The Pliocene volcanic rocks of Crommyonia, western Greece and their implications for the early evolution of the South Aegean arc
Identifieur interne : 000104 ( Istex/Corpus ); précédent : 000103; suivant : 000105The Pliocene volcanic rocks of Crommyonia, western Greece and their implications for the early evolution of the South Aegean arc
Auteurs : Georgia Pe-Piper ; K. HatzipanagiotouSource :
- Geological Magazine [ 0016-7568 ] ; 1997-01.
Abstract
Minor Pliocene dacites from Crommyonia mark the western end of the South Aegean volcanic arc. They form small lava domes and flows generally associated with extensional faults. An older group (3.6–4 Ma) occurs in the west and a younger group (2.3–2.8 Ma) in the east. Volcanic rocks of similar age are found at Aegina, Poros and Milos in the western part of the South Aegean arc, whereas volcanism in the eastern part of the arc is of Quaternary age. The two groups of rocks at Crommyonia are chemically distinct. Both groups contain multiple generations of plagioclase. Both have εNd (−8.0 to −10.6) that is much more negative than any other rocks in the South Aegean arc and model ages that are similar to those for many Miocene extensional granites of the Cyclades. The model ages are interpreted to reflect a mid-Proterozoic mantle event recognized elsewhere in the Hellenides. The Crommyonia dacitic magmas represent the first stages of melting of deep lithosphere as a result of both subduction-related hydrous fluids and extensional decompression. Plagioclase compositions suggest important magma evolution in a base-of-crust magma chamber, where the strong crustal Nd isotope signature was acquired. With time, asthenospheric sources that upwelled as a result of extension played an increasingly important role in determining the isotopic characteristics of the arc volcanism.
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Hatzipanagiotou</name><affiliation><mods:affiliation>Department of Geology, University of Patras, Patras, Greece</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:CAAAA5A9692B745F0613B735BA4B7BD833C940E6</idno><date when="1997" year="1997">1997</date><idno type="url">https://api.istex.fr/document/CAAAA5A9692B745F0613B735BA4B7BD833C940E6/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000104</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000104</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">The Pliocene volcanic rocks of Crommyonia, western Greece and their implications for the early evolution of the South Aegean arc</title><author><name sortKey="Pe Piper, Georgia" sort="Pe Piper, Georgia" uniqKey="Pe Piper G" first="Georgia" last="Pe-Piper">Georgia Pe-Piper</name><affiliation><mods:affiliation>Department of Geology, Saint Mary's University, Halifax, N.S., B3H 3C3, Canada</mods:affiliation></affiliation></author><author><name sortKey="Hatzipanagiotou, K" sort="Hatzipanagiotou, K" uniqKey="Hatzipanagiotou K" first="K." last="Hatzipanagiotou">K. Hatzipanagiotou</name><affiliation><mods:affiliation>Department of Geology, University of Patras, Patras, Greece</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Geological Magazine</title><idno type="ISSN">0016-7568</idno><idno type="eISSN">1469-5081</idno><imprint><publisher>Cambridge University Press</publisher><date type="published" when="1997-01">1997-01</date><biblScope unit="volume">134</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="55">55</biblScope><biblScope unit="page" to="66">66</biblScope></imprint><idno type="ISSN">0016-7568</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0016-7568</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Minor Pliocene dacites from Crommyonia mark the western end of the South Aegean volcanic arc. They form small lava domes and flows generally associated with extensional faults. An older group (3.6–4 Ma) occurs in the west and a younger group (2.3–2.8 Ma) in the east. Volcanic rocks of similar age are found at Aegina, Poros and Milos in the western part of the South Aegean arc, whereas volcanism in the eastern part of the arc is of Quaternary age. The two groups of rocks at Crommyonia are chemically distinct. Both groups contain multiple generations of plagioclase. Both have εNd (−8.0 to −10.6) that is much more negative than any other rocks in the South Aegean arc and model ages that are similar to those for many Miocene extensional granites of the Cyclades. The model ages are interpreted to reflect a mid-Proterozoic mantle event recognized elsewhere in the Hellenides. The Crommyonia dacitic magmas represent the first stages of melting of deep lithosphere as a result of both subduction-related hydrous fluids and extensional decompression. Plagioclase compositions suggest important magma evolution in a base-of-crust magma chamber, where the strong crustal Nd isotope signature was acquired. With time, asthenospheric sources that upwelled as a result of extension played an increasingly important role in determining the isotopic characteristics of the arc volcanism.