Detail publikace

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

KRMÍČEK, L. TIMMERMAN, M. J. ZIEMANN, M. A. SUDO, M. ULRYCH, J.

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

(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.

Klíčová slova

Bohemian Massif; Železná hůrka; Eisenbühl; argon dating; mica; amphibole; melilitite

Autoři

KRMÍČEK, L.; TIMMERMAN, M. J.; ZIEMANN, M. A.; SUDO, M.; ULRYCH, J.

Vydáno

15. 8. 2020

Nakladatel

Earth Science Institute, Slovak Academy of Sciences

Místo

Bratislava

ISSN

1335-0552

Periodikum

GEOLOGICA CARPATHICA

Ročník

71

Číslo

4

Stát

Slovenská republika

Strany od

382

Strany do

387

Strany počet

8

URL

http://www.geologicacarpathica.com/browse-journal/volumes/71-4/article-954/

Plný text v Digitální knihovně

http://hdl.handle.net/11012/195623

BibTex

@article{BUT165866,
  author="Lukáš {Krmíček} and Martin J. {Timmerman} and Martin A. {Ziemann} and Masafumi {Sudo} and Jaromír {Ulrych}",
  title="(40)A/Ar-39 step-heating dating of phlogopite and kaersutite megacrysts from the Zelezna hurka (Eisenbuhl) Pleistocene scoria cone, Czech Republic",
  journal="GEOLOGICA CARPATHICA",
  year="2020",
  volume="71",
  number="4",
  pages="382--387",
  doi="10.31577/GeolCarp.71.4.6",
  issn="1335-0552",
  url="http://www.geologicacarpathica.com/browse-journal/volumes/71-4/article-954/"
}