Major, trace and rare earth elements geochemistry of manganese nodules from the DOMES, Site A area in the Pacific Ocean, supplement to: Calvert, Stephen E; Piper, David Z; Baedecker, Philip A (1987): Geochemistry of the rare earth elements in ferromanganese nodules from DOMES Site A, northern equatorial Pacific. Geochimica et Cosmochimica Acta, 51(9), 2331-2338


The distribution of rare earth elements (REE) in ferromanganese nodules from DOMES Site A has been determined by instrumental neutron activation methods. The concentrations of the REE vary markedly. Low concentrations characterize samples from a depression (the valley), in which Quaternary sediments are thin or absent; high concentrations are found in samples from the surrounding abyssal hills (the highlands) where the Quaternary sediment section is relatively thick. Moreover, the valley nodules are strongly depleted in the light trivalent REE (LREE) and Ce compared with nodules from the highlands, some of the former showing negative Ce anomalies. The REE abundances in the nodules are strongly influenced by the REE abundances in coexisting bottom water. Some controls on the REE chemistry of bottom waters include: a) the more effective removal of the LREE relative to the HREE from seawater because of the greater degree of complexation of the latter elements with seawater ligands, b) the very efficient oxidative scavenging of Ce on particle surfaces in seawater, and c) the strong depletion of both Ce and the LREE in, or a larger benthic flux of the HREE into, the Antarctic Bottom Water (AABW) which flows through the valley. The distinctive REE chemistry of valley nodules is a function of their growth from geochemically evolved AABW. In contrast, the REE chemistry of highland nodules indicates growth from a local, less evolved seawater source.

Metadata Access
Creator Piper, David Z;Calvert, Stephen E;Baedecker, Philip A
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1987
Rights Creative Commons Attribution 3.0 Unported (CC-BY)
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Discipline Earth System Research
Spatial Coverage (9 N-10N,152W-151W)