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Meylan, Maurice A (2022): Morphology and chemical composition of ferromanganese deposits in the Southwestern Pacific Basin [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.948458

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Published: 2022-09-19 • DOI registered: 2022-11-09

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Abstract:
An extensive field of iron-rich, nickel- and copper-poor manganese nodules covers the deep sea-floor of the northeastern quadrant of the Southwestern Pacific Basin, and the eastern side of the Samoan Basin. The nodule field has a relatively well-defined western boundary, the location of which is determined by differences in sedimentation regimes. Immediately east of the Tonga-Kermadec volcanic arc and New Zealand, as well as around Rarotonga (Cook Islands) and the Samoan chain, rapid accumulation of volcanic ash and microfossils has buried potential nodule nuclei before significant ferromanganese oxide encrustation could occur. Further east, where sedimentation rates are lower, the nodule field has developed. The nodules occur almost exclusively on medium to dark brown silty clays which contain a significant proportion (5-15%) of red-brown semi-opaque oxides (RSO's). The brown silty clays consist principally of phyllosilicates (illite, montmorillonite, chlorite and kaolinite) plus subsidiary quartz and feldspar. Microfossils are generally rare, but all of the brown silty clays contain trace quantities of calcareous nannofossils.
Keyword(s):
Geochemistry; manganese micronodule; manganese nodule; ocean; sediment
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):
NOAA and MMS Marine Minerals Geochemical Database (NOAA-MMS)
Coverage:
Median Latitude: -21.378863 * Median Longitude: -161.193030 * South-bound Latitude: -40.670000 * West-bound Longitude: -174.810000 * North-bound Latitude: -11.500000 * East-bound Longitude: -144.367000
Date/Time Start: 1964-02-15T00:00:00 * Date/Time End: 1976-06-07T00:00:00
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 4.0 International (CC-BY-4.0)
Size:
5 datasets

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Datasets listed in this bundled publication

  1. Meylan, MA (2022): Chemical composition of Southwestern Pacific Ocean surface sediments (Expedition NZOI-Tangaroa_22 and MANGANESE 76, R/V Tangaroa). https://doi.org/10.1594/PANGAEA.948418
  2. Meylan, MA (2022): Morphology of Mn nodule samples from the Southwestern Pacific Ocean (Expedition MANGANESE 76, R/V Tangaroa). https://doi.org/10.1594/PANGAEA.948419
  3. Meylan, MA (2022): Bulk chemical composition of Southwestern Pacific Ocean manganese nodules (Expedition NZOI-Tangaroa_22 and MANGANESE 76, R/V Tangaroa). https://doi.org/10.1594/PANGAEA.948420
  4. Meylan, MA (2022): Kennecott Standard GRLD-126 manganese nodule replicate Atomic absorption spectrophotometry (AAS) analyses. https://doi.org/10.1594/PANGAEA.948422
  5. Meylan, MA (2022): Chemical composition of selected manganese nodule and ferromanganese crust structure zones and morphology types (Expedition NZOI-Tangaroa_22 and MANGANESE 76, R/V Tangaroa). https://doi.org/10.1594/PANGAEA.948421