Imperial College London
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Emeritus ProfessorLidiaLonergan

Faculty of Engineering, Department of Earth Science & Engineering

Emeritus Reader of Geotectonics
 
 
 
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Contact

 

+44 (0)20 7594 6465l.lonergan Website

 
 
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Location

 

3.48Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Pizzi:2023:10.1111/bre.12707,
author = {Pizzi, M and Whittaker, AC and Mayall, M and Lonergan, L},
doi = {10.1111/bre.12707},
journal = {Basin Research},
pages = {141--171},
title = {Structural controls on the pathways and sedimentary architecture of submarine channels: New constraints from the Niger Delta},
url = {http://dx.doi.org/10.1111/bre.12707},
volume = {35},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In submarine settings, the growth of structurally influenced topography can play a decisive role in controlling the routing of sediments from shelf-edge to deep water, and can determine depositional architectures and sediment characteristics. Here we use well-constrained examples from the deep water Niger Delta, where gravity-driven deformation has resulted in the development of a large fold and thrust belt, to illustrate how spatial and temporal variations in the rate of deformation have controlled the nature and locus of contrasting depositional styles. Published work in the study area using 3D seismic data has quantified the growth history of the thrust-related folds at multiple locations using line-length-balancing, enabling cumulative strain for individual structures over time and along-strike to be obtained. We integrate this information with seismic interpretation and facies analysis, focusing on the interval of maximum deformation (15 to 3.7 Ma), where maximum strain rates reached 7%/Ma. Within this interval, we observe a vertical change in depositional architecture where: (1) leveed-confined and linear channels pass upward in to (2) ponded lobes with erosionally confined channels and finally (3) channelised sheets. Our analysis demonstrate that this change is tectonically induced and diachronous across the fault array, and we characterise the extent to which structural growth controls both the distribution and the architecture of the turbidite deposits in such settings. In particular, we show that leveed-confined channels exist when they can exploit strain minima between growing faults or at their lateral tips. Conversely, as a result of fault linkage and increased strain rates submarine channels become erosional and may be forced to cross folds at their strain maxima (crests), where their pathways are influenced by across-strike variations in shortening for individual structures. Our results enable us to propose new conceptual models of submarine channel d
AU  - Pizzi,M
AU  - Whittaker,AC
AU  - Mayall,M
AU  - Lonergan,L
DO  - 10.1111/bre.12707
EP  - 171
PY  - 2023///
SN  - 0950-091X
SP  - 141
TI  - Structural controls on the pathways and sedimentary architecture of submarine channels: New constraints from the Niger Delta
T2  - Basin Research
UR  - http://dx.doi.org/10.1111/bre.12707
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000862318900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://onlinelibrary.wiley.com/doi/10.1111/bre.12707
UR  - http://hdl.handle.net/10044/1/100419
VL  - 35
ER  -
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