Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater) - Archive ouverte HAL Access content directly
Journal Articles Journal of Geophysical Research: Planets Year : 2016

Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater)

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Allan H. Treiman
  • Function : Author
David L. Bish
  • Function : Author
David T. Vaniman
  • Function : Author
Steve J. Chipera
  • Function : Author
David F. Blake
  • Function : Author
Doug W. Ming
  • Function : Author
Richard V. Morris
  • Function : Author
Thomas F. Bristow
  • Function : Author
Shaunna M. Morrison
  • Function : Author
Michael B. Baker
  • Function : Author
Elizabeth B. Rampe
  • Function : Author
Robert T. Downs
  • Function : Author
Justin Filiberto
  • Function : Author
Allen F. Glazner
  • Function : Author
Ralf Gellert
  • Function : Author
Lucy M. Thompson
  • Function : Author
Mariek E. Schmidt
  • Function : Author
Roger C. Wiens
  • Function : Author
Amy C. Mcadam
  • Function : Author
Cherie N. Achilles
  • Function : Author
Kenneth S. Edgett
  • Function : Author
Jack D. Farmer
  • Function : Author
Kim V. Fendrich
  • Function : Author
John P. Grotzinger
  • Function : Author
Sanjeev Gupta
  • Function : Author
John Michael Morookian
  • Function : Author
Megan E. Newcombe
  • Function : Author
Melissa S. Rice
  • Function : Author
John G. Spray
  • Function : Author
Edward M. Stolper
  • Function : Author
Dawn Y. Sumner
  • Function : Author
Ashwin R. Vasavada
  • Function : Author
Albert S. Yen
  • Function : Author

Abstract

The Windjana drill sample, a sandstone of the Dillinger member (Kimberley formation, Gale Crater, Mars), was analyzed by CheMin X-ray diffraction (XRD) in the MSL Curiosity rover. From Rietveld refinements of its XRD pattern, Windjana contains the following: sanidine (21% weight, ~Or95); augite (20%); magnetite (12%); pigeonite; olivine; plagioclase; amorphous and smectitic material (~25%); and percent levels of others including ilmenite, fluorapatite, and bassanite. From mass balance on the Alpha Proton X-ray Spectrometer (APXS) chemical analysis, the amorphous material is Fe rich with nearly no other cations—like ferrihydrite. The Windjana sample shows little alteration and was likely cemented by its magnetite and ferrihydrite. From ChemCam Laser-Induced Breakdown Spectrometer (LIBS) chemical analyses, Windjana is representative of the Dillinger and Mount Remarkable members of the Kimberley formation. LIBS data suggest that the Kimberley sediments include at least three chemical components. The most K-rich targets have 5.6% K2O, ~1.8 times that of Windjana, implying a sediment component with >40% sanidine, e.g., a trachyte. A second component is rich in mafic minerals, with little feldspar (like a shergottite). A third component is richer in plagioclase and in Na2O, and is likely to be basaltic. The K-rich sediment component is consistent with APXS and ChemCam observations of K-rich rocks elsewhere in Gale Crater. The source of this sediment component was likely volcanic. The presence of sediment from many igneous sources, in concert with Curiosity's identifications of other igneous materials (e.g., mugearite), implies that the northern rim of Gale Crater exposes a diverse igneous complex, at least as diverse as that found in similar-age terranes on Earth.
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insu-03682691 , version 1 (31-05-2022)

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Attribution - NonCommercial - ShareAlike - CC BY 4.0

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Allan H. Treiman, David L. Bish, David T. Vaniman, Steve J. Chipera, David F. Blake, et al.. Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater). Journal of Geophysical Research: Planets, 2016, 121, pp.75-106. ⟨10.1002/2015JE004932⟩. ⟨insu-03682691⟩
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