The solid state speciation of copper in surface water particulates and oceanic sediments

Chester, R.; Thomas, Alain; Lin, Fei-Jan; Basaham, Ali S.; Jacinto, Gil S.

doi:10.1016/0304-4203(88)90036-9

Cited by 65 publications

(17 citation statements)

References 24 publications

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“…In the MAP sediments, Cu is delivered by organic-rich turbidites that inherited their Cu-organic complexes content from the shelf sediments (CHESTER et al, 1988). Consequently, the organic carrier survives destruction at the sediment-water interface.…”

Section: Formation Of Front Type-2mentioning

confidence: 99%

“…These profiles are explained by the degradation of the organic-Cu carrier during early diagenesis; this results in a release of Cu into the bottom-water (e.g. HEATH and DYMOND, 1977;HEIN et aI., 1979 and BOWSER, 1980;ELDERFIELD, 1981;KLINKHAMMER et al, 1982;GRAYBEAL and HEATH, 1984;LYLE et al, 1984;PEDERSEN et al, 1986;HEGGIE et al, 1987;CHESTER et al, 1988;SHAW et al, 1990). Manganese pore-water concentrations often show an increase with depth (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of thin, metal-rich layers in deep-sea sediments: a geochemical characterization of copper remobilization

Visser

Middelburg

et al. 1993

Deep Sea Research Part I: Oceanographic Research Papers

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Abstract-Distinctly coloured trace metal enriched fronts with a six-fold Cu-enrichment occur in the interbedded pelagic-turbiditic sediments from the Madeira Abyssal Plain. To decipher their mode of formation. two sequential extraction techniques, an acid-gradient and a "Tessier-type" scheme, were applied. Two different front types could be distinguished: Type-l fronts are mostly black and enriched in Co, Zn, Ni and Cu, and associated with the oxidation fronts that developed after deposition of turbidites. Type-2 fronts are purple, extremely enriched in Cu, and associated with sulphur. These fronts are sometimes found in relation with a relict oxidation front, but often show no clear relation with lithology. Two different modes of formation are postulated. (1) The transition-metal enrichment in the type-l fronts is typical for a manganese-oxide association often found in marine sediments. After the dissolution of manganese-oxide during sub-oxic diagenesis, the transition metals were liberated and subsequently relocated and precipitated in response to a redox-gradient. (2) The Cu-S association in type-2 fronts is also formed during sub-oxic diagenesis. The main process leading to the formation of this Cu-S enrichment is the mobilization of inherited Cu-S compounds from organic-rich turbidites. The accumulation of these compounds is possibly related to redox changes at relict oxidation fronts and to gradual. probably slowly evolving. redox changes that occur at present.

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Section: Formation Of Front Type-2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Occurrence of thin, metal-rich layers in deep-sea sediments: a geochemical characterization of copper remobilization

Visser

Middelburg

et al. 1993

Deep Sea Research Part I: Oceanographic Research Papers

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“…Diagenetic enrichment of Mn in sediments usually occurs in areas of high biological productivity where organic input to the sediments is high (e.g., in the Northeastern Pacific; [24,45]). Cu chemistry in the ocean seems to be substantially influenced, and often dominated, by organic complexation [46,47]. The sedimentary distribution of Ba, an element known to be associated with biogenic opal [48], has been proposed as a paleoproductivity indicator [e.g., 49,50].…”

Section: Factors Influencing Scavengingmentioning

confidence: 99%

Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period

Lao

Anderson

Broecker

et al. 1992

Earth and Planetary Science Letters

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“…Hence the results of the sequential extractions need to be treated with caution. Despite these limitations, the method has value in comparison studies where relative rather than absolute differences are of interest, such as comparing changes in sediment composition over distances (Chester et al 1988) or through time (Gerringa 1990).…”

Section: Methodsmentioning

confidence: 99%

Trace metal partitioning in bioturbated, contaminated, surficial sediments from Mangere Inlet, New Zealand

Williamson

Mol‐Krijnen

Dam

1995

New Zealand Journal of Marine and Freshwater Research

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Diagenesis and its effects on the partitioning of trace metals was examined in intertidal muddy sediments in polluted Mangere Inlet, Manukau Harbour, New Zealand. Two cores were sectioned down to 26 cm, and analysed for compounds of Fe, Mn, S, and organic matter. Trace metals were analysed by sequential extraction (nonresidual metals), 0.5M HCl, and XRF (total metals). The sediments were bioturbated, with strong mottling of sediment colour in both cores and intact macropores in one core. Bioturbation appeared to affect sediment chemistry and to cause differences between the cores. There were changes in trace metal partitioning in the non-residual phases with depth, but the changes were relatively small, in line with the changes in major sediment phases. None of the trace metals showed an increase in the lithogenic fraction with depth and we concluded that immobilisation of trace metals by incorporation into residual phases is not an important mechanism in the surface sediments.

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The solid state speciation of copper in surface water particulates and oceanic sediments

Cited by 65 publications

References 24 publications

Occurrence of thin, metal-rich layers in deep-sea sediments: a geochemical characterization of copper remobilization

Occurrence of thin, metal-rich layers in deep-sea sediments: a geochemical characterization of copper remobilization

Transport and burial rates of10Be and231Pa in the Pacific Ocean during the Holocene period

Trace metal partitioning in bioturbated, contaminated, surficial sediments from Mangere Inlet, New Zealand

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