Magnetotelluric evidence for thick-skinned tectonics in central Taiwan

Abstract

Research Article| August 01, 2009 Magnetotelluric evidence for thick-skinned tectonics in central Taiwan Edward Bertrand; Edward Bertrand 1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2R3, Canada Search for other works by this author on: GSW Google Scholar Martyn Unsworth; Martyn Unsworth 1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2R3, Canada Search for other works by this author on: GSW Google Scholar Chih-Wen Chiang; Chih-Wen Chiang 2Institute of Geophysics, National Central University, Chung-Li, Taiwan Search for other works by this author on: GSW Google Scholar Chow-Son Chen; Chow-Son Chen 2Institute of Geophysics, National Central University, Chung-Li, Taiwan Search for other works by this author on: GSW Google Scholar Chien-Chih Chen; Chien-Chih Chen 2Institute of Geophysics, National Central University, Chung-Li, Taiwan Search for other works by this author on: GSW Google Scholar Francis Wu; Francis Wu 3State University of New York at Binghamton, Binghamton, New York 13902-6000, USA Search for other works by this author on: GSW Google Scholar Erşan Türkoğlu; Erşan Türkoğlu 1Department of Physics, University of Alberta, Edmonton, Alberta T6G 2R3, Canada Search for other works by this author on: GSW Google Scholar Han-Lun Hsu; Han-Lun Hsu 2Institute of Geophysics, National Central University, Chung-Li, Taiwan Search for other works by this author on: GSW Google Scholar Graham Hill Graham Hill 4Institute of Geological and Nuclear Sciences, Lower Hutt 5010, New Zealand Search for other works by this author on: GSW Google Scholar Geology (2009) 37 (8): 711–714. https://doi.org/10.1130/G25755A.1 Article history received: 30 Dec 2008 rev-recd: 20 Mar 2009 accepted: 24 Mar 2009 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Edward Bertrand, Martyn Unsworth, Chih-Wen Chiang, Chow-Son Chen, Chien-Chih Chen, Francis Wu, Erşan Türkoğlu, Han-Lun Hsu, Graham Hill; Magnetotelluric evidence for thick-skinned tectonics in central Taiwan. Geology 2009;; 37 (8): 711–714. doi: https://doi.org/10.1130/G25755A.1 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 Taiwan is the type example of an arc-continent collision. Numerous tectonic models have been proposed for this orogen, and include both thin-skinned and thick-skinned lithospheric deformation. These models predict very different structures at middle and lower crustal depths, but insufficient geophysical data exist to unequivocally distinguish between them. Long-period magnetotelluric (MT) data were collected in central Taiwan in 2006–2007 to constrain the crustal resistivity structure. A two-dimensional inversion of these MT data revealed a prominent electrical conductor that extends across the décollement predicted by the thin-skinned model. This feature is interpreted to be due to 1%–2% saline fluids, and is inconsistent with the thin-skinned model. In contrast, the thick-skinned model predicts this feature since fluids are generated in the crustal root through metamorphism. Quantitative correlation of the resistivity and seismic velocity models supports small-volume, high-salinity fluids in a thickened crust as the cause of this conductor. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.