Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland
The HuÌsaviÌk-Flatey Fault is a 110°-striking oceanic transform fault exposed on land in northern Iceland. South of the HuÌsaviÌk-Flatey Fault, there is a distinct curvature in the strikes of lavas and dikes on the peninsula of Flateyjarskagi: lavas far from the fault strike NW-SE, but change in clo...
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ftcarletoncoll:oai:digitalcommons.carleton.edu:comps-1813 2024-02-11T10:05:00+01:00 Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland Chapman, William Alan Longhurst 2016-01-01T08:00:00Z application/pdf https://digitalcommons.carleton.edu/comps/814 unknown Carleton Digital Commons https://digitalcommons.carleton.edu/comps/814 Integrated Comprehensive Exercises (Comps) Iceland paleomagnetism mid-ocean ridges rotation structural geology text 2016 ftcarletoncoll 2024-01-22T19:21:26Z The HuÌsaviÌk-Flatey Fault is a 110°-striking oceanic transform fault exposed on land in northern Iceland. South of the HuÌsaviÌk-Flatey Fault, there is a distinct curvature in the strikes of lavas and dikes on the peninsula of Flateyjarskagi: lavas far from the fault strike NW-SE, but change in clockwise fashion to NE-SW strikes close to the fault. Dike strikes change similarly, transitioning from NNE-SSW to E-W. I use paleomagnetic methods to determine whether the curving orientation of these structures is original or whether it reflects tectonic rotation. I present new paleomagnetic data from 8 sites (49 lava flows) on the peninsulas of Flateyjarskagi, Tjörnes, and Tröllaskagi. From these data it is clear that rocks have rotated, and rotation increases with proximity to the HuÌsaviÌk-Flatey Fault, some of the rocks may have rotated more than 170° (±17°) since the fault's initiation 8.5-8.0 Ma. This rotation may have been accommodated by a number of mechanisms, including simple shear, small block rotation, or tectonically driven processes related to a dying spreading ridge in western Iceland. The dying ridge (known as the Skagafjörður Paleo- Rift) and the Northern Volcanic Zone to the west were simultaneously active from 8.5 Ma to 3.0 Ma, possibly contributing to additional rotation on both vertical and non- vertical axes. These results are important for understanding not only the development of the HuÌsaviÌk-Flatey Fault in northern Iceland, but also deformation associated with oceanic transform faults in general. Text Iceland Flatey Carleton College: Digital Commons |
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Carleton College: Digital Commons |
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Iceland paleomagnetism mid-ocean ridges rotation structural geology |
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Iceland paleomagnetism mid-ocean ridges rotation structural geology Chapman, William Alan Longhurst Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland |
topic_facet |
Iceland paleomagnetism mid-ocean ridges rotation structural geology |
description |
The HuÌsaviÌk-Flatey Fault is a 110°-striking oceanic transform fault exposed on land in northern Iceland. South of the HuÌsaviÌk-Flatey Fault, there is a distinct curvature in the strikes of lavas and dikes on the peninsula of Flateyjarskagi: lavas far from the fault strike NW-SE, but change in clockwise fashion to NE-SW strikes close to the fault. Dike strikes change similarly, transitioning from NNE-SSW to E-W. I use paleomagnetic methods to determine whether the curving orientation of these structures is original or whether it reflects tectonic rotation. I present new paleomagnetic data from 8 sites (49 lava flows) on the peninsulas of Flateyjarskagi, Tjörnes, and Tröllaskagi. From these data it is clear that rocks have rotated, and rotation increases with proximity to the HuÌsaviÌk-Flatey Fault, some of the rocks may have rotated more than 170° (±17°) since the fault's initiation 8.5-8.0 Ma. This rotation may have been accommodated by a number of mechanisms, including simple shear, small block rotation, or tectonically driven processes related to a dying spreading ridge in western Iceland. The dying ridge (known as the Skagafjörður Paleo- Rift) and the Northern Volcanic Zone to the west were simultaneously active from 8.5 Ma to 3.0 Ma, possibly contributing to additional rotation on both vertical and non- vertical axes. These results are important for understanding not only the development of the HuÌsaviÌk-Flatey Fault in northern Iceland, but also deformation associated with oceanic transform faults in general. |
format |
Text |
author |
Chapman, William Alan Longhurst |
author_facet |
Chapman, William Alan Longhurst |
author_sort |
Chapman, William Alan Longhurst |
title |
Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland |
title_short |
Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland |
title_full |
Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland |
title_fullStr |
Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland |
title_full_unstemmed |
Paleomagnetic analysis of deformation and rotation associated with the HuÌsaviÌk-Flatey Fault, northern Iceland |
title_sort |
paleomagnetic analysis of deformation and rotation associated with the huìsaviìk-flatey fault, northern iceland |
publisher |
Carleton Digital Commons |
publishDate |
2016 |
url |
https://digitalcommons.carleton.edu/comps/814 |
genre |
Iceland Flatey |
genre_facet |
Iceland Flatey |
op_source |
Integrated Comprehensive Exercises (Comps) |
op_relation |
https://digitalcommons.carleton.edu/comps/814 |
_version_ |
1790601810523717632 |