Age determination of thorianite in phlogopite-bearing spinel-garnet peridotite in the Gföhl Unit, Moldanubian Zone of the Bohemian Massif

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F08%3A00311361" target="_blank" >RIV/67985831:_____/08:00311361 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Age determination of thorianite in phlogopite-bearing spinel-garnet peridotite in the Gföhl Unit, Moldanubian Zone of the Bohemian Massif

Original language description

The Raman spectroscopy SiO2 inclusions in zircon separates from Gfohl migmatitic gneisses in the Nové Dvory area shows that most of the SiO2 inclusions are composed of quartz with clear and intense peaks at 464, 393, 266, 207 and 125 cm(-1). It also reveals that a few SiO2 inclusions have a weak but clear peak at 521 cm(-1), which is the most fundamental vibration of coesite, along with typical quartz vibrations mentioned above. The Raman spectrum is composed of the intense vibrations of quartz at 464,393 and 266 cm(-1) of quartz and the weak vibration of coesite at 521 cm(-1) is obtained from the relict coesite inclusion in the pyrope of ultra-high-pressure (UHP) rocks in Dora Maira Massif. A similar Raman spectrum has been obtained for quartz transformed from coesite in UHP rocks of the Sulu belt, eastern China. Therefore, we propose that the SiO2 phase whose Raman spectrum shows a weak vibration at 521 cm(-1) existed as coesite in the past.

Czech name

Určení stáří thorianitu ve spinel-granátickém peridotitu s flogopitem v gföhlské jednotce, moldanibická zóna Českého masivu

Czech description

Pomocí Ramanovy spektroskopie byly v křemenných inkluzích migmatitických rul gfohlské jednotky (lokalita Nové Dvory) zaznamenány relikty coesitu svědčící pro to, že hornina prodělala ultra-vysoké tlakové podmínky.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Mineralogical and Petrological Sciences

ISSN

1345-6296

e-ISSN

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Volume of the periodical

103

Issue of the periodical within the volume

4

Country of publishing house

JP - JAPAN

Number of pages

6

Pages from-to

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UT code for WoS article

000258865000009

EID of the result in the Scopus database

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