Solid phase partitioning of elements in ESOPE core 48 from the South Nares Abyssal Plain in the North Atlantic
The results from two independent research groups on the solid phase partitioning of a series of elements in ESOPE core 48 are discussed. Two different schemes of sequential extraction were used to extract a variety of fractions including "carbonate", "easily reducible" and "detrital" phases. The general nature of the results is described, concentrating mainly on those features common to both groups. Particular attention is given to the relationships between the partitioning of elements and lithology, pore water chemistry (especially around the redox boundary) and depth in the core for diagenetic controls. The partitioning results are found to be qualitatively comparable for all the major trends observed. The transition metal partitioning is not found to relate to available data on sedimentological characteristics. Metal enrichment of the surface sediments, caused by the redox regime, is shown to be associated with the "easily reducible" phases of the sediment, whilst deeper, in the mildly reducing zone, "carbonate" phase associations of manganese appear to be more important. In the less exchangeable phases of the sediment there are indications that a phase of low solubility is slowly growing, which is particularly associated with manganese and could be explained by diagenetic mineral formation.
Bibliographic Reference: Article: Geoscience Investigations of Two North Atlantic Abyssal Plains: The ESOPE International Cruise, Vol. 2 (1989) pp. 877-912
Record Number: 199011122 / Last updated on: 1994-12-01
Original language: en
Available languages: en