Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions
Abstract The nature and origin of the J‐magnetic anomaly along the Iberia–Newfoundland margins are controversial and its validity for plate kinematic reconstructions questioned. At present, it is interpreted as either an oceanic isochron or an edge effect of oceanic crust corresponding to lithospher...
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crwiley:10.1111/ter.12240 2024-06-09T07:47:50+00:00 Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions Nirrengarten, Michael Manatschal, Gianreto Tugend, Julie Kusznir, Nick J. Sauter, Daniel MM4 Consortium 2016 http://dx.doi.org/10.1111/ter.12240 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fter.12240 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12240 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 29, issue 1, page 20-28 ISSN 0954-4879 1365-3121 journal-article 2016 crwiley https://doi.org/10.1111/ter.12240 2024-05-16T14:27:51Z Abstract The nature and origin of the J‐magnetic anomaly along the Iberia–Newfoundland margins are controversial and its validity for plate kinematic reconstructions questioned. At present, it is interpreted as either an oceanic isochron or an edge effect of oceanic crust corresponding to lithosphere breakup. Both interpretations result in restorations that are in conflict with the current knowledge from Pyrenean and North Atlantic geology. We combine seismic interpretations and dating of magmatic additions with magnetic data to examine the nature and formation process of this anomaly and discuss its value for plate restorations. We show that the J‐anomaly is the result of polygenic and multiple magmatic events occurring during and after the formation of the first oceanic crust. Therefore, we conclude that the J‐anomaly cannot be used for plate kinematic studies and, more generally, we question the validity of using ill‐defined magnetic anomalies outside unequivocal oceanic domains for plate reconstructions. Article in Journal/Newspaper Newfoundland North Atlantic Wiley Online Library Terra Nova 29 1 20 28 |
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Wiley Online Library |
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English |
description |
Abstract The nature and origin of the J‐magnetic anomaly along the Iberia–Newfoundland margins are controversial and its validity for plate kinematic reconstructions questioned. At present, it is interpreted as either an oceanic isochron or an edge effect of oceanic crust corresponding to lithosphere breakup. Both interpretations result in restorations that are in conflict with the current knowledge from Pyrenean and North Atlantic geology. We combine seismic interpretations and dating of magmatic additions with magnetic data to examine the nature and formation process of this anomaly and discuss its value for plate restorations. We show that the J‐anomaly is the result of polygenic and multiple magmatic events occurring during and after the formation of the first oceanic crust. Therefore, we conclude that the J‐anomaly cannot be used for plate kinematic studies and, more generally, we question the validity of using ill‐defined magnetic anomalies outside unequivocal oceanic domains for plate reconstructions. |
author2 |
MM4 Consortium |
format |
Article in Journal/Newspaper |
author |
Nirrengarten, Michael Manatschal, Gianreto Tugend, Julie Kusznir, Nick J. Sauter, Daniel |
spellingShingle |
Nirrengarten, Michael Manatschal, Gianreto Tugend, Julie Kusznir, Nick J. Sauter, Daniel Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions |
author_facet |
Nirrengarten, Michael Manatschal, Gianreto Tugend, Julie Kusznir, Nick J. Sauter, Daniel |
author_sort |
Nirrengarten, Michael |
title |
Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions |
title_short |
Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions |
title_full |
Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions |
title_fullStr |
Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions |
title_full_unstemmed |
Nature and origin of the J‐magnetic anomaly offshore Iberia–Newfoundland: implications for plate reconstructions |
title_sort |
nature and origin of the j‐magnetic anomaly offshore iberia–newfoundland: implications for plate reconstructions |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/ter.12240 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fter.12240 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12240 |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_source |
Terra Nova volume 29, issue 1, page 20-28 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ter.12240 |
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Terra Nova |
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29 |
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1 |
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20 |
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28 |
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1801379271944437760 |