Trace element geochemistry (Li, Ba, Sr, and Rb) using Curiosity's ChemCam: early results for Gale crater from Bradbury Landing Site to Rocknest

Ollila, Ann M., Newsom, Horton E., Clark III, Benton, Wiens, Roger C., Cousin, Agnes, Blank, Jen G., Mangold, Nicolas, Sautter, Violaine, Maurice, Sylvestre, Clegg, Samuel M., Gasnault, Olivier, Forni, Olivier, Tokar, Robert, Lewin, Eric, Dyar, M. Darby, Lasue, Jeremie, Anderson, Ryan, McLennan, Scott M., Bridges, John, Vaniman, Dave, Lanza, Nina, Fabre, Cecile, Melikechi, Noureddine, Perrett, Glynis M., Campbell, John L., King, Penelope L., Barraclough, Bruce, Delapp, Dorothea, Johnstone, Stephen, Meslin, Pierre-Yves, Rosen-Gooding, Anya, Williams, Josh, The MSL Science Team and Vasconcelos, Paulo (2014) Trace element geochemistry (Li, Ba, Sr, and Rb) using Curiosity's ChemCam: early results for Gale crater from Bradbury Landing Site to Rocknest. Journal of Geophysical Research: Planets, 119 (Early View) 1-31. doi:10.1002/2013JE004517

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Author Ollila, Ann M.
Newsom, Horton E.
Clark III, Benton
Wiens, Roger C.
Cousin, Agnes
Blank, Jen G.
Mangold, Nicolas
Sautter, Violaine
Maurice, Sylvestre
Clegg, Samuel M.
Gasnault, Olivier
Forni, Olivier
Tokar, Robert
Lewin, Eric
Dyar, M. Darby
Lasue, Jeremie
Anderson, Ryan
McLennan, Scott M.
Bridges, John
Vaniman, Dave
Lanza, Nina
Fabre, Cecile
Melikechi, Noureddine
Perrett, Glynis M.
Campbell, John L.
King, Penelope L.
Barraclough, Bruce
Delapp, Dorothea
Johnstone, Stephen
Meslin, Pierre-Yves
Rosen-Gooding, Anya
Williams, Josh
The MSL Science Team
Vasconcelos, Paulo
Title Trace element geochemistry (Li, Ba, Sr, and Rb) using Curiosity's ChemCam: early results for Gale crater from Bradbury Landing Site to Rocknest
Formatted title
Trace element geochemistry (Li, Ba, Sr, and Rb) using Curiosity's ChemCam: early results for Gale crater from Bradbury Landing Site to Rocknest
Journal name Journal of Geophysical Research: Planets   Check publisher's open access policy
ISSN 1934-8592
2169-9100
Publication date 2014-01-31
Sub-type Article (original research)
DOI 10.1002/2013JE004517
Open Access Status DOI
Volume 119 (Early View)
Start page 1
End page 31
Total pages 31
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
[1] The ChemCam instrument package on the Mars rover, Curiosity, provides new capabilities to probe the abundances of certain trace elements in the rocks and soils on Mars using the laser-induced breakdown spectroscopy technique. We focus on detecting and quantifying Li, Ba, Rb, and Sr in targets analyzed during the first 100 sols, from Bradbury Landing Site to Rocknest. Univariate peak area models and multivariate partial least squares models are presented. Li, detected for the first time directly on Mars, is generally low (<15 ppm). The lack of soil enrichment in Li, which is highly fluid mobile, is consistent with limited influx of subsurface waters contributing to the upper soils. Localized enrichments of up to ~60 ppm Li have been observed in several rocks but the host mineral for Li is unclear. Bathurst_Inlet is a fine-grained bedrock unit in which several analysis locations show a decrease in Li and other alkalis with depth, which may imply that the unit has undergone low-level aqueous alteration that has preferentially drawn the alkalis to the surface. Ba (~1000 ppm) was detected in a buried pebble in the Akaitcho sand ripple and it appears to correlate with Si, Al, Na, and K, indicating a possible feldspathic composition. Rb and Sr are in the conglomerate Link at abundances >100 ppm and >1000 ppm, respectively. These analysis locations tend to have high Si and alkali abundances, consistent with a feldspar composition. Together, these trace element observations provide possible evidence of magma differentiation and aqueous alteration.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article first published online: 31 JAN 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Non HERDC
 
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Created: Thu, 13 Feb 2014, 00:59:01 EST by Jon Swabey on behalf of School of Earth Sciences