How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands
Early attempts to utilize magnetic data to understand the volcanic and subvolcanic succession on the Faroese Continental Shelf have shown that conventional interpretation and modelling of magnetic data from this area leads to ambiguous results. Interpretation of the aeromagnetic data on the Faroese...
Published in: | Geophysical Prospecting |
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Language: | English |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/525131/ https://nora.nerc.ac.uk/id/eprint/525131/1/Final%20manuscript-revised.pdf https://doi.org/10.1111/1365-2478.12834 |
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ftnerc:oai:nora.nerc.ac.uk:525131 2023-05-15T16:10:49+02:00 How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands Ziska, Heri Williamson, Paul Eidesgaard, Óluva Reginsdóttir 2019-10 text http://nora.nerc.ac.uk/id/eprint/525131/ https://nora.nerc.ac.uk/id/eprint/525131/1/Final%20manuscript-revised.pdf https://doi.org/10.1111/1365-2478.12834 en eng Wiley https://nora.nerc.ac.uk/id/eprint/525131/1/Final%20manuscript-revised.pdf Ziska, Heri; Williamson, Paul; Eidesgaard, Óluva Reginsdóttir. 2019 How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands. Geophysical Prospecting, 67 (8). 2245-2260. https://doi.org/10.1111/1365-2478.12834 <https://doi.org/10.1111/1365-2478.12834> Publication - Article PeerReviewed 2019 ftnerc https://doi.org/10.1111/1365-2478.12834 2023-02-04T19:49:15Z Early attempts to utilize magnetic data to understand the volcanic and subvolcanic succession on the Faroese Continental Shelf have shown that conventional interpretation and modelling of magnetic data from this area leads to ambiguous results. Interpretation of the aeromagnetic data on the Faroese Continental Shelf shows that some previously identified basement highs coincide with reduced‐to‐pole magnetic highs, whereas others coincide with negative or mixed magnetic features. Similarly, igneous centres are characterized by different polarity magnetic anomalies. Palaeomagnetic analysis of the onshore volcanic succession has demonstrated that the thermoremanent magnetization of the basaltic lavas is stronger than the induced magnetism, and both reversely and normally magnetized units are present. We have tested this with 2½D profile modelling using the palaeomagnetic information to correlate high‐amplitude magnetic anomalies with basalt successions containing changes in magnetic polarity. This approach has enabled us to map the termination of the differently magnetized units offshore and thereby extend the mapping of the Faroe Island Basalt Group on the Faroese Platform and into adjacent areas. Article in Journal/Newspaper Faroe Islands Natural Environment Research Council: NERC Open Research Archive Faroe Islands Geophysical Prospecting 67 8 2245 2260 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Early attempts to utilize magnetic data to understand the volcanic and subvolcanic succession on the Faroese Continental Shelf have shown that conventional interpretation and modelling of magnetic data from this area leads to ambiguous results. Interpretation of the aeromagnetic data on the Faroese Continental Shelf shows that some previously identified basement highs coincide with reduced‐to‐pole magnetic highs, whereas others coincide with negative or mixed magnetic features. Similarly, igneous centres are characterized by different polarity magnetic anomalies. Palaeomagnetic analysis of the onshore volcanic succession has demonstrated that the thermoremanent magnetization of the basaltic lavas is stronger than the induced magnetism, and both reversely and normally magnetized units are present. We have tested this with 2½D profile modelling using the palaeomagnetic information to correlate high‐amplitude magnetic anomalies with basalt successions containing changes in magnetic polarity. This approach has enabled us to map the termination of the differently magnetized units offshore and thereby extend the mapping of the Faroe Island Basalt Group on the Faroese Platform and into adjacent areas. |
format |
Article in Journal/Newspaper |
author |
Ziska, Heri Williamson, Paul Eidesgaard, Óluva Reginsdóttir |
spellingShingle |
Ziska, Heri Williamson, Paul Eidesgaard, Óluva Reginsdóttir How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands |
author_facet |
Ziska, Heri Williamson, Paul Eidesgaard, Óluva Reginsdóttir |
author_sort |
Ziska, Heri |
title |
How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands |
title_short |
How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands |
title_full |
How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands |
title_fullStr |
How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands |
title_full_unstemmed |
How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands |
title_sort |
how natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the faroe islands |
publisher |
Wiley |
publishDate |
2019 |
url |
http://nora.nerc.ac.uk/id/eprint/525131/ https://nora.nerc.ac.uk/id/eprint/525131/1/Final%20manuscript-revised.pdf https://doi.org/10.1111/1365-2478.12834 |
geographic |
Faroe Islands |
geographic_facet |
Faroe Islands |
genre |
Faroe Islands |
genre_facet |
Faroe Islands |
op_relation |
https://nora.nerc.ac.uk/id/eprint/525131/1/Final%20manuscript-revised.pdf Ziska, Heri; Williamson, Paul; Eidesgaard, Óluva Reginsdóttir. 2019 How natural remanent magnetization of basaltic units can dominate the reduced to pole magnetic value: a case study from the Faroe Islands. Geophysical Prospecting, 67 (8). 2245-2260. https://doi.org/10.1111/1365-2478.12834 <https://doi.org/10.1111/1365-2478.12834> |
op_doi |
https://doi.org/10.1111/1365-2478.12834 |
container_title |
Geophysical Prospecting |
container_volume |
67 |
container_issue |
8 |
container_start_page |
2245 |
op_container_end_page |
2260 |
_version_ |
1765995956891811840 |