Imperial College London
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Professor Christopher Jackson

Faculty of Engineering, Department of Earth Science & Engineering

Visiting Professor
 
 
 
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Contact

 

c.jackson Website

 
 
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Location

 

1.46ARoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Pichel:2018:10.1016/j.jsg.2018.07.016,
author = {Pichel, LM and Peel, FJ and Jackson, CA-L and Huuse, M},
doi = {10.1016/j.jsg.2018.07.016},
journal = {Journal of Structural Geology},
pages = {208--230},
title = {Geometry and kinematics of salt-detached ramp syncline basins},
url = {http://dx.doi.org/10.1016/j.jsg.2018.07.016},
volume = {115},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Ramp-syncline basins (RSBs) are characterized by asymmetric depocentres formed by translation above salt detachments with basal steps. Recognition of these minibasins allows quantification of the magnitude and rates of overburden translation above a deforming salt layer. 3D seismic data from the São Paulo Plateau, Santos Basin, Brazil image a series of RSBs formed above thick salt, and distributed above and/or basinward of pronounced base-salt steps. The RSBs are composed of landward-dipping and gently folded sigmoidal strata, recording 28–32km of SE-directed translation during the Late Cretaceous and Paleocene, at an average rate of 0.8–0.9mm/year. We present several examples of RSBs, in addition to results from numerical forward models, to analyse the 3D kinematics of RSBs and their interaction with base-salt structures. The RSBs form not only by translation above basinward-dipping ramps, but also over landward-dipping ramps. Translation over stepped ramps generates stacked RSBs. Thickness maps show translation is higher at the centre of RSBs and that depocentres become progressively more affected by diapirism as they evolve. This study presents the first analysis of the 3D kinematics of ramp-syncline basins, and the first documentation of their occurrence above thick salt in the Santos Basin, Brazil. It applies realistic numerical models that treat the detachment as a volume of viscous material, improving our understanding of these systems. RSBs are important to understand slope and deep-basin tectono-stratigraphic architecture of supra-salt units and can also guide the identification of pre-salt structures, thus contributing to the exploration of salt basins.
AU  - Pichel,LM
AU  - Peel,FJ
AU  - Jackson,CA-L
AU  - Huuse,M
DO  - 10.1016/j.jsg.2018.07.016
EP  - 230
PY  - 2018///
SN  - 0191-8141
SP  - 208
TI  - Geometry and kinematics of salt-detached ramp syncline basins
T2  - Journal of Structural Geology
UR  - http://dx.doi.org/10.1016/j.jsg.2018.07.016
UR  - https://www.sciencedirect.com/science/article/pii/S0191814118300592
VL  - 115
ER  -
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