A habitable fluvio-lacustrine environment at Yellowknife Bay, Gale Crater, Mars

J.P. Grotzinger*, D.Y. Sumner, L.C. Kah, K. Stack, S. Gupta, L. Edgar, D. Rubin, K. Lewis, J. Schieber, N. Mangold, R. Milliken, P.G. Conrad, D. DesMarais, J. Farmer, K. Siebach, F. Calef III, J. Hurowitz, S.M. McLennan, D. Ming, D. VanimanJ. Crisp, A. Vasavada, K.S. Edgett, M. Malin, D. Blake, R. Gellert, P. Mahaffy, R.C. Wiens, S. Maurice, J.A. Grant, S Wilson, R. C. Anderson, L. Beegle, R. Arvidson, Bernard Hallet, Ronald Sletten, M. Rice, J.F. Bell III, J. Griffes, B. Ehlmann, R.B. Anderson, T.F. Bristow, W. E. Dietrich, G. Dromart, J. Eigenbrode, A. Fraeman, C. Hardgrove, Ken Herkenhoff, L. Jandura, MSL Science Team

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

728 Citations (Scopus)

Abstract

The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian biosphere founded on chemolithoautotrophy. This aqueous environment was characterized by neutral pH, low salinity, and variable redox states of both iron and sulfur species. Carbon, hydrogen, oxygen, sulfur, nitrogen, and phosphorus were measured directly as key biogenic elements; by inference, phosphorus is assumed to have been available. The environment probably had a minimum duration of hundreds to tens of thousands of years. These results highlight the biological viability of fluvial-lacustrine environments in the post-Noachian history of Mars.
Original languageEnglish
Article number1242777
Number of pages15
JournalScience
Volume343
Issue number6169
Early online date9 Dec 2013
DOIs
Publication statusPublished - 24 Jan 2014

Bibliographical note

We are indebted to the MSL Project engineering and management teams for their exceptionally skilled and diligent efforts in making the mission as effective as possible and enhancing science operations. We are also grateful to all those MSL Science Team members who participated in tactical and strategic operations. Without the support of both the engineering and science teams, the data presented here could not have been collected. Some of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. Data presented in this paper are archived in the Planetary Data System

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