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Fe–Mn-(hydr)oxide-carbonate crusts from the Kebrit Deep, Red Sea: Precipitation at the seawater/brine redoxcline
Copyright policy )Fe–Mn-(hydr)oxide-carbonate crusts from the Kebrit Deep, Red Sea: Precipitation at the seawater/brine redoxcline
Lithified crusts located within the sediment and recovered from the Kebrit Deep (Red Sea) are composed of Fe- and Mn-(hydr) oxides, carbonates, and sulfides. Mineralogical and geochemical features of these crusts suggest that they are metalliferous layers lithified by carbonates and formed in the narrow band where the transition zone between the anoxic brine and deep seawater crossed the seafloor. Carbonates cementing the Fe-Mn-(hydr)oxides precipitated from normal saline seawater at T=20-30 degrees C. Precipitation of Fe-Mn-(hydr)oxides was superimposed the carbonate precipitation in the transition zone. A pumping mechanism involving cyclic Fe- and Mn-(hydr)oxide precipitation/redissolution operated through the transition zone and produced an enrichment of a number of elements in the crusts. The microbiota played an important role in the geochemical cycle of the elements through the redoxcline and in the mineralogy of the sediments underlying the redoxcline waters. Diagenetic processes led to formation of bi- and ternary carbonates, and disulfides. (c) 2006 Elsevier B.V. All rights reserved.
- Sofia University Bulgaria
- Kiel University Germany
Microsoft Academic Graph classification: Geochemistry Sediment Anoxic waters Geochemical cycle Diagenesis chemistry.chemical_compound chemistry Transition zone Carbonate Seawater Lithification Geology
Geology, Oceanography, Geochemistry and Petrology
Geology, Oceanography, Geochemistry and Petrology
Microsoft Academic Graph classification: Geochemistry Sediment Anoxic waters Geochemical cycle Diagenesis chemistry.chemical_compound chemistry Transition zone Carbonate Seawater Lithification Geology
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).11 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).11 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!- Sofia University Bulgaria
- Kiel University Germany
Lithified crusts located within the sediment and recovered from the Kebrit Deep (Red Sea) are composed of Fe- and Mn-(hydr) oxides, carbonates, and sulfides. Mineralogical and geochemical features of these crusts suggest that they are metalliferous layers lithified by carbonates and formed in the narrow band where the transition zone between the anoxic brine and deep seawater crossed the seafloor. Carbonates cementing the Fe-Mn-(hydr)oxides precipitated from normal saline seawater at T=20-30 degrees C. Precipitation of Fe-Mn-(hydr)oxides was superimposed the carbonate precipitation in the transition zone. A pumping mechanism involving cyclic Fe- and Mn-(hydr)oxide precipitation/redissolution operated through the transition zone and produced an enrichment of a number of elements in the crusts. The microbiota played an important role in the geochemical cycle of the elements through the redoxcline and in the mineralogy of the sediments underlying the redoxcline waters. Diagenetic processes led to formation of bi- and ternary carbonates, and disulfides. (c) 2006 Elsevier B.V. All rights reserved.