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{Edgett:2020:10.1130/ges02244.1,
author = {Edgett, KS and Banham, SG and Bennett, KA and Edgar, LA and Edwards, CS and Fairén, AG and Fedo, CM and Fey, DM and Garvin, JB and Grotzinger, JP and Gupta, S and Henderson, MJ and House, CH and Mangold, N and McLennan, SM and Newsom, HE and Rowland, SK and Siebach, KL and Thompson, L and VanBommel, SJ and Wiens, RC and Williams, RME and Yingst, RA},
doi = {10.1130/ges02244.1},
journal = {Geosphere},
title = {Extraformational sediment recycling on Mars},
url = {http://dx.doi.org/10.1130/ges02244.1},
volume = {16},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Extraformational sediment recycling (old sedimentary rock to new sedimentary rock) is a fundamental aspect of Earth’s geological record; tectonism exposes sedimentary rock, whereupon it is weathered and eroded to form new sediment that later becomes lithified. On Mars, tectonism has been minor, but two decades of orbiter instrument–based studies show that some sedimentary rocks previously buried to depths of kilometers have been exposed, by erosion, at the surface. Four locations in Gale crater, explored using the National Aeronautics and Space Administration’s Curiosity rover, exhibit sedimentary lithoclasts in sedimentary rock: At Marias Pass, they are mudstone fragments in sandstone derived from strata below an erosional unconformity; at Bimbe, they are pebble-sized sandstone and, possibly, laminated, intraclast-bearing, chemical (calcium sulfate) sediment fragments in conglomerates; at Cooperstown, they are pebble-sized fragments of sandstone within coarse sandstone; at Dingo Gap, they are cobble-sized, stratified sandstone fragments in conglomerate derived from an immediately underlying sandstone. Mars orbiter images show lithified sediment fans at the termini of canyons that incise sedimentary rock in Gale crater; these, too, consist of recycled, extraformational sediment. The recycled sediments in Gale crater are compositionally immature, indicating the dominance of physical weathering processes during the second known cycle. The observations at Marias Pass indicate that sediment eroded and removed from craters such as Gale crater during the Martian Hesperian Period could have been recycled to form new rock elsewhere. Our results permit prediction that lithified deltaic sediments at the Perseverance (landing in 2021) and Rosalind Franklin (landing in 2023) rover field sites could contain extraformational recycled sediment.
AU  - Edgett,KS
AU  - Banham,SG
AU  - Bennett,KA
AU  - Edgar,LA
AU  - Edwards,CS
AU  - Fairén,AG
AU  - Fedo,CM
AU  - Fey,DM
AU  - Garvin,JB
AU  - Grotzinger,JP
AU  - Gupta,S
AU  - Henderson,MJ
AU  - House,CH
AU  - Mangold,N
AU  - McLennan,SM
AU  - Newsom,HE
AU  - Rowland,SK
AU  - Siebach,KL
AU  - Thompson,L
AU  - VanBommel,SJ
AU  - Wiens,RC
AU  - Williams,RME
AU  - Yingst,RA
DO  - 10.1130/ges02244.1
PY  - 2020///
SN  - 1553-040X
TI  - Extraformational sediment recycling on Mars
T2  - Geosphere
UR  - http://dx.doi.org/10.1130/ges02244.1
UR  - https://pubs.geoscienceworld.org/gsa/geosphere/article/doi/10.1130/GES02244.1/591698/Extraformational-sediment-recycling-on-Mars
UR  - http://hdl.handle.net/10044/1/83454
VL  - 16
ER  -
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