Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif
Identifieur interne : 002E07 ( Istex/Corpus ); précédent : 002E06; suivant : 002E08Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif
Auteurs : P. Štípská ; R. PowellSource :
- Journal of Metamorphic Geology [ 0263-4929 ] ; 2005-10.
English descriptors
- KwdEn :
- American mineralogist, Anorthite, Antiperthite, Antiperthite grains, Antiperthite inclusions, Assemblage, Biotite, Blackwell publishing, Bohemian, Bohemian massif, Carswell, Clinopyroxene, Compositional, Coronitic garnet, Crustal, Crystallization, Crystallization interval, Czech, Czech republic, Decompression, Earth sciences, Eclogites, Eld, Elkins grove, European journal, Exsolution, Facies, Feldspar, Felsic, Felsic matrix, Fiala, Fuhrman, Fuhrman lindsley, Garnet, Garnet growth, Garnet incl, Garnet proportion, Garnet zoning, Gfohl unit, Granulite, Granulite massifs, Granulites, Grossular, Grossular content, Growth zoning, High grossular content, High temperature, Holland powell, Hydrous, Igneous, Igneous crystallization, Igneous protolith, Inclusion, Isopleth, Jawecki, Kbar, Krone, Lamella, Lindsley, Lower austria, Lower pressure, Lower temperature, Magma, Magmatic, Magmatic rocks, Massif, Matrix, Metamorphic, Metamorphic conditions, Metamorphic geology, Metamorphic history, Metamorphic origin, Metamorphic peak, Metamorphic rocks, Metamorphism, Mineral assemblage, Mineral assemblages, Mineralogist, Moldanubian, Moldanubian granulites, Moldanubian zone, Muscovite, Orthopyroxene, Orthopyroxene granulites, Owen dostal, Peak pressure, Perthite, Petrakakis, Petrakakis jawecki, Petrology, Phase diagrams, Plagioclase, Plagioclase host, Pressure peak, Primary interest, Prograde, Prograde garnet, Prograde metamorphism, Prograde path, Pseudosection, Pseudosections, Quartz, Recrystallization, Reintegration, Relict, Rock composition, Rotzler, Solidus, Solidus temperature, Ternary, Ternary feldspar, Ternary feldspar grain, Ternary feldspar grains, Variscan, Vrana, Zircon, Zircon ages.
- Teeft :
- American mineralogist, Anorthite, Antiperthite, Antiperthite grains, Antiperthite inclusions, Assemblage, Biotite, Blackwell publishing, Bohemian, Bohemian massif, Carswell, Clinopyroxene, Compositional, Coronitic garnet, Crustal, Crystallization, Crystallization interval, Czech, Czech republic, Decompression, Earth sciences, Eclogites, Eld, Elkins grove, European journal, Exsolution, Facies, Feldspar, Felsic, Felsic matrix, Fiala, Fuhrman, Fuhrman lindsley, Garnet, Garnet growth, Garnet incl, Garnet proportion, Garnet zoning, Gfohl unit, Granulite, Granulite massifs, Granulites, Grossular, Grossular content, Growth zoning, High grossular content, High temperature, Holland powell, Hydrous, Igneous, Igneous crystallization, Igneous protolith, Inclusion, Isopleth, Jawecki, Kbar, Krone, Lamella, Lindsley, Lower austria, Lower pressure, Lower temperature, Magma, Magmatic, Magmatic rocks, Massif, Matrix, Metamorphic, Metamorphic conditions, Metamorphic geology, Metamorphic history, Metamorphic origin, Metamorphic peak, Metamorphic rocks, Metamorphism, Mineral assemblage, Mineral assemblages, Mineralogist, Moldanubian, Moldanubian granulites, Moldanubian zone, Muscovite, Orthopyroxene, Orthopyroxene granulites, Owen dostal, Peak pressure, Perthite, Petrakakis, Petrakakis jawecki, Petrology, Phase diagrams, Plagioclase, Plagioclase host, Pressure peak, Primary interest, Prograde, Prograde garnet, Prograde metamorphism, Prograde path, Pseudosection, Pseudosections, Quartz, Recrystallization, Reintegration, Relict, Rock composition, Rotzler, Solidus, Solidus temperature, Ternary, Ternary feldspar, Ternary feldspar grain, Ternary feldspar grains, Variscan, Vrana, Zircon, Zircon ages.
