Record details

Title
    Zircon typology, geochronology and whole rock Sr-Nd isotope systematics of the Mecsek Mountain granitoids in the Tisia Terrane (Hungary)
Statement of responsibility
    U.S. Klötzli, G. Buda, T. Skiöld
Author
    Buda, G.
    Klötzli, U. S.
    Skiöld, T.
Language
    anglicky
Source title - serial
    Mineralogy and petrology
Vol./nr.
    Vol. 81, no. 1-2
Pages
    p. 113-134
Year
    2004
Notes
    8 obr.
    Bibliografie na s. 131-134
    il.
    Zkr. název ser.: Mineral. and Petrology
Classfication no.
    550.4
    552
Conspectus category
    55
    552
Subject group
    datování Pb/Pb
    datování Rb/Sr
    datování Sm/Nd
    datování U/Th/Pb
    granitoidy
    moldanubický pluton
    moldanubikum
    morfologie krystalu
    paleogeografie
    složení draselné
    středočeský pluton
    terán
    vrásnění variské
    zirkon
Geographical name
    Benešovská pahorkatina-Čertovo břemeno
    ČR
    Jihlava
    Maďarsko
    Rakousko-Niederösterreich
    Třebíč
Keyword
    Geochronology
    Granitoids
    Hungary
    Isotope
    Mecsek
    Mountain
    Rock
    Sr-Nd
    Systematics
    Terrane
    Tisia
    Typology
    Whole
    Zircon
Abstract (in english)
   Zircon typology and ages together with petrological data suggest similarities in the origin of the K-Mg-rich granitoids of the Mecsek Mountains (Mórágy Unit, Tisia Terrane, S Hungary) and the durbachitic to K-Mg-rich rocks of the South and Central Bohemian Batholiths. Our investigations evidence a characteristic bimodal distribution of zircon types and ages. Zircons of "normal" magmatic habit and a typology around S24 show an age of 354 +- 5 Ma. Zircons of tabular habit of subtype S4 indicate a possibly younger age of 339 +- 1O Ma. The ages and typology of zircons from plutonic rocks in the Mecsek Mountains strongly resemble those from the Rastenberg granodiorite in the South Bohemian Batholith (Austria). This, as well as Rb/Sr and Sm/Nd isotope systematics, support the assumption of simultaneous formation and close spatial relationship between the Mecsek Mountain granitoids and the Rastenberg granodiorite.
   Thus, the Mecsek Mountains granitoids likely formed in a Late Palaeozoic palaeo-position S or SSW of the Rastenberg granodiorite. Having experienced a similar metamorphic and magmatic evolution during the Carboniferous, at least the northernmost part of the Tisia Terrane, the Mórágy Unit, is therefore considered to represent a former part of the Helvetic-Moldanubian zone
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    31. 5. 2007
Import date
    8. 8. 2012