Direct analysis of 210Pb in sediment samples: Self-absorption corrections

Cutshall, N.H.; Larsen, I.L.; Olsen, Curtis R.

doi:10.1016/0167-5087(83)91273-5

Cited by 605 publications

(231 citation statements)

References 3 publications

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“…Because gamma analysis detects lattice bound Zl°pb that may resist acid leaching, incomplete extraction is a possible source of negative error in 21°pb concentrations determined by alpha counting. However, Cutshall et al (1983) report no systematic differences between 21°pb concentrations determined by gamma and alpha spectroscopy for sediment samples having 21°Pb concentrations comparable to those encountered in this study (~<22 dpm g-l). Furthermore, agreement between 21°pb activities of replicate samples digested with concentrated or dilute acid (Fig.…”

Section: Comparison Of Gamma and Alpha Spectroscopymentioning

confidence: 61%

“…The detector was calibrated using synthetic standards made by diluting Standard Pitchblende Ore (US EPA, Las Vegas) with 99.5% SiO 2 to produce a range of sample geometries. 2~°pb activities were corrected for selfattenuation following the procedure of Cutshall et al (1983). Background corrections for Zl°Pb were determined by counting empty aluminum cans.…”

Section: X-radiographymentioning

confidence: 99%

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Episodic deposition and 137Cs immobility in Skan Bay sediments: A ten-year 210Pb and 137Cs time series

1994

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Sugai, S.F., Alperin, M.J. and Reeburgh, W.S., 1994. Episodic deposition and 137Cs immobility in Skan Bay sediments: A ten-year 2X°pb and 13~Cs time series. In: M.I. Scranton (Editor), Variability in Anoxic Systems. Mar. Geol., A geochronology time series provides a powerful tool for elucidating sedimentary processes such as episodic deposition and diffusive mobility of particle-reactive constituents. Depth distributions of 21°Pb and 137Cs from Skan Bay, Alaska were determined for sediment cores collected in 1980, 1984, 1987, and 1990. Sediment X-radiographs reveal distinct layers indicating that sediments were not continuously mixed by bioturbation. However, the geochronology time series is inconsistent with an undisturbed, steady-state sediment column. Profiles from 1980Profiles from , 1984Profiles from , and 1990 reveal subsurface regions in which 21°pb activity is relatively constant. In addition, the depth of the primary 137Cs maximum (reflecting the 1963 peak in atmospheric bomb testing) does not increase in a regular fashion between 1980 and 1990. The 21°pb and 137Cs geochronologies can be reconciled by removing the effects of an instantaneous depositional event. The average 2X°pb sedimentation rate (corrected for episodic deposition) in cores that were collected over a ten year period (0.241 +0.006 g cm -2 yr-1) is in excellent agreement with the average 137Cs sedimentation rate (0.258 _+ 0.008 gcm-2 yr-1) calculated from three stratigraphic markers [peak fallout (1963), first appearance in the sediment record (1952), and the Chernobyl accident (1986)]. The mobility of bomb-derived 13VCs under in situ conditions was evaluated by a time-dependent numerical model applied to the 137Cs time series. The model indicates that bomb-derived cesium is immobile in Skan Bay sediments with a solid-liquid distribution coefficient (Kd) of/> 105 (ml g-1).

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Section: Comparison Of Gamma and Alpha Spectroscopymentioning

confidence: 61%

Section: X-radiographymentioning

confidence: 99%

Episodic deposition and 137Cs immobility in Skan Bay sediments: A ten-year 210Pb and 137Cs time series

1994

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“…These measurements were done for 2 min. 21 Each sample contained a self-absorption factor that was incorporated in the final tally of the total 210 Pb. Samples were then dried at 60 o C until a constant weight was reached.…”

Section: Methodsmentioning

confidence: 99%

A historical evaluation of anthropogenic impact in coastal ecosystems by geochemical signatures

Patchineelam¹,

Sanders²,

Smoak³

et al. 2011

J. Braz. Chem. Soc.

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“…This sieved material was also used for radioisotope activity and metal concentration determinations. Activities of 2•øpb (t•/2 = 22.3 years) were determined either by alpha [Flynn, 1968] or gamma [Cutshall et al, 1983] spectroscopy.…”

Section: Laboratory Methodsmentioning

confidence: 99%

Time‐averaged fluxes of lead and fallout radionuclides to sediments in Florida Bay

Robbins¹,

Holmes²,

Halley³

et al. 2000

J. Geophys. Res.

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Direct analysis of 210Pb in sediment samples: Self-absorption corrections

Cited by 605 publications

References 3 publications

Episodic deposition and 137Cs immobility in Skan Bay sediments: A ten-year 210Pb and 137Cs time series

Episodic deposition and 137Cs immobility in Skan Bay sediments: A ten-year 210Pb and 137Cs time series

A historical evaluation of anthropogenic impact in coastal ecosystems by geochemical signatures

Time‐averaged fluxes of lead and fallout radionuclides to sediments in Florida Bay

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