Isotope sediment dating

Posted by / 05-Sep-2018 19:46

Isotope sediment dating

The sediment deposition rate (1.67 mm year) based on the in situ measurement was comparable with the sediment accumulation rate calculated using the Constant Flux: Constant Sedimentation Rate model for the isotopic method.The age of the sediment layers was determined with the Constant Rate of Supply model; the deepest layers had accumulated around 1900.

DDT and γ-HCH were the dominant OCPs in sediments from the creek.Cs is analysed by directly counting the sediment in a high resolution low background germanium gamma detector.Pb against depth or cumulative weight (to allow for compacting) will be a straight line if the sedimentation rate has been constant.In conjunction with the Geosciences Advisory Unit at the National Oceanography Centre in Southampton we are able to offer this relatively new technique for precisely dating very recent sediments.This is particularly applicable in dating sediment accumulation rates for geohazard analysis in subsea engineering projects.

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