NissirosV1, Main, Exploration, bibRecord, 000350

Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension

Identifieur interne : 000350 ( Main/Exploration ); précédent : 000349; suivant : 000351

Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension

Auteurs : Georgia Pe-Piper [Canada] ; David J. W. Piper [Canada]

Source :

Lithos [ 0024-4937 ] ; 1994.

RBID : ISTEX:A0FE82A1D8D44140075738A292C0057A63F20130

Descripteurs français

Wicri :
- topic : Essence.

English descriptors

KwdEn :
- Adakites, Amphibole, Andesite, Aphyric, Aphyric dacite, Biotite, Boninite, Boninites, Bronzite, Bronzite phenocrysts, Clast, Clinopyroxene, Contrib, Crust, Crystallisation, Dacite, Defant, Early miocene, Earth planet, Evia, Felsic, Felsic pyroclastic rocks, Fractional crystallisation, Geol, Groundmass, High temperatures, Hornblende, Igneous rocks, Isotope, Isotopic composition, Lacustrine, Lava, Lett, Limited extent, Magma, Magnesian, Magnesian andesites, Middle miocene, Mineral chemistry, Miocene, Northern greece, Oceanic, Opaque rims, Orion, Orthopyroxene, Oxylithos, Oxylithos andesite, Oxylithos andesites, Oxylithos rocks, Oxylithos volcanics, Petrol, Phenocrysts, Phlogopite, Piper, Plagioclase, Plagioclase phenocrysts, Porphyritic, Porphyritic dacite, Pyroclastic, Pyroxene, Quartz, Rhyolite, Sio2, Subducted, Subducted slab, Subduction, Tatsumi, Trace elements, Unwin hyman, Volcanic rocks, Volcanism, Western aegean, Xenolith.
Teeft :
- Adakites, Amphibole, Andesite, Aphyric, Aphyric dacite, Biotite, Boninite, Boninites, Bronzite, Bronzite phenocrysts, Clast, Clinopyroxene, Contrib, Crust, Crystallisation, Dacite, Defant, Early miocene, Earth planet, Evia, Felsic, Felsic pyroclastic rocks, Fractional crystallisation, Geol, Groundmass, High temperatures, Hornblende, Igneous rocks, Isotope, Isotopic composition, Lacustrine, Lava, Lett, Limited extent, Magma, Magnesian, Magnesian andesites, Middle miocene, Mineral chemistry, Miocene, Northern greece, Oceanic, Opaque rims, Orion, Orthopyroxene, Oxylithos, Oxylithos andesite, Oxylithos andesites, Oxylithos rocks, Oxylithos volcanics, Petrol, Phenocrysts, Phlogopite, Piper, Plagioclase, Plagioclase phenocrysts, Porphyritic, Porphyritic dacite, Pyroclastic, Pyroxene, Quartz, Rhyolite, Sio2, Subducted, Subducted slab, Subduction, Tatsumi, Trace elements, Unwin hyman, Volcanic rocks, Volcanism, Western aegean, Xenolith.

Abstract

Abstract: Mid-Miocene volcanic rocks are rare in the Aegean region, although early Miocene and late Miocene-Quaternary volcanism is widespread. At Oxylithos (island of Evia), 14 Ma dacites form a dome or sub-volcanic complex. Phreatomagmatic eruptions formed nearby rhyolitic pyroclastic surge deposits. The calc-alkaline dacites contain bronzite, Mg-rich clinopyroxene, phlogopite and plagioclase phenocrysts. The magma results from mixing of a Mg-rich andesitic magma, similar to that in the nearby island of Skyros, with more felsic magmas represented by the rhyolitic pyroclastics. The dacites are geochemically similar to adakites, which are derived by partial melting of eclogitic subducted oceanic crust and have low Y and Yb and high SrY ratio. 87Sr86Sr≈0.7095 is found in both dacite and rhyolite. Lead isotopic composition from the high-Mg andesite from Skyros, with 207Pb204Pb= 15.70 and 208Pb204Pb= 38.90, forms a linear trend with Evia dacite and rhyolite with 207Pb204Pb= 15.71 and 208Pb204Pb= 39.05. The high temperatures required to produce such magma resulted from decompression due to extension of the Aegean basin at the same time as the initial intrusion of the detached subducted slab in the western Aegean that has been imaged by seismic tomography. The Oxylithos rocks extend the known occurrences of adakite series rocks: this series is not restricted to sites with subduction of young oceanic crust.

