Goddard, D A; Thompson, G; Jones, E J W; Okada, H (1987): Description and chemical composition of ferromanganese encrustations and deposits in the Atlantic Ocean from R/V Atlantis II cruises 20, 42, 60, 85; R/V Chain cruise 35; R/V Knorr cruise 61 and RRS Shackleton cruise 75/1 stations [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.856659, Supplement to: Goddard, DA et al. (1987): The chemistry and mineralogy of ferromanganese encrustations on rocks from the Sierra Leone Rise, equatorial Mid-Atlantic Ridge and New England Seamount Chain. Marine Geology, 77(1-2), 87-98, https://doi.org/10.1016/0025-3227(87)90084-3
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Abstract:
Chemical and mineralogical compositions of ferromanganese oxide coatings on rocks dredged from the New England Seamounts, the Sierra Leone Rise and the Mid-Atlantic Ridge near the Equator have been determined in an investigation of regional differences in Atlantic ferromanganese deposits. Most encrustations are clearly of hydrogenous origin, consisting mainly of todorokite and delta MnO2, but several recovered from the equatorial fracture zones may be hydrothermal accumulations. Differences in the chemistry of the water column and in growth rates of the ferromanganese coatings may be important in producing this regional contrast in composition. Fine-scale changes in element abundances within the encrustations indicate that the nature of the substrate has little influence on compositional variations.
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: 14.063520 * Median Longitude: -34.680854 * South-bound Latitude: -4.133000 * West-bound Longitude: -67.373000 * North-bound Latitude: 39.860000 * East-bound Longitude: -11.050000
Date/Time Start: 1963-04-14T00:00:00 * Date/Time End: 1976-11-13T00:00:00
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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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.
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Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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Datasets listed in this publication series
- Goddard, DA; Thompson, G; Jones, EJW et al. (1987): Annotated record of the detailed examination of Mn deposits in the Atlantic Ocean from R/V Atlantis II cruises 20, 42, 60, 85; R/V Chain cruise 35; R/V Knorr cruise 61 and RRS Shackleton cruise 75/1 stations. https://doi.org/10.1594/PANGAEA.856652
- Goddard, DA; Thompson, G; Jones, EJW et al. (1987): (Table 1, page 89) Chemical composition of bulk ferromanganese encrustations on rocks from the Sierra Leone Rise. https://doi.org/10.1594/PANGAEA.856654
- Goddard, DA; Thompson, G; Jones, EJW et al. (1987): (Table 2, page 90) Chemical composition of bulk ferromanganese encrustations on rocks from the New England Seamounts. https://doi.org/10.1594/PANGAEA.856655
- Goddard, DA; Thompson, G; Jones, EJW et al. (1987): (Table 3, page 92-93) Chemical composition of bulk ferromanganese oxide deposits from the equatorial zone of the Mid-Atlantic Ridge. https://doi.org/10.1594/PANGAEA.856657
- Goddard, DA; Thompson, G; Jones, EJW et al. (1987): (Table 4, page 94) Chemical composition of ferromanganese encrustations from the Equatorial Atlantic. https://doi.org/10.1594/PANGAEA.856658