Two-stage exhumation of subducted Saxothuringian continental crust records underplating in the subduction channel and collisional forced folding (Krkonoše-Jizera Mts., Bohemian Massif)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F16%3A00000089" target="_blank" >RIV/00025798:_____/16:00000089 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/16:10327826

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S0191814116300840" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0191814116300840</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jsg.2016.06.008" target="_blank" >10.1016/j.jsg.2016.06.008</a>

Result language

angličtina

Original language name

Two-stage exhumation of subducted Saxothuringian continental crust records underplating in the subduction channel and collisional forced folding (Krkonoše-Jizera Mts., Bohemian Massif)

Original language description

The Krkonoše-Jizera Massif in the northern part of the Variscan Bohemian Massif provides insight into the exhumation mechanisms for subducted continental crust. The studied region exposes a relatively large portion of a flat-lying subduction-related complex that extends approximately 50 km away from the paleosuture. wide extent of HP-LT metamorphism has been confirmed by new P-T estimates indicating temperatures of 400–450 °C at 14–16 kbar and 450–520 °C at 14–18 kbar for the easternmost and westernmost parts of the studied area, respectively. A detailed study of metamorphic assemblages associated with individual deformation fabrics together with analysis of quartz deformation microstructures and textures allowed characterisation of the observed deformation structures in terms of their subduction-exhumation memory. An integration of the lithostratigraphic, metamorphic and structural data documents a subduction of distal and proximal parts of the Saxothuringian passive margin to high-pressure conditions and their subsequent exhumation during two distinct stages. The initial stage of exhumation has an adiabatic character interpreted as the buoyancy driven return of continental material from the subduction channel resulting in underplating and progressive nappe stacking at the base of the Tepla-Barrandian upper plate. With the transition from continental subduction to continental collision during later stages of the convergence, the underplated high-pressure rocks were further exhumed due to shortening in the accretionary wedge. This shortening is associated with the formation of large-scale recumbent forced folds extending across the entire studied area.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

<a href="/en/project/GA13-16315S" target="_blank" >GA13-16315S: Prograde metamorphism, crustal thickening and lower crustal flow: new concept of building of crustal root in Variscan orogen</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Structural Geology

ISSN

0191-8141

e-ISSN

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Volume of the periodical

89

Issue of the periodical within the volume

August

Country of publishing house

GB - UNITED KINGDOM

Number of pages

16

Pages from-to

214-229

UT code for WoS article

000381535300016

EID of the result in the Scopus database

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