NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Anatexis and metamorphism in tectonically thickened continental crust exemplified by the Sevier hinterland, western North AmericaThis paper presents a thermal and petrologic model of anatexis and metamorphism in regions of crustal thickening exemplified by the Sevier hinterland in western North America, and uses the model to examine the geological and physical processes leading to crustally derived magmatism. The results of numerical experiments show that anatexis was an inevitable end-product of Barrovian metamorphism in the thickened crust of the late Mesozoic Sevier orogenic belt and that the advection of heat across the lithosphere, in the form of mantle-derived mafic magmas, was not required for melting of metasedimentary rocks. It is suggested that, in the Sevier belt, as in other intracontinental orogenic belts, anatexis occurred in the midcrust and not at the base of the crust.
Document ID
19910039651
Document Type
Reprint (Version printed in journal)
Authors
Patino Douce, Alberto E. (Oregon Univ. Eugene, OR, United States)
Humphreys, Eugene D. (Oregon Univ. Eugene, OR, United States)
Johnston, A. Dana (Oregon, University Eugene, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1990
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 97
Issue: 4-Mar
ISSN: 0012-821X
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAG5-755
CONTRACT_GRANT: NSF EAR-87-20150
Distribution Limits
Public
Copyright
Other