Secondary compositional zoning of garnet from the high-grade metamorphic Gföhl Unit, Moldanubian Zone: constraints on relative cation diffusivities and geodynamic processes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10507693" target="_blank" >RIV/00216208:11310/25:10507693 - isvavai.cz</a>
Alternative codes found
RIV/00025798:_____/25:10169615
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lU39e9zSCZ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lU39e9zSCZ</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00410-025-02268-8" target="_blank" >10.1007/s00410-025-02268-8</a>
Alternative languages
Result language
angličtina
Original language name
Secondary compositional zoning of garnet from the high-grade metamorphic Gföhl Unit, Moldanubian Zone: constraints on relative cation diffusivities and geodynamic processes
Original language description
The garnets in garnet pyroxenites from centimetre- to several-hundred-metre-sized mafic lenses embedded in felsic high-pressure granulites of the Gföhl Unit (Moldanubian Zone, Bohemian Massif) are relics of an early high-pressure-high-temperature metamorphic stage related to Variscan subduction and continental collision. Subsequent isothermal decompression to granulite-facies conditions led to the partial replacement of garnet by plagioclase-bearing assemblages. Associated with the partial replacement, a pronounced secondary compositional zoning developed in the relic garnets, which indicates relatively fast diffusion of Fe and Mg and comparatively slow diffusion of Ca. Based on inverse diffusion modelling, cooling rates in the range of 7-150 C/Myr were estimated for the garnet pyroxenites, indicating rapid cooling and short-lived granulite-facies overprint after decompression. The petrological evidence is compatible with the extrusion of partially molten, buoyant felsic lithologies, which incorporated slivers of mafic lithologies en route. Through the heat they transported advectively, these lithologies produced perturbations of the thermal structure at mid-crustal levels, the decay times of which varied depending on the volumes of the hot material exhumed in different regions.
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
<a href="/en/project/GF20-24210L" target="_blank" >GF20-24210L: Moldanubian Deep crustal Metasomatism (MODEM)</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Contributions of Mineralogy and Petrology
ISSN
0010-7999
e-ISSN
1432-0967
Volume of the periodical
180
Issue of the periodical within the volume
11
Country of publishing house
DE - GERMANY
Number of pages
26
Pages from-to
82
UT code for WoS article
001586425900001
EID of the result in the Scopus database
2-s2.0-105018210650