Výsledky vyhľadávania
Názov On the origin of vesuvianite-rich rodingites from the Western Carpathians, Slovakia Aut.údaje Juraj Butek, Michel Grégorie, Ján Spišiak, Stéphanie Duchene, Richard Kopáčik Autor Butek Juraj 1993- (80%) UMBFP01 - Katedra geografie a geológie
Spoluautori Grégoire Michel (1%)
Spišiak Ján 1953- (15%) UMBFP01 - Katedra geografie a geológie
Duchene Stéphanie (1%)
Kopáčik Richard 1995- (3%) UMBFP01 - Katedra geografie a geológie
Zdroj.dok. Lithos. Vol. 432-433 (2022), pp. 1-19, art. no. 106902. - Amsterdam : Elsevier B.V., 2022 Kľúč.slová vezuvianity - vesuvianites metasomatóza - metasomatism rodingitizácia - rodingitization Heslá geogr. Západné Karpaty (pohorie) Form.deskr. články - journal articles Jazyk dok. angličtina Krajina Holandsko Anotácia Rodingite represents a particular metasomatic rock type that occurs as dykes or lenses in association with serpentinized ultramafic rocks and typically consists of Ca-rich, often hydrated silicate minerals. Rodingites have been recognized as a source of information on fluid compositions and their circulation in both ocean floor and subduction environments. Yet, the nature of the protoliths, the chemistry and the origin of fluids, the details of fluid-rock interaction, and the metamorphic context remain often obscure. This work investigates some of these questions in the case of rodingites from the Western Carpathians through petrological, mineralogical and geochemical studies. Rodingites are here associated in the field with serpentinized tectonically dismembered bodies of ultramafic rocks embeded into Carboniferous metasediments. They mostly consist of vesuvianite, diopside, and hydrated garnet with minor titanite, chlorite, epidote, calcite and Fe–Ti oxides. Three successive hydrothermal events were recognized: 1) formation of diopside, vesuvianite and garnet, 2) formation of a second generation of vesuvianite and garnet together with titanite and minor chlorite, and 3) formation of a mineral assemblage consisting of epidote, chlorite and calcite. The first two events represent a pervasive and intense rodingitization process, whereas the third one represents late, channeled, fluid circulation under greenschist facies conditions. The presence of Fe–Ti oxides influences the mineralogy and the whole rock chemistry of the investigated rodingites. Rutile and ilmenite are commonly associated with titanite and garnet, and whole rock analyses can reach up to 9.2 wt% TiO2. Vesuvianite and garnet also incorporate a significant amount of titanium. The lack of primary minerals, the mineral composition as well as high CaO and low SiO2 contents demonstrate high extent of Ca-metasomatism. The high modal amount of vesuvianite and the immobility of Al during metasomatic processes suggest that the protolith was relatively Al-rich. Taking into account the REE patterns of whole-rock and minerals, the high TiO2 content and the local Fe-Ti-rich accumulations, we suggest that the protoliths were more or less Fe-Ti-rich gabbroic rocks initially occurring in association with the serpentinized ultramafic body. URL Link na plný text Kategória publikačnej činnosti ADC Číslo archívnej kópie 52676 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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