Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions
Abstract To test the hypothesis that a Cretaceous hairpin turn is absent in the apparent polar wander path (APWP) of the inner arc of southwestern Japanese island (southwest Japan), we refined a mid-Cretaceous (100 Ma) paleomagnetic pole from southwest Japan. Red mudstone samples from the 100 Ma Hay...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-04-01
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| Series: | Geoscience Letters |
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| Online Access: | https://doi.org/10.1186/s40562-023-00275-w |
| _version_ | 1797836419269394432 |
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| author | Koji Uno Honoka Ohara Kuniyuki Furukawa Tatsuo Kanamaru |
| author_facet | Koji Uno Honoka Ohara Kuniyuki Furukawa Tatsuo Kanamaru |
| author_sort | Koji Uno |
| collection | DOAJ |
| description | Abstract To test the hypothesis that a Cretaceous hairpin turn is absent in the apparent polar wander path (APWP) of the inner arc of southwestern Japanese island (southwest Japan), we refined a mid-Cretaceous (100 Ma) paleomagnetic pole from southwest Japan. Red mudstone samples from the 100 Ma Hayama Formation were collected for paleomagnetic analysis from eight sites in the Hayama area in the central part of southwest Japan. A high-temperature remanent magnetization component carried by hematite was isolated from these sites and was found to be of primary mid-Cretaceous origin. The primary nature of the magnetization is supported by the detrital character of the magnetic carrier. The primary directions provided a paleomagnetic pole (35.0°N, 209.6°E, A95 = 6.1°, N = 8), which represented southwest Japan at 100 Ma. This pole falls into a cluster of Cretaceous poles in southwest Japan. An APWP for southwest Japan between 110 and 70 Ma was updated to ascertain the stationarity of the pole positions for this region. Therefore, it is unlikely that the APWP for southwest Japan experienced a hairpin turn during the Cretaceous. |
| first_indexed | 2024-04-09T15:09:18Z |
| format | Article |
| id | doaj.art-781d0024d163460992ec3952eec984a2 |
| institution | Directory Open Access Journal |
| issn | 2196-4092 |
| language | English |
| last_indexed | 2024-04-09T15:09:18Z |
| publishDate | 2023-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Geoscience Letters |
| spelling | doaj.art-781d0024d163460992ec3952eec984a22023-04-30T11:18:12ZengSpringerOpenGeoscience Letters2196-40922023-04-0110111210.1186/s40562-023-00275-wAbsence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positionsKoji Uno0Honoka Ohara1Kuniyuki Furukawa2Tatsuo Kanamaru3Laboratory of Geosciences, School of Human Science and Environment, University of HyogoDepartment of Earth Sciences, Okayama UniversityFaculty of Business Administration, Aichi UniversityDepartment of Earth and Environmental Sciences, Nihon UniversityAbstract To test the hypothesis that a Cretaceous hairpin turn is absent in the apparent polar wander path (APWP) of the inner arc of southwestern Japanese island (southwest Japan), we refined a mid-Cretaceous (100 Ma) paleomagnetic pole from southwest Japan. Red mudstone samples from the 100 Ma Hayama Formation were collected for paleomagnetic analysis from eight sites in the Hayama area in the central part of southwest Japan. A high-temperature remanent magnetization component carried by hematite was isolated from these sites and was found to be of primary mid-Cretaceous origin. The primary nature of the magnetization is supported by the detrital character of the magnetic carrier. The primary directions provided a paleomagnetic pole (35.0°N, 209.6°E, A95 = 6.1°, N = 8), which represented southwest Japan at 100 Ma. This pole falls into a cluster of Cretaceous poles in southwest Japan. An APWP for southwest Japan between 110 and 70 Ma was updated to ascertain the stationarity of the pole positions for this region. Therefore, it is unlikely that the APWP for southwest Japan experienced a hairpin turn during the Cretaceous.https://doi.org/10.1186/s40562-023-00275-wApparent polar wander pathHairpin turnCretaceousSouthwest Japan |
| spellingShingle | Koji Uno Honoka Ohara Kuniyuki Furukawa Tatsuo Kanamaru Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions Geoscience Letters Apparent polar wander path Hairpin turn Cretaceous Southwest Japan |
| title | Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions |
| title_full | Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions |
| title_fullStr | Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions |
| title_full_unstemmed | Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions |
| title_short | Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions |
| title_sort | absence of cretaceous hairpin in the apparent polar wander path of southwest japan consistency in paleomagnetic pole positions |
| topic | Apparent polar wander path Hairpin turn Cretaceous Southwest Japan |
| url | https://doi.org/10.1186/s40562-023-00275-w |
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