Abstract
The presence of ternary feldspar in high‐grade meta‐igneous rocks, and the recognition of the thermometric significance of this mineral, has led recent researchers to postulate peak metamorphic temperatures in excess of 1000 °C. However, it needs to be established that such ternary feldspar is not in fact a survivor of the original high‐temperature crystallization of the igneous protolith. After exsolution, the host and lamellae in the ternary feldspar grains may be stable throughout subsequent history as long as recrystallization does not occur. Such a history may involve rehydration and metamorphism, including H2O‐saturated conditions, with the compositions and proportions of the host and lamellae being modified to reflect the P–T conditions experienced. In the case of the high‐grade meta‐igneous rocks from the Moldanubian of the Bohemian Massif, some samples that contain ternary feldspar preserve a substantial measure of their igneous heritage. Orthopyroxene‐bearing granulites not only include types that are barely affected by the metamorphism, but also others that have undergone hydration of the igneous protolith prior to the development of a metamorphic overprint. A key to establishing the igneous origin of the ternary feldspar grains is their preservation in garnet that is either itself igneous, or of a relatively low‐temperature metamorphic origin. Applying the logic to the other ternary feldspar‐bearing meta‐igneous rocks deprives the Moldanubian of its ultrahigh temperature (UHT) metamorphic status.
Url:
DOI: 10.1111/j.1525-1314.2005.00600.x
Links to Exploration step
ISTEX:F4B40544EE12A675231304C46DFBA550E7020553Le document en format XML
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lindsley</term><term>Garnet</term><term>Garnet growth</term><term>Garnet incl</term><term>Garnet proportion</term><term>Garnet zoning</term><term>Gfohl unit</term><term>Granulite</term><term>Granulite massifs</term><term>Granulites</term><term>Grossular</term><term>Grossular content</term><term>Growth zoning</term><term>High grossular content</term><term>High temperature</term><term>Holland powell</term><term>Hydrous</term><term>Igneous</term><term>Igneous crystallization</term><term>Igneous protolith</term><term>Inclusion</term><term>Isopleth</term><term>Jawecki</term><term>Kbar</term><term>Krone</term><term>Lamella</term><term>Lindsley</term><term>Lower austria</term><term>Lower pressure</term><term>Lower temperature</term><term>Magma</term><term>Magmatic</term><term>Magmatic rocks</term><term>Massif</term><term>Matrix</term><term>Metamorphic</term><term>Metamorphic conditions</term><term>Metamorphic geology</term><term>Metamorphic history</term><term>Metamorphic 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temperature</term><term>Ternary</term><term>Ternary feldspar</term><term>Ternary feldspar grain</term><term>Ternary feldspar grains</term><term>Variscan</term><term>Vrana</term><term>Zircon</term><term>Zircon ages</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The presence of ternary feldspar in high‐grade meta‐igneous rocks, and the recognition of the thermometric significance of this mineral, has led recent researchers to postulate peak metamorphic temperatures in excess of 1000 °C. However, it needs to be established that such ternary feldspar is not in fact a survivor of the original high‐temperature crystallization of the igneous protolith. After exsolution, the host and lamellae in the ternary feldspar grains may be stable throughout subsequent history as long as recrystallization does not occur. Such a history may involve rehydration and metamorphism, including H2O‐saturated conditions, with the compositions and proportions of the host and lamellae being modified to reflect the P–T conditions experienced. In the case of the high‐grade meta‐igneous rocks from the Moldanubian of the Bohemian Massif, some samples that contain ternary feldspar preserve a substantial measure of their igneous heritage. Orthopyroxene‐bearing granulites not only include types that are barely affected by the metamorphism, but also others that have undergone hydration of the igneous protolith prior to the development of a metamorphic overprint. A key to establishing the igneous origin of the ternary feldspar grains is their preservation in garnet that is either itself igneous, or of a relatively low‐temperature metamorphic origin. Applying the logic to the other ternary feldspar‐bearing meta‐igneous rocks deprives the Moldanubian of its ultrahigh temperature (UHT) metamorphic status.