(Table 6, page 216) Electron microprobe analyses of ferromanganese nodules from Tomahawk Lake, Wisconsin


Oxide coatings on sediments, especially iron, are ubiquitous in the oxygenated environments of most lakes. Deposits of ferromanganese oxides are especially abundant in many lakes in the glaciated regions of North America and Europe. Iron and manganese is readily derived from weathering of mechanically ground, largely crystalline rock debris which is permeable and readily weathered under the humid coldtemperate climate and abundant vegetation. Crusts around pebbles and cobbles constitute much of the most concentrated lacustrine ferromanganese deposits yet reported: Oneida Lake, New York, and Lake Tomahawk, Wisconsin. Freshwater phases tend to be less crystalline than their marine counterparts, possibly a result of faster accretion rates and thus having less time for recrystallization. Electron probe analyses of iron and manganese phases from two nodules from Lake Tomahawk are presented.

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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: Jones, Blair F; Bowser, Carl J (1978): The mineralogy and related chemistry of lake sediments (Chapter 7). In: Lerman, A. (Ed) Lakes - Chemistry, Geology, Physics. Springer New York. ISBN: 978-1-4757-1154-7, 179-235

DOI https://doi.org/10.1594/PANGAEA.855351
Related Identifier https://doi.org/10.1007/978-1-4757-1152-3_7
Related Identifier https://doi.org/10.7289/V52Z13FT
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.855351
Creator Jones, Blair F; Bowser, Carl J
Publisher PANGAEA
Publication Year 1977
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 36 data points
Discipline Earth System Research
Spatial Coverage (-89.642 LON, 45.819 LAT); Lake Tomahawk, Wisconsin, USA