Evolution of microstructure and texture in a small-scale high-temperature marble shear zone from the Ossa-Morena Zone (Iberian Variscan Belt)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00642675" target="_blank" >RIV/67985530:_____/25:00642675 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/25:00389991

Výsledek na webu

<a href="https://revistes.ub.edu/index.php/GEOACTA/article/view/50257" target="_blank" >https://revistes.ub.edu/index.php/GEOACTA/article/view/50257</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1344/GeologicaActa2025.23.24" target="_blank" >10.1344/GeologicaActa2025.23.24</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of microstructure and texture in a small-scale high-temperature marble shear zone from the Ossa-Morena Zone (Iberian Variscan Belt)

Popis výsledku v původním jazyce

This research investigates microstructures and crystallographic preferred orientation in a high-temperature Variscan small-scale shear zone within marbles from the south-western Ossa-Morena Zone (Iberian Variscan Belt). Quantitative microstructural analysis, and crystallographic preferred orientation data obtained via neutron diffraction and electron backscatter diffraction mapping allowed to infer the deformation mechanisms and active slip systems. The primary S2 foliation, formed during the Variscan D2 deformation phase, is characterized by high-temperature grain boundary migration recrystallization mechanism, coupled with intracrystalline slip on the c(0001)<-12-10> system. Ductile shear zone development, marked by a coarse-grained microstructure with pronounced shape preferred orientation parallel to the shear plane, involved both high-temperature grain boundary migration recrystallization and intracrystalline dislocation creep, accommodated by f{-1012} <10-11> and r{10-14} <-2021> slip systems. These results indicate a high-temperature extensional origin for the S2 foliation and the shear zone formation during the D2 deformation event of the Ossa-Morena Zone, linked to thermal effects from the Beja Igneous Complex plutonism and regional partial melting driven by asthenosphere upwelling (~353–335Ma).

Název v anglickém jazyce

Evolution of microstructure and texture in a small-scale high-temperature marble shear zone from the Ossa-Morena Zone (Iberian Variscan Belt)

Popis výsledku anglicky

This research investigates microstructures and crystallographic preferred orientation in a high-temperature Variscan small-scale shear zone within marbles from the south-western Ossa-Morena Zone (Iberian Variscan Belt). Quantitative microstructural analysis, and crystallographic preferred orientation data obtained via neutron diffraction and electron backscatter diffraction mapping allowed to infer the deformation mechanisms and active slip systems. The primary S2 foliation, formed during the Variscan D2 deformation phase, is characterized by high-temperature grain boundary migration recrystallization mechanism, coupled with intracrystalline slip on the c(0001)<-12-10> system. Ductile shear zone development, marked by a coarse-grained microstructure with pronounced shape preferred orientation parallel to the shear plane, involved both high-temperature grain boundary migration recrystallization and intracrystalline dislocation creep, accommodated by f{-1012} <10-11> and r{10-14} <-2021> slip systems. These results indicate a high-temperature extensional origin for the S2 foliation and the shear zone formation during the D2 deformation event of the Ossa-Morena Zone, linked to thermal effects from the Beja Igneous Complex plutonism and regional partial melting driven by asthenosphere upwelling (~353–335Ma).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA22-12828S" target="_blank" >GA22-12828S: Nový pohled na interpretaci magnetických staveb za pomoci 3D mikrostrukturní analýzy, numerického modelování a kvantově mechanického popisu</a><br>

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 periodika

Geologica Acta

ISSN

1695-6133

e-ISSN

1696-5728

Svazek periodika

23

Číslo periodika v rámci svazku

2025

Stát vydavatele periodika

ES - Španělské království

Počet stran výsledku

22

Strana od-do

1-17

Kód UT WoS článku

001621251700001

EID výsledku v databázi Scopus

2-s2.0-105023694176