Addy, Sunit Kumar (2022): Rare earth element composition of manganese nodules and micronodules from the northwest Atlantic [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.943839
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Abstract:
The shale-normalized REE patterns of manganese nodules from the northwest Atlantic show enrichment in Sm and Eu relative to the heavier and lighter REE, excluding Ce, and are similar to the patterns previously observed in deep water (> 3000m) nodules from the Pacific. The inverse relation of this pattern to that of sea water and the high Ce anomaly (average 5.5) indicate that probably the REE in the nodules originate from sea water and the nodules are possibly hydrogenous. The patterns for micronodules are similar to those of the nodules but the concentrations of REE were substantially higher in two of them. The red clay occurring on abyssal hills where nodules and micronodules are found also shows higher REE concentrations over terrigenous gray clay. The latter is devoid of nodules and micronodules and occurs in abyssal plains. The excess REE in the red clay also show a pattern similar to those of the nodules and micronodules. Most of the micronodule samples show a lower Ce anomaly (1.7) and lower Co concentration compared to the nodules, so it is inferred that at least some micronodules were formed during post-depositional periods when the conditions were less oxidizing than average.
Related to:
Addy, Sunit Kumar (1979): Rare earth element patterns in manganese nodules and micronodules from northwest Atlantic. Geochimica et Cosmochimica Acta, 43(7), 1105-1115, https://doi.org/10.1016/0016-7037(79)90097-8
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: 27.006320 * Median Longitude: -43.579043 * South-bound Latitude: 22.120000 * West-bound Longitude: -64.500000 * North-bound Latitude: 29.246700 * East-bound Longitude: 60.667000
Date/Time Start: 1973-08-12T00:00:00 * Date/Time End: 1973-09-02T00:00:00
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:
3 datasets
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Datasets listed in this bundled publication
- Addy, SK (2022): Rare-earth and major elements concentration in manganese nodules from the Northwest Atlantic. https://doi.org/10.1594/PANGAEA.943836
- Addy, SK (2022): Rare-earth and major elements concentration in manganese micronodules nodules from the sediments of the Northwest Atlantic. https://doi.org/10.1594/PANGAEA.943837
- Addy, SK (2022): Rare-earth and major elements concentration in sediments of the Northwest Atlantic. https://doi.org/10.1594/PANGAEA.943838