The rise of the Brunovistulicum: age, geological, petrological and geochemical character of the Neoproterozoic magmatic rocks of the Central Basic Belt of the Brno Massif
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F19%3A00509342" target="_blank" >RIV/67985831:_____/19:00509342 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/19:10404563 RIV/00025798:_____/19:00000057
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs00531-019-01700-2" target="_blank" >https://link.springer.com/article/10.1007%2Fs00531-019-01700-2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s00531-019-01700-2" target="_blank" >10.1007/s00531-019-01700-2</a>
Alternative languages
Result language
angličtina
Original language name
The rise of the Brunovistulicum: age, geological, petrological and geochemical character of the Neoproterozoic magmatic rocks of the Central Basic Belt of the Brno Massif
Original language description
The Brno Massif is the largest exposed part of the Brunovistulicum (eastern Bohemian Massif) representing Precambrian basement incorporated into the Central European Variscan Belt. Two well-known Cadomian granodiorite complexes of magmatic-arc origin are separated by N-S-trending belt of mafic rocks previously compared to ophiolite. This so-called Central Basic Belt is formed by a slightly metamorphosed volcanic part (Metabasite Zone) in the east and dominantly plutonic Diorite Zone in the west. Our new geological, geochemical and isotopic data including U-Pb zircon dating reveal two distinct Precambrian magmatic events within the Central Basic Belt preceding the Cadomian arc. The geochemical signatures of the dominant late Tonian (c. 730Ma) tholeiitic basalts (epsilon Nd725=+7.8 to+6.7) in the Metabasite Zone suggest a direct derivation from a mantle source in an extensional setting. Also, the associated sporadic rhyolitic lavas and tuffs are primitive, showing a short mean crustal residence (epsilon Nd725=+6.0 and + 5.7, TDMNd(.2stg)0.9Ga). By contrast, the Cryogenian (c. 650Ma) magmatism of the Diorite Zone clearly demonstrates features of a magmatic-arc origin. Rather primitive whole-rock geochemistry and radiogenic Nd isotopic signature (epsilon Nd655 values typically falling between + 7 and + 6) show that this arc was either intraoceanic, or developed on recently accreted, immature mafic crust. Based on all the available data, three successive tectono-magmatic stages have been identified in the Brno Massif in the Neoproterozoic times (c. 730-600Ma), as products of a single long-lived, multi-stage subduction system spanning nearly full Neoproterozoic supercontinent cycle from the break-up of Rodinia to the assembly of Pannotia.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Earth Sciences
ISSN
1437-3254
e-ISSN
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Volume of the periodical
108
Issue of the periodical within the volume
4
Country of publishing house
DE - GERMANY
Number of pages
35
Pages from-to
1165-1199
UT code for WoS article
000471031400007
EID of the result in the Scopus database
2-s2.0-85064352344