Determination of SiO2 Raman spectrum indicating the transformation from coesite to quartz in Gföhl migmatitic gneisses in the Moldanubian Zone, Czech Republic
Result 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.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Determination of SiO2 Raman spectrum indicating the transformation from coesite to quartz in Gföhl migmatitic gneisses in the Moldanubian Zone, Czech Republic
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 SiO2 Ramanova spektra určujícího transformaci z coesitu na křemen pro Gföhlské migmatické ruly v moldanubické zóně, Česká republika
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.
Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
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
2
Country of publishing house
JP - JAPAN
Number of pages
7
Pages from-to
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UT code for WoS article
000255518300006
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
DB - Geology and mineralogy
Year of implementation
2008