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Initial results from the Mini-TES experiment in Gusev Crater from the Spirit RoverThe Miniature Thermal Emission Spectrometer (Mini-TES) on Spirit has studied the mineralogy and thermophysical properties at Gusev crater. Undisturbed soil spectra show evidence for minor carbonates and bound water. Rocks are olivinerich basalts with varying degrees of dust and other coatings. Dark-toned soils observed on disturbed surfaces may be derived from rocks and have derived mineralogy (+/-5 to 10%) of 45% pyroxene (20% Ca-rich pyroxene and 25% pigeonite), 40% sodic to intermediate plagioclase, and 15% olivine (forsterite 45% +/-5 to 10). Two spectrally distinct coatings are observed on rocks, a possible indicator of the interaction of water, rock, and airfall dust. Diurnal temperature data indicate particle sizes from 40 to 80 microm in hollows to approximately 0.5 to 3 mm in soils.
Document ID
20050151394
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Christensen, P. R. (Arizona State University Tempe, AZ 85287, United States)
Ruff, S. W. (Arizona State Univ. Tempe, AZ, United States)
Fergason, R. L. (Arizona State Univ. Tempe, AZ, United States)
Knudson, A. T. (Arizona State Univ. Tempe, AZ, United States)
Anwar, S. (Arizona State Univ. Tempe, AZ, United States)
Arvidson, R. E. (Washington Univ. Saint Louis, MO, United States)
Bandfield, J. L. (Arizona State Univ. Tempe, AZ, United States)
Blaney, D. L. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Budney, C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Calvin, W. M. (Nevada Univ. Reno, NV, United States)
Glotch, T. D. (Arizona State Univ. Tempe, AZ, United States)
Golombek, M. P. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gorelick, N. (Arizona State Univ. Tempe, AZ, United States)
Graff, T. G. (Arizona State Univ. Tempe, AZ, United States)
Hamilton, V. E. (Hawaii Univ. Honolulu, HI, United States)
Hayes, A. (Cornell Univ. Ithaca, NY, United States)
Johnson, J. R. (Geological Survey Flagstaff, AZ, United States)
McSween, H. Y. Jr (Tennessee Univ. Knoxville, TN, United States)
Mehall, G. L. (Arizona State Univ. Tempe, AZ, United States)
Mehall, L. K. (Arizona State Univ. Tempe, AZ, United States)
Moersch, J. E. (Tennessee Univ. Knoxville, TN, United States)
Morris, R. V. (NASA Johnson Space Center Houston, TX, United States)
Rogers, A. D. (Arizona State Univ. Tempe, AZ, United States)
Smith, M. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Squyres, S. W. (Cornell Univ. Ithaca, NY, United States)
Date Acquired
August 23, 2013
Publication Date
August 6, 2004
Publication Information
Publication: Science
Volume: 305
Issue: 5685
ISSN: 0036-8075
Subject Category
Lunar and Planetary Science and Exploration
Distribution Limits
Public
Copyright
Other