NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Oxidation Of Manganese At Kimberley, Gale Crater: More Free Oxygen In Mars' Past?High Mn concentrations provide unique indicators of water-rich environments and their redox state. Very high-potential oxidants are required to oxidize Mn to insoluble, high-valence oxides that can precipitate and concentrate Mn in rocks and sediments; these redox potentials are much higher than those needed to oxidize Fe or S. Consequently, Mn-rich rocks on Earth closely track the rise of atmospheric oxygen. Given the association between Mn-rich rocks and the redox state of surface environments, observations of anomalous Mn enrichments on Mars raise similar questions about redox history, solubility and aqueous transport, and availability as a metabolic substrate. Our observations suggest that at least some of the high Mn present in Gale crater occurs in the form of Mn-oxides filling veins that crosscut sand-stones, requiring post-depositional precipitation as highly oxidizing fluids moved through the fractured strata after their deposition and lithification.
Document ID
20150002842
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Lanza, N. L. (Los Alamos National Lab. NM, United States)
Wiens, R. C. (Los Alamos National Lab. NM, United States)
Arvidson, R. E. (Washington Univ. Saint Louis, MO, United States)
Clark, B. C. (Space Science Inst. Boulder, CO, United States)
Fischer, W. W. (California Inst. of Tech. Pasadena, CA, United States)
Gellert, R. (Guelph Univ. Ontario, Canada)
Grotzinger, J. P. (California Inst. of Tech. Pasadena, CA, United States)
Hurowitz, J. A. (Stony Brook Univ. Stony Brook, NY, United States)
McLennan, S. M. (Stony Brook Univ. Stony Brook, NY, United States)
Morris, R. V. (NASA Johnson Space Center Houston, TX, United States)
Rice, M. S. (University of Western Washington Bellingham, WA, United States)
Bell, J. F., III (Arizona State Univ. Tempe, AZ, United States)
Berger, J. A. (University of Western Ontario London, Ontario, Canada)
Blaney, D. L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bridges, N. T. (Johns Hopkins Univ. Laurel, MD, United States)
Calef, F., III (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Campbell, J. L. (Guelph Univ. Ontario, Canada)
Clegg, S. M. (Los Alamos National Lab. NM, United States)
Cousin, A. (Los Alamos National Lab. NM, United States)
Edgett, K. S. (Malin Space Science Systems San Diego, CA, United States)
Fabre, C. (Universite de Lorraine Nancy, France)
Fisk, M. R. (Oregon State Univ. Corvallis, OR, United States)
Forni, O. (Institut de Recherche en Astrophysique et Planetologie (UMR) Toulouse, France)
Frydenvang, J. (Niels Bohr Inst. Copenhagen, Denmark)
Ming, D. W. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
March 12, 2015
Publication Date
March 16, 2015
Subject Category
Chemistry And Materials (General)
Lunar And Planetary Science And Exploration
Report/Patent Number
JSC-CN-32872
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 16, 2015
End Date: March 20, 2015
Sponsors: Lunar and Planetary Inst., NASA Johnson Space Center, Universities Space Research Association
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available