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Fluorcaphite from hydrothermally altered teschenites at Tichá, Outer Western Carpathians, Czech Republic: compositional variations and origin

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F17%3A10133516" target="_blank" >RIV/00023272:_____/17:10133516 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://dx.doi.org/10.1180/minmag.2017.081.016" target="_blank" >http://dx.doi.org/10.1180/minmag.2017.081.016</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1180/minmag.2017.081.016" target="_blank" >10.1180/minmag.2017.081.016</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Fluorcaphite from hydrothermally altered teschenites at Tichá, Outer Western Carpathians, Czech Republic: compositional variations and origin

  • Popis výsledku v původním jazyce

    Fluorcaphite [SrCaCa3(PO4)3F] is a rare strontium-calcium member of the apatite supergroup which was previously known only from the Khibiny and Lovozero alkaline complexes. This paper presents evidence of a third fluorcaphite occurrence. It was found in hydrothermally altered Lower Cretaceous teschenite, which forms an intrusive body (probably a sill) in the Lower Cretaceous siliciclastic flysch sediments at Tichá near Frenštát pod Radhoštem, Silesian Unit, Outer Western Carpathians (Czech Republic). Fluorcaphite occurs as an accessory mineral in hydrothermal veins and in an adjacent alteration zone within the host teschenite. Vein-hosted fluorcaphite forms euhedral crystals and skeletal crusts enclosed in analcime while the teschenite-hosted fluorcaphite forms small overgrowths on older phenocrysts of magmatic apatite. Fluorcaphite from Tichá contains 0.50-1.97 Sr apfu, 2.96-4.49 Ca apfu, 0.59-1.09 F apfu and significantly lower Na (0.01-0.05 apfu) and LREE contents (up to 0.07 apfu). Fluorcaphite formed under hydrothermal conditions after solidification of the host teschenite during post-magmatic hydrothermal activity at temperatures probably between c. 150 and 300oC. The initial 87Sr/86Sr ratio of vein-hosted analcime+fluorcaphite (0.7063) is significantly higher than those of the host teschenite (0.7041). We therefore suggest a mix of strontium sources in the vein analcime+fluorcaphite: (1) from the host teschenite plus (2) from external source(s) including the Lower Cretaceous seawater and/or surrounding sedimentary rocks of the Silesian Unit. These data indicate an open-system fluid regime and the participation of various fluid sources during the alteration event giving rise to fluorcaphite.

  • Název v anglickém jazyce

    Fluorcaphite from hydrothermally altered teschenites at Tichá, Outer Western Carpathians, Czech Republic: compositional variations and origin

  • Popis výsledku anglicky

    Fluorcaphite [SrCaCa3(PO4)3F] is a rare strontium-calcium member of the apatite supergroup which was previously known only from the Khibiny and Lovozero alkaline complexes. This paper presents evidence of a third fluorcaphite occurrence. It was found in hydrothermally altered Lower Cretaceous teschenite, which forms an intrusive body (probably a sill) in the Lower Cretaceous siliciclastic flysch sediments at Tichá near Frenštát pod Radhoštem, Silesian Unit, Outer Western Carpathians (Czech Republic). Fluorcaphite occurs as an accessory mineral in hydrothermal veins and in an adjacent alteration zone within the host teschenite. Vein-hosted fluorcaphite forms euhedral crystals and skeletal crusts enclosed in analcime while the teschenite-hosted fluorcaphite forms small overgrowths on older phenocrysts of magmatic apatite. Fluorcaphite from Tichá contains 0.50-1.97 Sr apfu, 2.96-4.49 Ca apfu, 0.59-1.09 F apfu and significantly lower Na (0.01-0.05 apfu) and LREE contents (up to 0.07 apfu). Fluorcaphite formed under hydrothermal conditions after solidification of the host teschenite during post-magmatic hydrothermal activity at temperatures probably between c. 150 and 300oC. The initial 87Sr/86Sr ratio of vein-hosted analcime+fluorcaphite (0.7063) is significantly higher than those of the host teschenite (0.7041). We therefore suggest a mix of strontium sources in the vein analcime+fluorcaphite: (1) from the host teschenite plus (2) from external source(s) including the Lower Cretaceous seawater and/or surrounding sedimentary rocks of the Silesian Unit. These data indicate an open-system fluid regime and the participation of various fluid sources during the alteration event giving rise to fluorcaphite.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10504 - Mineralogy

Návaznosti výsledku

  • Projekt

  • Návaznosti

    V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Ostatní

  • Rok uplatnění

    2017

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Mineralogical Magazine

  • ISSN

    0026-461X

  • e-ISSN

  • Svazek periodika

    81

  • Číslo periodika v rámci svazku

    6

  • Stát vydavatele periodika

    GB - Spojené království Velké Británie a Severního Irska

  • Počet stran výsledku

    17

  • Strana od-do

    1485-1501

  • Kód UT WoS článku

    000419618300010

  • EID výsledku v databázi Scopus