IR reflectance spectra of pristine Antarctic CM chondrites to characterize Marco Polo-R mission target
Abstract
The hydrated groups of carbonaceous chondrites (hereafter CCs) exhibit different degrees of aqueous alteration. Primary minerals were transformed in their parent bodies by the action of the water. Most of the water was probably accreted as ice or bounded in hydrated minerals. Moderate heating associated with residual radioactivity or collisional compaction released that water to soak temporarily the materials forming these asteroids. Evidence for static and dynamic aqueous mineral products has been described [1, 2], at the same time that the different degrees of alteration exhibited for members of the CM group were characterized [3, 4]. We apply here a new IR spectroscopic technique that allows to assess the amount of adsorbed water present in minerals forming carbonaceous chondrites.
- Publication:
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European Planetary Science Congress 2012
- Pub Date:
- September 2012
- Bibcode:
- 2012epsc.conf..192T