eprintid: 94124
rev_number: 49
eprint_status: archive
userid: 608
dir: disk0/00/09/41/24
datestamp: 2010-10-18 23:13:26
lastmod: 2021-10-04 00:43:25
status_changed: 2012-08-28 13:54:21
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Bilek, SL
creators_name: Conrad, CP
creators_name: Lithgow-Bertelloni, C
title: Slab pull, slab weakening, and their relation to deep intra-slab seismicity
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F57
keywords: Focus earthquakes, Subduction zone, Global survey, Mantle, Lithosphere, Mechanism, Constraints, Parameters, Stresses
note: Copyright 2005 by the American Geophysical Union
abstract: Subduction zone seismicity is highly variable. Great earthquakes occur at few subduction zones around the world, with significant variation in size and frequency of deep events. Interactions between overriding and subducting plates and slab pull strength for individual plates provide a framework for understanding these variations. Previous work suggests an inverse correlation between great earthquake moment release and the degree to which the subducted slab is connected to the surface plate. We find positive correlations between degree of plate- slab attachment and moment release from intermediate and deep earthquakes. This implies that shallow slab weakening that occurs at trenches where compressive stresses ( and great earthquakes) dominate not only detaches slabs from plates, but is maintained as the slab descends, discouraging deep seismicity. Regions of low shallow moment release are consistent with extensional shallow stress regimes and undamaged slabs. Such slabs maintain mechanical strength during descent and deform seismogenically at depth.
date: 2005-07-21
publisher: AMER GEOPHYSICAL UNION
official_url: http://dx.doi.org/10.1029/2005GL022922
vfaculties: VMPS
oa_status: green
language: eng
primo: open
primo_central: open_green
article_type_text: Article
verified: verified_batch
elements_source: Web of Science
elements_id: 188350
doi: 10.1029/2005GL022922
language_elements: EN
lyricists_name: Lithgow-Bertelloni, Carolina
lyricists_id: CLITH46
full_text_status: public
publication: Geophysical Research Letters
volume: 32
number: 14
article_number: L14305
issn: 0094-8276
citation:        Bilek, SL;    Conrad, CP;    Lithgow-Bertelloni, C;      (2005)    Slab pull, slab weakening, and their relation to deep intra-slab seismicity.                   Geophysical Research Letters , 32  (14)    , Article L14305.  10.1029/2005GL022922 <https://doi.org/10.1029/2005GL022922>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/94124/1/2005GL022922.pdf