</div></front></TEI><istex><corpusName>cambridge</corpusName><author><json:item><name>GEORGIA PE-PIPER</name><affiliations><json:string>Department of Geology, Saint Mary's University, Halifax, N.S., B3H 3C3, Canada</json:string></affiliations></json:item><json:item><name>K. 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Plagioclase compositions suggest important magma evolution in a base-of-crust magma chamber, where the strong crustal Nd isotope signature was acquired. With time, asthenospheric sources that upwelled as a result of extension played an increasingly important role in determining the isotopic characteristics of the arc volcanism.</p></abstract></profileDesc><revisionDesc><change when="1997-01-01">Created</change><change when="1997-01">Published</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2017-09-5">References added</change></revisionDesc></teiHeader></istex:fulltextTEI></fulltext><metadata><istex:metadataXml wicri:clean="corpus cambridge not found" wicri:toSee="no header"><istex:xmlDeclaration>version='1.0' encoding='UTF-8'</istex:xmlDeclaration><istex:docType PUBLIC="-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.0 20120330//EN" URI="JATS-journalpublishing1.dtd" name="istex:docType"></istex:docType><istex:document><article dtd-version="1.0" article-type="research-article"><front><journal-meta><journal-id journal-id-type="publisher-id">GEO</journal-id><journal-title-group><journal-title>Geological Magazine</journal-title><abbrev-journal-title>Geol. Mag.</abbrev-journal-title></journal-title-group><issn pub-type="epub">1469-5081</issn><issn pub-type="ppub">0016-7568</issn><publisher><publisher-name>Cambridge University Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="pii">S0016756897006390</article-id><title-group><article-title>The Pliocene volcanic rocks of Crommyonia, western Greece and
their implications for the early evolution of the South Aegean
arc</article-title></title-group><contrib-group><contrib><name><surname>PE-PIPER</surname><given-names>GEORGIA</given-names></name><aff>Department of Geology, <institution>Saint Mary's
University</institution>, Halifax, N.S., B3H 3C3, <country>Canada</country></aff></contrib><contrib><name><surname>HATZIPANAGIOTOU</surname><given-names>K.</given-names></name><aff>Department of Geology, <institution>University of
Patras</institution>, Patras, <country>Greece</country></aff></contrib></contrib-group><pub-date pub-type="epub"><day>1</day><month>1</month><year>1997</year></pub-date><pub-date pub-type="ppub"><month>1</month><year>1997</year></pub-date><volume>134</volume><issue>1</issue><fpage>55</fpage><lpage>66</lpage><history><date date-type="accepted"><day>20</day><month>6</month><year>1996</year></date><date date-type="received"><day>26</day><month>3</month><year>1996</year></date></history><permissions><copyright-statement>© 1997 Cambridge University Press</copyright-statement></permissions><abstract><p>Minor Pliocene dacites from Crommyonia mark the western end
of the South Aegean volcanic arc. They form small lava domes and
flows generally associated with extensional faults. An older group
(3.6–4 Ma) occurs in the west and a younger group
(2.3–2.8 Ma) in the east. Volcanic rocks of similar age are
found at Aegina, Poros and Milos in the western part of the South
Aegean arc, whereas volcanism in the eastern part of the arc is of
Quaternary age. The two groups of rocks at Crommyonia are chemically
distinct. Both groups contain multiple generations of plagioclase.
Both have ε<sub>Nd</sub> (−8.0 to −10.6) that is
much more negative than any other rocks in the South Aegean arc and
model ages that are similar to those for many Miocene extensional
granites of the Cyclades. The model ages are interpreted to reflect a
mid-Proterozoic mantle event recognized elsewhere in the Hellenides.
