Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin.
We use three-dimensional seismic data to describe the architecture of shallow intrusive igneous sill and dike complexes intruded into the upper crust as well as the internal and external geometry of extrusive conical igneous mounds that were fed by the magma conduits. The conical mounds accreted on...
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:2148 2023-05-15T17:41:14+02:00 Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. Davies, R. J. Bell, B. Cartwright, J. A. Shoulders, S. 2002-03 http://dro.dur.ac.uk/2148/ https://doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 unknown Geological Society of America dro:2148 issn:0091-7613 issn: 1943-2682 doi:10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 http://dro.dur.ac.uk/2148/ http://dx.doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 Geological Society of America, P.O. Box 9140, Boulder, CO 80301-9140 USA (http://www.geosociety.org) Geology, 2002, Vol.30(3), pp.223-226 [Peer Reviewed Journal] Igneous Mounds Submarine Dike Three-dimensional Seismic Volcano Article PeerReviewed 2002 ftunivdurham https://doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 2020-05-28T22:25:43Z We use three-dimensional seismic data to describe the architecture of shallow intrusive igneous sill and dike complexes intruded into the upper crust as well as the internal and external geometry of extrusive conical igneous mounds that were fed by the magma conduits. The conical mounds accreted on the seabed, directly above the tips of the basaltic dikes, between 54.9 and 54.6 Ma. In plan view the mounds are broadly circular, 1–1.7 km in diameter, and have a relief of 50–300 m. They occur above a complex network of linked cuspate-shaped sills and dikes intruded into Paleocene and Cretaceous sediments of the Faeroe-Shetland Basin, northeast Atlantic margin. The highly organized internal structure, consisting of bulbous layers arranged concentrically around a central axis, along with the clear vertical link to the underlying sills and dikes, indicates that they most likely represent pillowed basaltic lava and hyaloclastite mounds that were fed by the dikes and extruded onto the seafloor. Mounds of similar external geometry have been described from sidescan sonar images above active spreading centers in oceanic settings. However, such structures are rarely recognized in passive margin settings, and prior to this investigation our knowledge of their three-dimensional internal geometry has been largely speculative. Article in Journal/Newspaper Northeast Atlantic Durham University: Durham Research Online |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
topic |
Igneous Mounds Submarine Dike Three-dimensional Seismic Volcano |
spellingShingle |
Igneous Mounds Submarine Dike Three-dimensional Seismic Volcano Davies, R. J. Bell, B. Cartwright, J. A. Shoulders, S. Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. |
topic_facet |
Igneous Mounds Submarine Dike Three-dimensional Seismic Volcano |
description |
We use three-dimensional seismic data to describe the architecture of shallow intrusive igneous sill and dike complexes intruded into the upper crust as well as the internal and external geometry of extrusive conical igneous mounds that were fed by the magma conduits. The conical mounds accreted on the seabed, directly above the tips of the basaltic dikes, between 54.9 and 54.6 Ma. In plan view the mounds are broadly circular, 1–1.7 km in diameter, and have a relief of 50–300 m. They occur above a complex network of linked cuspate-shaped sills and dikes intruded into Paleocene and Cretaceous sediments of the Faeroe-Shetland Basin, northeast Atlantic margin. The highly organized internal structure, consisting of bulbous layers arranged concentrically around a central axis, along with the clear vertical link to the underlying sills and dikes, indicates that they most likely represent pillowed basaltic lava and hyaloclastite mounds that were fed by the dikes and extruded onto the seafloor. Mounds of similar external geometry have been described from sidescan sonar images above active spreading centers in oceanic settings. However, such structures are rarely recognized in passive margin settings, and prior to this investigation our knowledge of their three-dimensional internal geometry has been largely speculative. |
format |
Article in Journal/Newspaper |
author |
Davies, R. J. Bell, B. Cartwright, J. A. Shoulders, S. |
author_facet |
Davies, R. J. Bell, B. Cartwright, J. A. Shoulders, S. |
author_sort |
Davies, R. J. |
title |
Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. |
title_short |
Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. |
title_full |
Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. |
title_fullStr |
Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. |
title_full_unstemmed |
Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. |
title_sort |
three-dimensional seismic imaging of paleogene dike-fed submarine volcanoes from the northeast atlantic margin. |
publisher |
Geological Society of America |
publishDate |
2002 |
url |
http://dro.dur.ac.uk/2148/ https://doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Geology, 2002, Vol.30(3), pp.223-226 [Peer Reviewed Journal] |
op_relation |
dro:2148 issn:0091-7613 issn: 1943-2682 doi:10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 http://dro.dur.ac.uk/2148/ http://dx.doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 |
op_rights |
Geological Society of America, P.O. Box 9140, Boulder, CO 80301-9140 USA (http://www.geosociety.org) |
op_doi |
https://doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 |
_version_ |
1766142683824259072 |