Fewkes, Ronald H (1976): Description and chemical analysis of manganese nodules from the Pacific Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.879754, Supplement to: Fewkes, RH (1976): Electron probe microanalysis of manganese nodules. Washington State University, 71 pp, Fewkes_1976.pdf
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Abstract:
Analyses of small samples extracted from different parts of a single manganese nodule have been reported by several investigators, clearly documenting the belief that a nodule is not homogeneous chemically, as a rule. The same sort of evidence has been gathered by use of the X-ray macroprobe and electron microprobe analyses. The X-ray probe work has shown clearly that chemical variations within a nodule can be correlated with optically recognizable mineral,and therefore optical study can tell much about chemical variations and obviate much probe analysis. As we have reported many times, optically anisotropic crystalline todorokite and birnessite contain the bulk of the Mn, Ni, and Cu in any nodule whereas optically isotropic and X-ray amorphous oxides contain most of the Fe and Co in the same nodule.
Source:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Project(s):
Coverage:
Median Latitude: 7.506850 * Median Longitude: -133.921494 * South-bound Latitude: -15.000000 * West-bound Longitude: -160.000000 * North-bound Latitude: 30.000000 * East-bound Longitude: -90.000000
Date/Time Start: 1970-01-01T00:00:00 * Date/Time End: 1974-07-28T00:00:00
Comment:
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Fewkes, RH (1976): Bulk chemical analysis of manganese nodules from the Pacific Ocean. https://doi.org/10.1594/PANGAEA.879751
- Fewkes, RH (1976): Annotated record of the detailed examination of Mn deposits from the Pacific Ocean. https://doi.org/10.1594/PANGAEA.879752
- Fewkes, RH (1976): X-ray microprobe analysis of manganese nodules from the Pacific Ocean. https://doi.org/10.1594/PANGAEA.879753