Geochronology of granites of the western Korosten AMCG complex (Ukrainian Shield): implications for the emplacement history and origin of miarolitic pegmatites

dc.contributor.authorShumlyanskyy, Leonid
dc.contributor.authorFranz, Gerhard
dc.contributor.authorGlynn, Sarah
dc.contributor.authorMytrokhyn, Oleksandr
dc.contributor.authorVoznyak, Dmytro
dc.contributor.authorBilan, Olena
dc.date.accessioned2022-01-17T14:51:57Z
dc.date.available2022-01-17T14:51:57Z
dc.date.issued2021-11-11
dc.description.abstractThe origin of large miarolitic (also known as “chamber”) pegmatites is not fully understood although they may have great economic value. The formation of cavities in magmatic bodies is related to melt degassing and gas or fluid flow through partially solidified magma. In this paper, the origin of the Volyn pegmatite field, located in the Palaeoproterozoic Korosten anorthosite–mangerite–charnockite–granite (AMCG) complex, North-Western region of the Ukrainian Shield, is discussed. Pegmatites of the field host deposits of piezoelectric quartz that is accompanied by gem-quality beryl and topaz. The Volyn pegmatite field is confined to granites located in the south-western part of the Korosten complex and extends for 22 km along the contact with the anorthosite massif within the Korosten plutonic complex. Geological data indicate hybridization of basic melts and partly crystallized granites, as well as direct impact of fluids derived from basic melts on the chamber pegmatites. The new U–Pb zircon ages obtained for granites and pegmatites of the Korosten complex confirm that the rock assemblage in the northern part of the complex crystallized between 1800 and 1780 Ma, whereas rocks in the southern part intruded mainly between 1768 and 1755 Ma. U–Pb zircon ages for granites from the south-western part of the Korosten complex indicate that granites were emplaced at 1770–1765 Ma, a few million years prior to the intrusion of the gabbro–anorthosite massif (1762–1758 Ma), while chamber pegmatites in these granites crystallized at 1760 ± 3 Ma, coevally with the basic rocks. Ultimately, the formation of the chamber pegmatites was related to the reheating of the semi-crystallized granitic intrusion and to fluids migrating from the underlying gabbro–anorthosite massif.en
dc.description.sponsorshipDFG, 414044773, Open Access Publizieren 2021 - 2022 / Technische Universität Berlinen
dc.identifier.eissn1617-4011
dc.identifier.issn0935-1221
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16142
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-14916
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc550 Geowissenschaftende
dc.subject.otherUkrainian Shielden
dc.subject.otherwestern Korosten AMCG complexen
dc.subject.othermiarolitic pegmatitesen
dc.subject.otherVolyn pegmatite fielden
dc.subject.otheranorthosite–mangerite–charnockite–granite complexen
dc.titleGeochronology of granites of the western Korosten AMCG complex (Ukrainian Shield): implications for the emplacement history and origin of miarolitic pegmatitesen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.5194/ejm-33-703-2021en
dcterms.bibliographicCitation.issue6en
dcterms.bibliographicCitation.journaltitleEuropean Journal of Mineralogyen
dcterms.bibliographicCitation.originalpublishernameCopernicusen
dcterms.bibliographicCitation.originalpublisherplaceGöttingenen
dcterms.bibliographicCitation.pageend716en
dcterms.bibliographicCitation.pagestart703en
dcterms.bibliographicCitation.volume33en
tub.accessrights.dnbfreeen
tub.affiliationFak. 6 Planen Bauen Umwelt>Inst. Angewandte Geowissenschaften>FG Angewandte Geochemiede
tub.affiliation.facultyFak. 6 Planen Bauen Umweltde
tub.affiliation.groupFG Angewandte Geochemiede
tub.affiliation.instituteInst. Angewandte Geowissenschaftende
tub.publisher.universityorinstitutionTechnische Universität Berlinen
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