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Carbonates on Mars Colin Dundas Ge/Ay 132
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Outline Significance of carbonates Carbonate spectra Recent results concerning carbonates on Mars
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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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(Christensen et al 2001)
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(Bandfield et al 2003)
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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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