Interplay between fluid circulation and Alpine metamorphism in the Monte Rosa whiteschist from white mica and quartz in situ oxygen isotope analysis by SIMS

Details

Serval ID
serval:BIB_17A189DEFB4C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Interplay between fluid circulation and Alpine metamorphism in the Monte Rosa whiteschist from white mica and quartz in situ oxygen isotope analysis by SIMS
Journal
American Mineralogist
Author(s)
Luisier Cindy, Baumgartner Lukas P., Bouvier Anne-Sophie, Putlitz Benita
ISSN
0003-004X
1945-3027
Publication state
Published
Issued date
01/05/2022
Peer-reviewed
Oui
Volume
107
Number
5
Pages
860-872
Language
english
Abstract
In situ oxygen isotope compositions of white mica and quartz have been used to characterize the interplay of metamorphism and fluid events between a metasomatic whiteschist and its granite protolith in the Monte Rosa nappe, Western Alps. New natural muscovite and phengite reference materials were calibrated for in situ Secondary Ion Mass Spectrometry (SIMS) oxygen isotope measurement. White mica and quartz oxygen isotope compositions were measured in situ in one whiteschist and two metagranites. Based on microtextural observation, phengite composition of white mica, and phase petrology modeling, it is possible to identify two events of fluid infiltration and one event of fluid expulsion, all of which were responsible for forming this unique whiteschist occurrence and for tracing its metamorphic evolution from late Permian intrusion to Alpine subduction and finally to the present day, exhumed whiteschist.
Keywords
Alpine Orogeny, Alps, dehydration, Europe, fluid phase, framework silicates, granites, igneous rocks, intrusions, ion probe data, isotope fractionation, isotope ratios, isotopes, mass spectra, metaigneous rocks, metamorphic rocks, metamorphism, metasomatic rocks, mica group, Monte Rosa, muscovite schist, nappes, O-18/O-16, orogeny, oxygen P-T conditions, Paleozoic, Permian, plutonic rocks, quartz, regional metamorphism, schists, serpentinite, sheet silicates, silica minerals, silicates, spectra, stable isotopes, water-rock interaction, Western Alps, Piemonte-Liguria Ocean
Web of science
Open Access
Yes
Create date
16/05/2022 11:28
Last modification date
16/07/2024 7:09
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