Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc
Middle Eocene boninites were simultaneously generated over a large region during the early history of the Izu^ Bonin^Mariana (IBM) arc. However, widespread boninite magmatism is not recognised in younger subduction zones of similar dimensions. This suggests that an additional tectonic or thermal fac...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.510.9310 2023-05-15T17:33:38+02:00 Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc Colin G. Macpherson A B Robert Hall B The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.9310 http://searg.rhul.ac.uk/publications/papers/pdf_publications/Macpherson_Hall_2001.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.9310 http://searg.rhul.ac.uk/publications/papers/pdf_publications/Macpherson_Hall_2001.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://searg.rhul.ac.uk/publications/papers/pdf_publications/Macpherson_Hall_2001.pdf boninite Izu^Bonin^Mariana Philippine Sea Plate subduction mantle plumes Manus Basin text 2000 ftciteseerx 2016-01-08T09:38:38Z Middle Eocene boninites were simultaneously generated over a large region during the early history of the Izu^ Bonin^Mariana (IBM) arc. However, widespread boninite magmatism is not recognised in younger subduction zones of similar dimensions. This suggests that an additional tectonic or thermal factor influenced the generation of the IBM boninite suite. Regional uplift, ocean island basalt-style magmatism and high heat-flow also characterised the northern Philippine Sea plate (PSP) at the start of the Middle Eocene. These features are similar to those observed in large volume basaltic volcanic provinces such as the early Tertiary North Atlantic and suggest that the IBM boninite suite may have been produced because there was already a thermal anomaly in the mantle beneath the PSP. The reconstructed Middle Eocene location of the IBM arc and West Philippine Basin lies close to the present day Manus Basin where petrological and geochemical evidence indicate the presence of a mantle plume. A calculated plume track linking these locations through time also passes close to the Eauripik Rise, an aseismic ridge on the Caroline Plate, during the Oligocene and Miocene. Therefore, we propose that a thermal anomaly or mantle plume influenced the Text North Atlantic Ocean Island Unknown |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
boninite Izu^Bonin^Mariana Philippine Sea Plate subduction mantle plumes Manus Basin |
spellingShingle |
boninite Izu^Bonin^Mariana Philippine Sea Plate subduction mantle plumes Manus Basin Colin G. Macpherson A B Robert Hall B Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc |
topic_facet |
boninite Izu^Bonin^Mariana Philippine Sea Plate subduction mantle plumes Manus Basin |
description |
Middle Eocene boninites were simultaneously generated over a large region during the early history of the Izu^ Bonin^Mariana (IBM) arc. However, widespread boninite magmatism is not recognised in younger subduction zones of similar dimensions. This suggests that an additional tectonic or thermal factor influenced the generation of the IBM boninite suite. Regional uplift, ocean island basalt-style magmatism and high heat-flow also characterised the northern Philippine Sea plate (PSP) at the start of the Middle Eocene. These features are similar to those observed in large volume basaltic volcanic provinces such as the early Tertiary North Atlantic and suggest that the IBM boninite suite may have been produced because there was already a thermal anomaly in the mantle beneath the PSP. The reconstructed Middle Eocene location of the IBM arc and West Philippine Basin lies close to the present day Manus Basin where petrological and geochemical evidence indicate the presence of a mantle plume. A calculated plume track linking these locations through time also passes close to the Eauripik Rise, an aseismic ridge on the Caroline Plate, during the Oligocene and Miocene. Therefore, we propose that a thermal anomaly or mantle plume influenced the |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Colin G. Macpherson A B Robert Hall B |
author_facet |
Colin G. Macpherson A B Robert Hall B |
author_sort |
Colin G. Macpherson A B |
title |
Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc |
title_short |
Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc |
title_full |
Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc |
title_fullStr |
Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc |
title_full_unstemmed |
Tectonic setting of Eocene boninite magmatism in the Izu^Bonin^Mariana forearc |
title_sort |
tectonic setting of eocene boninite magmatism in the izu^bonin^mariana forearc |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.9310 http://searg.rhul.ac.uk/publications/papers/pdf_publications/Macpherson_Hall_2001.pdf |
genre |
North Atlantic Ocean Island |
genre_facet |
North Atlantic Ocean Island |
op_source |
http://searg.rhul.ac.uk/publications/papers/pdf_publications/Macpherson_Hall_2001.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.9310 http://searg.rhul.ac.uk/publications/papers/pdf_publications/Macpherson_Hall_2001.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766132203939430400 |