K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean.
Gettysburg Bank forms the western end of the Gorringe Seamount which is situated in the North Atlantic 110 km west of the tip of the Iberian Peninsula, on the eastern end of the Azores/Gibraltar fracture zone. Gabbros dredged from the Gettysburg Bank record a complex history of events. K-Ar ages of...
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1979
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:11996 2023-05-15T17:29:06+02:00 K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. Prichard, Hazel Margaret Mitchell, J. G. 1979 https://orca.cardiff.ac.uk/id/eprint/11996/ http://www.sciencedirect.com/science/article/pii/0012821X79901742 https://doi.org/10.1016/0012-821X(79)90174-2 unknown Elsevier Prichard, Hazel Margaret and Mitchell, J. G. 1979. K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. Earth and Planetary Science Letters 44 (2) , pp. 261-268. 10.1016/0012-821X(79)90174-2 https://doi.org/10.1016/0012-821X%2879%2990174-2 doi:10.1016/0012-821X(79)90174-2 QE Geology Article PeerReviewed 1979 ftunivcardiff https://doi.org/10.1016/0012-821X(79)90174-2 2022-09-25T20:18:21Z Gettysburg Bank forms the western end of the Gorringe Seamount which is situated in the North Atlantic 110 km west of the tip of the Iberian Peninsula, on the eastern end of the Azores/Gibraltar fracture zone. Gabbros dredged from the Gettysburg Bank record a complex history of events. K-Ar ages of separated mineral phases fall into three concordant groups (plus some discordant ages). The oldest ages are from three brown kaersutitic hornblendes and their mean age of135 ± 3Ma is taken to be that of their formation. Six plagioclase feldspars yielded concordant ages of105 ± 3Ma which is possibly a consequence of a thermal event occurring at that time. Ages from three deformed plagioclases are concordant with a mean of82 ± 3Ma which is believed to relate to a phase of shearing, perhaps occurring during transform motion at the plate boundary. Article in Journal/Newspaper North Atlantic Cardiff University: ORCA (Online Research @ Cardiff) Earth and Planetary Science Letters 44 2 261 268 |
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Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Prichard, Hazel Margaret Mitchell, J. G. K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. |
topic_facet |
QE Geology |
description |
Gettysburg Bank forms the western end of the Gorringe Seamount which is situated in the North Atlantic 110 km west of the tip of the Iberian Peninsula, on the eastern end of the Azores/Gibraltar fracture zone. Gabbros dredged from the Gettysburg Bank record a complex history of events. K-Ar ages of separated mineral phases fall into three concordant groups (plus some discordant ages). The oldest ages are from three brown kaersutitic hornblendes and their mean age of135 ± 3Ma is taken to be that of their formation. Six plagioclase feldspars yielded concordant ages of105 ± 3Ma which is possibly a consequence of a thermal event occurring at that time. Ages from three deformed plagioclases are concordant with a mean of82 ± 3Ma which is believed to relate to a phase of shearing, perhaps occurring during transform motion at the plate boundary. |
format |
Article in Journal/Newspaper |
author |
Prichard, Hazel Margaret Mitchell, J. G. |
author_facet |
Prichard, Hazel Margaret Mitchell, J. G. |
author_sort |
Prichard, Hazel Margaret |
title |
K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. |
title_short |
K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. |
title_full |
K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. |
title_fullStr |
K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. |
title_full_unstemmed |
K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. |
title_sort |
k-ar data for the age and evolution of gettysburg bank, north atlantic ocean. |
publisher |
Elsevier |
publishDate |
1979 |
url |
https://orca.cardiff.ac.uk/id/eprint/11996/ http://www.sciencedirect.com/science/article/pii/0012821X79901742 https://doi.org/10.1016/0012-821X(79)90174-2 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Prichard, Hazel Margaret and Mitchell, J. G. 1979. K-Ar data for the age and evolution of Gettysburg Bank, North Atlantic Ocean. Earth and Planetary Science Letters 44 (2) , pp. 261-268. 10.1016/0012-821X(79)90174-2 https://doi.org/10.1016/0012-821X%2879%2990174-2 doi:10.1016/0012-821X(79)90174-2 |
op_doi |
https://doi.org/10.1016/0012-821X(79)90174-2 |
container_title |
Earth and Planetary Science Letters |
container_volume |
44 |
container_issue |
2 |
container_start_page |
261 |
op_container_end_page |
268 |
_version_ |
1766122698838114304 |