Lanza, Nina L. and Fischer, Woodward W. and Wiens, Roger C. and Grotzinger, John P. and Ollila, Ann M. and Cousin, Agnes and Anderson, Ryan B. and Clark, Benton C. and Gellert, Ralf and Mangold, Nicolas and Maurice, Sylvester and Le Mouélic, Stéphane and Nachon, Marion and Schmidt, Mariek E. and Berger, Jeffrey and Clegg, Samuel M. and Forni, Olivier and Hardgrove, Craig and Melikechi, Noureddine and Newsom, Horton E. and Sautter, Violaine (2014) High manganese concentrations in rocks at Gale crater, Mars. Geophysical Research Letters, 41 (16). pp. 5755-5763. ISSN 0094-8276. https://resolver.caltech.edu/CaltechAUTHORS:20141107-111618504
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Abstract
The surface of Mars has long been considered a relatively oxidizing environment, an idea supported by the abundance of ferric iron phases observed there. However, compared to iron, manganese is sensitive only to high redox potential oxidants, and when concentrated in rocks, it provides a more specific redox indicator of aqueous environments. Observations from the ChemCam instrument on the Curiosity rover indicate abundances of manganese in and on some rock targets that are 1–2 orders of magnitude higher than previously observed on Mars, suggesting the presence of an as-yet unidentified manganese-rich phase. These results show that the Martian surface has at some point in time hosted much more highly oxidizing conditions than has previously been recognized.
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| Additional Information: | © 2014 American Geophysical Union. Received 29 April 2014; Accepted 13 July 2014; Accepted article online 18 July 2014; Published online 25 August 2014. The data reported here are archived at the Planetary Data System, available at http://pds-geosciences.wustl.edu/missions/msl/index.htm. This research was carried out with funding from NASA’s Mars Program Office and the Centre National d’Etudes Spatiales (CNES) in France. We are grateful to Bradley Tebo and an anonymous reviewer for providing valuable feedback. The Editor thanks Bradley Tebo and an anonymous reviewer for their assistance in evaluating this paper. | ||||||||||||||||||||||||||||||||
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| Issue or Number: | 16 | ||||||||||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20141107-111618504 | ||||||||||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20141107-111618504 | ||||||||||||||||||||||||||||||||
| Official Citation: | Lanza, N. L., et al. (2014), Highmanganese concentrations in rocks at Gale crater, Mars, Geophys. Res. Lett., 41, 5755–5763, doi:10.1002/2014GL060329. | ||||||||||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||||||||||
| ID Code: | 51436 | ||||||||||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||||||||||
| Deposited By: | Jason Perez | ||||||||||||||||||||||||||||||||
| Deposited On: | 07 Nov 2014 21:57 | ||||||||||||||||||||||||||||||||
| Last Modified: | 09 Mar 2020 13:19 |
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