NDLI: A numerical model of exhumation of the orogenic lower crust in the Bohemian Massif during the Variscan orogeny

Content Provider	Springer Nature Link
Author	Maierová, Petra Čadek, Ondřej Lexa, Ondrej Schulmann, Karel
Copyright Year	2012
Abstract	We present a numerical model of the main phase (370–335 Ma) of the Variscan orogeny in the central part of the Bohemian Massif. The crustal deformation in our model is driven by radiogenic heating in the felsic lower crust, the lateral contraction of the Moldanubian domain due to convergence with the Saxothuringian plate (in the early stage of orogeny), and the indentation of the Brunovistulian basement into the weakened orogenic root (in the late stage). Our model explains the main geological events inferred from the geological record in the Moldanubian domain: formation of the orogenic plateau and onset of sedimentation at about 345 Ma, rapid exhumation of the orogenic lower crust at about 340 Ma and subsurface flow of crustal material (∼ 335 Ma and later). The results of our modeling suggest that delamination of the lithosphere, often invoked to explain the high temperature metamorphism in the orogenic lower crust of the Bohemian Massif, is not the only physical mechanism which can transfer a sufficient amount of heat to the crust to trigger its overturn.
Starting Page	595
Ending Page	619
Page Count	25
File Format	PDF
ISSN	00393169
Journal	Studia Geophysica et Geodaetica
Volume Number	56
Issue Number	2
e-ISSN	15731626
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-05-15
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	felsic granulites Moldanubian zone radiogenic heating delamination Structural Geology Meteorology/Climatology Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology Geophysics

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