Chemical variability in mineralized veins observed by ChemCam on the lower slopes of Mount Sharp in Gale crater, Mars
Abstract
ChemCam has observed a wide range of diagenetic features along the Curiosity rover traverse including pervasive Ca-sulfate veins. Observations by multiple instruments on Curiosity indicate that these veins are hydrated, formed during diagenetic fluid event(s). In this study, we delve into the chemical variability in these Ca-sulfate bearing veins and have identified two subsets in the Murray formation with enrichments in Fe and Fe + Mg. These chemical trends do not reflect a sampling mixture with the surrounding host rock but likely indicates the presence of authigenic phases formed during the emplacement of these veins. Based on passive reflectance spectral analysis and correlation with other elements, Fe3+ oxides and/or sulfates are proposed to account for the Fe-rich observations in the vicinity of the Naukluft Plateau whereas the Fe + Mg trend is also observed in adjacent dark-toned features with elevated Mn and P near the Old Soaker outcrop. In conclusion, the specific localization of these observations in the Gale stratigraphy implies changing pH and redox conditions in the groundwater at the time of formation of these veins, from oxidizing and likely more acidic near the Naukluft Plateau to more reducing conditions in the upper part of the Murray formation.
- Authors:
-
[2];
[5];
[2];
[7]
- Univ. de Nantes, Nantes (France)
- Univ. de Toulouse, Toulouse (France)
- Johns Hopkins Univ. Applied Physics Lab., Laurel, MD (United States)
- Univ. de Toulouse, Toulouse (France); California Inst. of Technology (CalTech), Pasadena, CA (United States)
- Univ. de Toulouse, Toulouse (France); Univ. Lyon, Villeurbanne (France)
- UC Davis Earth and Planetary Science, Davis, CA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- National Aeronautics and Space Administration (NASA); USDOE
- OSTI Identifier:
- 1508554
- Report Number(s):
- LA-UR-18-28854
Journal ID: ISSN 0019-1035
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Icarus
- Additional Journal Information:
- Journal Volume: 311; Journal Issue: C; Journal ID: ISSN 0019-1035
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Planetary Sciences; Mars; Gale crater; Diagenesis; Calcium sulfate; ChemCam
Citation Formats
L'Haridon, Jonas, Mangold, Nicolas, Meslin, P. -Y., Johnson, J. R., Rapin, W., Forni, O., Cousin, A., Payré, V., Dehouck, E., Nachon, M., Le Deit, L., Gasnault, Olivier, Maurice, Sylvestre, and Wiens, Roger Craig. Chemical variability in mineralized veins observed by ChemCam on the lower slopes of Mount Sharp in Gale crater, Mars. United States: N. p., 2018.
Web. doi:10.1016/j.icarus.2018.01.028.
L'Haridon, Jonas, Mangold, Nicolas, Meslin, P. -Y., Johnson, J. R., Rapin, W., Forni, O., Cousin, A., Payré, V., Dehouck, E., Nachon, M., Le Deit, L., Gasnault, Olivier, Maurice, Sylvestre, & Wiens, Roger Craig. Chemical variability in mineralized veins observed by ChemCam on the lower slopes of Mount Sharp in Gale crater, Mars. United States. https://doi.org/10.1016/j.icarus.2018.01.028
L'Haridon, Jonas, Mangold, Nicolas, Meslin, P. -Y., Johnson, J. R., Rapin, W., Forni, O., Cousin, A., Payré, V., Dehouck, E., Nachon, M., Le Deit, L., Gasnault, Olivier, Maurice, Sylvestre, and Wiens, Roger Craig. Sat .
"Chemical variability in mineralized veins observed by ChemCam on the lower slopes of Mount Sharp in Gale crater, Mars". United States. https://doi.org/10.1016/j.icarus.2018.01.028. https://www.osti.gov/servlets/purl/1508554.
@article{osti_1508554,
title = {Chemical variability in mineralized veins observed by ChemCam on the lower slopes of Mount Sharp in Gale crater, Mars},
author = {L'Haridon, Jonas and Mangold, Nicolas and Meslin, P. -Y. and Johnson, J. R. and Rapin, W. and Forni, O. and Cousin, A. and Payré, V. and Dehouck, E. and Nachon, M. and Le Deit, L. and Gasnault, Olivier and Maurice, Sylvestre and Wiens, Roger Craig},
abstractNote = {ChemCam has observed a wide range of diagenetic features along the Curiosity rover traverse including pervasive Ca-sulfate veins. Observations by multiple instruments on Curiosity indicate that these veins are hydrated, formed during diagenetic fluid event(s). In this study, we delve into the chemical variability in these Ca-sulfate bearing veins and have identified two subsets in the Murray formation with enrichments in Fe and Fe + Mg. These chemical trends do not reflect a sampling mixture with the surrounding host rock but likely indicates the presence of authigenic phases formed during the emplacement of these veins. Based on passive reflectance spectral analysis and correlation with other elements, Fe3+ oxides and/or sulfates are proposed to account for the Fe-rich observations in the vicinity of the Naukluft Plateau whereas the Fe + Mg trend is also observed in adjacent dark-toned features with elevated Mn and P near the Old Soaker outcrop. In conclusion, the specific localization of these observations in the Gale stratigraphy implies changing pH and redox conditions in the groundwater at the time of formation of these veins, from oxidizing and likely more acidic near the Naukluft Plateau to more reducing conditions in the upper part of the Murray formation.},
doi = {10.1016/j.icarus.2018.01.028},
journal = {Icarus},
number = C,
volume = 311,
place = {United States},
year = {Sat Mar 17 00:00:00 EDT 2018},
month = {Sat Mar 17 00:00:00 EDT 2018}
}
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