Evidence for calcium carbonate at the mars phoenix landing site

W. V. Boynton; D. W. Ming; S. P. Kounaves; S. M.M. Young; R. E. Arvidson; M. H. Hecht; J. Hoffman; P. B. Niles; D. K. Hamara; R. C. Quinn; P. H. Smith; B. Sutter; D. C. Catling; R. V. Morris

doi:10.1126/science.1172768

Evidence for calcium carbonate at the mars phoenix landing site

W. V. Boynton, D. W. Ming, S. P. Kounaves, S. M.M. Young, R. E. Arvidson, M. H. Hecht, J. Hoffman, P. B. Niles, D. K. Hamara, R. C. Quinn, P. H. Smith, B. Sutter, D. C. Catling, R. V. Morris

Research output: Contribution to journal › Article › peer-review

298 Scopus citations

Abstract

Carbonates are generally products of aqueous processes and may hold important clues about the history of liquid water on the surface of Mars. Calcium carbonate (approximately 3 to 5 weight percent) has been identified in the soils around the Phoenix landing site by scanning calorimetry showing an endothermic transition beginning around 725°C accompanied by evolution of carbon dioxide and by the ability of the soil to buffer pH against acid addition. Based on empirical kinetics, the amount of calcium carbonate is most consistent with formation in the past by the interaction of atmospheric carbon dioxide with liquid water films on particle surfaces.

Original language	English (US)
Pages (from-to)	61-64
Number of pages	4
Journal	Science
Volume	325
Issue number	5936
DOIs	https://doi.org/10.1126/science.1172768
State	Published - Jul 3 2009
Externally published	Yes

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title = "Evidence for calcium carbonate at the mars phoenix landing site",

abstract = "Carbonates are generally products of aqueous processes and may hold important clues about the history of liquid water on the surface of Mars. Calcium carbonate (approximately 3 to 5 weight percent) has been identified in the soils around the Phoenix landing site by scanning calorimetry showing an endothermic transition beginning around 725°C accompanied by evolution of carbon dioxide and by the ability of the soil to buffer pH against acid addition. Based on empirical kinetics, the amount of calcium carbonate is most consistent with formation in the past by the interaction of atmospheric carbon dioxide with liquid water films on particle surfaces.",

author = "Boynton, {W. V.} and Ming, {D. W.} and Kounaves, {S. P.} and Young, {S. M.M.} and Arvidson, {R. E.} and Hecht, {M. H.} and J. Hoffman and Niles, {P. B.} and Hamara, {D. K.} and Quinn, {R. C.} and Smith, {P. H.} and B. Sutter and Catling, {D. C.} and Morris, {R. V.}",

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T1 - Evidence for calcium carbonate at the mars phoenix landing site

AU - Boynton, W. V.

AU - Ming, D. W.

AU - Kounaves, S. P.

AU - Young, S. M.M.

AU - Arvidson, R. E.

AU - Hecht, M. H.

AU - Hoffman, J.

AU - Niles, P. B.

AU - Hamara, D. K.

AU - Quinn, R. C.

AU - Smith, P. H.

AU - Sutter, B.

AU - Catling, D. C.

AU - Morris, R. V.

PY - 2009/7/3

Y1 - 2009/7/3

N2 - Carbonates are generally products of aqueous processes and may hold important clues about the history of liquid water on the surface of Mars. Calcium carbonate (approximately 3 to 5 weight percent) has been identified in the soils around the Phoenix landing site by scanning calorimetry showing an endothermic transition beginning around 725°C accompanied by evolution of carbon dioxide and by the ability of the soil to buffer pH against acid addition. Based on empirical kinetics, the amount of calcium carbonate is most consistent with formation in the past by the interaction of atmospheric carbon dioxide with liquid water films on particle surfaces.

AB - Carbonates are generally products of aqueous processes and may hold important clues about the history of liquid water on the surface of Mars. Calcium carbonate (approximately 3 to 5 weight percent) has been identified in the soils around the Phoenix landing site by scanning calorimetry showing an endothermic transition beginning around 725°C accompanied by evolution of carbon dioxide and by the ability of the soil to buffer pH against acid addition. Based on empirical kinetics, the amount of calcium carbonate is most consistent with formation in the past by the interaction of atmospheric carbon dioxide with liquid water films on particle surfaces.

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Evidence for calcium carbonate at the mars phoenix landing site

Abstract

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