First detection of fluorine on Mars: Implications for Gale Crater's geochemistry

Olivier Forni; Michael Gaft; Michael J. Toplis; Samuel M. Clegg; Sylvestre Maurice; Roger C. Wiens; Nicolas Mangold; Olivier Gasnault; Violaine Sautter; Stéphane Le Mouélic; Pierre Yves Meslin; Marion Nachon; Rhonda E. McInroy; Ann M. Ollila; Agnès Cousin; John C. Bridges; Nina L. Lanza; Melinda D. Dyar

doi:10.1002/2014GL062742

First detection of fluorine on Mars: Implications for Gale Crater's geochemistry

Olivier Forni, Michael Gaft, Michael J. Toplis, Samuel M. Clegg, Sylvestre Maurice, Roger C. Wiens, Nicolas Mangold, Olivier Gasnault, Violaine Sautter, Stéphane Le Mouélic, Pierre Yves Meslin, Marion Nachon, Rhonda E. McInroy, Ann M. Ollila, Agnès Cousin, John C. Bridges, Nina L. Lanza, Melinda D. Dyar

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Abstract

Volatiles and especially halogens (F and Cl) have been recognized as important species in the genesis and melting of planetary magmas. Data from the Chemical Camera instrument on board the Mars Science Laboratory rover Curiosity now provide the first in situ analyses of fluorine at the surface of Mars. Two principal F-bearing mineral assemblages are identified. The first is associated with high aluminum and low calcium contents, in which the F-bearing phase is an aluminosilicate. It is found in conglomerates and may indicate petrologically evolved sources. This is the first time that such a petrologic environment is found on Mars. The second is represented by samples that have high calcium contents, in which the main F-bearing minerals are likely to be fluorapatites and/or fluorites. Fluorapatites are found in some sandstone and may be detrital, while fluorites are also found in the conglomerates, possibly indicating low-T alteration processes.

Original language	English
Pages (from-to)	1020-1028
Number of pages	9
Journal	Geophysical Research Letters
Volume	42
Issue number	4
DOIs	https://doi.org/10.1002/2014GL062742
State	Published - 28 Feb 2015
Externally published	Yes

Keywords

ChemCam
Mars
fluorine

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Forni, O., Gaft, M., Toplis, M. J., Clegg, S. M., Maurice, S., Wiens, R. C., Mangold, N., Gasnault, O., Sautter, V., Le Mouélic, S., Meslin, P. Y., Nachon, M., McInroy, R. E., Ollila, A. M., Cousin, A., Bridges, J. C., Lanza, N. L., & Dyar, M. D. (2015). First detection of fluorine on Mars: Implications for Gale Crater's geochemistry. Geophysical Research Letters, 42(4), 1020-1028. https://doi.org/10.1002/2014GL062742

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abstract = "Volatiles and especially halogens (F and Cl) have been recognized as important species in the genesis and melting of planetary magmas. Data from the Chemical Camera instrument on board the Mars Science Laboratory rover Curiosity now provide the first in situ analyses of fluorine at the surface of Mars. Two principal F-bearing mineral assemblages are identified. The first is associated with high aluminum and low calcium contents, in which the F-bearing phase is an aluminosilicate. It is found in conglomerates and may indicate petrologically evolved sources. This is the first time that such a petrologic environment is found on Mars. The second is represented by samples that have high calcium contents, in which the main F-bearing minerals are likely to be fluorapatites and/or fluorites. Fluorapatites are found in some sandstone and may be detrital, while fluorites are also found in the conglomerates, possibly indicating low-T alteration processes.",

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Forni, O, Gaft, M, Toplis, MJ, Clegg, SM, Maurice, S, Wiens, RC, Mangold, N, Gasnault, O, Sautter, V, Le Mouélic, S, Meslin, PY, Nachon, M, McInroy, RE, Ollila, AM, Cousin, A, Bridges, JC, Lanza, NL & Dyar, MD 2015, 'First detection of fluorine on Mars: Implications for Gale Crater's geochemistry', Geophysical Research Letters, vol. 42, no. 4, pp. 1020-1028. https://doi.org/10.1002/2014GL062742

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AU - Forni, Olivier

AU - Gaft, Michael

AU - Toplis, Michael J.

AU - Clegg, Samuel M.

AU - Maurice, Sylvestre

AU - Wiens, Roger C.

AU - Mangold, Nicolas

AU - Gasnault, Olivier

AU - Sautter, Violaine

AU - Le Mouélic, Stéphane

AU - Meslin, Pierre Yves

AU - Nachon, Marion

AU - McInroy, Rhonda E.

AU - Ollila, Ann M.

AU - Cousin, Agnès

AU - Bridges, John C.

AU - Lanza, Nina L.

AU - Dyar, Melinda D.

PY - 2015/2/28

Y1 - 2015/2/28

N2 - Volatiles and especially halogens (F and Cl) have been recognized as important species in the genesis and melting of planetary magmas. Data from the Chemical Camera instrument on board the Mars Science Laboratory rover Curiosity now provide the first in situ analyses of fluorine at the surface of Mars. Two principal F-bearing mineral assemblages are identified. The first is associated with high aluminum and low calcium contents, in which the F-bearing phase is an aluminosilicate. It is found in conglomerates and may indicate petrologically evolved sources. This is the first time that such a petrologic environment is found on Mars. The second is represented by samples that have high calcium contents, in which the main F-bearing minerals are likely to be fluorapatites and/or fluorites. Fluorapatites are found in some sandstone and may be detrital, while fluorites are also found in the conglomerates, possibly indicating low-T alteration processes.

AB - Volatiles and especially halogens (F and Cl) have been recognized as important species in the genesis and melting of planetary magmas. Data from the Chemical Camera instrument on board the Mars Science Laboratory rover Curiosity now provide the first in situ analyses of fluorine at the surface of Mars. Two principal F-bearing mineral assemblages are identified. The first is associated with high aluminum and low calcium contents, in which the F-bearing phase is an aluminosilicate. It is found in conglomerates and may indicate petrologically evolved sources. This is the first time that such a petrologic environment is found on Mars. The second is represented by samples that have high calcium contents, in which the main F-bearing minerals are likely to be fluorapatites and/or fluorites. Fluorapatites are found in some sandstone and may be detrital, while fluorites are also found in the conglomerates, possibly indicating low-T alteration processes.

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First detection of fluorine on Mars: Implications for Gale Crater's geochemistry

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