Metal diagenesis in oxic marine sediments

Klinkhammer, Gary P.; Heggie, David T.; Graham, David W.

doi:10.1016/0012-821x(82)90054-1

Cited by 208 publications

(85 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Our data indicate that the accumulation rates of these elements in Southwestern Pacific Basin sediments are similar to those obtained by Krishnaswami (1976). It should be noted that these element ac cumulation rates are orders of magnitude higher than the diffusive flux of metals through pore wa ter in red clays (Klinkhammer et al ., 1982;Sawlan and Murray, 1983;Chester, 1990;Glasby , 1991).…”

Section: Element Accumulation Ratessupporting

confidence: 85%

Metal accumulation rates in sediments from the Southwestern Pacific Basin.

Schmitz

Glasby

Stoffers³

et al. 1999

Geochem. J.

View full text Add to dashboard Cite

Section: Element Accumulation Ratessupporting

confidence: 85%

Metal accumulation rates in sediments from the Southwestern Pacific Basin.

Schmitz

Glasby

Stoffers³

et al. 1999

Geochem. J.

View full text Add to dashboard Cite

“…Behavior of Mn and Cu during early diagenesis of marine sediments depends largely on the redox environment. These elements are in general less mobile under the oxic environment than the suboxic and anoxic one (Froelich et al, 1979;Klinkhammer et al, 1982;Sawlan and Murray, 1983). It is thus suggested that during the bedded chert formation, the depositional environment was oxic.…”

Section: Implications Of Depositional Environment and Origin Of Beddementioning

confidence: 93%

“…Diagenetic overprints that potentially disturb primary geochemical signatures of marine sediments involve remobilization of redox-sensitive elements such as Mn during early diagenesis (Bonatti et al, 1971;Froelich et al, 1979;Klinkhammer et al, 1982;Sawlan and Murray, 1983) and later diagenetic elemental redistribution. The later diagenetic event is represented by dissolution and re-precipitation of silica (radiolarian tests), which could *Whole data set is available upon request to the corresponding author (K. Sugitani).…”

Section: Data Handlingmentioning

confidence: 99%

Biogeochemical signatures preserved in ancient siliceous sediments; new perspectives to Triassic radiolarian bedded chert compositions

et al. 2006

View full text Add to dashboard Cite

Major and minor elements of successively collected 70 Middle Triassic radiolarian bedded cherts from the Mino Belt in central Japan were studied. In order to reveal pre-diagenetic, primary geochemical signatures related to marine biogeochemical cycles, composite data of chert-shale couplets in addition to raw data were examined. The results show that Mn, Cu, Sr, Ba and P were supplied significantly by non-lithogenic excess fractions. Positive correlation with SiO 2 / TiO 2 suggests that accumulations of Ba, Sr, Mn and Cu were closely related to sedimentation of biogenic silica; Mn and Cu were probably incorporated into oxides, whereas Ba into barite. Relationship between SiO 2 /TiO 2 and excess-Ba, proxy for surface productivity implies that regeneration of silica from sinking radiolarian tests was not significant. This may have been caused by an expected relatively short travel time of radiolarian tests from the ocean surface to the bottom, reflecting their large size compared with diatoms. Positive correlations between CaO and P 2 O 5 imply that apatite species are host phases for P and Ca. Although conodont composed of apatite is abundant in both chert and shale, their CaO/P 2 O 5 ratio differs markedly from those of cherts and shales. Other apatite species, possibly carbonate apatite of diagenetic origin, are present in the bedded cherts and contribute to excess-P accumulation. Early diagenesis is believed to have modified only slightly primary geochemical features of the studied bedded cherts. This suggests relatively oxic depositional environment for the bedded cherts, under which regeneration of redox sensitive elements were not active.

show abstract

“…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%

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

View full text Add to dashboard Cite

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.

show abstract

Metal diagenesis in oxic marine sediments

Cited by 208 publications

References 24 publications

Metal accumulation rates in sediments from the Southwestern Pacific Basin.

Metal accumulation rates in sediments from the Southwestern Pacific Basin.

Biogeochemical signatures preserved in ancient siliceous sediments; new perspectives to Triassic radiolarian bedded chert compositions

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

Contact Info

Product

Resources

About