Subduction-exhumation cycle recorded by calcite deformation microstructures: blueschist-facies metacarbonates and kinematic implications for deformation of the Meliata Unit (Western Carpathians)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10477682" target="_blank" >RIV/00216208:11310/23:10477682 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SSaFikG7oR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=SSaFikG7oR</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00531-023-02344-z" target="_blank" >10.1007/s00531-023-02344-z</a>
Alternative languages
Result language
angličtina
Original language name
Subduction-exhumation cycle recorded by calcite deformation microstructures: blueschist-facies metacarbonates and kinematic implications for deformation of the Meliata Unit (Western Carpathians)
Original language description
The Meliata Unit (Meliaticum) is a tectonic superunit of the Western Carpathians that incorporates the blueschists-facies Borka Nappe and the low-grade metasediments and polygenetic melange, Meliata Unit s.s., both occurring as scattered tectonic slices overlying the Gemeric Superunit. Calcitic marbles were sampled in a wide area within the Borka Nappe and blocks embedded in Jurassic oceanic sediments (Meliata Unit s.s.). Based on the microstructural evaluation and electron backscatter diffraction analysis (EBSD), the carbonates of the Borka Nappe experienced differential post-subduction P-T-D paths related to a collisional/exhumation setting following closure of the Neotethys-related "Meliata Ocean". Variations in the calcite deformation microstructures were used to distinguish three principal microstructural groups. The first group (G1) contains large columnar and lobate calcite grains (>= 1 mm) reflecting peak P-T conditions during subduction of the Meliata oceanic lithosphere. The second group (G2) exhibits dynamic recrystallization of the original G1 grains resulting in grain size reduction (< 0.5 mm) and shape-preferred orientation related to exhumation and formation of the accretionary complex. The third group (G3) shows a 'foam' microstructure with a uniform grain size (0.4-1 mm), sharp grain boundaries and triple junctions. The G3 microstructure may have been caused by a static recrystallization at elevated temperatures postdating the main deformation, and it is restricted to peripheries of the underlying Veporic metamorphic dome and probably is not associated with the Meliata sequences nor its tectono-metamorphic evolution. The corrected kinematic sections indicate dominantly ESE-WNW-trending lineations suggesting top-to-WNW kinematics of the Meliata subduction-exhumation process for G1 and G2 microstructures, and Gemeric-Veporic E-W orogen-parallel stretching for G3.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Earth Sciences
ISSN
1437-3254
e-ISSN
1437-3262
Volume of the periodical
112
Issue of the periodical within the volume
September 2023
Country of publishing house
DE - GERMANY
Number of pages
21
Pages from-to
2097-2117
UT code for WoS article
001094425600001
EID of the result in the Scopus database
2-s2.0-85170094814