Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic)
Regional 2D multichannel seismic, borehole, dredge and outcrop data, together with burial models for strata in southwest Iberia, are used to investigate the tectono-stratigraphic signature of multiphased rifting on divergent margins. Our burial model for southwest Iberia reveals that Mesozoic extens...
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Language: | English |
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American Geophysical Union
2012
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/30753/ http://www.agu.org/pubs/crossref/2012/2011TC003001.shtml https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf https://doi.org/10.1029/2011TC003001 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:30753 2023-06-11T04:14:53+02:00 Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) Sousa Lemos Pereira, Ricardo Nuno Alves, Tiago Marcos 2012 application/pdf https://orca.cardiff.ac.uk/id/eprint/30753/ http://www.agu.org/pubs/crossref/2012/2011TC003001.shtml https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf https://doi.org/10.1029/2011TC003001 en eng American Geophysical Union https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf Sousa Lemos Pereira, Ricardo Nuno and Alves, Tiago Marcos https://orca.cardiff.ac.uk/view/cardiffauthors/A106896T.html orcid:0000-0002-2765-3760 orcid:0000-0002-2765-3760 2012. Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic). Tectonics 31 , TC4001. 10.1029/2011TC003001 https://doi.org/10.1029/2011TC003001 file https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf doi:10.1029/2011TC003001 QE Geology Article PeerReviewed 2012 ftunivcardiff https://doi.org/10.1029/2011TC003001 2023-05-04T22:33:25Z Regional 2D multichannel seismic, borehole, dredge and outcrop data, together with burial models for strata in southwest Iberia, are used to investigate the tectono-stratigraphic signature of multiphased rifting on divergent margins. Our burial model for southwest Iberia reveals that Mesozoic extension occurred during three main phases, each comprising distinct subsidence pulses separated by short-lived periods of crustal uplift. The importance of these phases varies across discrete sectors of the margin, each one revealing similar depositional architectures and associated tectonic systems tracts: 1)the Rift Initiation phase, characterized by incipient subsidence and overall aggradation/progradation over a basal unconformity, 2)the Rift Climax phase, which marks maxima of tectonic subsidence, is characterized by retrogradation-progradation and 3)the Late Rift phase, recording the progradational infill of the basin, often showing the effects of eustasy. The Rift Initiation systems tracts comprise Sinemurian and late Callovian-early Oxfordian strata. Marine units in the Pliensbachian and Late Oxfordian-Kimmeridgian represent the Rift Climax phases, a period marked by the development of Maximum Flooding Surfaces. Late Rift deposits were identified in the Rhaetian-Hettangian, Toarcian-Bathonian and Kimmeridgian-Berriasian. The results of this work are important to the economic exploration of deep-offshore rift basins, as they reveal that sequence stratigraphy can be used to predict sedimentary facies distribution in more distal deep-offshore basins. Significantly, this work recognizes that multiple tectonic-stratigraphic cycles can occur in deep-offshore rift basins from the onset of rift-related extension until continental break-up, a character that contrast to what is known from deep-sea drilling data from the distal margin of Northwest Iberia. Article in Journal/Newspaper North Atlantic Cardiff University: ORCA (Online Research @ Cardiff) Tectonics 31 4 n/a n/a |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
topic |
QE Geology |
spellingShingle |
QE Geology Sousa Lemos Pereira, Ricardo Nuno Alves, Tiago Marcos Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) |
topic_facet |
QE Geology |
description |
Regional 2D multichannel seismic, borehole, dredge and outcrop data, together with burial models for strata in southwest Iberia, are used to investigate the tectono-stratigraphic signature of multiphased rifting on divergent margins. Our burial model for southwest Iberia reveals that Mesozoic extension occurred during three main phases, each comprising distinct subsidence pulses separated by short-lived periods of crustal uplift. The importance of these phases varies across discrete sectors of the margin, each one revealing similar depositional architectures and associated tectonic systems tracts: 1)the Rift Initiation phase, characterized by incipient subsidence and overall aggradation/progradation over a basal unconformity, 2)the Rift Climax phase, which marks maxima of tectonic subsidence, is characterized by retrogradation-progradation and 3)the Late Rift phase, recording the progradational infill of the basin, often showing the effects of eustasy. The Rift Initiation systems tracts comprise Sinemurian and late Callovian-early Oxfordian strata. Marine units in the Pliensbachian and Late Oxfordian-Kimmeridgian represent the Rift Climax phases, a period marked by the development of Maximum Flooding Surfaces. Late Rift deposits were identified in the Rhaetian-Hettangian, Toarcian-Bathonian and Kimmeridgian-Berriasian. The results of this work are important to the economic exploration of deep-offshore rift basins, as they reveal that sequence stratigraphy can be used to predict sedimentary facies distribution in more distal deep-offshore basins. Significantly, this work recognizes that multiple tectonic-stratigraphic cycles can occur in deep-offshore rift basins from the onset of rift-related extension until continental break-up, a character that contrast to what is known from deep-sea drilling data from the distal margin of Northwest Iberia. |
format |
Article in Journal/Newspaper |
author |
Sousa Lemos Pereira, Ricardo Nuno Alves, Tiago Marcos |
author_facet |
Sousa Lemos Pereira, Ricardo Nuno Alves, Tiago Marcos |
author_sort |
Sousa Lemos Pereira, Ricardo Nuno |
title |
Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) |
title_short |
Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) |
title_full |
Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) |
title_fullStr |
Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) |
title_full_unstemmed |
Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic) |
title_sort |
tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore southwest iberia, north atlantic) |
publisher |
American Geophysical Union |
publishDate |
2012 |
url |
https://orca.cardiff.ac.uk/id/eprint/30753/ http://www.agu.org/pubs/crossref/2012/2011TC003001.shtml https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf https://doi.org/10.1029/2011TC003001 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf Sousa Lemos Pereira, Ricardo Nuno and Alves, Tiago Marcos https://orca.cardiff.ac.uk/view/cardiffauthors/A106896T.html orcid:0000-0002-2765-3760 orcid:0000-0002-2765-3760 2012. Tectono-stratigraphic signature of multiphased rifting on divergent margins (deep-offshore Southwest Iberia, North Atlantic). Tectonics 31 , TC4001. 10.1029/2011TC003001 https://doi.org/10.1029/2011TC003001 file https://orca.cardiff.ac.uk/id/eprint/30753/1/Pereira%202012.pdf doi:10.1029/2011TC003001 |
op_doi |
https://doi.org/10.1029/2011TC003001 |
container_title |
Tectonics |
container_volume |
31 |
container_issue |
4 |
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n/a |
op_container_end_page |
n/a |
_version_ |
1768371256457953280 |