NDLI: Glacio-seismotectonics: ice sheets, crustal deformation and seismicity

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Glacio-seismotectonics: ice sheets, crustal deformation and seismicity

Content Provider	NASA Technical Reports Server (NTRS)
Author	Rose Sr., James Sauber, Jeanne Stewart, Iain S.
Copyright Year	2000
Description	The last decade has witnessed a significant growth in our understanding of the past and continuing effects of ice sheets and glaciers on contemporary crustal deformation and seismicity. This growth has been driven largely by the emergence of postglacial rebound models (PGM) constrained by new field observations that incorporate increasingly realistic rheological, mechanical, and glacial parameters. In this paper, we highlight some of these recent field-based investigations and new PGMs, and examine their implications for understanding crustal deformation and seismicity during glaciation and following deglaciation. The emerging glacial rebound models outlined in the paper support the view that both tectonic stresses and glacial rebound stresses are needed to explain the distribution and style of contemporary earthquake activity in former glaciated shields of eastern Canada and Fennoscandia. However, many of these models neglect important parameters, such as topography, lateral variations in lithospheric strength and tectonic strain built up during glaciation. In glaciated mountainous terrains, glacial erosion may directly modulate tectonic deformation by resetting the orogenic topography and thereby providing an additional compensatory uplift mechanism. Such effects are likely to be important both in tectonically active orogens and in the mountainous regions of glaciated shields.
File Size	2942725
File Format	PDF
Language	English
Publisher Date	2000-01-01
Access Restriction	Open
Subject Keyword	Geophysics Deformation Rheology Lithosphere Ice Tectonics Mountains Canada Glaciology Terrain Seismology Earthquakes Topography Orography Crustal Fractures Glaciers Erosion Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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