11:30 AM - 11:45 AM
[PPS06-10] Applications of infrared nano-spectroscopy for carbonaceous chondrites: To understand organic-mineral interactions during aqueous alteration
Keywords:Meteorites, Infrared spectroscopy
We prepared ultramicrotomed thin sections of Murchison and Bells meteorites, as well as antigorite that was baked at 500 oC for 4 hours as a contamination control, since the IR absorption spectroscopy is susceptible to contamination from volatile organic matter . We confirmed that both methods have at least 50-nm special resolutions. In the IR imaging, we observed that overlapping of regions that absorb 3400 cm−1 corresponding to OH and 2920 cm−1 corresponding to aliphatic CH, indicating association of organic matter with phyllosilicates. Such association is well known previously but in ~1 µm spatial resolutions [2, 3, 8]. We will further discuss parent body processes inferred from nano-scale IR imaging of Murchison and Bells meteorites.
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