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{Davis:2021:10.1130/g48971.1,
author = {Davis, JM and Grindrod, PM and Banham, SG and Warner, NH and Conway, SJ and Boazman, SJ and Gupta, S},
doi = {10.1130/g48971.1},
journal = {Geology},
pages = {1250--1254},
title = {A record of syn-tectonic sedimentation revealed by perched alluvial fan deposits in Valles Marineris, Mars},
url = {http://dx.doi.org/10.1130/g48971.1},
volume = {49},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - On Mars, basins formed by tectonic processes are rare and mostly have unconstrained subsidence histories. One method for understanding this record of subsidence is through associated alluvial fans, which are sourced from uplifted areas and accumulate in downthrown basins. The source, morphology, and superposition of fan deposits can be used to reconstruct fault kinematics, the relative timing of accommodation space formation, and, in turn, the influence tectonic processes had on Martian fan formation. Here we use high-resolution orbital data sets to characterize sediment fan deposits associated with syn-tectonic sedimentation in two regions of the Valles Marineris canyons: Coprates Chasma and Juventae Chasma. These deposits comprise sediment fans on the current canyon floor and low-gradient surfaces perched several kilometers above the canyon floor. We interpret the low-gradient surfaces as remnant sediment fan deposits, which originally formed at the former canyon floor and have since been offset due to normal faulting. The preservation of vertically offset generations of sediment fan deposits supports a progressive, basinward migration of fault activity into the original hanging wall or repeat activity along a fault zone. Each episode of faulting was followed by a basinward shift in drainages, which led to fault-scarp degradation and formation of a new generation of fans. Multiple episodes of syn-tectonic sedimentation occurred during the evolution of the basins, with fluvial activity sporadically active. Our results demonstrate, for the first time on Mars, that depositional cyclicity was linked to tectonic deformation, possibly representative of regional processes throughout Valles Marineris.
AU  - Davis,JM
AU  - Grindrod,PM
AU  - Banham,SG
AU  - Warner,NH
AU  - Conway,SJ
AU  - Boazman,SJ
AU  - Gupta,S
DO  - 10.1130/g48971.1
EP  - 1254
PY  - 2021///
SN  - 0091-7613
SP  - 1250
TI  - A record of syn-tectonic sedimentation revealed by perched alluvial fan deposits in Valles Marineris, Mars
T2  - Geology
UR  - http://dx.doi.org/10.1130/g48971.1
UR  - https://pubs.geoscienceworld.org/gsa/geology/article/doi/10.1130/G48971.1/604584/A-record-of-syn-tectonic-sedimentation-revealed-by
UR  - http://hdl.handle.net/10044/1/90417
VL  - 49
ER  -
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