Iron reduction through the tan-green color transition in deep-sea sediments

I. König; M. Drodt; E. Suess; A. X. Trautwein

doi:10.1016/S0016-7037(97)00007-0

Iron reduction through the tan-green color transition in deep-sea sediments

I. König, M. Drodt, E. Suess^*, A. X. Trautwein

^*Corresponding author for this work

GEOMAR Forschungszentrum für Marine Geowissenschaften

53 Citations (Scopus)

Abstract

Mössbauer spectroscopic investigations of deep-sea sediments from the Peru Basin revealed a prominent downcore increase of the bulk sediment Fe(II)/Fe(III) ratio across the well-known tan-green color transition. This increase occurs along a continuous gradient extending over a 3 cm zone at the two deep-sea sites that we report. Remarkably constant values of the Fe(II)/Fe(III) ratios above (11 ± 2%/89 ± 2%) and below (37 ± 2%/63 ± 2%) the iron redox transition-zone delimit the gradient clearly. A minor peak of diagenetic iron enrichment is manifest at the redox front. This Fe enrichment has accumulated in a redox cycle and amounts to 16 ± 4% of the total Fe at the peak maximum. The data imply that 26 ± 4% of the detrital iron has experienced in situ redox transition from Fe(III) to Fe(II) within the iron redox transition-zone.

Original language	English
Journal	Geochimica et Cosmochimica Acta
Volume	61
Issue number	8
Pages (from-to)	1679-1683
Number of pages	5
ISSN	0016-7037
DOIs	https://doi.org/10.1016/S0016-7037(97)00007-0
Publication status	Published - 01.04.1997

Funding

Acknowledgments--We wish to thank two anonymous reviewers for their constructive reviews of this paper. This research was funded by the German Federal Ministry of Education, Science, Research, and Technology (grants 03G0509A and 03G0509B). The responsibility for the contents of this publication is with the authors.

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10.1016/S0016-7037(97)00007-0

Cite this

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title = "Iron reduction through the tan-green color transition in deep-sea sediments",

abstract = "M{\"o}ssbauer spectroscopic investigations of deep-sea sediments from the Peru Basin revealed a prominent downcore increase of the bulk sediment Fe(II)/Fe(III) ratio across the well-known tan-green color transition. This increase occurs along a continuous gradient extending over a 3 cm zone at the two deep-sea sites that we report. Remarkably constant values of the Fe(II)/Fe(III) ratios above (11 ± 2\%/89 ± 2\%) and below (37 ± 2\%/63 ± 2\%) the iron redox transition-zone delimit the gradient clearly. A minor peak of diagenetic iron enrichment is manifest at the redox front. This Fe enrichment has accumulated in a redox cycle and amounts to 16 ± 4\% of the total Fe at the peak maximum. The data imply that 26 ± 4\% of the detrital iron has experienced in situ redox transition from Fe(III) to Fe(II) within the iron redox transition-zone.",

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T1 - Iron reduction through the tan-green color transition in deep-sea sediments

AU - König, I.

AU - Drodt, M.

AU - Suess, E.

AU - Trautwein, A. X.

PY - 1997/4/1

Y1 - 1997/4/1

N2 - Mössbauer spectroscopic investigations of deep-sea sediments from the Peru Basin revealed a prominent downcore increase of the bulk sediment Fe(II)/Fe(III) ratio across the well-known tan-green color transition. This increase occurs along a continuous gradient extending over a 3 cm zone at the two deep-sea sites that we report. Remarkably constant values of the Fe(II)/Fe(III) ratios above (11 ± 2%/89 ± 2%) and below (37 ± 2%/63 ± 2%) the iron redox transition-zone delimit the gradient clearly. A minor peak of diagenetic iron enrichment is manifest at the redox front. This Fe enrichment has accumulated in a redox cycle and amounts to 16 ± 4% of the total Fe at the peak maximum. The data imply that 26 ± 4% of the detrital iron has experienced in situ redox transition from Fe(III) to Fe(II) within the iron redox transition-zone.

AB - Mössbauer spectroscopic investigations of deep-sea sediments from the Peru Basin revealed a prominent downcore increase of the bulk sediment Fe(II)/Fe(III) ratio across the well-known tan-green color transition. This increase occurs along a continuous gradient extending over a 3 cm zone at the two deep-sea sites that we report. Remarkably constant values of the Fe(II)/Fe(III) ratios above (11 ± 2%/89 ± 2%) and below (37 ± 2%/63 ± 2%) the iron redox transition-zone delimit the gradient clearly. A minor peak of diagenetic iron enrichment is manifest at the redox front. This Fe enrichment has accumulated in a redox cycle and amounts to 16 ± 4% of the total Fe at the peak maximum. The data imply that 26 ± 4% of the detrital iron has experienced in situ redox transition from Fe(III) to Fe(II) within the iron redox transition-zone.

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JO - Geochimica et Cosmochimica Acta

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Iron reduction through the tan-green color transition in deep-sea sediments

Abstract

Funding

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