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A geologic recipe for transient slip within the seismogenic zone: Insight from the Guerrero seismic gap, Mexico

2017; Geological Society of America; Volume: 46; Issue: 1 Linguagem: Inglês

10.1130/g39202.1

1943-2682

Allen Husker, Luca Ferrari, Claudia Arango-Galván, Fernando Corbo-Camargo, Jorge Arzate-Flores,

Earthquake Detection and Analysis

Research Article| November 16, 2017 A geologic recipe for transient slip within the seismogenic zone: Insight from the Guerrero seismic gap, Mexico Allen Husker; Allen Husker 1Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico Search for other works by this author on: GSW Google Scholar Luca Ferrari; Luca Ferrari 2Centro de Geociencias, Universidad Nacional Autónoma de México, Juriquilla 76230, Mexico Search for other works by this author on: GSW Google Scholar Claudia Arango-Galván; Claudia Arango-Galván 1Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510 Mexico City, Mexico Search for other works by this author on: GSW Google Scholar Fernando Corbo-Camargo; Fernando Corbo-Camargo 3CONACYT–Centro de Geociencias, Universidad Nacional Autónoma de México, 76230 Juriquilla, Mexico Search for other works by this author on: GSW Google Scholar Jorge Arturo Arzate-Flores Jorge Arturo Arzate-Flores 2Centro de Geociencias, Universidad Nacional Autónoma de México, Juriquilla 76230, Mexico Search for other works by this author on: GSW Google Scholar Geology (2018) 46 (1): 35–38. https://doi.org/10.1130/G39202.1 Article history received: 04 Apr 2017 rev-recd: 03 Oct 2017 accepted: 09 Oct 2017 first online: 16 Nov 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Allen Husker, Luca Ferrari, Claudia Arango-Galván, Fernando Corbo-Camargo, Jorge Arturo Arzate-Flores; A geologic recipe for transient slip within the seismogenic zone: Insight from the Guerrero seismic gap, Mexico. Geology 2017;; 46 (1): 35–38. doi: https://doi.org/10.1130/G39202.1 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 The largest-magnitude slow slip events (SSEs) in the world are found to invade the seismogenic zone in the Guerrero seismic gap in Mexico. The Guerrero SSEs repeat within the same region every 4 yr. Here we examine the geological and geophysical evidence for the mechanism that allows for transient slip in the gap and at no other point along the >1000-km-long subduction zone. We find that long-lasting past magmatic activity most likely produced an impermeable gabbroic layer in the lower crust within the gap. This body has acted as a seal to trap fluids and over-pressurize the plate interface, thereby generating a transient slip region allowing for SSEs to invade the seismogenic zone. This suggests that transient slip can occur in typically seismogenic regions, but requires special conditions. It also adds to the growing evidence that the Guerrero gap may have a lower seismic hazard compared to the rest of the coast, which is opposite to what is reported by government agencies. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.