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>feldspar</json:string><json:string>ternary</json:string><json:string>granulites</json:string><json:string>garnet</json:string><json:string>orthopyroxene</json:string><json:string>ternary feldspar</json:string><json:string>plagioclase</json:string><json:string>massif</json:string><json:string>granulite</json:string><json:string>metamorphism</json:string><json:string>solidus</json:string><json:string>biotite</json:string><json:string>metamorphic</json:string><json:string>kbar</json:string><json:string>prograde</json:string><json:string>pseudosection</json:string><json:string>antiperthite</json:string><json:string>moldanubian</json:string><json:string>pseudosections</json:string><json:string>blackwell publishing</json:string><json:string>bohemian massif</json:string><json:string>clinopyroxene</json:string><json:string>magmatic</json:string><json:string>petrology</json:string><json:string>exsolution</json:string><json:string>matrix</json:string><json:string>czech</json:string><json:string>metamorphic geology</json:string><json:string>grossular</json:string><json:string>mineral assemblages</json:string><json:string>carswell</json:string><json:string>petrakakis</json:string><json:string>felsic</json:string><json:string>zircon</json:string><json:string>fuhrman</json:string><json:string>lindsley</json:string><json:string>eld</json:string><json:string>lamella</json:string><json:string>magma</json:string><json:string>igneous</json:string><json:string>isopleth</json:string><json:string>garnet zoning</json:string><json:string>krone</json:string><json:string>bohemian</json:string><json:string>decompression</json:string><json:string>eclogites</json:string><json:string>reintegration</json:string><json:string>vrana</json:string><json:string>czech republic</json:string><json:string>anorthite</json:string><json:string>crustal</json:string><json:string>fiala</json:string><json:string>variscan</json:string><json:string>facies</json:string><json:string>fuhrman lindsley</json:string><json:string>mineralogist</json:string><json:string>prograde metamorphism</json:string><json:string>jawecki</json:string><json:string>rotzler</json:string><json:string>relict</json:string><json:string>quartz</json:string><json:string>petrakakis jawecki</json:string><json:string>muscovite</json:string><json:string>prograde path</json:string><json:string>recrystallization</json:string><json:string>perthite</json:string><json:string>mineral assemblage</json:string><json:string>american mineralogist</json:string><json:string>metamorphic conditions</json:string><json:string>antiperthite inclusions</json:string><json:string>ternary feldspar grains</json:string><json:string>moldanubian zone</json:string><json:string>assemblage</json:string><json:string>peak pressure</json:string><json:string>elkins grove</json:string><json:string>owen dostal</json:string><json:string>solidus temperature</json:string><json:string>earth sciences</json:string><json:string>holland powell</json:string><json:string>compositional</json:string><json:string>igneous crystallization</json:string><json:string>lower austria</json:string><json:string>lower temperature</json:string><json:string>ternary feldspar grain</json:string><json:string>metamorphic rocks</json:string><json:string>orthopyroxene granulites</json:string><json:string>garnet growth</json:string><json:string>lower pressure</json:string><json:string>high temperature</json:string><json:string>felsic matrix</json:string><json:string>metamorphic origin</json:string><json:string>european journal</json:string><json:string>growth zoning</json:string><json:string>gfohl unit</json:string><json:string>high grossular content</json:string><json:string>rock composition</json:string><json:string>igneous protolith</json:string><json:string>metamorphic peak</json:string><json:string>crystallization</json:string><json:string>inclusion</json:string><json:string>hydrous</json:string><json:string>pressure peak</json:string><json:string>antiperthite grains</json:string><json:string>primary interest</json:string><json:string>grossular content</json:string><json:string>coronitic garnet</json:string><json:string>prograde garnet</json:string><json:string>garnet proportion</json:string><json:string>magmatic rocks</json:string><json:string>granulite massifs</json:string><json:string>metamorphic history</json:string><json:string>crystallization interval</json:string><json:string>phase diagrams</json:string><json:string>garnet