Geochronology of the metamorphic basement, Transdanubian part of the Tisza Mega-Unit

Gyöngyi Lelkes-Felvári; Wolfgang Frank

doi:10.1556/ageol.49.2006.3.1

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Acta Geologica Hungarica

Volume/Issue:: Volume 49: Issue 3

Geochronology of the metamorphic basement, Transdanubian part of the Tisza Mega-Unit

Authors:

Gyöngyi Lelkes-Felvári

Gyöngyi Lelkes-Felvári
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Wolfgang Frank

Wolfgang Frank
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Pages:: 189–206

Online Publication Date:: 15 Jun 2007

Publication Date:: 01 Sep 2006

Article Category:: Research Article

DOI:: https://doi.org/10.1556/ageol.49.2006.3.1

Keywords:: Hungary; amphibolite facies; Ar/Ar; K/Ar and Rb/Sr geochronology; Variscan; Tisza Mega-Unit; Gresten beds; Transdanubia

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The results of seven new ⁴⁰ Ar/ ³⁹ Ar analyses and two K/Ar analyses of mineral separates of metamorphic rocks from the Transdanubian part (west of the Danube River) of the Tisza Mega-Unit is presented, and a review of the geochronological data available in the literature is given. Investigated rocks come from boreholes and include amphibolite facies rocks, mainly containing garnet, staurolite, kyanite, andalusite and sillimanite as index minerals. The investigated area covers 120 × 85 km in Transdanubia, including all tectonic units distinguished by previous authors. The ⁴⁰ Ar/ ³⁹ Ar spectra of the muscovites yielded fairly well-established plateau ages ranging from 307 Ma-312 Ma in all units. Similar muscovite Ar/Ar cooling ages of ca 310 Ma were obtained from other parts of Tisza Mega-unit east of the Danube, e.g. from the kyanite-sillimanite-bearing metapelites of the Villány-Bihar Subunit (Great Plain; Lelkes-Felvári et al. 2003).

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Acta Geologica Hungarica

Print ISSN:: 0236-5278

Online ISSN:: 1588-2594

Acta Geologica Hungarica
Language	English
Size
Year of Foundation	1952
Publication Programme	changed title
Volumes per Year
Issues per Year
Founder	Magyar Tudományos Akadémia
Founder's Address	H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher	Akadémiai Kiadó
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5278 (Print)
ISSN	1588-2594 (Online)