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Carbonates on Mars Colin Dundas Ge/Ay 132. Outline Significance of carbonates Carbonate spectra Recent results concerning carbonates on Mars.

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Presentation on theme: "Carbonates on Mars Colin Dundas Ge/Ay 132. Outline Significance of carbonates Carbonate spectra Recent results concerning carbonates on Mars."— Presentation transcript:

1 Carbonates on Mars Colin Dundas Ge/Ay 132

2 Outline Significance of carbonates Carbonate spectra Recent results concerning carbonates on Mars

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4 Detecting Carbonates Carbonates (e.g. CaCO 3 ) have several vibrational absorptions in the infrared. The fundamentals ν 2 and ν 3 give lines at around 890 and 1540 cm -1 for most carbonates. Combinations and overtones are not generally used for spectroscopy; the two fundamentals are distinctive.

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6 (Christensen et al 2001)

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8 (Bandfield et al 2003)

9 Results and Conclusions There are no large carbonate formations currently exposed on the Martian surface. Martian dust appears to contain a few percent of carbonates by weight. How this relates to the overall crust is uncertain. If the dust is close to representative of the upper crust, several bars of CO 2 could be stored in carbonates.


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