(Table, page 351-359) Chemical composition of manganese nodules and crusts from the Pacific and Indian Ocean


Chemical and mineralogical analyses of manganese nodules from a large number of widely spaced localities in the Pacific and Indian Oceans have shown that their mineralogy and chemical composition varies both areally and with depth of formation. This is considered to result from a number of factors, important among which are: (a) their proximity to continental or volcanic sources of elements; (b) the chemical environment of deposition, including the degree of oxygenation; and (c) local factors such as the upward migration of reduced manganese in sediments from certain areas. Sub-surface nodules appear to share the chemical characteristics of their surface counterparts, especially those from volcanic areas where sub-surface sources of elements are probably important.

The samples were crushed by hand, ground to a fine powder and heated to 850°C.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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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: Cronan, David S; Tooms, J S (1969): The geochemistry of manganese nodules and associated pelagic deposits from the Pacific and Indian Oceans. Deep Sea Research and Oceanographic Abstracts, 16(4), 335-359

DOI https://doi.org/10.1594/PANGAEA.861378
Related Identifier IsSupplementTo https://doi.org/10.1016/0011-7471(69)90003-5
Related Identifier References https://doi.org/10.1594/PANGAEA.861848
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.861378
Creator Cronan, David S; Tooms, J S
Publisher PANGAEA
Publication Year 1969
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 2463 data points
Discipline Earth System Research
Spatial Coverage (-83.117W, -44.383S, 51.900E, 40.500N); Pacific Ocean; Indian Ocean; Central Pacific; North-East Pacific Ocean
Temporal Coverage Begin 1874-03-13T00:00:00Z
Temporal Coverage End 1965-07-01T00:00:00Z