Abstract
Black shales from the Cenomanian/Turonian Boundary Event show a remarkable enrichment in trace metals (Cd, Ag, Zn, Sb, Mo, V, Cu, etc.) relative to normal shales, Lower Toarcian black shales from SW Germany or TOC-rich sediments from recent upwelling areas. If these enrichments are authigenic in origin, trace metals may serve as indicators for the paleoenvironmental conditions during deposition of black shales. Low sediment accumulation rates, a comparably low organic primary productivity and enhanced preservation of TOC due to anaerobic conditions in the water column then are indicated for the Cenomanian/Turonian time interval.
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References
BRULAND, K.W. (1980): Oceanographic distributions of cadmium, zinc, nickel, and copper in the North Pacific.— Earth Planet. Sci. Lett. 47, 176–198.
BRUMSACK, H.-J. (1986): The inorganic geochemistry of Cretaceous black shales (DSDP Leg 41) in comparison to modern upwelling sediments from the Gulf of California.— in: SUMMERHAYES, C. P. & SHACKLETON, N. J. (eds.): North Atlantic Paleoceanography. Spec. Publ. Geol. Soc. London, Oxford, Blackwell.
CHESTER, R.A.; GRIFFITHS, A. & STONER, J.H. (1978): Minor metal content of surface seawater particulates and organic-rich shelf sediments.— Nature 275, 308–309.
COBLER, R. & DYMOND, J. (1980): Sediment trap experiment on the Galapagos Spreading Centre, Equatorial Pacific.— Science 209, 801.
COLLIER, R.W. (1984): Particulate and dissolved vanadium in the North Pacific ocean.— Nature 309, 441–444.
DYMOND, J.; FISCHER, K.; CLAUSON, M.; COBLER, W.; GARDNER; W.; RICHARDSON, M.J.; BERGER, W.; SOUTAR, A. & DUNBAR, R. (1981) A sediment trap intercomparison study in the Santa Barbara Basin.— Earth Planet. Sci. Lett. 53, 409.
JACOBS, L.; EMERSON, S. & SKEI, J. (1985): Partitioning and transport of metals across the O2/H2S interface in a permanently anoxic basin: Framvaren Fjord, Norway.— Geochim. Cosmochim. Acta 49, 1433–1444.
JICKELLS, T.D.; DEUSER, W.G. & KNAP, A.H. (1984): The sedimentation rates of trace elements in the Sargasso Sea measured by sediment trap.— Deep-Sea Res. 31, 1169–1178.
KNAUER, G.A.; MARTIN, G.A. & GORDON, R.M. (1982): Cobalt in north-east Pacific waters.— Nature 297, 49–51.
LANDING, W.M. & FEELY, R.A. (1981): The chemistry and vertical flux of particles in the northeastern Gulf of Alaska.— Deep-Sea Res. 28A, 19–37.
MARTIN, J.H.; KNAUER, G.A. & GORDON, R.M. (1983): Silver distribution and fluxes in north-east Pacific waters.— Nature 305, 306–309.
THUROW, J. & KUHNT, W. (1986): Mid-Cretaceous of the Gibraltar Arch area.— in: SUMMERHAYES, C.P. & SHACKLETON, N.J. (eds.): North Atlantic Paleoceanography. Spec. Publ. Geol. Soc. London, Oxford, Blackwell.
WIEDMANN, J.; BUTT, A. & EINSELE, G. (1978): Vergleich von marokkanischen Kreide-Aufschlüssen und Tiefseebohrungen (DSDP): Stratigraphie, Paläoenvironment und Subsidenz an einem passiven Kontinentalrand.— Geol. Rdsch. 67, 454–508.
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© 1986 Springer-Verlag
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Brumsack, HJ. (1986). Trace metal accumulation in black shales from the Cenomanian/Turonian Boundary Event. In: Walliser, O.H. (eds) Global Bio-Events. Lecture Notes in Earth Sciences, vol 8. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0010216
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DOI: https://doi.org/10.1007/BFb0010216
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