Relics of a complex triple junction in the Weddell Sea embayment, Antarctica
Interpretation of an airborne magnetic data compilation containing a key, new survey, together with re-tracked satellite gravity data from the WeddellSeaembayment (WSE), West Antarctica, suggests Rift–Rift–Rift triplejunction formation at the onset of Gondwana breakup in the Early Middle Jurassic. A...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/20537/ https://doi.org/10.1016/S0012-821X(00)00076-5 |
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ftnerc:oai:nora.nerc.ac.uk:20537 2023-05-15T13:45:12+02:00 Relics of a complex triple junction in the Weddell Sea embayment, Antarctica Ferris, J.K Vaughan, A.P.M. Storey, B.C 2000 http://nora.nerc.ac.uk/id/eprint/20537/ https://doi.org/10.1016/S0012-821X(00)00076-5 unknown Elsevier Ferris, J.K; Vaughan, A.P.M.; Storey, B.C. 2000 Relics of a complex triple junction in the Weddell Sea embayment, Antarctica. Earth and Planetary Science Letters, 178 (3-4). 215-230. https://doi.org/10.1016/S0012-821X(00)00076-5 <https://doi.org/10.1016/S0012-821X(00)00076-5> Publication - Article PeerReviewed 2000 ftnerc https://doi.org/10.1016/S0012-821X(00)00076-5 2023-02-04T19:32:55Z Interpretation of an airborne magnetic data compilation containing a key, new survey, together with re-tracked satellite gravity data from the WeddellSeaembayment (WSE), West Antarctica, suggests Rift–Rift–Rift triplejunction formation at the onset of Gondwana breakup in the Early Middle Jurassic. Acomplex system of northwest–southeast rifts was active contemporaneously with an east–west trending rift. This rift activity led to northward separation of the Falkland Plateau, and formation of the WeddellSea by sea floor spreading. Atypically, the Jurassic passive margin of Gondwana shows evidence for coeval extension in two directions and a large volume of interpreted magmatic material. This is consistent with initial doming above a mantle plume and we suggest that this resulted in the formation of atriplejunction. Magnetic anomalies indicate a series of faults perpendicular to igneous intrusions and extrusions with outlines that range in shape from lozenges to parallel ridges. They show remarkably good spatial correlation with free air gravity anomalies, even in areas of sea ice. We base a structural elements map and timing sequence for the events in the WSE during early Gondwana breakup on anomaly cross-cutting relationships. Article in Journal/Newspaper Antarc* Antarctica Sea ice Weddell Sea West Antarctica Natural Environment Research Council: NERC Open Research Archive Weddell Sea West Antarctica Weddell Falkland Plateau ENVELOPE(-50.000,-50.000,-51.000,-51.000) Earth and Planetary Science Letters 178 3-4 215 230 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Interpretation of an airborne magnetic data compilation containing a key, new survey, together with re-tracked satellite gravity data from the WeddellSeaembayment (WSE), West Antarctica, suggests Rift–Rift–Rift triplejunction formation at the onset of Gondwana breakup in the Early Middle Jurassic. Acomplex system of northwest–southeast rifts was active contemporaneously with an east–west trending rift. This rift activity led to northward separation of the Falkland Plateau, and formation of the WeddellSea by sea floor spreading. Atypically, the Jurassic passive margin of Gondwana shows evidence for coeval extension in two directions and a large volume of interpreted magmatic material. This is consistent with initial doming above a mantle plume and we suggest that this resulted in the formation of atriplejunction. Magnetic anomalies indicate a series of faults perpendicular to igneous intrusions and extrusions with outlines that range in shape from lozenges to parallel ridges. They show remarkably good spatial correlation with free air gravity anomalies, even in areas of sea ice. We base a structural elements map and timing sequence for the events in the WSE during early Gondwana breakup on anomaly cross-cutting relationships. |
format |
Article in Journal/Newspaper |
author |
Ferris, J.K Vaughan, A.P.M. Storey, B.C |
spellingShingle |
Ferris, J.K Vaughan, A.P.M. Storey, B.C Relics of a complex triple junction in the Weddell Sea embayment, Antarctica |
author_facet |
Ferris, J.K Vaughan, A.P.M. Storey, B.C |
author_sort |
Ferris, J.K |
title |
Relics of a complex triple junction in the Weddell Sea embayment, Antarctica |
title_short |
Relics of a complex triple junction in the Weddell Sea embayment, Antarctica |
title_full |
Relics of a complex triple junction in the Weddell Sea embayment, Antarctica |
title_fullStr |
Relics of a complex triple junction in the Weddell Sea embayment, Antarctica |
title_full_unstemmed |
Relics of a complex triple junction in the Weddell Sea embayment, Antarctica |
title_sort |
relics of a complex triple junction in the weddell sea embayment, antarctica |
publisher |
Elsevier |
publishDate |
2000 |
url |
http://nora.nerc.ac.uk/id/eprint/20537/ https://doi.org/10.1016/S0012-821X(00)00076-5 |
long_lat |
ENVELOPE(-50.000,-50.000,-51.000,-51.000) |
geographic |
Weddell Sea West Antarctica Weddell Falkland Plateau |
geographic_facet |
Weddell Sea West Antarctica Weddell Falkland Plateau |
genre |
Antarc* Antarctica Sea ice Weddell Sea West Antarctica |
genre_facet |
Antarc* Antarctica Sea ice Weddell Sea West Antarctica |
op_relation |
Ferris, J.K; Vaughan, A.P.M.; Storey, B.C. 2000 Relics of a complex triple junction in the Weddell Sea embayment, Antarctica. Earth and Planetary Science Letters, 178 (3-4). 215-230. https://doi.org/10.1016/S0012-821X(00)00076-5 <https://doi.org/10.1016/S0012-821X(00)00076-5> |
op_doi |
https://doi.org/10.1016/S0012-821X(00)00076-5 |
container_title |
Earth and Planetary Science Letters |
container_volume |
178 |
container_issue |
3-4 |
container_start_page |
215 |
op_container_end_page |
230 |
_version_ |
1766217154613477376 |