(Table 1, page 168) Iron, manganese, and phosphorus concentrations in Fe-Mn-concretions from the Gulf of Bothnia, northern Baltic Sea

DOI

Fe-Mn-concretions of a spheroidal type were found according to electron probe determinations to consist of alternating iron- and manganese-rich layers. This pattern was ascribed to seasonal variations in the physico-chemical conditions governing the precipitation of the hydrous oxides of iron and manganese. Calculations based on the rhythmic growth of the concretions investigated gave a mean accumulation rate of 0.15-0.20 mm/yr. The rather high phosphorus content (average 3.5 % P2O5) of the concretions was found to be concentrated in the iron-rich layers, probably as a result of the scavenging effect of ferric hydroxide.

Percentages are on a dry weight basis.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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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: Winterhalter, Boris; Siivola, Jaakko (1967): An electron microprobe study of the distribution of iron, manganese, and phosphorus in concretions from the Gulf of Bothnia, northern Baltic Sea. Comptes Rendus de la Société Géologique de Finlande, 39, 161-172

Identifier
DOI https://doi.org/10.1594/PANGAEA.856766
Related Identifier IsSupplementTo https://www.geologinenseura.fi/sites/geologinenseura.fi/files/bt_229.pdf
Related Identifier IsDerivedFrom https://doi.org/10.7289/V52Z13FT
Related Identifier IsDocumentedBy 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.856766
Provenance
Creator Winterhalter, Boris; Siivola, Jaakko
Publisher PANGAEA
Publication Year 1967
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 60 data points
Discipline Chemistry; Natural Sciences
Spatial Coverage (19.267W, 61.467S, 23.350E, 65.067N); Baltic Sea
Temporal Coverage Begin 1958-01-01T00:00:00Z
Temporal Coverage End 1963-06-26T00:00:00Z