In situ radiometric and exposure age dating of the Martian surface

Farley, K. A., Malespin, C., Mahaffy, P., Grotzinger, J. P., Vasconcelos, P. M., Milliken, R. E., Malin, M., Edgett, K. S., Pavlov, A. A., Hurowitz, J. A., Grant, J. A., Miller, H. B., Arvidson, R., Beegle, L., Calef, F., Conrad, P. G., Dietrich, W. E., Eigenbrode, J., Gellert, R., Gupta, S., Hamilton, V., Hassler, D. M., Lewis, K. W., McLennan, S. M., Ming, D., Navarro-González, R., Schwenzer, S. P., Steele, A., Stolper, E. M., Sumner, D. Y., Vaniman, D., Vasavada, A., Williford, K., Wimmer-Schweingruber, R. F., MSL Science Team and Vasconcelos, Paulo (2014) In situ radiometric and exposure age dating of the Martian surface. Science, 343 6169: 1247166.1-1247166.9. doi:10.1126/science.1247166

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Author Farley, K. A.
Malespin, C.
Mahaffy, P.
Grotzinger, J. P.
Vasconcelos, P. M.
Milliken, R. E.
Malin, M.
Edgett, K. S.
Pavlov, A. A.
Hurowitz, J. A.
Grant, J. A.
Miller, H. B.
Arvidson, R.
Beegle, L.
Calef, F.
Conrad, P. G.
Dietrich, W. E.
Eigenbrode, J.
Gellert, R.
Gupta, S.
Hamilton, V.
Hassler, D. M.
Lewis, K. W.
McLennan, S. M.
Ming, D.
Navarro-González, R.
Schwenzer, S. P.
Steele, A.
Stolper, E. M.
Sumner, D. Y.
Vaniman, D.
Vasavada, A.
Williford, K.
Wimmer-Schweingruber, R. F.
MSL Science Team
Vasconcelos, Paulo
Title In situ radiometric and exposure age dating of the Martian surface
Journal name Science   Check publisher's open access policy
ISSN 0036-8075
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1126/science.1247166
Open Access Status Not yet assessed
Volume 343
Issue 6169
Start page 1247166.1
End page 1247166.9
Total pages 9
Place of publication Washington, DC, United States
Publisher American Association for the Advancement of Science
Language eng
Formatted abstract
We determined radiogenic and cosmogenic noble gases in a mudstone on the floor of Gale crater. A K-Ar age of 4.21 ± 0.35 Ga represents a mixture of detrital and authigenic components, and confirms the expected antiquity of rocks comprising the crater rim. Cosmic-ray-produced 3He, 21Ne, and 36Ar yield concordant surface exposure ages of 78 ± 30 Ma. Surface exposure occurred mainly in the present geomorphic setting rather than during primary erosion and transport. Our observations are consistent with mudstone deposition shortly after the Gale impact, or possibly in a later event of rapid erosion and deposition. The mudstone remained buried until recent exposure by wind-driven scarp retreat. Sedimentary rocks exposed by this mechanism may thus offer the best potential for organic biomarker preservation against destruction by cosmic radiation.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published Online December 9 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 78 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 86 times in Scopus Article | Citations
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Created: Fri, 20 Dec 2013, 00:21:51 EST by Jon Swabey on behalf of School of Earth Sciences