The late‑Variscan high‑temperature collisional episode in the southwestern Moldanubian Zone (Bohemian Massif)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F23%3A00569487" target="_blank" >RIV/67985831:_____/23:00569487 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/22:10457990 RIV/00025798:_____/23:10169002

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s00531-022-02258-2" target="_blank" >https://link.springer.com/article/10.1007/s00531-022-02258-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00531-022-02258-2" target="_blank" >10.1007/s00531-022-02258-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The late‑Variscan high‑temperature collisional episode in the southwestern Moldanubian Zone (Bohemian Massif)

Popis výsledku v původním jazyce

This paper presents new structural, anisotropy of magnetic susceptibility (AMS), and petrological data in tandem with existing geochronological data to determine a polyphase Variscan tectonometamorphic event in the southwestern Moldanubian Zone of the Bohemian Massif. The high-grade metamorphic rocks of this Zone underwent the successive tectonometamorphic evolution (from ca. 360 to 310 Ma) that portrays three main geodynamic episodes: (a) The collisional to exhumation episode (ca. 360–335 Ma) recorded by the relict, steeply dipping, and ~ N(NNE) to S(SSW) striking foliation planes (S1) developed at temperatures of 720–754 °C and pressures of ca. 790 MPa (M1) and superimposed flat-lying foliation planes (S2) under temperatures of 674 ± 27 °C and pressures of 680 ± 110 MPa (M2). (b) The late-orogenic ~ N–S oriented shortening (ca. 335–325 Ma) controlled by convergence of a crustal segment derived from the Gondwana continent (newly named as the “Salzburgia Block) and the mostly consolidated Bohemian Massif. These collisional processes resulted in superimposition of the foliation planes (S3) dipping steeply to moderately to the ~ N to ~ NNE(NE), re-heating and metamorphic overprint at temperatures of 770–830 °C and pressures of 450–530 MPa (M3) and syn-tectonic emplacement of the numerous late-orogenic granitoids. (c) Subsequently, the switch in the paleostress regime from ~ N–S shortening to that of late-orogenic ~ ENE–WSW extension (ca. 325–310 Ma) led to the activation of regional right-lateral transtension and exhumation of the deep-seated rocks. Associated re-equilibration proceeded under temperatures of 662–701 °C and pressures of 362–437 MPa (M4 event). In the latter stages of this episode, the synchronous reactivation of the regional ~ NW–SE striking right-lateral shear zones (Pfahl and Danube) and the almost perpendicular ~ NNE(NE)–SSW(SW) striking left-lateral shear zones took place.

Název v anglickém jazyce

The late‑Variscan high‑temperature collisional episode in the southwestern Moldanubian Zone (Bohemian Massif)

Popis výsledku anglicky

This paper presents new structural, anisotropy of magnetic susceptibility (AMS), and petrological data in tandem with existing geochronological data to determine a polyphase Variscan tectonometamorphic event in the southwestern Moldanubian Zone of the Bohemian Massif. The high-grade metamorphic rocks of this Zone underwent the successive tectonometamorphic evolution (from ca. 360 to 310 Ma) that portrays three main geodynamic episodes: (a) The collisional to exhumation episode (ca. 360–335 Ma) recorded by the relict, steeply dipping, and ~ N(NNE) to S(SSW) striking foliation planes (S1) developed at temperatures of 720–754 °C and pressures of ca. 790 MPa (M1) and superimposed flat-lying foliation planes (S2) under temperatures of 674 ± 27 °C and pressures of 680 ± 110 MPa (M2). (b) The late-orogenic ~ N–S oriented shortening (ca. 335–325 Ma) controlled by convergence of a crustal segment derived from the Gondwana continent (newly named as the “Salzburgia Block) and the mostly consolidated Bohemian Massif. These collisional processes resulted in superimposition of the foliation planes (S3) dipping steeply to moderately to the ~ N to ~ NNE(NE), re-heating and metamorphic overprint at temperatures of 770–830 °C and pressures of 450–530 MPa (M3) and syn-tectonic emplacement of the numerous late-orogenic granitoids. (c) Subsequently, the switch in the paleostress regime from ~ N–S shortening to that of late-orogenic ~ ENE–WSW extension (ca. 325–310 Ma) led to the activation of regional right-lateral transtension and exhumation of the deep-seated rocks. Associated re-equilibration proceeded under temperatures of 662–701 °C and pressures of 362–437 MPa (M4 event). In the latter stages of this episode, the synchronous reactivation of the regional ~ NW–SE striking right-lateral shear zones (Pfahl and Danube) and the almost perpendicular ~ NNE(NE)–SSW(SW) striking left-lateral shear zones took place.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GF15-34621L" target="_blank" >GF15-34621L: Postkolizní plutonická aktivita v jihozápadní části Českého masivu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

International Journal of Earth Sciences

ISSN

1437-3254

e-ISSN

1437-3262

Svazek periodika

112

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

28

Strana od-do

631-658

Kód UT WoS článku

000884933100001

EID výsledku v databázi Scopus

2-s2.0-85142128867