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Escape tectonics and the extrusion of Alaska; past, present, and future

T. F. Redfield, David W. Scholl, Paul G. Fitzgerald and Myrl E. Beck
Escape tectonics and the extrusion of Alaska; past, present, and future
Geology (Boulder) (November 2007) 35 (11): 1039-1042


The North Pacific Rim is a tectonically active plate boundary zone, parts of which may be characterized as a laterally moving orogenic stream. Crustal blocks are transported along large-magnitude strike-slip faults in western Canada and central Alaska toward the Aleutian-Bering Sea subduction zones. Throughout much of the Cenozoic, at and west of its Alaskan nexus, the North Pacific Rim orogenic Stream (NPRS) has undergone tectonic escape. During transport, relatively rigid blocks acquired paleomagnetic rotations and fault-juxtaposed boundaries while flowing differentially through the system, from their original point of accretion and entrainment toward the free face defined by the Aleutian-Bering Sea subduction zones. Built upon classical terrane tectonics, the NPRS model provides a new framework with which to view the mobilistic nature of the western North American plate boundary zone.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 35
Serial Issue: 11
Title: Escape tectonics and the extrusion of Alaska; past, present, and future
Affiliation: Geological Survey of Norway, Trondheim, Norway
Pages: 1039-1042
Published: 200711
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 46
Accession Number: 2007-128472
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sketch map
N51°00'00" - N72°00'00", W130°00'00" - E173°00'00"
N36°04'60" - N42°01'60", E26°10'00" - E44°49'60"
Secondary Affiliation: Stanford University, USA, United StatesSyracuse University, USA, United StatesWestern Washington University, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200751
Program Name: USGSOPNon-USGS publications with USGS authors
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