Podrobnosti záznamu

Název
    Metamorphic evolution of the contact aureole of the Dipilto Batholith, Eastern Chortis Terrane, Nicaragua
Autor
    Buriánek, David
    Dolníček, Zdeněk
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Journal of Geosciences
Svazek/č.
    Roč. 56, č. 2011
Strany
    17
Rok
    2011
Výraz tezauru
    low-pressure metamorphism, fluid inclusions, calc-silicate rocks, Dipilto Batholith, Nicaragua, Eastern Chortis Terrane
Klíčové slovo
    Aureole
    Batholith
    Chortis
    Contact
    Dipilto
    Eastern
    Evolution
    Metamorphic
    Nicaragua
    Terrane
Abstrakt (anglicky)
   We examined the tectono-metamorphic evolution of the contact aureole around the Cretaceous Dipilto Batholith in the Eastern Chortis Terrane. Three distinct metamorphic phases were distinguished. The first phase represented greenschist-facies regional metamorphism (M1) accompanied by a prograde deformation (D1). The Cretaceous contact-metamorphic event (M2) produced the peak-metamorphic mineral assemblages Wo + Di + Grs + Ves + Qtz + Pl + Kfs in the calc-silicate rocks and Bt + Qtz + Ab + And ? Crd ? Gr ? Chl ? Ms ? Kfs in the metapelites. The estimated P-T conditions near the contact with granitoids are 500-650 °C and ~ 0.2 GPa and coexisting fluids were relatively poor in CO2. The emplacement of the Dipilto Batholith at shallow crustal levels was rarely accompanied by weak deformation of the metasediments (D2). During cooling and exhumation, the contact aureole was locally affected by deformation (D3) and retrograde metamorphism (M3) again under greenschist-facies conditions.
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014