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Examining natural rock varnish and weathering rinds with laser-induced breakdown spectroscopy for application to ChemCam on Mars |
Applied Optics, Vol. 51, Issue 7, pp. B74-B82 (2012)
http://dx.doi.org/10.1364/AO.51.000B74
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Abstract
A laser-induced breakdown spectroscopy (LIBS) instrument is traveling to Mars as part of ChemCam on the Mars Science Laboratory rover. Martian rocks have weathered exteriors that obscure their bulk compositions. We examine weathered rocks with LIBS in a martian atmosphere to improve interpretations of ChemCam rock analyses on Mars. Profile data are analyzed using principal component analysis, and coatings and rinds are examined using scanning electron microscopy and electron probe microanalysis. Our results show that LIBS is sensitive to minor compositional changes with depth and correctly identifies rock type even if the series of laser pulses does not penetrate to unweathered material.
© 2012 Optical Society of America
OCIS Codes
(110.0180) Imaging systems : Microscopy
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(240.6490) Optics at surfaces : Spectroscopy, surface
(280.1545) Remote sensing and sensors : Chemical analysis
(120.6085) Instrumentation, measurement, and metrology : Space instrumentation
(300.6365) Spectroscopy : Spectroscopy, laser induced breakdown
History
Original Manuscript: October 3, 2011
Revised Manuscript: January 17, 2012
Manuscript Accepted: January 17, 2012
Published: February 10, 2012
Citation
Nina L. Lanza, Samuel M. Clegg, Roger C. Wiens, Rhonda E. McInroy, Horton E. Newsom, and Matthew D. Deans, "Examining natural rock varnish and weathering rinds with laser-induced breakdown spectroscopy for application to ChemCam on Mars," Appl. Opt. 51, B74-B82 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-7-B74
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