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Title: Kinematic model for postorogenic Basin and Range extension

Abstract

The Raft River extensional shear zone is exposed in the Albion-Raft River-Grouse Creek metamorphic core complex. Several studies of ductile deformation have shown that it accommodated crustal stretching in Tertiary time during late orogenic collapse of the thickened Cordilleran crust. Progressive deformation that results from mixed pure and simple shear produces a complex strain pattern along the shear zone. The authors propose a numerical kinematic model that relates strain variations in the shear zone to the different amounts of extension between the brittlely extended upper plate rocks and the undeformed lower plate rocks. A possible hypothesis for postorogenic crustal extension involves diffuse heterogeneous extension and flow in the ductile lower crust and localized extensional shear zones in the middle and upper crust.

Authors:
;  [1]
  1. Universite de Montpellier II (France)
Publication Date:
OSTI Identifier:
5541737
Resource Type:
Journal Article
Journal Name:
Geology; (USA)
Additional Journal Information:
Journal Volume: 19:6; Journal ID: ISSN 0091-7613
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; GEOLOGIC FORMATIONS; GEOLOGIC MODELS; UTAH; CONTINENTAL CRUST; DEFORMATION; METAMORPHIC ROCKS; OROGENESIS; SEDIMENTARY BASINS; SHEAR; STRAINS; TECTONICS; TERTIARY PERIOD; CENOZOIC ERA; DEVELOPED COUNTRIES; EARTH CRUST; FEDERAL REGION VIII; GEOLOGIC AGES; GEOLOGIC STRUCTURES; NORTH AMERICA; ROCKS; USA; 580000* - Geosciences

Citation Formats

Malavieille, J, and Taboada, A. Kinematic model for postorogenic Basin and Range extension. United States: N. p., 1991. Web. doi:10.1130/0091-7613(1991)019<0555:KMFPBA>2.3.CO;2.
Malavieille, J, & Taboada, A. Kinematic model for postorogenic Basin and Range extension. United States. https://doi.org/10.1130/0091-7613(1991)019<0555:KMFPBA>2.3.CO;2
Malavieille, J, and Taboada, A. 1991. "Kinematic model for postorogenic Basin and Range extension". United States. https://doi.org/10.1130/0091-7613(1991)019<0555:KMFPBA>2.3.CO;2.
@article{osti_5541737,
title = {Kinematic model for postorogenic Basin and Range extension},
author = {Malavieille, J and Taboada, A},
abstractNote = {The Raft River extensional shear zone is exposed in the Albion-Raft River-Grouse Creek metamorphic core complex. Several studies of ductile deformation have shown that it accommodated crustal stretching in Tertiary time during late orogenic collapse of the thickened Cordilleran crust. Progressive deformation that results from mixed pure and simple shear produces a complex strain pattern along the shear zone. The authors propose a numerical kinematic model that relates strain variations in the shear zone to the different amounts of extension between the brittlely extended upper plate rocks and the undeformed lower plate rocks. A possible hypothesis for postorogenic crustal extension involves diffuse heterogeneous extension and flow in the ductile lower crust and localized extensional shear zones in the middle and upper crust.},
doi = {10.1130/0091-7613(1991)019<0555:KMFPBA>2.3.CO;2},
url = {https://www.osti.gov/biblio/5541737}, journal = {Geology; (USA)},
issn = {0091-7613},
number = ,
volume = 19:6,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 1991},
month = {Sat Jun 01 00:00:00 EDT 1991}
}