incl</json:string><json:string>plagioclase host</json:string><json:string>moldanubian granulites</json:string><json:string>zircon ages</json:string></teeft></keywords><author><json:item><name>P. ŠTÍPSKÁ</name><affiliations><json:string>Institute of Petrology and Structural Geology, Charles University, Albertov 6, 12843, Prague, Czech Republic (stipska@illite.u‐strasbg.fr)</json:string><json:string>Czech Geological Survey, Klárov 3, 118 21, Prague, Czech Republic</json:string><json:string>Centre de Géochimie de Surface, UMR CNRS 7516, 1 Rue Blessig, Strasbourg, France</json:string></affiliations></json:item><json:item><name>R. POWELL</name><affiliations><json:string>School of Earth Sciences, University of Melbourne, Victoria 3010, Australia</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Bohemian Massif</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>garnet zoning</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>orthopyroxene granulite</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>ternary feldspar</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>UHT metamorphism</value></json:item></subject><articleId><json:string>JMG600</json:string></articleId><arkIstex>ark:/67375/WNG-3QJZJMHG-0</arkIstex><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>The presence of ternary feldspar in high‐grade meta‐igneous rocks, and the recognition of the thermometric significance of this mineral, has led recent researchers to postulate peak metamorphic temperatures in excess of 1000 °C. However, it needs to be established that such ternary feldspar is not in fact a survivor of the original high‐temperature crystallization of the igneous protolith. After exsolution, the host and lamellae in the ternary feldspar grains may be stable throughout subsequent history as long as recrystallization does not occur. Such a history may involve rehydration and metamorphism, including H2O‐saturated conditions, with the compositions and proportions of the host and lamellae being modified to reflect the P–T conditions experienced. In the case of the high‐grade meta‐igneous rocks from the Moldanubian of the Bohemian Massif, some samples that contain ternary feldspar preserve a substantial measure of their igneous heritage. Orthopyroxene‐bearing granulites not only include types that are barely affected by the metamorphism, but also others that have undergone hydration of the igneous protolith prior to the development of a metamorphic overprint. A key to establishing the igneous origin of the ternary feldspar grains is their preservation in garnet that is either itself igneous, or of a relatively low‐temperature metamorphic origin. Applying the logic to the other ternary feldspar‐bearing meta‐igneous rocks deprives the Moldanubian of its ultrahigh temperature (UHT) metamorphic status.</abstract><qualityIndicators><score>9.64</score><pdfWordCount>10646</pdfWordCount><pdfCharCount>69072</pdfCharCount><pdfVersion>1.4</pdfVersion><pdfPageCount>21</pdfPageCount><pdfPageSize>595 x 782 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractWordCount>220</abstractWordCount><abstractCharCount>1533</abstractCharCount><keywordCount>5</keywordCount></qualityIndicators><title>Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif</title><genre><json:string>article</json:string></genre><host><title>Journal of Metamorphic Geology</title><language><json:string>unknown</json:string></language><doi><json:string>10.1111/(ISSN)1525-1314</json:string></doi><issn><json:string>0263-4929</json:string></issn><eissn><json:string>1525-1314</json:string></eissn><publisherId><json:string>JMG</json:string></publisherId><volume>23</volume><issue>8</issue><pages><first>627</first><last>647</last><total>21</total></pages><genre><json:string>journal</json:string></genre></host><namedEntities><unitex><date><json:string>2005</json:string></date><geogName></geogName><orgName><json:string>Grant Agency</json:string><json:string>Australia ABSTRACT The</json:string><json:string>Charles University</json:string><json:string>Ministry of Education</json:string><json:string>Czech National Grant Agency</json:string><json:string>Blackwell Publishing Ltd</json:string><json:string>University of Melbourne</json:string><json:string>Czech Academy of Sciences</json:string></orgName><orgName_funder></orgName_funder><orgName_provider></orgName_provider><persName><json:string>E. Essene</json:string><json:string>Jan