HR: 0800h
AN: P21C-0164    [Abstracts]
TI: The Use of the Thermal Infrared Region for Studying the Chemistry and Hydration State of Sulfates on Mars
AU: * Lane, M D
EM: lane@psi.edu
AF: Planetary Science Institute, 1700 E. Fort Lowell Rd., Ste. 106, Tucson, AZ 85719 United States
AU: Bishop, J L
EM: jbishop@arc.nasa.gov
AF: SETI Institute/NASA-Ames Research Center, 515 N. Whisman Rd., Mountain View, CA 94560 United States
AU: Dyar, M D
EM: mdyar@mtholyoke.edu
AF: Mount Holyoke College, 50 College Street, South Hadley, MA 01075 United States
AB: The thermal infrared spectral region is useful for determining the chemistry and the hydration state of sulfates. Spectral absorption features related to the vibrations of the sulfate anion are modified by the constituent cation in the sulfate mineral as well as the hydration state. Hydration of the sulfates also can cause additional spectral features related to the vibrational modes of the water in the mineral structure. Laboratory analyses will be presented to show these variations and the results will be applied to the NE Meridiani and Aram Chaos regions of Mars using TES and THEMIS data to identify the sulfates that are present and the implications for their formational environment. We also are studying the visible-near infrared and Moessbauer spectral properties of these sulfate minerals in order to correlate our interpretations of various Martian datasets.
DE: 3929 NMR, Mossbauer spectroscopy, and other magnetic techniques
DE: 3934 Optical, infrared, and Raman spectroscopy
DE: 5410 Composition (1060, 3672)
DE: 5464 Remote sensing
DE: 6225 Mars
SC: Planetary Sciences [P]
MN: Fall Meeting 2005