Article (Scientific journals)
Reducing Power of Ferrous Iron in the Archean Ocean, 1. Contribution of Photosynthetic Oxygen
François, Louis; Gérard, Jean-Claude
1986In Paleoceanography, 1, p. 355-368
Peer Reviewed verified by ORBi
 

Files


Full Text
Francois_et_al-1986-Paleoceanography.pdf
Publisher postprint (851.07 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Abstract :
[en] A quantitative model of the Archean ocean is developed in order to estimate the oxidation rate of dissolved ferrous iron, a key process for the deposition of banded iron formations. The continuity equation including chemical reactions and vertical transport is solved for 0 2 and Fe II. The oxidation rate depends on the oceanic pH profile, which ks calculated as a function of the atmospheric CO pressure. In this first part, the2 oxidation due to the reaction with photosynthetic oxygen is considered. The results are presented as a function of the oxygen concentration in the mixed layer which was varie_• between 10-10 and 10-6 mol kg . It ks shown that this Fe II oxidation by 0 is very efficient and that r•latively low 02 levels are required for the oxidation rate to be limited by upward transport of iron to the surface ocean. Possible evolutionary paths for the Archean ocean-atmosphere system are discussed by an analysis of the balance of the iron input flux.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
François, Louis  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques
Gérard, Jean-Claude  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Language :
English
Title :
Reducing Power of Ferrous Iron in the Archean Ocean, 1. Contribution of Photosynthetic Oxygen
Publication date :
1986
Journal title :
Paleoceanography
ISSN :
0883-8305
eISSN :
1944-9186
Publisher :
American Geophysical Union (AGU), Washington DC, United States
Volume :
1
Pages :
355-368
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 31 October 2009

Statistics


Number of views
44 (11 by ULiège)
Number of downloads
127 (2 by ULiège)

Scopus citations®
 
9
Scopus citations®
without self-citations
7
OpenCitations
 
11

Bibliography


Similar publications



Contact ORBi