Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes
Three-dimensional seismic datasets have provided unrivalled insights into magma flow within sub-volcanic systems. One of the key revelations is that sills appear to be constructed of a series of discrete magma lobes that form during the emplacement of magma into host-rock. We focus on a large sill,...
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Online Access: | http://hdl.handle.net/2440/72704 https://doi.org/10.1144/0016-76492011-150 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/72704 2023-12-24T10:23:09+01:00 Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes Schofield, N. Heaton, L. Holford, S. Archer, S. Jackson, C. Jolley, D. 2012 http://hdl.handle.net/2440/72704 https://doi.org/10.1144/0016-76492011-150 en eng Geological Soc Publ House Journal of the Geological Society, 2012; 169(4):421-426 0016-7649 2041-479X http://hdl.handle.net/2440/72704 doi:10.1144/0016-76492011-150 Holford, S. [0000-0002-4524-8822] © The Geological Society of London http://dx.doi.org/10.1144/0016-76492011-150 Journal article 2012 ftunivadelaidedl https://doi.org/10.1144/0016-76492011-150 2023-11-27T23:22:01Z Three-dimensional seismic datasets have provided unrivalled insights into magma flow within sub-volcanic systems. One of the key revelations is that sills appear to be constructed of a series of discrete magma lobes that form during the emplacement of magma into host-rock. We focus on a large sill, within the Faroe–Shetland Basin, North Atlantic, that is well imaged on seismic data, and identify the presence of ‘broken bridges’ within the sill, developed between elongate magma lobes, and reveal for the first time in three dimensions the development of broken bridges. Critically, by relating the imaged structures to key outcrop-scale examples we confirm that bridge and broken-bridge structures are oriented perpendicular to the magma flow direction. This work thus demonstrates a key link that can be made between seismic-scale investigation of intrusions and sub-seismic (outcrop-scale) processes, highlighting the seemingly scale-invariant nature of the magmatic emplacement process. Nick Schofield, Lucy Heaton, Simon P. Holford, Stuart G. Archer, Christopher A.-L. Jackson and David W. Jolley Article in Journal/Newspaper North Atlantic The University of Adelaide: Digital Library Archer ENVELOPE(162.867,162.867,-76.850,-76.850) Journal of the Geological Society 169 4 421 426 |
institution |
Open Polar |
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The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
description |
Three-dimensional seismic datasets have provided unrivalled insights into magma flow within sub-volcanic systems. One of the key revelations is that sills appear to be constructed of a series of discrete magma lobes that form during the emplacement of magma into host-rock. We focus on a large sill, within the Faroe–Shetland Basin, North Atlantic, that is well imaged on seismic data, and identify the presence of ‘broken bridges’ within the sill, developed between elongate magma lobes, and reveal for the first time in three dimensions the development of broken bridges. Critically, by relating the imaged structures to key outcrop-scale examples we confirm that bridge and broken-bridge structures are oriented perpendicular to the magma flow direction. This work thus demonstrates a key link that can be made between seismic-scale investigation of intrusions and sub-seismic (outcrop-scale) processes, highlighting the seemingly scale-invariant nature of the magmatic emplacement process. Nick Schofield, Lucy Heaton, Simon P. Holford, Stuart G. Archer, Christopher A.-L. Jackson and David W. Jolley |
format |
Article in Journal/Newspaper |
author |
Schofield, N. Heaton, L. Holford, S. Archer, S. Jackson, C. Jolley, D. |
spellingShingle |
Schofield, N. Heaton, L. Holford, S. Archer, S. Jackson, C. Jolley, D. Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
author_facet |
Schofield, N. Heaton, L. Holford, S. Archer, S. Jackson, C. Jolley, D. |
author_sort |
Schofield, N. |
title |
Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
title_short |
Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
title_full |
Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
title_fullStr |
Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
title_full_unstemmed |
Seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
title_sort |
seismic imaging of 'broken bridges': linking seismic to outcrop-scale investigations of intrusive magma lobes |
publisher |
Geological Soc Publ House |
publishDate |
2012 |
url |
http://hdl.handle.net/2440/72704 https://doi.org/10.1144/0016-76492011-150 |
long_lat |
ENVELOPE(162.867,162.867,-76.850,-76.850) |
geographic |
Archer |
geographic_facet |
Archer |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://dx.doi.org/10.1144/0016-76492011-150 |
op_relation |
Journal of the Geological Society, 2012; 169(4):421-426 0016-7649 2041-479X http://hdl.handle.net/2440/72704 doi:10.1144/0016-76492011-150 Holford, S. [0000-0002-4524-8822] |
op_rights |
© The Geological Society of London |
op_doi |
https://doi.org/10.1144/0016-76492011-150 |
container_title |
Journal of the Geological Society |
container_volume |
169 |
container_issue |
4 |
container_start_page |
421 |
op_container_end_page |
426 |
_version_ |
1786196942387150848 |