Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism
Highlights: • Marie Byrd Seamounts (MBS) formed off Antarctica at 65-56 Ma in an extensional regime • MBS originate from HIMU-type mantle attached at the base of the Antarctic lithosphere • Continental insulation flow transferred HIMU mantle into the oceanic mantle New radiometric age and geochemica...
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ftoceanrep:oai:oceanrep.geomar.de:21843 2023-05-15T13:23:52+02:00 Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism Kipf, Andrea Hauff, Folkmar Werner, Reinhard Gohl, K. van den Bogaard, Paul Hoernle, Kaj A. Maicher, Doris Klügel, A. 2014-05 text https://oceanrep.geomar.de/id/eprint/21843/ https://oceanrep.geomar.de/id/eprint/21843/1/Kipf%20et%20al_GR_Accepted.pdf https://oceanrep.geomar.de/id/eprint/21843/14/Kipf.pdf https://doi.org/10.1016/j.gr.2013.06.013 en eng Elsevier https://oceanrep.geomar.de/id/eprint/21843/1/Kipf%20et%20al_GR_Accepted.pdf https://oceanrep.geomar.de/id/eprint/21843/14/Kipf.pdf Kipf, A., Hauff, F. , Werner, R., Gohl, K., van den Bogaard, P., Hoernle, K. A. , Maicher, D. and Klügel, A. (2014) Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism. Open Access Gondwana Research, 25 . pp. 1660-1679. DOI 10.1016/j.gr.2013.06.013 <https://doi.org/10.1016/j.gr.2013.06.013>. doi:10.1016/j.gr.2013.06.013 info:eu-repo/semantics/openAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1016/j.gr.2013.06.013 2023-04-07T15:10:01Z Highlights: • Marie Byrd Seamounts (MBS) formed off Antarctica at 65-56 Ma in an extensional regime • MBS originate from HIMU-type mantle attached at the base of the Antarctic lithosphere • Continental insulation flow transferred HIMU mantle into the oceanic mantle New radiometric age and geochemical data of volcanic rocks from the guyot-type Marie Byrd Seamounts (MBS) and the De Gerlache Seamounts and Peter I Island (Amundsen Sea) are presented. 40Ar/39Ar ages of the shield phase of three MBS are Early Cenozoic (65 to 56 Ma) and indicate formation well after creation of the Pacific-Antarctic Ridge. A Pliocene age (3.0 Ma) documents a younger phase of volcanism at one MBS and a Pleistocene age (1.8 Ma) for the submarine base of Peter I Island. Together with published data, the new age data imply that Cenozoic intraplate magmatism occurred at distinct time intervals in spatially confined areas of the Amundsen Sea, excluding an origin through a fixed mantle plume. Peter I Island appears strongly influenced by an EMII type mantle component that may reflect shallow mantle recycling of a continental raft during the final breakup of Gondwana. By contrast the Sr-Nd-Pb-Hf isotopic compositions of the MBS display a strong affinity to a HIMU type mantle source. On a regional scale the isotopic signatures overlap with those from volcanics related to the West Antarctic Rift System, and Cretaceous intraplate volcanics in and off New Zealand. We propose reactivation of the HIMU material, initially accreted to the base of continental lithosphere during the pre-rifting stage of Marie Byrd Land/Zealandia to explain intraplate volcanism in the Amundsen Sea in the absence of a long-lived hotspot. We propose continental insulation flow as the most plausible mechanism to transfer the sub-continental accreted plume material into the shallow oceanic mantle. Crustal extension at the southern boundary of the Bellingshausen Plate from about 74 to 62 Ma may have triggered adiabatic rise of the HIMU material from the base of Marie Byrd ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Marie Byrd Land Peter I Island OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Amundsen Sea Antarctic Byrd De Gerlache ENVELOPE(-62.333,-62.333,-64.500,-64.500) De Gerlache Seamounts ENVELOPE(-90.500,-90.500,-65.000,-65.000) Gerlache ENVELOPE(99.033,99.033,-66.500,-66.500) Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) New Zealand Pacific Peter I Island ENVELOPE(-90.583,-90.583,-68.783,-68.783) The Antarctic Gondwana Research 25 4 1660 1679 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights: • Marie Byrd Seamounts (MBS) formed off Antarctica at 65-56 Ma in an extensional regime • MBS originate from HIMU-type mantle attached at the base of the Antarctic lithosphere • Continental insulation flow transferred HIMU mantle into the oceanic mantle New radiometric age and geochemical data of volcanic rocks from the guyot-type Marie Byrd Seamounts (MBS) and the De Gerlache Seamounts and Peter I Island (Amundsen Sea) are presented. 