Zapis waryscyjskiego metamorfizmu i deformacji w strefie kolizji terranu saksoturyńskiego z mikropłytą Brunovistulicum na przykładzie pasma metamorficznego Kamieńca Ząbkowickiego (Sudety Środkowe)

• Autorzy: Szczepański Jacek

Identyfikatory

DOI

10.7306/2025.84

Warianty tytułu

EN

A record of the Variscan metamorphism and deformation in the collision zone of the Saxothuringian terrane with the Brunovistulicum microplate – a case study of the Kamieniec Z¹bkowicki Metamorphic Belt (Central Sudetes)

• Języki publikacji: PL

Abstrakty

EN

The Kamieniec Ząbkowicki Metamorphic Belt (KMB) comprises a volcano-sedimentary succession exposed in a collision zone between domains of the European Variscides, interpreted as the Saxothuringian terrane and the Brunovistulian microplate. The studied rocks have preserved evidence of two metamorphic episodes. The first episode, M₁, occurred under high-pressure and low-temperature (HP-LT, 18 kbar and 480^oC) conditions, associated with burial of the KMB rocks in an east-directed subduction zone. The subsequent episode, M₂, took place during the final stages of exhumation to the middle crustal level, under medium-pressure and medium-temperature conditions (MP-MT, from 6 kbar and 520^oC, through 7 kbar and 555^oC, to 3-4 kbar and 590^oC). The meso- and microstructural record allows reconstructing three deformation stages. The D₁ stage is interpreted as due to subduction of the KMB rock succession, whereas the D₂ stage is considered as related to the subsequent exhumation. At that time, the PKZ underwent folding, a process that had begun under HP conditions (Mt metamorphic episode) and ended under MP conditions (M₂ metamorphic episode). The final deformation stage, D₃, must have corresponded to the final phases of exhumation. At that stage, granitoid veins and lenses were injected, which led to heating and rheological weakening of the KMB rock succession and gravitational collapse. This process resulted in the formation of shear zones with top-to-SW and W kinematics.

Słowa kluczowe

PL

historia tektonometamorficzna; metamorfizm wysokociśnieniowy; subdukcja; europejski pas waryscyjski; masyw czeski

EN

tectonometamorphic history; high-pressure metamorphism; subduction; European Variscan Belt; Bohemian Massif

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Przegląd Geologiczny
• Rocznik: 2025
• Tom: Vol. 73, nr 9
• Strony: 784--793
• Opis fizyczny: Bibliogr. 35 poz., fot., map., rys.

Twórcy

autor

Szczepański Jacek

• Instytut Nauk Geologicznych, Uniwersytet Wrocławski, ul. Cybulskiego 30, 50-204 Wrocław

• https://orcid.org/0000-0001-9087-8164

Bibliografia

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