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The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars.

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Title: The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars.
Authors: Mahaffy, P. R., Webster, C. R., Stern, J. C., Brunner, A. E., Atreya, S. K., Conrad, P. G., Domagal-Goldman, S., Eigenbrode, J. L., Flesch, G. J., Christensen, L. E., Franz, H. B., Freissinet, C., Glavin, D. P., Grotzinger, J. P., Jones, J. H., Leshin, L. A., Malespin, C., McAdam, A. C., Ming, D. W., Navarro-Gonzalez, R.
Source: Science (pre-March 2025). 1/23/2015, Vol. 347 Issue 6220, p412-414. 3p.
Subjects: Curiosity (Spacecraft), Atmospheric evolution, Clay soil testing, Deuterium, Hydrogen analysis, Martian atmosphere, Water on Mars, Gale Crater (Mars)
Abstract: The deuterium-to-hydrogen (D/H) ratio in strongly bound water or hydroxyl groups in ancient martian clays retains the imprint of the water of formation of these minerals. Curiosity's Sample Analysis at Mars (SAM) experiment measured thermally evolved water and hydrogen gas released between 550° and 950°C from samples of Hesperian-era Gale crater smectite to determine this isotope ratio. The D/H value is 3.0 (®0.2) times the ratio in standard mean ocean water. The D/H ratio in this ~3-billion-year-old mudstone, which is half that of the present martian atmosphere but substantially higher than that expected in very early Mars, indicates an extended history of hydrogen escape and desiccation of the planet. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars.
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  Data: <searchLink fieldCode="AR" term="%22Mahaffy%2C+P%2E+R%2E%22">Mahaffy, P. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Webster%2C+C%2E+R%2E%22">Webster, C. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Stern%2C+J%2E+C%2E%22">Stern, J. C.</searchLink><br /><searchLink fieldCode="AR" term="%22Brunner%2C+A%2E+E%2E%22">Brunner, A. E.</searchLink><br /><searchLink fieldCode="AR" term="%22Atreya%2C+S%2E+K%2E%22">Atreya, S. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Conrad%2C+P%2E+G%2E%22">Conrad, P. G.</searchLink><br /><searchLink fieldCode="AR" term="%22Domagal-Goldman%2C+S%2E%22">Domagal-Goldman, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Eigenbrode%2C+J%2E+L%2E%22">Eigenbrode, J. L.</searchLink><br /><searchLink fieldCode="AR" term="%22Flesch%2C+G%2E+J%2E%22">Flesch, G. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Christensen%2C+L%2E+E%2E%22">Christensen, L. E.</searchLink><br /><searchLink fieldCode="AR" term="%22Franz%2C+H%2E+B%2E%22">Franz, H. B.</searchLink><br /><searchLink fieldCode="AR" term="%22Freissinet%2C+C%2E%22">Freissinet, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Glavin%2C+D%2E+P%2E%22">Glavin, D. P.</searchLink><br /><searchLink fieldCode="AR" term="%22Grotzinger%2C+J%2E+P%2E%22">Grotzinger, J. P.</searchLink><br /><searchLink fieldCode="AR" term="%22Jones%2C+J%2E+H%2E%22">Jones, J. H.</searchLink><br /><searchLink fieldCode="AR" term="%22Leshin%2C+L%2E+A%2E%22">Leshin, L. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Malespin%2C+C%2E%22">Malespin, C.</searchLink><br /><searchLink fieldCode="AR" term="%22McAdam%2C+A%2E+C%2E%22">McAdam, A. C.</searchLink><br /><searchLink fieldCode="AR" term="%22Ming%2C+D%2E+W%2E%22">Ming, D. W.</searchLink><br /><searchLink fieldCode="AR" term="%22Navarro-Gonzalez%2C+R%2E%22">Navarro-Gonzalez, R.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 1/23/2015, Vol. 347 Issue 6220, p412-414. 3p.
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  Data: The deuterium-to-hydrogen (D/H) ratio in strongly bound water or hydroxyl groups in ancient martian clays retains the imprint of the water of formation of these minerals. Curiosity's Sample Analysis at Mars (SAM) experiment measured thermally evolved water and hydrogen gas released between 550° and 950°C from samples of Hesperian-era Gale crater smectite to determine this isotope ratio. The D/H value is 3.0 (®0.2) times the ratio in standard mean ocean water. The D/H ratio in this ~3-billion-year-old mudstone, which is half that of the present martian atmosphere but substantially higher than that expected in very early Mars, indicates an extended history of hydrogen escape and desiccation of the planet. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=100585209
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        Value: 10.1126/science.1260291
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        Text: English
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      – SubjectFull: Water on Mars
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