from different parts of bottom sediment cores in terms of Day plots allowed us to conclude that magnetite particles are in the pseudo-single-domain state. This indicates respectively small size of magnetite particles (<100 nm) and reveals their bacterial origin. Biogenic magnetite buried in the bottom sediments can indicate the climatic changes in the Shira lake level in the Late Holocene.
Keywords:
nanoparticles, magnetic hysteresis, bacterial magnetite.
The work was supported by Russian Foundation for Basic Research and Krasnoyarsk Regional Scientific Foundation, Grant no. 15-45-04272 and partially supported by the Council on grants from the President of the Russian Federation for support of leading scientific schools (grant NSh-9249.2016.5).
Received: 10.08.2016 Received in revised form: 10.11.2016 Accepted: 20.01.2017
Bibliographic databases:
Document Type:
Article
UDC:
538.9
Language: English
Citation:
Sergey V. Semenov, Dmitry A. Balaev, Kirill A. Shaykhutdinov, Denis Yu. Rogozin, “Day plots of bacterial magnetite from sediments of Shira lake (Khakassia, Russia)”, J. Sib. Fed. Univ. Math. Phys., 10:2 (2017), 252–256