Imperial College London
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Professor Gary Hampson

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Sedimentary Geology
 
 
 
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Contact

 

+44 (0)20 7594 6475g.j.hampson Website

 
 
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Location

 

1.42Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sahoo:2020:10.1130/G47236.1,
author = {Sahoo, H and Gani, MR and Gani, ND and Hampson, G and Howell, JA and Storms, JEA and Martinius, AW and Buckley, SJ},
doi = {10.1130/G47236.1},
journal = {Geology (Boulder)},
pages = {903--907},
title = {Predictable patterns in stacking and distribution of channelized fluvial sandbodies linked to channel mobility and avulsion process},
url = {http://dx.doi.org/10.1130/G47236.1},
volume = {48},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Despite  the  importance  of  channel  avulsion  in constructing fluvial  stratigraphy, it  is unclear how  contrasting  avulsion  processes are  reflected  instratigraphic-stacking patterns of channelized fluvial sandbodies, asa proxy for how riverdepocentersshifted in time and space. Using an integrated, geospatially-referenced 3D dataset that includesoutcrop, core, and LiDAR data,  we identify for  the  first  time  in an  outcropstudy a  predictive relationship  between channelized-sandbodyarchitecture,  paleochannel  mobility, and stratigraphic-stacking pattern. Single-story  sandbodies tend  to  occur  in  vertically-stacked  clusters  that  are  capped  by  a multilateral  sandbody,  indicating an  upward  change  from  a  fixed-channelsystem to  a  mobile-hannelsystem in each cluster.Vertical sandbody stacking in the clusters implies reoccupation of abandoned channelsafter “local” avulsion.Reoccupational  avulsion  may  reflect  channel confinement, location downstream of a nodal avulsion point that maintained its position during development  of  the  sandbody  cluster,  and/or  aggradation  and  progradation  of  a  backwater-mediated  channel  downstream  of  a  nodal  avulsion  point. Sandbody  clusters  and  additional multilateral    sandbodies    are    laterallyoffset    or    isolated    from    each    other, implying compensational  stackingdue  to “regional” switching  of  a  nodal  avulsion  point to anew, topographically-lowersite    on    the    floodplain.The    predictive    links    between avulsion mechanisms,  channel  mobility,and  resultant sandbody distributions  and  stacking  patterns shown  in  our  findings  haveimportant  implications  forexploringand  interpreting spatio-temporal patterns of stratigraphic organizationin alluvial basins.
AU  - Sahoo,H
AU  - Gani,MR
AU  - Gani,ND
AU  - Hampson,G
AU  - Howell,JA
AU  - Storms,JEA
AU  - Martinius,AW
AU  - Buckley,SJ
DO  - 10.1130/G47236.1
EP  - 907
PY  - 2020///
SN  - 0091-7613
SP  - 903
TI  - Predictable patterns in stacking and distribution of channelized fluvial sandbodies linked to channel mobility and avulsion process
T2  - Geology (Boulder)
UR  - http://dx.doi.org/10.1130/G47236.1
UR  - https://pubs.geoscienceworld.org/gsa/geology/article/48/9/903/586792/Predictable-patterns-in-stacking-and-distribution
UR  - http://hdl.handle.net/10044/1/78923
VL  - 48
ER  -
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