(Fig 2, page 399), Distribution of Fe and Mn in ferromanganese nodules of the Eningi-Lampi Lake, Russia

The distribution of Mn and Fe in water, sediments, hydroxide nodules and crusts of Eningi-Lampi ore-bearing lake is regular, and concordant from the source to the areas of accumulation of these components. Mn-Fe hydroxide nodules and crusts occur at the water-sediment interface, and more rarely in the upper (0-5 cm) film of brown watery mud. The leading role in the formation of Mn-Fe nodules and crusts is played by the chemosorption and auto-catalytic oxidation in the course of interaction of component-bearing solutions with active surfaces. This is considered to be the basic process for the model of ferromanganese ore formation in recent basins. Despite the differences in the physico-geographical and geochemical characteristics of lakes, mediterranean seas and oceans, the formation of ferromanganese hydroxide nodules and crusts in these basins may be explained by this model.

Only the Fe-Mn rich parts of the nodules have been analysed excluding their foreign cores.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.

Supplement to: Varentsov, Igor M (1972): On the main aspects of formation of ferromanganese ores in recent basins (lakes). In: Proc. 24th Intl. Geol. Congr., presented at the Mineral Deposits Symposium, 24th International Geological Congress (Montreal), Sect 4, 395-403

Identifier
DOI https://doi.org/10.1594/PANGAEA.855186
PID https://hdl.handle.net/10013/epic.46330.d001
Related Identifier https://doi.org/10.7289/V52Z13FT
Related Identifier https://hdl.handle.net/10013/epic.46330.d002
Related Identifier https://hdl.handle.net/10013/epic.46330.d003
Related Identifier https://hdl.handle.net/10013/epic.46330.d004
Related Identifier https://doi.org/10.7289/V53X84KN
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.855186
Provenance
Creator Varentsov, Igor M; Michailova, R M
Publisher PANGAEA
Publication Year 1972
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 34 data points
Discipline Earth System Research
Spatial Coverage (33.190W, 63.070S, 33.267E, 63.119N); Lake Eningi-Lampi, Russia