40Ar/39Ar ages of the shield phase of three MBS are Early Cenozoic (65 to 56 Ma) and indicate formation well after creation of the Pacific-Antarctic Ridge. A Pliocene age (3.0 Ma) documents a younger phase of volcanism at one MBS and a Pleistocene age (1.8 Ma) for the submarine base of Peter I Island. Together with published data, the new age data imply that Cenozoic intraplate magmatism occurred at distinct time intervals in spatially confined areas of the Amundsen Sea, excluding an origin through a fixed mantle plume. Peter I Island appears strongly influenced by an EMII type mantle component that may reflect shallow mantle recycling of a continental raft during the final breakup of Gondwana. By contrast the Sr-Nd-Pb-Hf isotopic compositions of the MBS display a strong affinity to a HIMU type mantle source. On a regional scale the isotopic signatures overlap with those from volcanics related to the West Antarctic Rift System, and Cretaceous intraplate volcanics in and off New Zealand. We propose reactivation of the HIMU material, initially accreted to the base of continental lithosphere during the pre-rifting stage of Marie Byrd Land/Zealandia to explain intraplate volcanism in the Amundsen Sea in the absence of a long-lived hotspot. We propose continental insulation flow as the most plausible mechanism to transfer the sub-continental accreted plume material into the shallow oceanic mantle. Crustal extension at the southern boundary of the Bellingshausen Plate from about 74 to 62 Ma may have triggered adiabatic rise of the HIMU material from the base of Marie Byrd ... |
format |
Article in Journal/Newspaper |
author |
Kipf, Andrea Hauff, Folkmar Werner, Reinhard Gohl, K. van den Bogaard, Paul Hoernle, Kaj A. Maicher, Doris Klügel, A. |
spellingShingle |
Kipf, Andrea Hauff, Folkmar Werner, Reinhard Gohl, K. van den Bogaard, Paul Hoernle, Kaj A. Maicher, Doris Klügel, A. Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism |
author_facet |
Kipf, Andrea Hauff, Folkmar Werner, Reinhard Gohl, K. van den Bogaard, Paul Hoernle, Kaj A. Maicher, Doris Klügel, A. |
author_sort |
Kipf, Andrea |
title |
Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism |
title_short |
Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism |
title_full |
Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism |
title_fullStr |
Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism |
title_full_unstemmed |
Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism |
title_sort |
seamounts off the west antarctic margin: a case for non-hotspot driven intraplate volcanism |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/21843/ https://oceanrep.geomar.de/id/eprint/21843/1/Kipf%20et%20al_GR_Accepted.pdf https://oceanrep.geomar.de/id/eprint/21843/14/Kipf.pdf https://doi.org/10.1016/j.gr.2013.06.013 |
long_lat |
ENVELOPE(-62.333,-62.333,-64.500,-64.500) ENVELOPE(-90.500,-90.500,-65.000,-65.000) ENVELOPE(99.033,99.033,-66.500,-66.500) ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-90.583,-90.583,-68.783,-68.783) |
geographic |
Amundsen Sea Antarctic Byrd De Gerlache De Gerlache Seamounts Gerlache Marie Byrd Land New Zealand Pacific Peter I Island The Antarctic |
geographic_facet |
Amundsen Sea Antarctic Byrd De Gerlache De Gerlache Seamounts Gerlache Marie Byrd Land New Zealand Pacific Peter I Island The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Marie Byrd Land Peter I Island |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Marie Byrd Land Peter I Island |
op_relation |
https://oceanrep.geomar.de/id/eprint/21843/1/Kipf%20et%20al_GR_Accepted.pdf https://oceanrep.geomar.de/id/eprint/21843/14/Kipf.pdf Kipf, A., Hauff, F. , Werner, R., Gohl, K., van den Bogaard, P., Hoernle, K. A. , Maicher, D. and Klügel, A. (2014) Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism. Open Access Gondwana Research, 25 . pp. 1660-1679. DOI 10.1016/j.gr.2013.06.013 <https://doi.org/10.1016/j.gr.2013.06.013>. doi:10.1016/j.gr.2013.06.013 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.gr.2013.06.013 |
container_title |
Gondwana Research |
container_volume |
25 |
container_issue |
4 |
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1660 |
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1679 |
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