ID | 65296 |
FullText URL | |
Author |
Ohara, Honoka
Department of Earth Sciences, Okayama University
Furukawa, Kuniyuki
Faculty of Business Administration, Aichi University
Kanamaru, Tatsuo
Department of Earth and Environmental Sciences, Nihon University
|
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 degrees N, 209.6 degrees E, A(95) = 6.1 degrees, 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.
|
Keywords | Apparent polar wander path
Hairpin turn
Cretaceous
Southwest Japan
|
Published Date | 2023-04-24
|
Publication Title |
Geoscience Letters
|
Volume | volume10
|
Issue | issue1
|
Publisher | Springer
|
Start Page | 21
|
ISSN | 2196-4092
|
Content Type |
Journal Article
|
language |
English
|
OAI-PMH Set |
岡山大学
|
Copyright Holders | © The Author(s) 2023.
|
File Version | publisher
|
DOI | |
Web of Science KeyUT | |
Related Url | isVersionOf https://doi.org/10.1186/s40562-023-00275-w
|
License | http://creativecommons.org/licenses/by/4.0/
|
Citation | Uno, K., Ohara, H., Furukawa, K. et al. Absence of Cretaceous hairpin in the apparent polar wander path of southwest Japan: consistency in paleomagnetic pole positions. Geosci. Lett. 10, 21 (2023). https://doi.org/10.1186/s40562-023-00275-w
|