Interpretation of Si concentrations in lake sediments: three case studies |
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| Authors: | E K Peinerud |
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| Institution: | Division of Applied Geology, Lule? University of Technology, 971 87 Lule?, Sweden, SE
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| Abstract: | The biogenic Si concentration in a sediment can be determined as the non-detrital Si concentration by normalization of the
total Si concentration with Al. This procedure is based upon the assumptions that (1) that Al exists predominantly in detrital,
i.e. minerogenic, particles and (2) that biogenic Si (mainly diatom frustules) is the dominating non-detrital Si phase. This
paper focuses on the reasons for the variations of the non-detrital Si concentration in these lake sediments. Data from three
lakes are presented, representing three principally different cases regarding the Si concentration. The processes controlling
the concentrations of detrital and non-detrital Si are discussed.
Received: 10 June 2000 · Accepted: 25 November 2000 |
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| Keywords: | detrital matter Lake sediment Silicon Sweden |
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