Imperial College London
Professor Sanjeev Gupta

ProfessorSanjeevGupta

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Earth Science
 
 
 
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Contact

 

+44 (0)20 7594 6527s.gupta

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Treiman:2016:10.1002/2015JE004932,
author = {Treiman, AH and Bish, DL and Vaniman, DT and Chipera, SJ and Blake, DF and Ming, DW and Morris, RV and Bristow, TF and Morrison, SM and Baker, MB and Rampe, EB and Downs, RT and Filiberto, J and Glazner, AF and Gellert, R and Thompson, LM and Schmidt, ME and Le, Deit L and Wiens, RC and McAdam, AC and Achilles, CN and Edgett, KS and Farmer, JD and Fendrich, KV and Grotzinger, JP and Gupta, S and Morookian, JM and Newcombe, ME and Rice, MS and Spray, JG and Stolper, EM and Sumner, DY and Vasavada, AR and Yen, AS},
doi = {10.1002/2015JE004932},
journal = {Journal of Geophysical Research: Planets},
pages = {75--106},
title = {Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater)},
url = {http://dx.doi.org/10.1002/2015JE004932},
volume = {121},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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.
AU  - Treiman,AH
AU  - Bish,DL
AU  - Vaniman,DT
AU  - Chipera,SJ
AU  - Blake,DF
AU  - Ming,DW
AU  - Morris,RV
AU  - Bristow,TF
AU  - Morrison,SM
AU  - Baker,MB
AU  - Rampe,EB
AU  - Downs,RT
AU  - Filiberto,J
AU  - Glazner,AF
AU  - Gellert,R
AU  - Thompson,LM
AU  - Schmidt,ME
AU  - Le,Deit L
AU  - Wiens,RC
AU  - McAdam,AC
AU  - Achilles,CN
AU  - Edgett,KS
AU  - Farmer,JD
AU  - Fendrich,KV
AU  - Grotzinger,JP
AU  - Gupta,S
AU  - Morookian,JM
AU  - Newcombe,ME
AU  - Rice,MS
AU  - Spray,JG
AU  - Stolper,EM
AU  - Sumner,DY
AU  - Vasavada,AR
AU  - Yen,AS
DO  - 10.1002/2015JE004932
EP  - 106
PY  - 2016///
SN  - 2169-9100
SP  - 75
TI  - Mineralogy, provenance, and diagenesis of a potassic basaltic sandstone on Mars: CheMin X-ray diffraction of the Windjana sample (Kimberley area, Gale Crater)
T2  - Journal of Geophysical Research: Planets
UR  - http://dx.doi.org/10.1002/2015JE004932
UR  - http://hdl.handle.net/10044/1/32751
VL  - 121
ER  -
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