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Exotic orthogneiss pebbles from Paleocene flysch of the Dukla Nappe (Outer Eastern Carpathians, Poland)
Paleocene
Outer Carpathians
Dukla Nappe
provenance
stratigraphy
geochemistry
petrography
orthogneissic pebbles
Bibliogr. s. 220-221
Crystalline exotic pebbles have been found in the deep-water flysch of the Cisna Beds, in the Dukla Nappe,Polish part of the Outer Western Carpathians. Most of them occur in a layer, which extends over a distance of at least 3 km within the SE limb of the Chryszczata-Wołosañ-Mała Rawka anticline. The dimensions of the pebbles vary be-tween 2 and 18 cm (middle axis). The exotic pebbles consist of three types of granite derived orthogneisses: 1 - medium-grained, medium-banded orthogneiss with alkali feldspar porphyroblasts showing structural features of foliatedgranitic-gneiss, 2 - medium-banded, medium-layered orthogneiss containing small microcline porphyroblasts and showing structural features of foliated granitic-gneiss, and 3 - strongly cataclastic granitic-gneiss with chess-board albiteporphyroblasts showing properties of partly mylonitized granite. The chemical composition of the orthogneisses indi-cates that the protolith was represented by peraluminous, poorly-evolved, S-type granites exhibiting features of orogen-related crustal granites. The discrimination shows that the protolith of the studied rocks evolved in active continentalmargin or continental collision environments. The biostratigraphical data on deep-water agglutinated Foraminifera suggest the position of the exotic-bearing layer in the lowermost part of the Rzehakina fissistomata Zone corresponding tothe lowermost Paleocene. Petrographic affinities between orthogneissic pebbles and mineral/rock fragments grains ofthe Cisna-type sandstones show that they have the same provenance. These deposits were transported from the NEextension of the Marmarosh massif, which had the character of a continental bearing source cordillera, formed mainly byorthogneissic and granitic rocks.
dc.abstract.en | Crystalline exotic pebbles have been found in the deep-water flysch of the Cisna Beds, in the Dukla Nappe,Polish part of the Outer Western Carpathians. Most of them occur in a layer, which extends over a distance of at least 3 km within the SE limb of the Chryszczata-Wołosañ-Mała Rawka anticline. The dimensions of the pebbles vary be-tween 2 and 18 cm (middle axis). The exotic pebbles consist of three types of granite derived orthogneisses: 1 - medium-grained, medium-banded orthogneiss with alkali feldspar porphyroblasts showing structural features of foliatedgranitic-gneiss, 2 - medium-banded, medium-layered orthogneiss containing small microcline porphyroblasts and showing structural features of foliated granitic-gneiss, and 3 - strongly cataclastic granitic-gneiss with chess-board albiteporphyroblasts showing properties of partly mylonitized granite. The chemical composition of the orthogneisses indi-cates that the protolith was represented by peraluminous, poorly-evolved, S-type granites exhibiting features of orogen-related crustal granites. The discrimination shows that the protolith of the studied rocks evolved in active continentalmargin or continental collision environments. The biostratigraphical data on deep-water agglutinated Foraminifera suggest the position of the exotic-bearing layer in the lowermost part of the Rzehakina fissistomata Zone corresponding tothe lowermost Paleocene. Petrographic affinities between orthogneissic pebbles and mineral/rock fragments grains ofthe Cisna-type sandstones show that they have the same provenance. These deposits were transported from the NEextension of the Marmarosh massif, which had the character of a continental bearing source cordillera, formed mainly byorthogneissic and granitic rocks. | pl |
dc.affiliation | Wydział Biologii i Nauk o Ziemi : Instytut Nauk Geologicznych | pl |
dc.contributor.author | Bąk, Krzysztof | pl |
dc.contributor.author | Wolska, Anna - 132729 | pl |
dc.date.accession | 2018-11-05 | pl |
dc.date.accessioned | 2018-11-13T08:48:27Z | |
dc.date.available | 2018-11-13T08:48:27Z | |
dc.date.issued | 2005 | pl |
dc.date.openaccess | 0 | |
dc.description.accesstime | w momencie opublikowania | |
dc.description.additional | Bibliogr. s. 220-221 | pl |
dc.description.number | 3 | pl |
dc.description.physical | 205-221 | pl |
dc.description.version | ostateczna wersja wydawcy | |
dc.description.volume | 56 | pl |
dc.identifier.eissn | 1336-8052 | pl |
dc.identifier.issn | 1335-0552 | pl |
dc.identifier.project | ROD UJ / OP | pl |
dc.identifier.uri | https://ruj.uj.edu.pl/xmlui/handle/item/59982 | |
dc.identifier.weblink | http://www.geologicacarpathica.com/browse-journal/volumes/56-3/article-310/# | pl |
dc.language | eng | pl |
dc.language.container | eng | pl |
dc.rights | Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 4.0 Międzynarodowa | * |
dc.rights.licence | CC-BY-NC-ND | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode | * |
dc.share.type | otwarte czasopismo | |
dc.subject.en | Paleocene | pl |
dc.subject.en | Outer Carpathians | pl |
dc.subject.en | Dukla Nappe | pl |
dc.subject.en | provenance | pl |
dc.subject.en | stratigraphy | pl |
dc.subject.en | geochemistry | pl |
dc.subject.en | petrography | pl |
dc.subject.en | orthogneissic pebbles | pl |
dc.subtype | Article | pl |
dc.title | Exotic orthogneiss pebbles from Paleocene flysch of the Dukla Nappe (Outer Eastern Carpathians, Poland) | pl |
dc.title.journal | Geologica Carpathica | pl |
dc.type | JournalArticle | pl |
dspace.entity.type | Publication |
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