Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-09T15:29:21.978Z Has data issue: false hasContentIssue false
  • English
  • Français

Silicate weathering in anoxic marine sediments

Published online by Cambridge University Press:  05 July 2018

K. Wallmann ,
G. Aloisi ,
M. Haeckel ,
P. Tishchenko ,
G. Pavlova ,
J. Greinert ,
S. Kutterolf  and
A. Eisenhauer
K. Wallmann*
Affiliation:
IFM-GEOMAR Leibniz Institute of Marine Sciences, Wischhofstrasse 1-3, 24148 Kiel, Germany
G. Aloisi
Affiliation:
Laboratoire de Paléoenvironnements et Paléobiosphère, Université Claude Bernard — Lyon I, 2, rue Dubois, F- 69622 Villeurbanne cedex, France
M. Haeckel
Affiliation:
IFM-GEOMAR Leibniz Institute of Marine Sciences, Wischhofstrasse 1-3, 24148 Kiel, Germany
P. Tishchenko
Affiliation:
Pacific Oceanological Institute (POI), 43, Baltiyskaya Street, 690041 Vladivostok, Russia
G. Pavlova
Affiliation:
Pacific Oceanological Institute (POI), 43, Baltiyskaya Street, 690041 Vladivostok, Russia
J. Greinert
Affiliation:
Renard Centre of Marine Geology Department of Geology and Soil Science, Ghent University, Krijgslaan 281 s.8 B-9000 Ghent, Belgium
S. Kutterolf
Affiliation:
IFM-GEOMAR Leibniz Institute of Marine Sciences, Wischhofstrasse 1-3, 24148 Kiel, Germany
A. Eisenhauer
Affiliation:
IFM-GEOMAR Leibniz Institute of Marine Sciences, Wischhofstrasse 1-3, 24148 Kiel, Germany
*
*E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Extract

Two sediment cores retrieved at the northern slope of Sakhalin Island, Sea of Okhotsk, were analysed for biogenic opal, organic carbon, carbonate, sulphur, major element concentrations, mineral contents and dissolved substances including nutrients, sulphate, methane, major cations, humic substances and total alkalinity. Down-core trends in mineral abundance suggest that plagioclase feldspars and other reactive silicate phases (olivine, pyroxene, volcanic ash) are transformed into smectite in the methanogenic sediment sections. The element ratios Na/Al, Mg/Al and Ca/Al in the solid phase decrease with sediment depth indicating a loss of mobile cations with depth and producing a significant down-core increase in the chemical index of alteration.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 363 - 366
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Archer, D.E. (1996) An atlas of the distribution of calcium carbonate in sediments of the deep sea. Global Biogeochemical Cycles, 10, 159–174.CrossRefGoogle Scholar
Berner, R.A. (2004) The Phanerozoic Carbon Cycle: CO2 and O2 . Oxford University Press.CrossRefGoogle Scholar
Berner, E.K. and Berner, R.A. (1996) Global Environment: Water, Air and Geochemical Cycles. Prentice Hall.Google Scholar
Hedges, J.I. and Keil, R.G. (1995) Sedimentary organic matter preservation: an assessment and speculative synthesis. Marine Chemistry, 49, 81–115.CrossRefGoogle Scholar
House, K.Z., Schrag, D.P., Harvey, C.F. and Lackner, K.S. (2006) Permanent carbon dioxide storage in deep-sea sediments. PNAS, 103, 12291–12295.CrossRefGoogle ScholarPubMed
Otsuki, A.S., Watanabe, S. and Tsunogai, S. (2003) Adsorption of atmospheric CO2 and its transport to the intermediate layer in the Okhotsk Sea. Journal of Oceanography, 59, 709–717.CrossRefGoogle Scholar
Thomas, H., Bozec, Y., Elkalay, K. and de Baar, H.J.W. (2004) Enhanced open ocean storage of CO2 from shelf sea pumping. Science, 304, 1005–1008.CrossRefGoogle ScholarPubMed
Tsunogai, S., Watanabe, S. and Sato, T. (1999) Is there a “continental shelf pump” for the absorption of atmospheric CO2? Tellus, 51, 701–712.Google Scholar
Wallmann, K., Aloisi, G., Haeckel, M., Obzhirov, A., Pavlova, G. and Tishchenko, P. (2006) Kinetics of organic matter degradation, microbial methane generation, and gas hydrate formation in anoxic marine sediments. Geochimica et Cosmochimica Ada, 70, 3905–3927.CrossRefGoogle Scholar
Wallmann, K., Aloisi, G., Haeckel, M., Tishchenko, P., Pavlova, G., Greinert, J., Kutterolf, S. and Eisenhauer, A. (2008) Silicate weathering in anoxic marine sediments. Geochimica et Cosmochimica Ada, 72, 3067–3090.CrossRefGoogle Scholar