The Crommyonia dacitic magmas represent the first stages of melting
of deep lithosphere as a result of both subduction-related hydrous
fluids and extensional decompression. Plagioclase compositions
suggest important magma evolution in a base-of-crust magma chamber,
where the strong crustal Nd isotope signature was acquired. With
time, asthenospheric sources that upwelled as a result of extension
played an increasingly important role in determining the isotopic
characteristics of the arc volcanism.</p></abstract><counts><page-count count="12"></page-count></counts><custom-meta-group><custom-meta><meta-name>pdf</meta-name><meta-value>S0016756897006390a.pdf</meta-value></custom-meta></custom-meta-group></article-meta></front></article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>The Pliocene volcanic rocks of Crommyonia, western Greece and their implications for the early evolution of the South Aegean arc</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>The Pliocene volcanic rocks of Crommyonia, western Greece and their implications for the early evolution of the South Aegean arc</title></titleInfo><name type="personal"><namePart type="given">GEORGIA</namePart><namePart type="family">PE-PIPER</namePart><affiliation>Department of Geology, Saint Mary's University, Halifax, N.S., B3H 3C3, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K.</namePart><namePart type="family">HATZIPANAGIOTOU</namePart><affiliation>Department of Geology, University of Patras, Patras, Greece</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="research-article" authority="ISTEX" authorityURI="https://content-type.data.istex.fr" valueURI="https://content-type.data.istex.fr/ark:/67375/XTP-1JC4F85T-7">research-article</genre><originInfo><publisher>Cambridge University Press</publisher><dateIssued encoding="w3cdtf">1997-01</dateIssued><dateCreated encoding="w3cdtf">1997-01-01</dateCreated><copyrightDate encoding="w3cdtf">1997</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><abstract>Minor Pliocene dacites from Crommyonia mark the western end of the South Aegean volcanic arc. They form small lava domes and flows generally associated with extensional faults. An older group (3.6–4 Ma) occurs in the west and a younger group (2.3–2.8 Ma) in the east. Volcanic rocks of similar age are found at Aegina, Poros and Milos in the western part of the South Aegean arc, whereas volcanism in the eastern part of the arc is of Quaternary age. The two groups of rocks at Crommyonia are chemically distinct. Both groups contain multiple generations of plagioclase. Both have εNd (−8.0 to −10.6) that is much more negative than any other rocks in the South Aegean arc and model ages that are similar to those for many Miocene extensional granites of the Cyclades. The model ages are interpreted to reflect a mid-Proterozoic mantle event recognized elsewhere in the Hellenides. The Crommyonia dacitic magmas represent the first stages of melting of deep lithosphere as a result of both subduction-related hydrous fluids and extensional decompression. Plagioclase compositions suggest important magma evolution in a base-of-crust magma chamber, where the strong crustal Nd isotope signature was acquired. With time, asthenospheric sources that upwelled as a result of extension played an increasingly important role in determining the isotopic characteristics of the arc volcanism.</abstract><relatedItem type="host"><titleInfo><title>Geological Magazine</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">0016-7568</identifier><identifier type="eISSN">1469-5081</identifier><identifier type="PublisherID">GEO</identifier><part><date>1997</date><detail type="volume"><caption>vol.</caption><number>134</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>55</start><end>66</end><total>12</total></extent></part></relatedItem><identifier type="istex">CAAAA5A9692B745F0613B735BA4B7BD833C940E6</identifier><identifier type="ark">ark:/67375/6GQ-3JL98G33-L</identifier><identifier type="PII">S0016756897006390</identifier><accessCondition type="use and reproduction" contentType="copyright">© 1997 Cambridge University Press</accessCondition><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-G3RCRD03-V">cambridge</recordContentSource><recordOrigin>© 1997 Cambridge University Press</recordOrigin></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/CAAAA5A9692B745F0613B735BA4B7BD833C940E6/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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