HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >

Three-dimensional resistivity structure in Ishikari Lowland, Hokkaido, northeastern Japan-Implications to strain concentration mechanism

Files in This Item:
GGG18-2 735–754.pdf4.81 MBPDFView/Open
Supporting Information.pdf1.91 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/67051

Title: Three-dimensional resistivity structure in Ishikari Lowland, Hokkaido, northeastern Japan-Implications to strain concentration mechanism
Authors: Yamaya, Yusuke Browse this author
Mogi, Toru Browse this author
Honda, Ryo Browse this author
Hase, Hideaki Browse this author
Hashimoto, Takeshi Browse this author →KAKEN DB
Uyeshima, Makoto Browse this author
Issue Date: 28-Feb-2017
Publisher: American Geophysical Union
Journal Title: Geochemistry, Geophysics, Geosystems
Volume: 18
Issue: 2
Start Page: 735
End Page: 754
Publisher DOI: 10.1002/2016GC006771
Abstract: The Ishikari Lowland on the island of Hokkaido in northeastern Japan is situated at the end of a westward-moving foreland fold-and-thrust belt from the Hidaka collision zone, where the northeastern Japan and Kurile arcs meet. This activity forms a tectonic zone under an east-west compression field in this region. A magnetotelluric resistivity survey was performed to investigate the mechanism for the strain concentration in this region. A three-dimensional (3-D) resistivity inversion showed a conductive thick sedimentary layer and an underlying resistive basement. Remarkable conductors were found in the resistive basement beneath the Ishikari-teichi-toen fault zone (ITFZ) and the Shikotsu caldera. The conductors beneath the ITFZ were interpreted as aqueous fluids that accumulated in the damaged zone in connection with the formation of pull-apart faults and horst. In contrast, the conductor beneath the Shikotsu caldera corresponds to a magmatic fluid path from the upper mantle. These features suggest that the ductile deformation in the upper crust contribute to the strain concentration in this region. The soft thick sediments allow ductile deformations to occur. Furthermore, local fluid-rich zones in the basement cause the crustal strength to be heterogeneous. These thick sediments and local fluids in the basement both contribute to the strain concentration in this region.
Rights: Copyright 2017 American Geophysical Union. Yamaya, Y., T. Mogi, R. Honda, H. Hase, T. Hashimoto, and M. Uyeshima (2017), Three-dimensional resistivity structure in Ishikari Lowland, Hokkaido, northeastern Japan—Implications to strain concentration mechanism, Geochem. Geophys. Geosyst., 18, 735–754, doi:10.1002/2016GC006771. To view the published open abstract, go to http://dx.doi.org and enter the DOI.
Type: article
URI: http://hdl.handle.net/2115/67051
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 橋本 武志

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 

 - Hokkaido University