Glacial isostatic stress shadowing by the Antarctic ice sheet
Numerous examples of fault slip that offset late Quaternary glacial deposits and bedrock polish support the idea that the glacial loading cycle causes earthquakes in the upper crust. A semianalytical scheme is presented for quantifying glacial and postglacial lithospheric fault reactivation using co...
Published in: | Journal of Geophysical Research |
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Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_229974 |
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_229974 2023-05-15T13:52:13+02:00 Glacial isostatic stress shadowing by the Antarctic ice sheet Ivins, E. James, T. Klemann, V. 1.2 Global Geomonitoring and Gravity Field, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum 1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum Gravity Field and Gravimetry -2009, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum 2003 https://gfzpublic.gfz-potsdam.de/pubman/item/item_229974 unknown info:eu-repo/semantics/altIdentifier/doi/10.1029/2002JB002182 https://gfzpublic.gfz-potsdam.de/pubman/item/item_229974 Journal of Geophysical Research 550 - Earth sciences info:eu-repo/semantics/article 2003 ftgfzpotsdam https://doi.org/10.1029/2002JB002182 2022-09-14T05:56:05Z Numerous examples of fault slip that offset late Quaternary glacial deposits and bedrock polish support the idea that the glacial loading cycle causes earthquakes in the upper crust. A semianalytical scheme is presented for quantifying glacial and postglacial lithospheric fault reactivation using contemporary rock fracture prediction methods. It extends previous studies by considering differential Mogi-von Mises stresses, in addition to those resulting from a Coulomb analysis. The approach utilizes gravitational viscoelastodynamic theory and explores the relationships between ice mass history and regional seismicity and faulting in a segment of East Antarctica containing the great Antarctic Plate (Balleny Island) earthquake of 25 March 1998 (Mw 8.1). Predictions of the failure stress fields within the seismogenic crust are generated for differing assumptions about background stress orientation, mantle viscosity, lithospheric thickness, and possible late Holocene deglaciation for the D91 Antarctic ice sheet history. Similar stress fracture fields are predicted by Mogi-von Mises and Coulomb theory, thus validating previous rebound Coulomb analysis. A thick lithosphere, of the order of 150–240 km, augments stress shadowing by a late melting (middle-late Holocene) coastal East Antarctic ice complex and could cause present-day earthquakes many hundreds of kilometers seaward of the former Last Glacial Maximum grounding line. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic The Antarctic East Antarctica Journal of Geophysical Research 108 B12 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
topic |
550 - Earth sciences |
spellingShingle |
550 - Earth sciences Ivins, E. James, T. Klemann, V. Glacial isostatic stress shadowing by the Antarctic ice sheet |
topic_facet |
550 - Earth sciences |
description |
Numerous examples of fault slip that offset late Quaternary glacial deposits and bedrock polish support the idea that the glacial loading cycle causes earthquakes in the upper crust. A semianalytical scheme is presented for quantifying glacial and postglacial lithospheric fault reactivation using contemporary rock fracture prediction methods. It extends previous studies by considering differential Mogi-von Mises stresses, in addition to those resulting from a Coulomb analysis. The approach utilizes gravitational viscoelastodynamic theory and explores the relationships between ice mass history and regional seismicity and faulting in a segment of East Antarctica containing the great Antarctic Plate (Balleny Island) earthquake of 25 March 1998 (Mw 8.1). Predictions of the failure stress fields within the seismogenic crust are generated for differing assumptions about background stress orientation, mantle viscosity, lithospheric thickness, and possible late Holocene deglaciation for the D91 Antarctic ice sheet history. Similar stress fracture fields are predicted by Mogi-von Mises and Coulomb theory, thus validating previous rebound Coulomb analysis. A thick lithosphere, of the order of 150–240 km, augments stress shadowing by a late melting (middle-late Holocene) coastal East Antarctic ice complex and could cause present-day earthquakes many hundreds of kilometers seaward of the former Last Glacial Maximum grounding line. |
author2 |
1.2 Global Geomonitoring and Gravity Field, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum 1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum Gravity Field and Gravimetry -2009, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum |
format |
Article in Journal/Newspaper |
author |
Ivins, E. James, T. Klemann, V. |
author_facet |
Ivins, E. James, T. Klemann, V. |
author_sort |
Ivins, E. |
title |
Glacial isostatic stress shadowing by the Antarctic ice sheet |
title_short |
Glacial isostatic stress shadowing by the Antarctic ice sheet |
title_full |
Glacial isostatic stress shadowing by the Antarctic ice sheet |
title_fullStr |
Glacial isostatic stress shadowing by the Antarctic ice sheet |
title_full_unstemmed |
Glacial isostatic stress shadowing by the Antarctic ice sheet |
title_sort |
glacial isostatic stress shadowing by the antarctic ice sheet |
publishDate |
2003 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_229974 |
geographic |
Antarctic The Antarctic East Antarctica |
geographic_facet |
Antarctic The Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
Journal of Geophysical Research |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2002JB002182 https://gfzpublic.gfz-potsdam.de/pubman/item/item_229974 |
op_doi |
https://doi.org/10.1029/2002JB002182 |
container_title |
Journal of Geophysical Research |
container_volume |
108 |
container_issue |
B12 |
_version_ |
1766256485017321472 |