The Moldanubian Units-A Broad Insight into Deeper Parts of the Variscan Orogen

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169865" target="_blank" >RIV/00025798:_____/25:10169865 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/https://doi.org/10.1007/978-3-031-82911-6_17" target="_blank" >https://doi.org/https://doi.org/10.1007/978-3-031-82911-6_17</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-031-82911-6" target="_blank" >10.1007/978-3-031-82911-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Moldanubian Units-A Broad Insight into Deeper Parts of the Variscan Orogen

Popis výsledku v původním jazyce

The Moldanubian Units Sensu Stricto (MUSS) is an assemblage of high-grade metamorphic rocks corresponding to the deeper Variscan &quot;orogenic root domain&quot;. The MUSS portrays the results of multiple geodynamic episodes in the Variscan Orogen, namely: (a) Building of the orogenic root domain (~ 390-346 Ma) in response to the onset of ~ SE(ESE)-directed continental subduction and crustal thickening, which proceeded under HT-HP metamorphic conditions. This event gave rise to compressional (transpressional) ~ NNE-SSW striking foliation fabrics (S1), synchronous with the emplacement of a large number of calc-alkaline &quot;arc-related&quot; granitoids, particularly along the boundary between the Teplá-Barrandian Zone and the MUSS. (b) Collapse of the orogenic root and rapid crustal exhumation of deep-seated rocks at ~ 346-335 Ma. These processes were associated with the ascent of U(HP) rocks, a regional retrograde HT-MP(LP) isothermal overprint, and extensive decompression melting. This resulted in the overall subvertical shortening in the mid-crustal level giving rise to subhorizontal exhumation-related fabrics (S2) and the emplacement of (ultra)potassic, magnesium rich granitoids (durbachites). Synchronous oblique ~ SW(SSW) directed underthrusting of the Brunia microcontinent beneath the eastern flank of the MUSS was active at ~ 346-335 Ma. (c) The late-orogenic convergence characterized by high-heat flow and voluminous magmatism (~335 to 325 Ma) ensued with ~ N-S shortening driven by the convergence of the crustal segment derived from the Gondwana continent. The convergence was accompanied by significant re-heating, HT metamorphic overprint, and additional melting. Associated regional ~ W(NW)-E(SE) striking foliation (S3) and the extensive, syn- to post-tectonic, crustally derived granites intruded as the Moldanubian Batholith. These processes were accompanied by the &quot;gravity-driven&quot; exhumation of ~ NNE-SSW trending migmatite-granite Pelhřimov Core Complex (PC) that ensued in the context of the fading oblique underthrusting of the Brunia microcontinent. (d) Subsequently, the post-collisional extension and cooling (~ 325-300 Ma) continued accompanied by the emplacement of the post-collisional peraluminous to calc-alkaline granitoids (up to ~ 300 Ma) and localized right-lateral shearing (transtension) along ~ NW(WNW)-SE(ESE) and ~ NE(NNE)-SW(SSW) striking shear zones.

Název v anglickém jazyce

The Moldanubian Units-A Broad Insight into Deeper Parts of the Variscan Orogen

Popis výsledku anglicky

The Moldanubian Units Sensu Stricto (MUSS) is an assemblage of high-grade metamorphic rocks corresponding to the deeper Variscan &quot;orogenic root domain&quot;. The MUSS portrays the results of multiple geodynamic episodes in the Variscan Orogen, namely: (a) Building of the orogenic root domain (~ 390-346 Ma) in response to the onset of ~ SE(ESE)-directed continental subduction and crustal thickening, which proceeded under HT-HP metamorphic conditions. This event gave rise to compressional (transpressional) ~ NNE-SSW striking foliation fabrics (S1), synchronous with the emplacement of a large number of calc-alkaline &quot;arc-related&quot; granitoids, particularly along the boundary between the Teplá-Barrandian Zone and the MUSS. (b) Collapse of the orogenic root and rapid crustal exhumation of deep-seated rocks at ~ 346-335 Ma. These processes were associated with the ascent of U(HP) rocks, a regional retrograde HT-MP(LP) isothermal overprint, and extensive decompression melting. This resulted in the overall subvertical shortening in the mid-crustal level giving rise to subhorizontal exhumation-related fabrics (S2) and the emplacement of (ultra)potassic, magnesium rich granitoids (durbachites). Synchronous oblique ~ SW(SSW) directed underthrusting of the Brunia microcontinent beneath the eastern flank of the MUSS was active at ~ 346-335 Ma. (c) The late-orogenic convergence characterized by high-heat flow and voluminous magmatism (~335 to 325 Ma) ensued with ~ N-S shortening driven by the convergence of the crustal segment derived from the Gondwana continent. The convergence was accompanied by significant re-heating, HT metamorphic overprint, and additional melting. Associated regional ~ W(NW)-E(SE) striking foliation (S3) and the extensive, syn- to post-tectonic, crustally derived granites intruded as the Moldanubian Batholith. These processes were accompanied by the &quot;gravity-driven&quot; exhumation of ~ NNE-SSW trending migmatite-granite Pelhřimov Core Complex (PC) that ensued in the context of the fading oblique underthrusting of the Brunia microcontinent. (d) Subsequently, the post-collisional extension and cooling (~ 325-300 Ma) continued accompanied by the emplacement of the post-collisional peraluminous to calc-alkaline granitoids (up to ~ 300 Ma) and localized right-lateral shearing (transtension) along ~ NW(WNW)-SE(ESE) and ~ NE(NNE)-SW(SSW) striking shear zones.

Druh

C - Kapitola v odborné knize

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

The Variscan Orogen of Central Europe

ISBN

978-3-031-82910-9

Počet stran výsledku

24

Strana od-do

527-550

Počet stran knihy

1033

Název nakladatele

Springer

Místo vydání

Switzerland

Kód UT WoS kapitoly

—