Initial results from the Mini-TES experiment in Gusev crater from the Spirit rover

Philip Christensen, Steven Ruff, R. L. Fergason, A. T. Knudson, S. Anwar, R. E. Arvidson, J. L. Bandfield, D. L. Blaney, C. Budney, W. M. Calvin, T. D. Glotch, M. P. Golombek, N. Gorelick, T. G. Graff, V. E. Hamilton, A. Hayes, J. R. Johnson, H. Y. McSween, G. L. Mehall, L. K. MehallJ. E. Moersch, R. V. Morris, A. D. Rogers, M. D. Smith, S. W. Squyres, M. J. Wolff, M. B. Wyatt

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124 Scopus citations

Abstract

The 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 olivine-rich 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 μm in hollows to ∼0.5 to 3 mm in soils.

Original languageEnglish (US)
Pages (from-to)837-842
Number of pages6
JournalScience
Volume305
Issue number5685
DOIs
StatePublished - Aug 6 2004

ASJC Scopus subject areas

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    Christensen, P., Ruff, S., Fergason, R. L., Knudson, A. T., Anwar, S., Arvidson, R. E., Bandfield, J. L., Blaney, D. L., Budney, C., Calvin, W. M., Glotch, T. D., Golombek, M. P., Gorelick, N., Graff, T. G., Hamilton, V. E., Hayes, A., Johnson, J. R., McSween, H. Y., Mehall, G. L., ... Wyatt, M. B. (2004). Initial results from the Mini-TES experiment in Gusev crater from the Spirit rover. Science, 305(5685), 837-842. https://doi.org/10.1126/science.1100564