Mathematics – Logic
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990e%26psl..97..290p&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 97, no. 3-4, March 1990, p. 290-315.
Mathematics
Logic
43
Earth Crust, Earth Mantle, Metamorphic Rocks, Rocky Mountains (North America), Cenozoic Era, Magma, Mesozoic Era
Scientific paper
This 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.
Humphreys Eugene D.
Johnston Dana A.
Patiño Douce Alberto E.
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