Franek</json:string><json:string>The</json:string><json:string>O. Lexa</json:string><json:string>P. O’Brien</json:string><json:string>V. Bohmova</json:string><json:string>P. Pitra</json:string></persName><placeName><json:string>Poland</json:string><json:string>Austria</json:string><json:string>Prague</json:string><json:string>Europe</json:string><json:string>Strasbourg</json:string><json:string>Czech Republic</json:string><json:string>France</json:string><json:string>Lower Austria</json:string><json:string>Zurich</json:string></placeName><ref_url></ref_url><ref_bibl><json:string>Kryza et al., 1996</json:string><json:string>Pattison & Begin, 1994</json:string><json:string>van Breemen et al., 1982</json:string><json:string>from Fuhrman & Lindsley, 1988</json:string><json:string>Medaris et al., 1998</json:string><json:string>Benisek et al., 2003</json:string><json:string>Hokada, 2001</json:string><json:string>Harley, 1998</json:string><json:string>O’Brien & Vrana, 1995</json:string><json:string>Seck, 1971a,b</json:string><json:string>modified after Franke, 2000</json:string><json:string>Petrakakis (1997)</json:string><json:string>Cooke et al., 2000</json:string><json:string>Friedl et al.</json:string><json:string>Fiala et al., 1987</json:string><json:string>Cooke & O’Brien, 2001</json:string><json:string>Schwandt et al., 1996</json:string><json:string>Wen & Nekvasil, 1994</json:string><json:string>Fitzsimmons & Harley, 1994</json:string><json:string>Aftalion et al., 1989</json:string><json:string>Fuhrman & Lindsley, 1988</json:string><json:string>see Bohlen & Essene, 1977</json:string><json:string>Stı´ pska & Powell, 2005</json:string><json:string>Kroner et al., 2000</json:string><json:string>Petrakakis, 1997</json:string><json:string>Rubie, 1990</json:string><json:string>Ellis et al., 1980</json:string><json:string>Owen & Dostal, 1996</json:string><json:string>White & Powell, 2002</json:string><json:string>Carswell & O’Brien, 1993</json:string><json:string>Powell et al. (2005)</json:string><json:string>Benisek et al. (2003)</json:string><json:string>Whitney, 1991</json:string><json:string>Kroner et al.</json:string><json:string>Petrakakis & Jawecki, 1995</json:string><json:string>Vrana & Jakesˇ , 1982</json:string><json:string>Guiraud et al., 2001</json:string><json:string>Brien et al., 1997</json:string><json:string>Friedl et al., 2004</json:string><json:string>Wendt et al., 1994</json:string><json:string>Sandiford & Powell, 1986</json:string><json:string>Medaris et al., 1995, 1998</json:string><json:string>Cooke, 2000</json:string><json:string>Kelsey et al., 2004</json:string><json:string>Snoeyenbos et al., 1995</json:string><json:string>Klemd & Brocker, 1999</json:string><json:string>Brown, 2002</json:string><json:string>Schulmann et al., 2005</json:string><json:string>Fiala et al. (1987)</json:string><json:string>Hayob et al. (1989)</json:string><json:string>Chakraborty & Ganguly, 1991</json:string><json:string>Elkins & Grove, 1990</json:string><json:string>Tracy, 1982</json:string><json:string>O’Brien, 1997a,b</json:string></ref_bibl><bibl></bibl></unitex></namedEntities><ark><json:string>ark:/67375/WNG-3QJZJMHG-0</json:string></ark><categories><wos><json:string>1 - science</json:string><json:string>2 - geology</json:string></wos><scienceMetrix><json:string>1 - natural sciences</json:string><json:string>2 - earth & environmental sciences</json:string><json:string>3 - geochemistry & geophysics</json:string></scienceMetrix><scopus><json:string>1 - Physical Sciences</json:string><json:string>2 - Earth and Planetary Sciences</json:string><json:string>3 - Geochemistry and Petrology</json:string><json:string>1 - Physical Sciences</json:string><json:string>2 - Earth and Planetary Sciences</json:string><json:string>3 - Geology</json:string></scopus><inist><json:string>1 - sciences appliquees, technologies et medecines</json:string><json:string>2 - sciences exactes et technologie</json:string><json:string>3 - terre, ocean, espace</json:string><json:string>4 - sciences de la terre</json:string></inist></categories><publicationDate>2005</publicationDate><copyrightDate>2005</copyrightDate><doi><json:string>10.1111/j.1525-1314.2005.00600.x</json:string></doi><id>F4B40544EE12A675231304C46DFBA550E7020553</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/F4B40544EE12A675231304C46DFBA550E7020553/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/F4B40544EE12A675231304C46DFBA550E7020553/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/F4B40544EE12A675231304C46DFBA550E7020553/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main">Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Science Inc</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2005-10"></date></publicationStmt><notesStmt><note type="content-type" subtype="article" source="article" scheme="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</note><note type="publication-type" subtype="journal" scheme="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</note></notesStmt><sourceDesc><biblStruct type="article"><analytic><title level="a" type="main">Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif</title><title level="a" type="short">TERNARY FELDSPAR IN GRANULITES</title><author xml:id="author-0000"><persName><forename type="first">P.