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In situ radiometric and exposure age dating of the martian surface.

Farley, K A and Malespin, C and Mahaffy, P and Grotzinger, J P and Vasconcelos, P M and Milliken, R E and Malin, M and Edgett, K S and Pavlov, A A and Hurowitz, J A and Grant, J A and Miller, H B and Arvidson, R and Beegle, L and Calef, F and Conrad, P G and Dietrich, W E and Eigenbrode, J and Gellert, R and Gupta, S and Hamilton, V and Hassler, D M and Lewis, K W and McLennan, S M and Ming, D and Navarro-González, R and Schwenzer, S P and Steele, A and Stolper, E M and Sumner, D Y and Vaniman, D and Vasavada, A and Williford, K and Wimmer-Schweingruber, R F and the MSL Science Team and DLR Collaborator, Reitz G (2013) In situ radiometric and exposure age dating of the martian surface. Science, 343 (6169), p. 1247166. American Association for the Advancement of Science (AAAS). DOI: 10.1126/science.1247166 ISSN 0036-8075

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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 billion years represents a mixture of detrital and authigenic components and confirms the expected antiquity of rocks comprising the crater rim. Cosmic-ray-produced (3)He, (21)Ne, and (36)Ar yield concordant surface exposure ages of 78 ± 30 million years. 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.

Item URL in elib:https://elib.dlr.de/88305/
Document Type:Article
Title:In situ radiometric and exposure age dating of the martian surface.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Farley, K ADivision of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.UNSPECIFIED
Malespin, CUNSPECIFIEDUNSPECIFIED
Mahaffy, PUNSPECIFIEDUNSPECIFIED
Grotzinger, J PUNSPECIFIEDUNSPECIFIED
Vasconcelos, P MUNSPECIFIEDUNSPECIFIED
Milliken, R EUNSPECIFIEDUNSPECIFIED
Malin, MUNSPECIFIEDUNSPECIFIED
Edgett, K SUNSPECIFIEDUNSPECIFIED
Pavlov, A AUNSPECIFIEDUNSPECIFIED
Hurowitz, J AUNSPECIFIEDUNSPECIFIED
Grant, J AUNSPECIFIEDUNSPECIFIED
Miller, H BUNSPECIFIEDUNSPECIFIED
Arvidson, RUNSPECIFIEDUNSPECIFIED
Beegle, LUNSPECIFIEDUNSPECIFIED
Calef, FUNSPECIFIEDUNSPECIFIED
Conrad, P GUNSPECIFIEDUNSPECIFIED
Dietrich, W EUNSPECIFIEDUNSPECIFIED
Eigenbrode, JUNSPECIFIEDUNSPECIFIED
Gellert, RUNSPECIFIEDUNSPECIFIED
Gupta, SUNSPECIFIEDUNSPECIFIED
Hamilton, VUNSPECIFIEDUNSPECIFIED
Hassler, D MUNSPECIFIEDUNSPECIFIED
Lewis, K WUNSPECIFIEDUNSPECIFIED
McLennan, S MUNSPECIFIEDUNSPECIFIED
Ming, DUNSPECIFIEDUNSPECIFIED
Navarro-González, RUNSPECIFIEDUNSPECIFIED
Schwenzer, S PUNSPECIFIEDUNSPECIFIED
Steele, AUNSPECIFIEDUNSPECIFIED
Stolper, E MUNSPECIFIEDUNSPECIFIED
Sumner, D YUNSPECIFIEDUNSPECIFIED
Vaniman, DUNSPECIFIEDUNSPECIFIED
Vasavada, AUNSPECIFIEDUNSPECIFIED
Williford, KUNSPECIFIEDUNSPECIFIED
Wimmer-Schweingruber, R F and the MSL Science TeamUNSPECIFIEDUNSPECIFIED
DLR Collaborator, Reitz GRadiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIED
Date:2013
Journal or Publication Title:Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:343
DOI :10.1126/science.1247166
Page Range:p. 1247166
Publisher:American Association for the Advancement of Science (AAAS)
ISSN:0036-8075
Status:Published
Keywords:Mars, MSL, Curiosity rover, mudstone, Gale Crater
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben MSL-Radiation
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:19 Feb 2014 11:01
Last Modified:08 Mar 2018 18:51

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