Imperial College London
Portrait Picture

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{Erdi:2021:10.1111/bre.12539,
author = {Erdi, A and Jackson, CA},
doi = {10.1111/bre.12539},
journal = {Basin Research},
pages = {1880--1905},
title = {What controls saltdetached contraction in the translational domain of the outer Kwanza Basin, offshore Angola?},
url = {http://dx.doi.org/10.1111/bre.12539},
volume = {33},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - It is now wellestablished that basesalt relief drives complex deformation patterns in the midslope domain of saltbearing passive margins, in a location classically thought to be dominated by simple horizontal translation. However, due to a lack of detailed studies drawing on highquality, 3D seismic reflection data, our understanding of how basesalt relief controls fourdimensional patterns of saltrelated deformation in natural systems remains poor. We here use 3D seismic reflection data from, and structural restorations of the Outer Kwanza Basin, offshore Angola to examine the controls on the evolution of variably oriented salt anticlines, rollers, and walls, and related normal and reverse faults. We show that the complex geometries and kinematics of predominantly contractional salt structures reflect up to 22 km of seaward flow of salt and its overburden across prominent basesalt relief. More specifically, this contractional deformation occurs where the seaward flow of salt is inhibited due to: (a) it flowing being forced to flow up, landwarddipping ramps; (b) it encountering thicker, slowermoving salt near the base of seawarddipping ramps; or (c) the formation of primary salt welds at the upper hinge of seawarddipping ramps. The rate at which salt and its overburden translates seaward varies along strike due to corresponding variations in the magnitude of basesalt relief and, at a larger, more regional scale, primary salt thickness. As a result of these alongstrike changes in translation rate, overburden rotation accompanies bulk contraction. Our study improves our understanding of saltrelated deformation on passive margins, highlighting the key role of basesalt relief, and showing contraction, extension and rotation are fundamental processes controlling the structural style of the midslope translational domains of salt basins.
AU  - Erdi,A
AU  - Jackson,CA
DO  - 10.1111/bre.12539
EP  - 1905
PY  - 2021///
SN  - 0950-091X
SP  - 1880
TI  - What controls saltdetached contraction in the translational domain of the outer Kwanza Basin, offshore Angola?
T2  - Basin Research
UR  - http://dx.doi.org/10.1111/bre.12539
UR  - https://onlinelibrary.wiley.com/doi/10.1111/bre.12539
UR  - http://hdl.handle.net/10044/1/86472
VL  - 33
ER  -
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