Rare-earth and major elements concentration in sediments of the Northwest Atlantic ...

• Main Author: Addy, Sunit Kumar
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Geochemistry; FOS Earth and related environmental sciences; manganese micronodule; manganese nodule; ocean; sediment; Event label; Latitude of event; Longitude of event; Elevation of event; Device type; Identification; DEPTH, sediment/rock; Depth, top/min; Depth, bottom/max; Manganese; Iron; Copper; Nickel; Cobalt; Lanthanum; Cerium; Samarium; Europium; Terbium; Ytterbium; Lutetium; Illite; Kaolinite; Montmorillonite; Chlorite; Comment; Deposit type; Description; Box corer; Piston corer; Atomic absorption spectrometry AAS; Instrumental neutron activation analysis INAA; X-ray diffraction XRD; RC16; Robert Conrad; NOAA and MMS Marine Minerals Geochemical Database NOAA-MMS; Pacific; Northwest Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.943838; https://doi.pangaea.de/10.1594/PANGAEA.943838

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 ... : Digitized Table 3, page 1110-1111; Composition is given in an acid insoluble free and carbonate free basis.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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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. ...