</forename><surname>ŠTÍPSKÁ</surname></persName><affiliation>
Institute of Petrology and Structural Geology, Charles University, Albertov 6, 12843, Prague, Czech Republic ()<address><country key="CZ"></country></address></affiliation><affiliation>Czech Geological Survey, Klárov 3, 118 21, Prague, Czech Republic<address><country key="CZ"></country></address></affiliation><affiliation>Centre de Géochimie de Surface, UMR CNRS 7516, 1 Rue Blessig, Strasbourg, France<address><country key="FR"></country></address></affiliation></author><author xml:id="author-0001"><persName><forename type="first">R.</forename><surname>POWELL</surname></persName><affiliation>School of Earth Sciences, University of Melbourne, Victoria 3010, Australia<address><country key="AU"></country></address></affiliation></author><idno type="istex">F4B40544EE12A675231304C46DFBA550E7020553</idno><idno type="ark">ark:/67375/WNG-3QJZJMHG-0</idno><idno type="DOI">10.1111/j.1525-1314.2005.00600.x</idno><idno type="unit">JMG600</idno><idno type="toTypesetVersion">file:JMG.JMG600.pdf</idno></analytic><monogr><title level="j" type="main">Journal of Metamorphic Geology</title><title level="j" type="alt">JOURNAL OF METAMORPHIC GEOLOGY</title><idno type="pISSN">0263-4929</idno><idno type="eISSN">1525-1314</idno><idno type="book-DOI">10.1111/(ISSN)1525-1314</idno><idno type="book-part-DOI">10.1111/jmg.2005.23.issue-8</idno><idno type="product">JMG</idno><idno type="publisherDivision">ST</idno><imprint><biblScope unit="vol">23</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page" from="627">627</biblScope><biblScope unit="page" to="647">647</biblScope><biblScope unit="page-count">21</biblScope><publisher>Blackwell Science Inc</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2005-10"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract xml:lang="en" style="main"><head>Abstract</head><p>The presence of ternary feldspar in high‐grade meta‐igneous rocks, and the recognition of the thermometric significance of this mineral, has led recent researchers to postulate peak metamorphic temperatures in excess of 1000 °C. However, it needs to be established that such ternary feldspar is not in fact a survivor of the original high‐temperature crystallization of the igneous protolith. After exsolution, the host and lamellae in the ternary feldspar grains may be stable throughout subsequent history as long as recrystallization does not occur. Such a history may involve rehydration and metamorphism, including H<hi rend="subscript">2</hi>O‐saturated conditions, with the compositions and proportions of the host and lamellae being modified to reflect the <hi rend="italic">P</hi>–<hi rend="italic">T</hi> conditions experienced. In the case of the high‐grade meta‐igneous rocks from the Moldanubian of the Bohemian Massif, some samples that contain ternary feldspar preserve a substantial measure of their igneous heritage. Orthopyroxene‐bearing granulites not only include types that are barely affected by the metamorphism, but also others that have undergone hydration of the igneous protolith prior to the development of a metamorphic overprint. A key to establishing the igneous origin of the ternary feldspar grains is their preservation in garnet that is either itself igneous, or of a relatively low‐temperature metamorphic origin. Applying the logic to the other ternary feldspar‐bearing meta‐igneous rocks deprives the Moldanubian of its ultrahigh temperature (UHT) metamorphic status.