High-resolution subducting-slab structure beneath northern Honshu, Japan, revealed by double-difference tomography

Abstract

Research Article| April 01, 2004 High-resolution subducting-slab structure beneath northern Honshu, Japan, revealed by double-difference tomography Haijiang Zhang; Haijiang Zhang 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar Clifford H. Thurber; Clifford H. Thurber 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706, USA Search for other works by this author on: GSW Google Scholar David Shelly; David Shelly 2Department of Geophysics, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Satoshi Ide; Satoshi Ide 3Department of Earth and Planetary Science, University of Tokyo, Tokyo 113-0033, Japan Search for other works by this author on: GSW Google Scholar Gregory C. Beroza; Gregory C. Beroza 4Department of Geophysics, Stanford University, Stanford, California 94305, USA Search for other works by this author on: GSW Google Scholar Akira Hasegawa Akira Hasegawa 5Research Center for Prediction of Earthquakes and Volcanic Eruption, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Haijiang Zhang 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706, USA Clifford H. Thurber 1Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706, USA David Shelly 2Department of Geophysics, Stanford University, Stanford, California 94305, USA Satoshi Ide 3Department of Earth and Planetary Science, University of Tokyo, Tokyo 113-0033, Japan Gregory C. Beroza 4Department of Geophysics, Stanford University, Stanford, California 94305, USA Akira Hasegawa 5Research Center for Prediction of Earthquakes and Volcanic Eruption, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan Publisher: Geological Society of America Received: 13 Oct 2003 Revision Received: 18 Dec 2003 Accepted: 19 Dec 2003 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (4): 361–364. https://doi.org/10.1130/G20261.2 Article history Received: 13 Oct 2003 Revision Received: 18 Dec 2003 Accepted: 19 Dec 2003 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Haijiang Zhang, Clifford H. Thurber, David Shelly, Satoshi Ide, Gregory C. Beroza, Akira Hasegawa; High-resolution subducting-slab structure beneath northern Honshu, Japan, revealed by double-difference tomography. Geology 2004;; 32 (4): 361–364. doi: https://doi.org/10.1130/G20261.2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The high-resolution seismic velocity structure of the subducting slab beneath northern Honshu, Japan, has been obtained by double-difference tomography, capitalizing on the existence of two planes of seismicity. The upper plane lies in the region with average to high Vp/Vs ratios (1.72–1.85), which may correspond to the transformations of metabasalt and metagabbro to blueschist. The lower plane is associated with very low Vp/Vs ratios (1.6–1.7), in sharp contrast with high Vp/Vs ratios (∼1.8–1.85) in the region between the two planes. These features may be explained by forsterite-enstatite-H2O formation from serpentine dehydration in the lower plane and partial hydration of the region between the two planes. Our results provide direct constraints for petrologic modeling of the subducting slab. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.