Detection of Carbonates on Asteroids

Details Detection of Carbonates on Asteroids Detection of Carbonates on Asteroids

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.3207r&link_type=abstract

American Astronomical Society, DPS meeting #41, #32.07

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Scientific paper

Carbonate minerals are found in carbonaceous chondrite meteorites in abundances of up to several percent [1]. While on Earth they are commonly the result of biological activity, they are interpreted as aqueous alteration products when found in meteorites [2]. Absorption bands due to carbonates have been detected on Ceres in both the 3-µm region (near 3.3-3.4 µm and near 3.8-3.9 µm) in data taken at the NASA IRTF and in some mid-IR data taken with the KAO [3], providing some of the first quantitative mineralogical information for that object. I will report preliminary indications that Ceres is not the only object in the asteroid belt with spectral evidence of carbonates. Both Ceres-like and Pallas-like objects have been found with carbonates, suggesting that they are not limited to a few unusual objects. In addition, I will show evidence for carbonates on Ceres based on SpeX prism mode (0.8-2.5 µm) spectra. This work was supported by the NASA Planetary Astronomy program. References: [1] Rubin, Met. Plan. Sci. (1997). [2] Brearley (2006), in MESS II, U. Ariz Press, Tucson. [3] Rivkin et al. Icarus (2006).

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