Journal article
First report of (U-Th)/He thermochronometric data across Northeast Japan Arc: Implications for the long-term inelastic deformation Crustal Dynamics: Unified Understanding of Geodynamics Processes at Different Time and Length Scales Yoshihisa Iio, Richard H. Sibson, Toru Takeshita, Takeshi Sagiya, Bunichiro Shibazaki and Junichi Nakajima 6. Geodesy
S Sueoka, T Tagami, BP Kohn
Earth Planets and Space | SPRINGEROPEN | Published : 2017
Abstract
(U-Th)/He thermochronometric analyses were performed across the southern part of the Northeast Japan Arc for reconstructing the long-term uplift and denudation history in the region. Apatite (U-Th-Sm)/He ages ranged from 64.3 to 1.5 Ma, while zircon (U-Th)/He ages ranged between 39.6 and 11.0 Ma. Apatite (U-Th-Sm)/He ages showed obvious contrast among the morphostructural provinces; older ages of 64.3-49.6 Ma were obtained in the Abukuma Mountains on the fore-arc side, whereas younger ages of 11.4-1.5 Ma were determined in the Ou Backbone Range (OBR) along the volcanic front and the Asahi Mountains on the back-arc side. The age contrasts are basically interpreted to reflect the differences i..
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Awarded by Japan Society for the Promotion of Science
Funding Acknowledgements
This work was supported by the Grant-in-Aid for Scientific Research on Innovative Areas (KAKENHI No. 26109003) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT). Mineral separations were carried out by Drs. T. Danhara and H. Iwano of Kyoto Fission-Track Co., Ltd. The University of Melbourne thermochronology facility is supported by the National Collaborative Research Infrastructure Strategy AuScope program. We thank S. Fukuda of Kyoto University for useful comments. We also appreciate the Tohoku Regional Environment Office for permission to collect rocks in the Bandai-Asahi National Park.