Url:

https://api.istex.fr/document/A0FE82A1D8D44140075738A292C0057A63F20130/fulltext/pdf

DOI: 10.1016/0024-4937(94)90004-3

Affiliations:

Canada

Links toward previous steps (curation, corpus...)

to stream Istex, to step Corpus: 000334
to stream Istex, to step Curation: 000334
to stream Istex, to step Checkpoint: 000286
to stream Main, to step Merge: 000360
to stream Main, to step Curation: 000350

Le document en format XML

<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension</title>
<author><name sortKey="Pe Piper, Georgia" sort="Pe Piper, Georgia" uniqKey="Pe Piper G" first="Georgia" last="Pe-Piper">Georgia Pe-Piper</name>
</author>
<author><name sortKey="Piper, David J W" sort="Piper, David J W" uniqKey="Piper D" first="David J. W." last="Piper">David J. W. Piper</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:A0FE82A1D8D44140075738A292C0057A63F20130</idno>
<date when="1994" year="1994">1994</date>
<idno type="doi">10.1016/0024-4937(94)90004-3</idno>
<idno type="url">https://api.istex.fr/document/A0FE82A1D8D44140075738A292C0057A63F20130/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">000334</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000334</idno>
<idno type="wicri:Area/Istex/Curation">000334</idno>
<idno type="wicri:Area/Istex/Checkpoint">000286</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000286</idno>
<idno type="wicri:doubleKey">0024-4937:1994:Pe Piper G:miocene:magnesian:andesites</idno>
<idno type="wicri:Area/Main/Merge">000360</idno>
<idno type="wicri:Area/Main/Curation">000350</idno>
<idno type="wicri:Area/Main/Exploration">000350</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a">Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension</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 wicri:level="1"><country xml:lang="fr">Canada</country>
<wicri:regionArea>Department of Geology, Saint Mary's University, Halifax, N.S. B3H 3C3</wicri:regionArea>
<wicri:noRegion>N.S. B3H 3C3</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Piper, David J W" sort="Piper, David J W" uniqKey="Piper D" first="David J. W." last="Piper">David J. W. Piper</name>
<affiliation wicri:level="1"><country xml:lang="fr">Canada</country>
<wicri:regionArea>Atlantic Geoscience Centre, Geological Survey of Canada, Bedford Institute of Oceanography, P.O. Box 1006, Dartmouth, N.S. B2Y 4A2</wicri:regionArea>
<wicri:noRegion>N.S. B2Y 4A2</wicri:noRegion>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Lithos</title>
<title level="j" type="abbrev">LITHOS</title>
<idno type="ISSN">0024-4937</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="1994">1994</date>
<biblScope unit="volume">31</biblScope>
<biblScope unit="issue">3–4</biblScope>
<biblScope unit="page" from="125">125</biblScope>
<biblScope unit="page" to="140">140</biblScope>
</imprint>
<idno type="ISSN">0024-4937</idno>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0024-4937</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adakites</term>
<term>Amphibole</term>
<term>Andesite</term>
<term>Aphyric</term>
<term>Aphyric dacite</term>
<term>Biotite</term>
<term>Boninite</term>
<term>Boninites</term>
<term>Bronzite</term>
<term>Bronzite phenocrysts</term>
<term>Clast</term>
<term>Clinopyroxene</term>
<term>Contrib</term>
<term>Crust</term>
<term>Crystallisation</term>
<term>Dacite</term>
<term>Defant</term>
<term>Early miocene</term>
<term>Earth planet</term>
<term>Evia</term>
<term>Felsic</term>
<term>Felsic pyroclastic rocks</term>
<term>Fractional crystallisation</term>
<term>Geol</term>
<term>Groundmass</term>
<term>High temperatures</term>
<term>Hornblende</term>
<term>Igneous rocks</term>
<term>Isotope</term>
<term>Isotopic composition</term>
<term>Lacustrine</term>
<term>Lava</term>
<term>Lett</term>
<term>Limited extent</term>
<term>Magma</term>
<term>Magnesian</term>
<term>Magnesian andesites</term>
<term>Middle miocene</term>
<term>Mineral chemistry</term>
<term>Miocene</term>
<term>Northern greece</term>
<term>Oceanic</term>
<term>Opaque rims</term>
<term>Orion</term>
<term>Orthopyroxene</term>
<term>Oxylithos</term>
<term>Oxylithos andesite</term>
<term>Oxylithos andesites</term>
<term>Oxylithos rocks</term>
<term>Oxylithos volcanics</term>
<term>Petrol</term>
<term>Phenocrysts</term>
<term>Phlogopite</term>
<term>Piper</term>
<term>Plagioclase</term>
<term>Plagioclase phenocrysts</term>
<term>Porphyritic</term>
<term>Porphyritic dacite</term>
<term>Pyroclastic</term>
<term>Pyroxene</term>
<term>Quartz</term>
<term>Rhyolite</term>
<term>Sio2</term>
<term>Subducted</term>
<term>Subducted slab</term>
<term>Subduction</term>
<term>Tatsumi</term>
<term>Trace elements</term>
<term>Unwin hyman</term>
<term>Volcanic rocks</term>
<term>Volcanism</term>
<term>Western aegean</term>
