Magnetic susceptibility of Late Weichselian deposits in southeastern Sweden

Björck, Svante; Dearing, John A.; Jönsson, Anders

doi:10.1111/j.1502-3885.1982.tb00525.x

Cited by 34 publications

(2 citation statements)

References 12 publications

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“…The scatter most probably relates to the ratio of very fine (<2 pm) to coarser particles in the samples, i.e. reflect variations in the relative proportions of summer and winter layers (Bjorck et al 1982). Because of these particles size variations, no close correlation exists between samples at approximately the same depth (as seen in Figs.…”

Section: Laboratory Methodsmentioning

confidence: 97%

Palaeomagnetic records from two varved clay sequences in the Middle Swedish ice marginal zone

Sandgren¹,

Björck²,

Brunnberg³

et al. 1988

Boreas

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Two varved clay sequences, at Rystad and Tottnäs, situated in the Middle Swedish ice marginal zone were analysed palaeomagnetically. Two parallel profiles were sampled and analysed at each site. The varved clay at Rystad was dated by floating varve chronology. The varves at Tottnäs can be linked to Swedish time scale, expressed in calendar years B.P. Due to the distance between the sites they cannot be correlated by means of varve diagrams. Palaemagnetic methods were used as an alternative. Based an AF demanetization of pilot samples, the palaeomanetic to be too low, in the order of15d̀, compared to the site latitude. At Tottnäs the inclination records are very close to the expected inclination with respect to the site latitude. Because of a systematic inclination error in the Rystad profiles the correlation was based on the declination records. Statistical comparisons of these records between the two sites indicate that the sediment successions are partly synchronous. It is concluded that the deglaciation at Tottnäs started c. 130 years earlier than at Rystad. This mean that the Swedish ice marginal zone east of Rystad will have a more northeasterly extension than previously thought.

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Section: Laboratory Methodsmentioning

confidence: 97%

Palaeomagnetic records from two varved clay sequences in the Middle Swedish ice marginal zone

Sandgren¹,

Björck²,

Brunnberg³

et al. 1988

Boreas

Self Cite

View full text Add to dashboard Cite

show abstract

“…John Birks led a PhD course in multivariate statistics and I was flabbergasted. Peter Beales became a close friend and checked the English text of my thesis, and together with John Dearing, I published my 6th paper (Björck et al 1982). One thing that astonished me was how young the English post-docs were!…”

Section: S: Captivatedmentioning

confidence: 97%

Ice, water and sediments: a cold, wet and muddy account of a very fun life in science

Björck

2019

J Paleolimnol

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Mineral magnetic characterization of sediment sources from an analysis of lake and floodplain sediments in the catchments of the Old Mill reservoir and Slapton Ley, South Devon, UK

Foster¹,

Lees²,

Owens³

et al. 1998

Earth Surf. Process. Landforms

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Research on suspended sediment transport in the catchments of the Old Mill reservoir and Slapton Lower Ley, South Devon, has attempted to discriminate changing catchment sources on the basis of downcore variations in the mineral magnetic properties of lake, reservoir and floodplain sediments. Here, we examine these downcore variations and also explore the variability in catchment sources and the influence of topographic controls on mineral magnetic signatures of topsoils and subsoils. Particle size controls on the mineral magnetic signatures are explored by an analysis of a fractionated sediment sample, whilst the possible impact of diagenesis is assessed by an examination of the Mn profiles in the lake and reservoir sediments. From this analysis it is evident that the mineral magnetic signatures of well sorted floodplain deposits are more likely to reflect the particle size composition of the transported material. By contrast, the mineral magnetic record in the sediment of Slapton Ley appears to be most strongly influenced by dissolution of magnetic minerals. The sediment of the Old Mill reservoir provides the only suitable record for the application of a simple mixing model which is developed in order to quantify changes in the relative contribution of topsoil and subsoil through time. The research has important implications for attempting to reconstruct sediment sources in highly eutrophic lakes and emphasizes the uncertainty in the application of simple mixing models.

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Magnetic susceptibility of Late Weichselian deposits in southeastern Sweden

Cited by 34 publications

References 12 publications

Palaeomagnetic records from two varved clay sequences in the Middle Swedish ice marginal zone

Palaeomagnetic records from two varved clay sequences in the Middle Swedish ice marginal zone

Ice, water and sediments: a cold, wet and muddy account of a very fun life in science

Mineral magnetic characterization of sediment sources from an analysis of lake and floodplain sediments in the catchments of the Old Mill reservoir and Slapton Ley, South Devon, UK

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