Mineralogical criteria in the origin of marine iron-manganese nodules

Autor:	B. B. Zvyagin, F. V. Chukhrov, L. P. Yermilova, A. I. Gorshkov
Rok vydání:	1976
Předmět:	inorganic chemicals Geochemistry chemistry.chemical_element Mineralogy Manganese Pacific ocean Mineral resource classification Diagenesis Geophysics Iron bacteria chemistry Geochemistry and Petrology Economic Geology Seawater Oxidation process Geology Upward migration
Zdroj:	Mineralium Deposita. 11:24-32
ISSN:	1432-1866 0026-4598
DOI:	10.1007/bf00203092
Popis:	In iron-manganese nodules from the floor of Pacific ocean, Baltic, White Sea and Kara Sea, iron bydroxide δ'-FeOOH was analysed in the laboratory. In buried ooze, reduction processes generate Fe(HCO3)2 which migrates into the upper part of the bottom ooze and into near bottom sea water where Fe(OH)2 is formed. The oxidation process of Fe2+ to Fe3+, without participation of iron bacteria, leads to the topotactic transformation of Fe(OH)2 to δ'-FeOOH. Marine water does not contain Fe2+ and cannot be a direct source of iron deposited in the nodules. Discovery of δ'-FeOOH in marine nodules permits the consideration that both iron and manganese were derived from the buried bottom mud, which during diagenetic processes led to the transfer of these metals in solutions and their upward migration.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8fd5f6e3a6e9f78d333d435d93b7cee3 https://doi.org/10.1007/bf00203092 Zobrazit plný text záznamu Full text from SpringerLink