Evolution of a Cambro-Ordovician active margin in northern Gondwana: Geochemical and zircon geochronological evidence from the Góry Sowie metasedimentary rocks, Poland
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000104" target="_blank" >RIV/00025798:_____/21:00000104 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.gr.2020.10.011" target="_blank" >https://doi.org/10.1016/j.gr.2020.10.011</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.gr.2020.10.011" target="_blank" >10.1016/j.gr.2020.10.011</a>
Alternative languages
Result language
angličtina
Original language name
Evolution of a Cambro-Ordovician active margin in northern Gondwana: Geochemical and zircon geochronological evidence from the Góry Sowie metasedimentary rocks, Poland
Original language description
The Góry Sowie Massif (GSM) in Poland represents a Devonian HP‒UHP terrane dominated by paragneiss, with subordinate orthogneiss, metabasite and granulite. Whole-rock geochemistry of four migmatitic paragneiss and five granulite samples from the northern part of the GSM was combined with U‒Pb‒Lu‒Hf isotopic data on zircon in order to constrain the sedimentary provenance, tectonic setting and paleogeographic location of the sedimentary paleo-basins now forming the GSM. Granulite and paragneiss protoliths are geochemically analogous to flysch-like graywacke and point either to a continental arc or an active continental margin setting dominated by Cambrian felsic arc detritus. Detrital zircon age spectra record abundant Ediacaran to Cambrian population (493‒545 Ma) and few Palaeoproterozoic to Neoarchean clusters (1830‒2280 Ma and 2400‒2700 Ma), reflecting a peri-Gondwana provenance in vicinity of the Trans-Saharan belt and place firm constraints on the maximum depositional age of c. 6‒517 Ma for the paragneiss and of c. 493‒2 Ma for the granulite, respectively. The zircon overgrowth rims give two age clusters, one c. 400 Ma that possibly record a HP/HT metamorphic event, and the other c. 385 Ma that probably record time of migmatization during exhumation. This tectono-thermal event is coeval with emplacement of the Devonian ophiolitic rocks surrounding the GSM. The GSM rock association, degree and timing of metamorphism and coeval ophiolite emplacement resemble closely the Galicia-Trás-os-Montes middle and upper allochthonous units in the NW Iberia and the Münchberg Massif in Germany. Therefore, we suggest that all these massifs were not too distant before Devonian and could form part of the same tectonically dismembered terrane or archipelago located along the northern periphery of the Gondwana margin during Cambro‒Ordovician.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA19-25035S" target="_blank" >GA19-25035S: Granulite–migmatite domes - insights to Devonian and Carboniferous evolution in the Variscan belt</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Gondwana research
ISSN
1342-937X
e-ISSN
—
Volume of the periodical
90
Issue of the periodical within the volume
February
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
26
Pages from-to
1-26
UT code for WoS article
000617131800001
EID of the result in the Scopus database
2-s2.0-85096238984