</p></abstract><textClass><keywords xml:lang="en"><term xml:id="k1">Bohemian Massif</term><term xml:id="k2">garnet zoning</term><term xml:id="k3">orthopyroxene granulite</term><term xml:id="k4">ternary feldspar</term><term xml:id="k5">UHT metamorphism</term></keywords><keywords rend="tocHeading1"><term>Original Articles</term></keywords></textClass><langUsage><language ident="en"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/F4B40544EE12A675231304C46DFBA550E7020553/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Science Inc</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1525-1314</doi><issn type="print">0263-4929</issn><issn type="electronic">1525-1314</issn><idGroup><id type="product" value="JMG"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="JOURNAL OF METAMORPHIC GEOLOGY">Journal of Metamorphic Geology</title></titleGroup></publicationMeta><publicationMeta level="part" position="10008"><doi origin="wiley">10.1111/jmg.2005.23.issue-8</doi><numberingGroup><numbering type="journalVolume" number="23">23</numbering><numbering type="journalIssue" number="8">8</numbering></numberingGroup><coverDate startDate="2005-10">October 2005</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="1" status="forIssue"><doi origin="wiley">10.1111/j.1525-1314.2005.00600.x</doi><idGroup><id type="unit" value="JMG600"></id></idGroup><countGroup><count type="pageTotal" number="21"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><eventGroup><event type="firstOnline" date="2005-09-27"></event><event type="publishedOnlineFinalForm" date="2005-09-27"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.4 mode:FullText source:FullText result:FullText" date="2010-03-29"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-31"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="627">627</numbering><numbering type="pageLast" number="647">647</numbering></numberingGroup><linkGroup><link type="toTypesetVersion" href="file:JMG.JMG600.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received 22 November 2005; revision accepted 30 June 2005.</unparsedEditorialHistory><countGroup><count type="figureTotal" number="14"></count><count type="tableTotal" number="2"></count></countGroup><titleGroup><title type="main">Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif</title><title type="shortAuthors">P. ŠTÍPSKÁ & R. POWELL</title><title type="short">TERNARY FELDSPAR IN GRANULITES</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1 #a2 #a3"><personName><givenNames>P.</givenNames><familyName>ŠTÍPSKÁ</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a4"><personName><givenNames>R.</givenNames><familyName>POWELL</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="CZ"><unparsedAffiliation>
Institute of Petrology and Structural Geology, Charles University, Albertov 6, 12843, Prague, Czech Republic (<email normalForm="stipska@illite.u-strasbg.fr">stipska@illite.u‐strasbg.fr</email>)</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="CZ"><unparsedAffiliation>Czech Geological Survey, Klárov 3, 118 21, Prague, Czech Republic</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="FR"><unparsedAffiliation>Centre de Géochimie de Surface, UMR CNRS 7516, 1 Rue Blessig, Strasbourg, France</unparsedAffiliation></affiliation><affiliation xml:id="a4" countryCode="AU"><unparsedAffiliation>School of Earth Sciences, University of Melbourne, Victoria 3010, Australia</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1">Bohemian Massif</keyword><keyword xml:id="k2">garnet zoning</keyword><keyword xml:id="k3">orthopyroxene granulite</keyword><keyword xml:id="k4">ternary feldspar</keyword><keyword xml:id="k5">UHT metamorphism</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>The presence of ternary feldspar in high‐grade meta‐igneous rocks, and the recognition of the thermometric significance of this mineral, has led recent researchers to postulate peak metamorphic temperatures in excess of 1000 °C. However, it needs to be established that such ternary feldspar is not in fact a survivor of the original high‐temperature crystallization of the igneous protolith. After exsolution, the host and lamellae in the ternary feldspar grains may be stable throughout subsequent history as long as recrystallization does not occur. Such a history may involve rehydration and metamorphism, including H<sub>2</sub>O‐saturated conditions, with the compositions and proportions of the host and lamellae being modified to reflect the <i>P</i>–<i>T</i> conditions experienced. In the case of the high‐grade meta‐igneous rocks from the Moldanubian of the Bohemian Massif, some samples that contain ternary feldspar preserve a substantial measure of their igneous heritage. Orthopyroxene‐bearing granulites not only include types that are barely affected by the metamorphism, but also others that have undergone hydration of the igneous protolith prior to the development of a metamorphic overprint. A key to establishing the igneous origin of the ternary feldspar grains is their preservation in garnet that is either itself igneous, or of a relatively low‐temperature metamorphic origin. Applying the logic to the other ternary feldspar‐bearing meta‐igneous rocks deprives the Moldanubian of its ultrahigh temperature (UHT) metamorphic status.