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{Doughty-Jones:2017:10.1306/01111716046,
author = {Doughty-Jones, G and Mayall, M and Lonergan, L},
doi = {10.1306/01111716046},
journal = {AAPG Bulletin},
pages = {1879--1904},
title = {Stratigraphy, facies and evolution of deep-water lobe complexes within a salt-controlled intra-slope mini-basin},
url = {http://dx.doi.org/10.1306/01111716046},
volume = {101},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A succession of four deep-water  lobe complexes deposited within a salt-controlled minibasin have  been  imaged  in  unprecedented  detail  on  high  resolution,  high  frequency  3D  seismic reflection data.  The ponded interval was deposited over approximately 2.7 m.y. and consists of four discrete sequences, each of which contains one lobe complex.  There is a systematic change  in  the  shape  and  orientation  of  the  lobe  complexes  through  time:  the  two  older  lobe complexes are oriented broadly north-south and are up to 10 km (6.2 mi) long by 5 km (3.1 mi) wide, whereas the youngest lobe complexes are oriented southeast-northwest and have a rounder shape (9 km (5.6 mi) long by 8 km (5 mi) wide).  The north to south migration of the feeder channel entry point and the change in lobe complex orientation is attributed to growth of the basin-bounding salt structures. Each  lobe  complex  is  composed  of  a  feeder  channel,  multiple  individual  lobes  formed  of  a trunk channel and a diverging network of smaller distributary channels, commonly fringed by a  high  amplitude  band.    The  lobes  are  on  average  1.6  km  (1  mi)  long  by  1.3  km    (0.8  mi) wide and are fed by trunk channels that range from 60 m (197 ft) to 200 m (656 ft) wide, with thicknesses  up  to  15  m  (49 ft).  Variation  in  lobe  shape  and  spatial  location  is  driven  by  the response  of  the  lobes  to  topographic  growth  along  the  edge  of  the  basin  and  as  well  as inherited seabed relief generated by previous lobe growth.  In areas where lobe development is  constrained  by  structural  growth  along  the  edge  of  the  basin  the  lobes  become  elongated and divert away from the growing topography.   Lobe complexes of similar scales have been described in detail in outcrops and in unconfined settings on the seafloor but this is the first study to describe these systems in such detail in the subsurface,  resolving  the  individual  lobes  and  lobe  elem
AU  - Doughty-Jones,G
AU  - Mayall,M
AU  - Lonergan,L
DO  - 10.1306/01111716046
EP  - 1904
PY  - 2017///
SN  - 0149-1423
SP  - 1879
TI  - Stratigraphy, facies and evolution of deep-water lobe complexes within a salt-controlled intra-slope mini-basin
T2  - AAPG Bulletin
UR  - http://dx.doi.org/10.1306/01111716046
UR  - http://hdl.handle.net/10044/1/48568
VL  - 101
ER  -
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