Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database
Abstract
The ChemCam Laser-Induced Breakdown Spectroscopy (LIBS) instrument onboard the Mars Science Laboratory (MSL) rover Curiosity has obtained > 300,000 spectra of rock and soil analysis targets since landing at Gale Crater in 2012, and the spectra represent perhaps the largest publicly-available LIBS datasets. The compositions of the major elements, reported as oxides, have been re-calibrated using a laboratory LIBS instrument, Mars-like atmospheric conditions, and a much larger set of standards (408) that span a wider compositional range than previously employed. The new calibration uses a combination of partial least squares (PLS1) and Independent Component Analysis (ICA) algorithms, together with a calibration transfer matrix to minimize differences between the conditions under which the standards were analyzed in the laboratory and the conditions on Mars. While the previous model provided good results in the compositional range near the average Mars surface composition, the new model fits the extreme compositions far better. Examples are given for plagioclase feldspars, where silicon was previously significantly over-estimated, and for calcium-sulfate veins, where silicon compositions near zero were inaccurate. Here, the uncertainties of major element abundances are described as a function of the abundances, and are overall significantly lower than the previous model, enabling important new geochemicalmore »
- Authors:
- more »
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- National Aeronautics and Space Administration (NASA); USDOE
- OSTI Identifier:
- 1338777
- Report Number(s):
- LA-UR-16-21569
Journal ID: ISSN 0584-8547
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Spectrochimica Acta. Part B, Atomic Spectroscopy
- Additional Journal Information:
- Journal Volume: 129; Journal Issue: C; Journal ID: ISSN 0584-8547
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; Planetary Sciences
Citation Formats
Clegg, Samuel M., Wiens, Roger C., Anderson, Ryan, Forni, Olivier, Frydenvang, Jens, Lasue, Jeremie, Cousin, Agnes, Payré, Valérie, Boucher, Tommy, Dyar, M. Darby, McLennan, Scott M., Morris, Richard V., Graff, Trevor G., Mertzman, Stanley A., Ehlmann, Bethany L., Belgacem, Ines, Newsom, Horton, Clark, Ben C., Melikechi, Noureddine, Mezzacappa, Alissa, McInroy, Rhonda E., Martinez, Ronald, Gasda, Patrick, Gasnault, Olivier, and Maurice, Sylvestre. Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database. United States: N. p., 2016.
Web. doi:10.1016/j.sab.2016.12.003.
Clegg, Samuel M., Wiens, Roger C., Anderson, Ryan, Forni, Olivier, Frydenvang, Jens, Lasue, Jeremie, Cousin, Agnes, Payré, Valérie, Boucher, Tommy, Dyar, M. Darby, McLennan, Scott M., Morris, Richard V., Graff, Trevor G., Mertzman, Stanley A., Ehlmann, Bethany L., Belgacem, Ines, Newsom, Horton, Clark, Ben C., Melikechi, Noureddine, Mezzacappa, Alissa, McInroy, Rhonda E., Martinez, Ronald, Gasda, Patrick, Gasnault, Olivier, & Maurice, Sylvestre. Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database. United States. https://doi.org/10.1016/j.sab.2016.12.003
Clegg, Samuel M., Wiens, Roger C., Anderson, Ryan, Forni, Olivier, Frydenvang, Jens, Lasue, Jeremie, Cousin, Agnes, Payré, Valérie, Boucher, Tommy, Dyar, M. Darby, McLennan, Scott M., Morris, Richard V., Graff, Trevor G., Mertzman, Stanley A., Ehlmann, Bethany L., Belgacem, Ines, Newsom, Horton, Clark, Ben C., Melikechi, Noureddine, Mezzacappa, Alissa, McInroy, Rhonda E., Martinez, Ronald, Gasda, Patrick, Gasnault, Olivier, and Maurice, Sylvestre. 2016.
"Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database". United States. https://doi.org/10.1016/j.sab.2016.12.003. https://www.osti.gov/servlets/purl/1338777.
@article{osti_1338777,
title = {Recalibration of the Mars Science Laboratory ChemCam instrument with an expanded geochemical database},
author = {Clegg, Samuel M. and Wiens, Roger C. and Anderson, Ryan and Forni, Olivier and Frydenvang, Jens and Lasue, Jeremie and Cousin, Agnes and Payré, Valérie and Boucher, Tommy and Dyar, M. Darby and McLennan, Scott M. and Morris, Richard V. and Graff, Trevor G. and Mertzman, Stanley A. and Ehlmann, Bethany L. and Belgacem, Ines and Newsom, Horton and Clark, Ben C. and Melikechi, Noureddine and Mezzacappa, Alissa and McInroy, Rhonda E. and Martinez, Ronald and Gasda, Patrick and Gasnault, Olivier and Maurice, Sylvestre},
abstractNote = {The ChemCam Laser-Induced Breakdown Spectroscopy (LIBS) instrument onboard the Mars Science Laboratory (MSL) rover Curiosity has obtained > 300,000 spectra of rock and soil analysis targets since landing at Gale Crater in 2012, and the spectra represent perhaps the largest publicly-available LIBS datasets. The compositions of the major elements, reported as oxides, have been re-calibrated using a laboratory LIBS instrument, Mars-like atmospheric conditions, and a much larger set of standards (408) that span a wider compositional range than previously employed. The new calibration uses a combination of partial least squares (PLS1) and Independent Component Analysis (ICA) algorithms, together with a calibration transfer matrix to minimize differences between the conditions under which the standards were analyzed in the laboratory and the conditions on Mars. While the previous model provided good results in the compositional range near the average Mars surface composition, the new model fits the extreme compositions far better. Examples are given for plagioclase feldspars, where silicon was previously significantly over-estimated, and for calcium-sulfate veins, where silicon compositions near zero were inaccurate. Here, the uncertainties of major element abundances are described as a function of the abundances, and are overall significantly lower than the previous model, enabling important new geochemical interpretations of the data.},
doi = {10.1016/j.sab.2016.12.003},
url = {https://www.osti.gov/biblio/1338777},
journal = {Spectrochimica Acta. Part B, Atomic Spectroscopy},
issn = {0584-8547},
number = C,
volume = 129,
place = {United States},
year = {Sat Dec 24 00:00:00 EST 2016},
month = {Sat Dec 24 00:00:00 EST 2016}
}
Web of Science
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