Sources of the Paleomagnetic Signal in Iron-Rich Marine Sedimentary Rocks

Autor:	Maxim Rudmin, Igor Semiletov, Alexey Mazurov, O. G. Savichev, V. I. Sergienko
Rok vydání:	2019
Předmět:	Greigite Paleomagnetism 010405 organic chemistry Terrigenous sediment Geochemistry General Chemistry engineering.material 010402 general chemistry 01 natural sciences 0104 chemical sciences Diagenesis Siderite chemistry.chemical_compound chemistry engineering Sedimentary rock Pyrrhotite Magnetite
Zdroj:	Doklady Chemistry. 486:122-125
ISSN:	1608-3113 0012-5008
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c3cb8416e8aae482ae97de67fb41fcbe https://doi.org/10.1134/s0012500819050021 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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