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>TERNARY FELDSPAR IN GRANULITES</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Does ternary feldspar constrain the metamorphic conditions of high‐grade meta‐igneous rocks? Evidence from orthopyroxene granulites, Bohemian Massif</title></titleInfo><name type="personal"><namePart type="given">P.</namePart><namePart type="family">ŠTÍPSKÁ</namePart><affiliation>Institute of Petrology and Structural Geology, Charles University, Albertov 6, 12843, Prague, Czech Republic (stipska@illite.u‐strasbg.fr)</affiliation><affiliation>Czech Geological Survey, Klárov 3, 118 21, Prague, Czech Republic</affiliation><affiliation>Centre de Géochimie de Surface, UMR CNRS 7516, 1 Rue Blessig, Strasbourg, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">POWELL</namePart><affiliation>School of Earth Sciences, University of Melbourne, Victoria 3010, Australia</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</genre><originInfo><publisher>Blackwell Science Inc</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2005-10</dateIssued><edition>Received 22 November 2005; revision accepted 30 June 2005.</edition><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><extent unit="figures">14</extent><extent unit="tables">2</extent></physicalDescription><abstract lang="en">The presence of ternary feldspar in high‐grade meta‐igneous rocks, and the recognition of the thermometric significance of this mineral, has led recent researchers to postulate peak metamorphic temperatures in excess of 1000 °C. However, it needs to be established that such ternary feldspar is not in fact a survivor of the original high‐temperature crystallization of the igneous protolith. After exsolution, the host and lamellae in the ternary feldspar grains may be stable throughout subsequent history as long as recrystallization does not occur. Such a history may involve rehydration and metamorphism, including H2O‐saturated conditions, with the compositions and proportions of the host and lamellae being modified to reflect the P–T conditions experienced. In the case of the high‐grade meta‐igneous rocks from the Moldanubian of the Bohemian Massif, some samples that contain ternary feldspar preserve a substantial measure of their igneous heritage. Orthopyroxene‐bearing granulites not only include types that are barely affected by the metamorphism, but also others that have undergone hydration of the igneous protolith prior to the development of a metamorphic overprint. A key to establishing the igneous origin of the ternary feldspar grains is their preservation in garnet that is either itself igneous, or of a relatively low‐temperature metamorphic origin. Applying the logic to the other ternary feldspar‐bearing meta‐igneous rocks deprives the Moldanubian of its ultrahigh temperature (UHT) metamorphic status.</abstract><subject lang="en"><genre>keywords</genre><topic>Bohemian Massif</topic><topic>garnet zoning</topic><topic>orthopyroxene granulite</topic><topic>ternary feldspar</topic><topic>UHT metamorphism</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Metamorphic Geology</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><identifier type="ISSN">0263-4929</identifier><identifier type="eISSN">1525-1314</identifier><identifier type="DOI">10.1111/(ISSN)1525-1314</identifier><identifier type="PublisherID">JMG</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>23</number></detail><detail type="issue"><caption>no.</caption><number>8</number></detail><extent unit="pages"><start>627</start><end>647</end><total>21</total></extent></part></relatedItem><identifier type="istex">F4B40544EE12A675231304C46DFBA550E7020553</identifier><identifier type="ark">ark:/67375/WNG-3QJZJMHG-0</identifier><identifier type="DOI">10.1111/j.1525-1314.2005.00600.x</identifier><identifier type="ArticleID">JMG600</identifier><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-L0C46X92-X">wiley</recordContentSource><recordOrigin>Blackwell Science Inc</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/F4B40544EE12A675231304C46DFBA550E7020553/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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