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{Bristow:2018:10.1126/sciadv.aar3330,
author = {Bristow, TF and Rampe, EB and Achilles, CN and Blake, DF and Chipera, SJ and Craig, P and Crisp, JA and Des, Marais DJ and Downs, RT and Gellert, R and Grotzinger, JP and Gupta, S and Hazen, RM and Horgan, B and Hogancamp, JV and Mangold, N and Mahaffy, PR and McAdam, AC and Ming, DW and Morookian, JM and Morris, RV and Morrison, SM and Treiman, AH and Vaniman, DT and Vasavada, AR and Yen, AS},
doi = {10.1126/sciadv.aar3330},
journal = {Science Advances},
title = {Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars.},
url = {http://dx.doi.org/10.1126/sciadv.aar3330},
volume = {4},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Clay minerals provide indicators of the evolution of aqueous conditions and possible habitats for life on ancient Mars. Analyses by the Mars Science Laboratory rover Curiosity show that ~3.5-billion year (Ga) fluvio-lacustrine mudstones in Gale crater contain up to ~28 weight % (wt %) clay minerals. We demonstrate that the species of clay minerals deduced from x-ray diffraction and evolved gas analysis show a strong paleoenvironmental dependency. While perennial lake mudstones are characterized by Fe-saponite, we find that stratigraphic intervals associated with episodic lake drying contain Al-rich, Fe3+-bearing dioctahedral smectite, with minor (3 wt %) quantities of ferripyrophyllite, interpreted as wind-blown detritus, found in candidate aeolian deposits. Our results suggest that dioctahedral smectite formed via near-surface chemical weathering driven by fluctuations in lake level and atmospheric infiltration, a process leading to the redistribution of nutrients and potentially influencing the cycling of gases that help regulate climate.
AU  - Bristow,TF
AU  - Rampe,EB
AU  - Achilles,CN
AU  - Blake,DF
AU  - Chipera,SJ
AU  - Craig,P
AU  - Crisp,JA
AU  - Des,Marais DJ
AU  - Downs,RT
AU  - Gellert,R
AU  - Grotzinger,JP
AU  - Gupta,S
AU  - Hazen,RM
AU  - Horgan,B
AU  - Hogancamp,JV
AU  - Mangold,N
AU  - Mahaffy,PR
AU  - McAdam,AC
AU  - Ming,DW
AU  - Morookian,JM
AU  - Morris,RV
AU  - Morrison,SM
AU  - Treiman,AH
AU  - Vaniman,DT
AU  - Vasavada,AR
AU  - Yen,AS
DO  - 10.1126/sciadv.aar3330
PY  - 2018///
TI  - Clay mineral diversity and abundance in sedimentary rocks of Gale crater, Mars.
T2  - Science Advances
UR  - http://dx.doi.org/10.1126/sciadv.aar3330
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29881776
UR  - http://hdl.handle.net/10044/1/60714
VL  - 4
ER  -
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