Sources of the Paleomagnetic Signal in Iron-Rich Marine Sedimentary Rocks
- Autores: Rudmin M.1, Mazurov A.1, Sergienko V.2, Savichev O.1, Semiletov I.2,1
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Afiliações:
- Tomsk National Research Polytechnic University
- Il’ichev Pacific Oceanological Institute, Far-East Branch, Russian Academy of Sciences
- Edição: Volume 486, Nº 1 (2019)
- Páginas: 122-125
- Seção: Chemistry
- URL: https://journals.rcsi.science/0012-5008/article/view/154426
- DOI: https://doi.org/10.1134/S0012500819050021
- ID: 154426
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Resumo
In this work, the results of interpreting the variation of the magnetic signal of iron-rich marine sedimentary rocks were presented by the example of the Cretaceous–Paleogene section of the Bakchar iron ore deposit (Western Siberia). The anomalous values of the magnetic susceptibility are determined by two factors: first, a superimposed diagenetic process accompanied by the formation of pyrrhotite, greigite, and siderite among ooidal ironstones; and second, an increase in the continental runoff, causing the accumulation of terrigenous magnetite and ilmenite in the siltstone as the climate becomes increasingly humid and the weathering intensifies. It was shown that the elevated values of the magnetic susceptibility in iron-rich deposits can be due to the formation of ferrimagnetic iron sulfides, which is indicative of methane mobilization through ancient bottom sediments.
Sobre autores
M. Rudmin
Tomsk National Research Polytechnic University
Autor responsável pela correspondência
Email: rudminma@tpu.ru
Rússia,
Tomsk, 634050
A. Mazurov
Tomsk National Research Polytechnic University
Email: rudminma@tpu.ru
Rússia,
Tomsk, 634050
V. Sergienko
Il’ichev Pacific Oceanological Institute, Far-East Branch, Russian Academy of Sciences
Email: rudminma@tpu.ru
Rússia, Vladivostok, 690041
O. Savichev
Tomsk National Research Polytechnic University
Email: rudminma@tpu.ru
Rússia,
Tomsk, 634050
I. Semiletov
Il’ichev Pacific Oceanological Institute, Far-East Branch, Russian Academy of Sciences; Tomsk National Research Polytechnic University
Email: rudminma@tpu.ru
Rússia, Vladivostok, 690041;
Tomsk, 634050