Devonian/Mississippian I-type granitoids in the Western Carpathians: A subduction-related hybrid magmatism
2013 (English)In: Lithos, ISSN 0024-4937, E-ISSN 1872-6143, Vol. 162, 27-36 p.Article in journal (Refereed) Published
SIMS zircon U-Pb dating of I-type granitoids from four Variscan crystalline basement outcrops in the Western Carpathians (Tribec, Nizke Tatry, Cierna Hora and Slovenske Rudohorie Mts.) implies that they originated between 367 and 353 Ma. Therefore, they belong to the earliest Variscan I-type granitoids. The oldest Devonian age at ca. 367-364 Ma is obtained from an enclave-bearing tonalite and associated dikes of the Tribe Mts. Several granodiorites from the Nizke Tatry, Vepor and Cierna Hora Mts. (353-357 Ma) show younger, Early Carboniferous ages. These data require a re-assessment of older models that explained the genesis of I-type granitoids in the Western Carpathians based on the assumption of younger, Middle to Upper Carboniferous ages. The I-type granite massifs of the Western Carpathians most probably originated in an arc-related environment within the Galatian superterrane, an assemblage of Gondwana derived fragments. The early age of I-type magmatism in the Western Carpathians marks the beginning of a north-dipping subduction of the Paleotethys ocean under Ibero-Ligerian and intra-Alpine terranes. We suggest a term "Proto-Tatricum" for that part of the Galatian superterrane where Devonian/Mississippian I-type granitoids were emplaced. Now the granitoids are incorporated as a part of crystalline basement into the Alpine Tatric and Veporic units within present West-Carpathian mountain chain.
Place, publisher, year, edition, pages
2013. Vol. 162, 27-36 p.
Zircon dating, I-type granitoids, Variscan orogen, Gondwana, Western Carpathians
Natural Sciences Earth and Related Environmental Sciences Geology
Research subject Earth Science with specialization in Mineral Chemistry, Petrology and Tectonics
IdentifiersURN: urn:nbn:se:uu:diva-199735DOI: 10.1016/j.lithos.2012.12.014ISI: 000317088200003OAI: oai:DiVA.org:uu-199735DiVA: diva2:621023