Imperial College London
Professor Sanjeev Gupta

ProfessorSanjeevGupta

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Earth Science
 
 
 
//

Contact

 

+44 (0)20 7594 6527s.gupta

 
 
//

Location

 

Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Rampe:2017:10.1016/j.epsl.2017.04.021,
author = {Rampe, EB and Ming, DW and Blake, DF and Bristow, TF and Chipera, SJ and Grotzinger, JP and Morris, RV and Morrison, SM and Vaniman, DT and Yen, AS and Achilles, CN and Craig, PI and Marais, DJD and Downs, RT and Farmer, JD and Fendrich, KV and Gellert, R and Hazen, RM and Kah, LC and Morookianh, JM and Peretyazhko, TS and Sarrazin, P and Treiman, AH and Berger, JA and Eigenbrode, J and Fairen, AG and Forni, O and Gupta, S and Hurowitz, JA and Lanza, NL and Schmidt, ME and Siebach, K and Sutter, B and Thompson, LM},
doi = {10.1016/j.epsl.2017.04.021},
journal = {EARTH AND PLANETARY SCIENCE LETTERS},
pages = {172--185},
title = {Mineralogy of an ancient lacustrine mudstone succession from the Murray formation, Gale crater, Mars},
url = {http://dx.doi.org/10.1016/j.epsl.2017.04.021},
volume = {471},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The Mars Science Laboratory Curiosity rover has been traversing strata at the base of Aeolis Mons (informally known as Mount Sharp) since September 2014. The Murray formation makes up the lowest exposed strata of the Mount Sharp group and is composed primarily of finely laminated lacustrine mudstone intercalated with rare crossbedded sandstone that is prodeltaic or fluvial in origin. We report on the first three drilled samples from the Murray formation, measured in the Pahrump Hills section. Rietveld refinements and FULLPAT full pattern fitting analyses of X-ray diffraction patterns measured by the MSL CheMin instrument provide mineral abundances, refined unit-cell parameters for major phases giving crystal chemistry, and abundances of X-ray amorphous materials. Our results from the samples measured at the Pahrump Hills and previously published results on the Buckskin sample measured from the Marias Pass section stratigraphically above Pahrump Hills show stratigraphic variations in the mineralogy; phyllosilicates, hematite, jarosite, and pyroxene are most abundant at the base of the Pahrump Hills, and crystalline and amorphous silica and magnetite become prevalent higher in the succession. Some trace element abundances measured by APXS also show stratigraphic trends; Zn and Ni are highly enriched with respect to average Mars crust at the base of the Pahrump Hills (by 7.7 and 3.7 times, respectively), and gradually decrease in abundance in stratigraphically higher regions near Marias Pass, where they are depleted with respect to average Mars crust (by more than an order of magnitude in some targets). The Mn stratigraphic trend is analogous to Zn and Ni, however, Mn abundances are close to those of average Mars crust at the base of Pahrump Hills, rather than being enriched, and Mn becomes increasingly depleted moving upsection. Minerals at the base of the Pahrump Hills, in particular jarosite and hematite, as well as enrichments in Zn, Ni, and Mn, are products of aci
AU  - Rampe,EB
AU  - Ming,DW
AU  - Blake,DF
AU  - Bristow,TF
AU  - Chipera,SJ
AU  - Grotzinger,JP
AU  - Morris,RV
AU  - Morrison,SM
AU  - Vaniman,DT
AU  - Yen,AS
AU  - Achilles,CN
AU  - Craig,PI
AU  - Marais,DJD
AU  - Downs,RT
AU  - Farmer,JD
AU  - Fendrich,KV
AU  - Gellert,R
AU  - Hazen,RM
AU  - Kah,LC
AU  - Morookianh,JM
AU  - Peretyazhko,TS
AU  - Sarrazin,P
AU  - Treiman,AH
AU  - Berger,JA
AU  - Eigenbrode,J
AU  - Fairen,AG
AU  - Forni,O
AU  - Gupta,S
AU  - Hurowitz,JA
AU  - Lanza,NL
AU  - Schmidt,ME
AU  - Siebach,K
AU  - Sutter,B
AU  - Thompson,LM
DO  - 10.1016/j.epsl.2017.04.021
EP  - 185
PY  - 2017///
SN  - 0012-821X
SP  - 172
TI  - Mineralogy of an ancient lacustrine mudstone succession from the Murray formation, Gale crater, Mars
T2  - EARTH AND PLANETARY SCIENCE LETTERS
UR  - http://dx.doi.org/10.1016/j.epsl.2017.04.021
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000403625300017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/51997
VL  - 471
ER  -
Download