doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars
Abstract—Major uncertainties exist with respect to the aqueous geochemical evolution of the Martian surface. Considering the prevailing cryogenic climates and the abundance of salts and iron minerals on Mars, any attempt at comprehensive modeling of Martian aqueous chemistry should include iron chem...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.573.5424 2023-05-15T15:52:48+02:00 doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars Giles M. Marion David C. Catling Jeffrey S. Kargel The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.5424 http://www.atmos.washington.edu/~davidc/papers_mine/Marion-Catling2003.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.5424 http://www.atmos.washington.edu/~davidc/papers_mine/Marion-Catling2003.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.atmos.washington.edu/~davidc/papers_mine/Marion-Catling2003.pdf text 2002 ftciteseerx 2016-01-08T12:38:42Z Abstract—Major uncertainties exist with respect to the aqueous geochemical evolution of the Martian surface. Considering the prevailing cryogenic climates and the abundance of salts and iron minerals on Mars, any attempt at comprehensive modeling of Martian aqueous chemistry should include iron chemistry and be valid at low temperatures and high solution concentrations. The objectives of this paper were to (1) estimate ferrous iron Pitzer-equation parameters and iron mineral solubility products at low temperatures (from 0 °C to 25 °C), (2) incorporate these parameters and solubility products into the FREZCHEM model, and (3) use the model to simulate the surficial aqueous geochemical evolution of Mars. Ferrous iron Pitzer-equation parameters were derived in this work or taken from the literature. Six new iron minerals [FeCl24H2O, FeCl26H2O, FeSO4H2O, FeSO47H2O, FeCO3, and Fe(OH)3] were added to the FREZCHEM model bringing the total solid phases to 56. Agreement between model predictions and experimental data are fair to excellent for the ferrous systems: Fe-Cl, Fe-SO4, Fe-HCO3, H-Fe-Cl, and H-Fe-SO4. We quantified a conceptual model for the aqueous geochemical evolution of the Martian surface. The five stages of the conceptual model are: (1) carbonic acid weathering of primary ferromagnesian minerals to form an initial magnesium-iron-bicarbonate-rich solution; (2) evaporation and precipitation of carbonates, including Text Carbonic acid Unknown |
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Abstract—Major uncertainties exist with respect to the aqueous geochemical evolution of the Martian surface. Considering the prevailing cryogenic climates and the abundance of salts and iron minerals on Mars, any attempt at comprehensive modeling of Martian aqueous chemistry should include iron chemistry and be valid at low temperatures and high solution concentrations. The objectives of this paper were to (1) estimate ferrous iron Pitzer-equation parameters and iron mineral solubility products at low temperatures (from 0 °C to 25 °C), (2) incorporate these parameters and solubility products into the FREZCHEM model, and (3) use the model to simulate the surficial aqueous geochemical evolution of Mars. Ferrous iron Pitzer-equation parameters were derived in this work or taken from the literature. Six new iron minerals [FeCl24H2O, FeCl26H2O, FeSO4H2O, FeSO47H2O, FeCO3, and Fe(OH)3] were added to the FREZCHEM model bringing the total solid phases to 56. Agreement between model predictions and experimental data are fair to excellent for the ferrous systems: Fe-Cl, Fe-SO4, Fe-HCO3, H-Fe-Cl, and H-Fe-SO4. We quantified a conceptual model for the aqueous geochemical evolution of the Martian surface. The five stages of the conceptual model are: (1) carbonic acid weathering of primary ferromagnesian minerals to form an initial magnesium-iron-bicarbonate-rich solution; (2) evaporation and precipitation of carbonates, including |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Giles M. Marion David C. Catling Jeffrey S. Kargel |
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Giles M. Marion David C. Catling Jeffrey S. Kargel doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars |
author_facet |
Giles M. Marion David C. Catling Jeffrey S. Kargel |
author_sort |
Giles M. Marion |
title |
doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars |
title_short |
doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars |
title_full |
doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars |
title_fullStr |
doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars |
title_full_unstemmed |
doi:10.1016/S0016-7037(03)00372-7 Modeling aqueous ferrous iron chemistry at low temperatures with application to Mars |
title_sort |
doi:10.1016/s0016-7037(03)00372-7 modeling aqueous ferrous iron chemistry at low temperatures with application to mars |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.5424 http://www.atmos.washington.edu/~davidc/papers_mine/Marion-Catling2003.pdf |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
http://www.atmos.washington.edu/~davidc/papers_mine/Marion-Catling2003.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.5424 http://www.atmos.washington.edu/~davidc/papers_mine/Marion-Catling2003.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766387896208588800 |