Relationships Between Radionuclide Content and Textural Properties in Irish Sea Intertidal Sediments     

Clifton  J.  McDonald  P.  Plater  A.  Oldfield  F. 《Water, air, and soil pollution》1997,99(1-4):209-216

Intertidal sediments from a range of depositional environments in the eastern Irish Sea have been analysed with regard to their radionuclide content, particle size distribution and magnetic properties. Concentrations of²⁴¹Am and¹³⁷Cs are highly influenced by the abundance of sediment finer than 32μm in fine-grained sedimentary environments, whilst radionuclide activity in coarser sediments is less dependent on particle size. Investigation of the magnetic properties of these sediments highlights a similar association between this size fraction and magnetic remanence, the latter being shown to offer strong potential as a grain size proxy in monitoring¹³⁷Cs concentrations in fine-grained sediments. Analysis of particle size fractions indicates the extent to which¹³⁷Cs may be enriched in the clay size fractions of both tine and coarse sediments.  相似文献   

Treatment and outcomes of ureter injuries due to ovariohysterectomy complications in cats and dogs     

B. L. Plater  V. J. Lipscomb 《The Journal of small animal practice》2020,61(3):170-176

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Rates of Tidal Sedimentation from Records of Industrial Pollution and Environmental Magnetism: The Tees Estuary,North-East England     

Berry  A.  Plater  A. J. 《Water, air, and soil pollution》1998,106(3-4):463-479

The geochemical and magnetic properties of four sediment cores from Greatham Creek in the Tees estuary, north-east England, provide a record of industrial pollution in the intertidal zone. The peak magnetic concentrations, as interpreted from down-core profiles of χ, SIRM, χ_ARM, and Soft magnetisation, provide a rapid and non-destructive proxy for geochemical analyses. In the absence of variation in grain size or post-depositional migration of sediment pollution, differences in the depth of synchronous peak metal and magnetic concentrations between cores can be attributed to the period and frequency of tidal inundation and, hence, accretion rate. Peak Pb and Zn concentrations can be related to the maximum influx from mining activity in the Tees catchment c. AD 1880 or to industrial activity within the Tees estuary during the 20th Century. The former provides rates of tidal sedimentation of approximately 1, 2, 3 and c. 10 mm yr^-1 for the upper saltmarsh, the lower saltmarsh, the mudflats and a tidal sandflat, respectively, whilst the latter gives corresponding accretion rates of 4, 10, 12 and c. 25 mm yr^-1.  相似文献