Chronology of the Saxothuringian subduction in the West Sudetes (Bohemian Massif, Czech Republic and Poland)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10394404" target="_blank" >RIV/00216208:11310/19:10394404 - isvavai.cz</a>

Alternative codes found

RIV/00025798:_____/19:00000077

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WDliy.arpq" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WDliy.arpq</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/jgs2018-173" target="_blank" >10.1144/jgs2018-173</a>

Result language

angličtina

Original language name

Chronology of the Saxothuringian subduction in the West Sudetes (Bohemian Massif, Czech Republic and Poland)

Original language description

Isotopic dating of monazite and garnet from high-pressure metamorphic rocks exposed in the northern part of the Saxothuringian palaeo-suture in the Bohemian Massif revealed a diachronous metamorphism of various rock types that are now closely associated within allochthonous units representing the Devonian-Carboniferous subduction-accretionary complex. Mafic blueschists of the middle unit yielded a Lu-Hf garnet age of 363.9 +/- 1.3 Ma. The blueschists occur within high-pressure, garnet-free phyllites. Monazite extracted from this rock type yielded a U-Pb isotope dilution thermal ionization mass spectrometry age of 336.5 +/- 0.5 Ma. Garnet-bearing micaschist of the lower unit contains monazite with a U-Pb secondary ion mass spectrometry age of 341 +/- 3 Ma, consistent with Lu-Hf garnet-whole-rock ages of 344.5 +/- 1.3 and 342 +/- 7 Ma obtained from the same rock type. Existing tectonic models of the Bohemian Massif, and particularly of its northern part, assume that the period of oceanic subduction was terminated at c. 380-375 Ma by the arrival of an attenuated Saxothuringian continental crust, which was partly subducted and partly relaminated underneath the overriding Tepla-Barrandian Domain. However, our data, as well as data from mafic high-pressure rocks in the southern part of the Saxothuringian Domain, suggest that the initial collision was probably caused by the arrival of a smaller crustal block present within the Saxothuringian oceanic domain. After its subduction and relamination, the oceanic subduction was re-established and terminated by continental subduction and later collision of the Saxothuringian passive margin at c. 345-335 Ma.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA17-22207S" target="_blank" >GA17-22207S: The role of inherited continental margin architecture on early Variscan convergence</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Name of the periodical

Journal of the Geological Society

ISSN

0016-7649

e-ISSN

—

Volume of the periodical

176

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

492-504

UT code for WoS article

000467147200007

EID of the result in the Scopus database

2-s2.0-85065120384