(40)A/Ar-39 step-heating dating of phlogopite and kaersutite megacrysts from the Zelezna hurka (Eisenbuhl) Pleistocene scoria cone, Czech Republic

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dc.contributor.authorKrmíček, Lukášcs
dc.contributor.authorTimmerman, Martin J.cs
dc.contributor.authorZiemann, Martin A.cs
dc.contributor.authorSudo, Masafumics
dc.contributor.authorUlrych, Jaromírcs
dc.coverage.issue4cs
dc.coverage.volume71cs
dc.date.issued2020-08-15cs
dc.description.abstract(40)A/Ar-39 step-heating of mica and amphibole megacrysts from hauyne-bearing olivine melilitite scoria/tephra from the Zelezna hurka yielded a 435 +/- 108 ka isotope correlation age for phlogopite and a more imprecise 1.55 Ma total gas age of the kaersutite megacryst. The amphibole megacrysts may constitute the first, and the younger phlogopite megacrysts the later phase of mafic, hydrous melilitic magma crystallization. It cannot be ruled out that the amphibole megacrysts are petrogenetically unrelated to tephra and phlogopite megacrysts and were derived from mantle xenoliths or disaggregated older, deep crustal pegmatites. This is in line both with the rarity of amphibole at Zelezna hurka and with the observed signs of magmatic resorption at the edges of amphibole crystals.en
dc.formattextcs
dc.format.extent382-387cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationGEOLOGICA CARPATHICA. 2020, vol. 71, issue 4, p. 382-387.en
dc.identifier.doi10.31577/GeolCarp.71.4.6cs
dc.identifier.issn1335-0552cs
dc.identifier.orcid0000-0003-0943-9776cs
dc.identifier.other165866cs
dc.identifier.scopus36617317200cs
dc.identifier.urihttp://hdl.handle.net/11012/195623
dc.language.isoencs
dc.publisherEarth Science Institute, Slovak Academy of Sciencescs
dc.relation.ispartofGEOLOGICA CARPATHICAcs
dc.relation.urihttp://www.geologicacarpathica.com/browse-journal/volumes/71-4/article-954/cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1335-0552/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectBohemian Massifen
dc.subjectŽelezná hůrkaen
dc.subjectEisenbühlen
dc.subjectargon datingen
dc.subjectmicaen
dc.subjectamphiboleen
dc.subjectmelilititeen
dc.title(40)A/Ar-39 step-heating dating of phlogopite and kaersutite megacrysts from the Zelezna hurka (Eisenbuhl) Pleistocene scoria cone, Czech Republicen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-165866en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:44:35en
sync.item.modts2025.01.17 15:20:11en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav geotechnikycs
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