<term>Xenolith</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en"><term>Adakites</term>
<term>Amphibole</term>
<term>Andesite</term>
<term>Aphyric</term>
<term>Aphyric dacite</term>
<term>Biotite</term>
<term>Boninite</term>
<term>Boninites</term>
<term>Bronzite</term>
<term>Bronzite phenocrysts</term>
<term>Clast</term>
<term>Clinopyroxene</term>
<term>Contrib</term>
<term>Crust</term>
<term>Crystallisation</term>
<term>Dacite</term>
<term>Defant</term>
<term>Early miocene</term>
<term>Earth planet</term>
<term>Evia</term>
<term>Felsic</term>
<term>Felsic pyroclastic rocks</term>
<term>Fractional crystallisation</term>
<term>Geol</term>
<term>Groundmass</term>
<term>High temperatures</term>
<term>Hornblende</term>
<term>Igneous rocks</term>
<term>Isotope</term>
<term>Isotopic composition</term>
<term>Lacustrine</term>
<term>Lava</term>
<term>Lett</term>
<term>Limited extent</term>
<term>Magma</term>
<term>Magnesian</term>
<term>Magnesian andesites</term>
<term>Middle miocene</term>
<term>Mineral chemistry</term>
<term>Miocene</term>
<term>Northern greece</term>
<term>Oceanic</term>
<term>Opaque rims</term>
<term>Orion</term>
<term>Orthopyroxene</term>
<term>Oxylithos</term>
<term>Oxylithos andesite</term>
<term>Oxylithos andesites</term>
<term>Oxylithos rocks</term>
<term>Oxylithos volcanics</term>
<term>Petrol</term>
<term>Phenocrysts</term>
<term>Phlogopite</term>
<term>Piper</term>
<term>Plagioclase</term>
<term>Plagioclase phenocrysts</term>
<term>Porphyritic</term>
<term>Porphyritic dacite</term>
<term>Pyroclastic</term>
<term>Pyroxene</term>
<term>Quartz</term>
<term>Rhyolite</term>
<term>Sio2</term>
<term>Subducted</term>
<term>Subducted slab</term>
<term>Subduction</term>
<term>Tatsumi</term>
<term>Trace elements</term>
<term>Unwin hyman</term>
<term>Volcanic rocks</term>
<term>Volcanism</term>
<term>Western aegean</term>
<term>Xenolith</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Essence</term>
</keywords>
</textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Abstract: Mid-Miocene volcanic rocks are rare in the Aegean region, although early Miocene and late Miocene-Quaternary volcanism is widespread. At Oxylithos (island of Evia), 14 Ma dacites form a dome or sub-volcanic complex. Phreatomagmatic eruptions formed nearby rhyolitic pyroclastic surge deposits. The calc-alkaline dacites contain bronzite, Mg-rich clinopyroxene, phlogopite and plagioclase phenocrysts. The magma results from mixing of a Mg-rich andesitic magma, similar to that in the nearby island of Skyros, with more felsic magmas represented by the rhyolitic pyroclastics. The dacites are geochemically similar to adakites, which are derived by partial melting of eclogitic subducted oceanic crust and have low Y and Yb and high SrY ratio. 87Sr86Sr≈0.7095 is found in both dacite and rhyolite. Lead isotopic composition from the high-Mg andesite from Skyros, with 207Pb204Pb= 15.70 and 208Pb204Pb= 38.90, forms a linear trend with Evia dacite and rhyolite with 207Pb204Pb= 15.71 and 208Pb204Pb= 39.05. The high temperatures required to produce such magma resulted from decompression due to extension of the Aegean basin at the same time as the initial intrusion of the detached subducted slab in the western Aegean that has been imaged by seismic tomography. The Oxylithos rocks extend the known occurrences of adakite series rocks: this series is not restricted to sites with subduction of young oceanic crust.</div>
</front>
</TEI>
<affiliations><list><country><li>Canada</li>
</country>
</list>
<tree><country name="Canada"><noRegion><name sortKey="Pe Piper, Georgia" sort="Pe Piper, Georgia" uniqKey="Pe Piper G" first="Georgia" last="Pe-Piper">Georgia Pe-Piper</name>
</noRegion>
<name sortKey="Piper, David J W" sort="Piper, David J W" uniqKey="Piper D" first="David J. W." last="Piper">David J. W. Piper</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/NissirosV1/Data/Main/Exploration

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000350 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000350 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Terre
   |area=    NissirosV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     ISTEX:A0FE82A1D8D44140075738A292C0057A63F20130
   |texte=   Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension
}}

This area was generated with Dilib version V0.6.33.
Data generation: Tue Jan 16 00:18:27 2018. Site generation: Mon Feb 1 22:09:13 2021

	Serveur d'exploration Nissiros
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.

Serveur d'exploration Nissiros

Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension

Miocene magnesian andesites and dacites, Evia, Greece: adakites associated with subducting slab detachment and extension

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri