AustralieFrV1, Main, Merge, bibRecord, 008B12

Evidence of multi-phase Cretaceous to Quaternary alkaline magmatism on Tore-Madeira Rise and neighbouring seamounts from 40Ar/39Ar ages

Identifieur interne : 008B12 ( Main/Merge ); précédent : 008B11; suivant : 008B13

Evidence of multi-phase Cretaceous to Quaternary alkaline magmatism on Tore-Madeira Rise and neighbouring seamounts from 40Ar/39Ar ages

Auteurs : Renaud Merle [Italie] ; Fred Jourdan [Italie, Australie] ; Andrea Marzoli [Italie] ; Paul R. Renne [États-Unis] ; Marion Grange [Australie] ; Jacques Girardeau [France]

Source :

Journal of the Geological Society : (London) [ 0016-7649 ] ; 2009.

RBID : Pascal:09-0391370

Descripteurs français

Pascal (Inist)
- Crétacé, Quaternaire, Magmatisme, Mont sous marin, U-Pb, Lave, Géodynamique, Plagioclase, Amphibole, Biotite, Base de données, Anomalie thermique, Plaque Ibérique, Ile Madère, Portugal, Maroc.
Wicri :
- geographic : Portugal, Maroc.
- topic : Base de données.

English descriptors

KwdEn :
- Cretaceous, Iberian plate, Madeira, Morocco, Portugal, Quaternary, U/Pb, amphibole, biotite, data bases, geodynamics, lava, magmatism, plagioclase, seamounts, thermal anomalies.

Abstract

The Tore-Madeira Rise is a seamount chain located 300 km off the Portugal and Morocco coasts attributed to hotspot activity. U-Pb ages of lavas from the northern and central Tore-Madeira Rise range between 103 and 80.5 Ma whereas ⁴⁰Ar/³⁹Ar ages from the central and southern Tore-Madeira Rise yield ages ranging from 94.5 to 0.5 Ma. We performed new ⁴⁰Ar/³⁹Ar measurements to better understand the geodynamic history of the Tore-Madeira Rise. Plagioclase ages from the Bikini Bottom and Torillon seamounts suggest ages of >90 Ma and ≥60 Ma, respectively. Amphiboles from the Seine seamount yield an age of 24.0 ± 0.8 Ma. Biotites from lavas of the Ashton seamount give ages of 97.4 ± 1.1 Ma and 97.8 ± 1.1 Ma. The geochronological database available on the Tore-Madeira Rise has been filtered on statistical criteria to eliminate unreliable ages. The resulting database reveals three pulses of alkaline magmatism on the Tore-Madeira Rise at 103-80.5 Ma, at c. 68 Ma and between 30 Ma and the present. The magmatism was continuous from 103 Ma until c. 68 Ma and from c. 30 Ma until the present on the Tore-Madeira Rise, the surrounding seamounts and the Portugal coast. We suggest that the space-time distribution of this magmatism results from the interaction between a wide thermal anomaly emitting magmatic pulses and the complex motion of the Iberian plate.

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Le document en format XML

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Ar/<sup>39</sup>
Ar ages</title>
<author><name sortKey="Merle, Renaud" sort="Merle, Renaud" uniqKey="Merle R" first="Renaud" last="Merle">Renaud Merle</name>
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<author><name sortKey="Girardeau, Jacques" sort="Girardeau, Jacques" uniqKey="Girardeau J" first="Jacques" last="Girardeau">Jacques Girardeau</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Evidence of multi-phase Cretaceous to Quaternary alkaline magmatism on Tore-Madeira Rise and neighbouring seamounts from <sup>40</sup>
Ar/<sup>39</sup>
Ar ages</title>
<author><name sortKey="Merle, Renaud" sort="Merle, Renaud" uniqKey="Merle R" first="Renaud" last="Merle">Renaud Merle</name>
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<author><name sortKey="Jourdan, Fred" sort="Jourdan, Fred" uniqKey="Jourdan F" first="Fred" last="Jourdan">Fred Jourdan</name>
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<region type="region" nuts="2">Vénétie</region>
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<author><name sortKey="Marzoli, Andrea" sort="Marzoli, Andrea" uniqKey="Marzoli A" first="Andrea" last="Marzoli">Andrea Marzoli</name>
<affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Dipartimento de Geoscienze, Universita di Padova, Via Giotto 1</s1>
<s2>35137 Padova</s2>
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<wicri:noRegion>35137 Padova</wicri:noRegion>
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</author>
<author><name sortKey="Renne, Paul R" sort="Renne, Paul R" uniqKey="Renne P" first="Paul R." last="Renne">Paul R. Renne</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Berkeley Geochronology Center, 2455 Ridge Road</s1>
<s2>Berkeley, CA 94709</s2>
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</inist:fA14>
<country>États-Unis</country>
<wicri:noRegion>Berkeley, CA 94709</wicri:noRegion>
</affiliation>
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<s3>USA</s3>
<sZ>4 aut.</sZ>
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<country>États-Unis</country>
<wicri:noRegion>Berkeley, CA 94720</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Grange, Marion" sort="Grange, Marion" uniqKey="Grange M" first="Marion" last="Grange">Marion Grange</name>
<affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Department of Applied Geology, Curtin University of Technology, GPO Box U1987</s1>
<s2>Perth, WA 6845</s2>
<s3>AUS</s3>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>Australie</country>
<wicri:noRegion>Perth, WA 6845</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Girardeau, Jacques" sort="Girardeau, Jacques" uniqKey="Girardeau J" first="Jacques" last="Girardeau">Jacques Girardeau</name>
<affiliation wicri:level="4"><inist:fA14 i1="06"><s1>Laboratoire de Planetologie et Geodynamique, UMR-CNRS 6112, Université de Nantes, 2 rue de la Houssinère</s1>
<s2>44322 Nantes</s2>
<s3>FRA</s3>
<sZ>6 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>44322 Nantes</wicri:noRegion>
<wicri:noRegion>2 rue de la Houssinère</wicri:noRegion>
<wicri:noRegion>44322 Nantes</wicri:noRegion>
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<region type="region" nuts="2">Pays de la Loire</region>
</placeName>
</affiliation>
</author>
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<series><title level="j" type="main">Journal of the Geological Society : (London)</title>
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<imprint><date when="2009">2009</date>
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<seriesStmt><title level="j" type="main">Journal of the Geological Society : (London)</title>
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<idno type="ISSN">0016-7649</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cretaceous</term>
<term>Iberian plate</term>
<term>Madeira</term>
<term>Morocco</term>
<term>Portugal</term>
<term>Quaternary</term>
<term>U/Pb</term>
<term>amphibole</term>
<term>biotite</term>
<term>data bases</term>
<term>geodynamics</term>
<term>lava</term>
<term>magmatism</term>
<term>plagioclase</term>
<term>seamounts</term>
<term>thermal anomalies</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Crétacé</term>
<term>Quaternaire</term>
<term>Magmatisme</term>
<term>Mont sous marin</term>
<term>U-Pb</term>
<term>Lave</term>
<term>Géodynamique</term>
<term>Plagioclase</term>
<term>Amphibole</term>
<term>Biotite</term>
<term>Base de données</term>
<term>Anomalie thermique</term>
<term>Plaque Ibérique</term>
<term>Ile Madère</term>
<term>Portugal</term>
<term>Maroc</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Portugal</term>
<term>Maroc</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Base de données</term>
</keywords>
</textClass>
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</teiHeader>
<front><div type="abstract" xml:lang="en">The Tore-Madeira Rise is a seamount chain located 300 km off the Portugal and Morocco coasts attributed to hotspot activity. U-Pb ages of lavas from the northern and central Tore-Madeira Rise range between 103 and 80.5 Ma whereas <sup>40</sup>
Ar/<sup>39</sup>
Ar ages from the central and southern Tore-Madeira Rise yield ages ranging from 94.5 to 0.5 Ma. We performed new <sup>40</sup>
Ar/<sup>39</sup>
Ar measurements to better understand the geodynamic history of the Tore-Madeira Rise. Plagioclase ages from the Bikini Bottom and Torillon seamounts suggest ages of >90 Ma and ≥60 Ma, respectively. Amphiboles from the Seine seamount yield an age of 24.0 ± 0.8 Ma. Biotites from lavas of the Ashton seamount give ages of 97.4 ± 1.1 Ma and 97.8 ± 1.1 Ma. The geochronological database available on the Tore-Madeira Rise has been filtered on statistical criteria to eliminate unreliable ages. The resulting database reveals three pulses of alkaline magmatism on the Tore-Madeira Rise at 103-80.5 Ma, at c. 68 Ma and between 30 Ma and the present. The magmatism was continuous from 103 Ma until c. 68 Ma and from c. 30 Ma until the present on the Tore-Madeira Rise, the surrounding seamounts and the Portugal coast. We suggest that the space-time distribution of this magmatism results from the interaction between a wide thermal anomaly emitting magmatic pulses and the complex motion of the Iberian plate.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>France</li>
<li>Italie</li>
<li>États-Unis</li>
</country>
<region><li>Pays de la Loire</li>
<li>Vénétie</li>
</region>
<settlement><li>Nantes</li>
<li>Padoue</li>
</settlement>
<orgName><li>Université de Nantes</li>
<li>Université de Padoue</li>
</orgName>
</list>
<tree><country name="Italie"><region name="Vénétie"><name sortKey="Merle, Renaud" sort="Merle, Renaud" uniqKey="Merle R" first="Renaud" last="Merle">Renaud Merle</name>
</region>
<name sortKey="Jourdan, Fred" sort="Jourdan, Fred" uniqKey="Jourdan F" first="Fred" last="Jourdan">Fred Jourdan</name>
<name sortKey="Marzoli, Andrea" sort="Marzoli, Andrea" uniqKey="Marzoli A" first="Andrea" last="Marzoli">Andrea Marzoli</name>
</country>
<country name="Australie"><noRegion><name sortKey="Jourdan, Fred" sort="Jourdan, Fred" uniqKey="Jourdan F" first="Fred" last="Jourdan">Fred Jourdan</name>
</noRegion>
<name sortKey="Grange, Marion" sort="Grange, Marion" uniqKey="Grange M" first="Marion" last="Grange">Marion Grange</name>
</country>
<country name="États-Unis"><noRegion><name sortKey="Renne, Paul R" sort="Renne, Paul R" uniqKey="Renne P" first="Paul R." last="Renne">Paul R. Renne</name>
</noRegion>
<name sortKey="Renne, Paul R" sort="Renne, Paul R" uniqKey="Renne P" first="Paul R." last="Renne">Paul R. Renne</name>
</country>
<country name="France"><region name="Pays de la Loire"><name sortKey="Girardeau, Jacques" sort="Girardeau, Jacques" uniqKey="Girardeau J" first="Jacques" last="Girardeau">Jacques Girardeau</name>
</region>
</country>
</tree>
</affiliations>
</record>

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Evidence of multi-phase Cretaceous to Quaternary alkaline magmatism on Tore-Madeira Rise and neighbouring seamounts from 40Ar/39Ar ages

Evidence of multi-phase Cretaceous to Quaternary alkaline magmatism on Tore-Madeira Rise and neighbouring seamounts from 40Ar/39Ar ages

Source :

Descripteurs français

English descriptors

Abstract

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

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri