Updip limit of the seismogenic zone beneath the accretionary prism of southwest Japan: An effect of diagenetic to low-grade metamorphic processes and increasing effective stress

Research Article| February 01, 2001 Updip limit of the seismogenic zone beneath the accretionary prism of southwest Japan: An effect of diagenetic to low-grade metamorphic processes and increasing effective stress J. Casey Moore; J. Casey Moore 1Department of Earth Sciences, University of California, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Demian Saffer Demian Saffer 1Department of Earth Sciences, University of California, Santa Cruz, California 95064, USA Search for other works by this author on: GSW Google Scholar Author and Article Information J. Casey Moore 1Department of Earth Sciences, University of California, Santa Cruz, California 95064, USA Demian Saffer 1Department of Earth Sciences, University of California, Santa Cruz, California 95064, USA Publisher: Geological Society of America Received: 05 Jul 2000 Revision Received: 03 Nov 2000 Accepted: 07 Nov 2000 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (2): 183–186. https://doi.org/10.1130/0091-7613(2001)029<0183:ULOTSZ>2.0.CO;2 Article history Received: 05 Jul 2000 Revision Received: 03 Nov 2000 Accepted: 07 Nov 2000 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation J. Casey Moore, Demian Saffer; Updip limit of the seismogenic zone beneath the accretionary prism of southwest Japan: An effect of diagenetic to low-grade metamorphic processes and increasing effective stress. Geology 2001;; 29 (2): 183–186. doi: https://doi.org/10.1130/0091-7613(2001)029<0183:ULOTSZ>2.0.CO;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 Off southwest Japan the seaward limit of coseismic displacement (or updip limit of the seismogenic zone) of the 1946 Mw 8.3 thrust earthquake reaches to 4 km depth and ∼40 km landward of the trench. This limit coincides with the estimated location of the 150 °C isotherm, and has been linked to changes in physical properties associated with the smectite to illite clay-mineral transition. Here we show that this limit correlates with a suite of diagenetic to low-grade metamorphic processes characterized by (1) declining fluid production and decreasing fluid pressure ratio (λ*) and (2) active clay, carbonate, and zeolite cementation and the transition to pressure solution and quartz cementation. These diagenetic to low-grade metamorphic changes cause the onset of velocity weakening during thrust faulting, an increase in effective stress, and strengthening of the hanging wall, which together combine to produce recordable earthquakes. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.