AustralieFrV1, Main, Exploration, bibRecord, 00BA76

A 3.5 Ga granite–gneiss basement in Guinea: further evidence for early archean accretion within the West African Craton

Identifieur interne : 00BA76 ( Main/Exploration ); précédent : 00BA75; suivant : 00BA77

A 3.5 Ga granite–gneiss basement in Guinea: further evidence for early archean accretion within the West African Craton

Auteurs : Denis Thiéblemont [France] ; Claude Delor [France] ; Alain Cocherie [France] ; Jean Michel Lafon [Brésil] ; Jean Christian Goujou [France] ; Alhassane Baldé [Guinée] ; Mamadou Bah [Guinée] ; Hadi Sané [Guinée] ; C. Mark Fanning [Australie]

Source :

Precambrian Research [ 0301-9268 ] ; 2001.

RBID : ISTEX:AF99E6B00935A05AA1C76A69AEC5CDDC4F97B5CB

Descripteurs français

Wicri :
- geographic : Guinée.

English descriptors

KwdEn :
- Amphibolite, Archean, Average composition, Balde, Basic protolith, Batholith, Bering, Brgm, Carte, Carte geologique, Cocherie, Conakry, Concordia diagram, Craton, Crustal accretion, Delor, Detrital zircons, Dnrgh, Early Archean, Early archean, Eclogite facies conditions, Error ellipses, Facies, Feuille, Garnet, Geochronological, Geochronological data, Geol, Geologie, Geologique, Gneiss, Goujou, Granulitic metagabbro, Guelemata orthogneiss, Guinea, Guinee, Kenema-Man domain, Kouamelan, Lafon tegyey, Liberian, Liberian granitoids, Macenta, Macenta batholith, Metagabbro, Metamorphic, Metamorphic series, Ministere, Monzogranite, Nimba, Northern nigeria, Notice explicative, Orthogneiss, Plagioclase, Porphyritic, Porphyritic monzogranite, Precambrian, Precambrian research, Protolith, Reguibat rise, Same conditions, Sierra leone, Simandou series, Spot analyses, Structural trend, Thieblemont, Tounkarata, Tounkarata batholith, Trondhjemitic, Trondhjemitic gneiss, West African Craton, West africa, West african craton, Western slopes, Zircon.
Teeft :
- Amphibolite, Archean, Average composition, Balde, Basic protolith, Batholith, Bering, Brgm, Carte, Carte geologique, Cocherie, Conakry, Concordia diagram, Craton, Crustal accretion, Delor, Detrital zircons, Dnrgh, Early archean, Eclogite facies conditions, Error ellipses, Facies, Feuille, Garnet, Geochronological, Geochronological data, Geol, Geologie, Geologique, Gneiss, Goujou, Granulitic metagabbro, Guelemata orthogneiss, Guinea, Guinee, Kouamelan, Lafon tegyey, Liberian, Liberian granitoids, Macenta, Macenta batholith, Metagabbro, Metamorphic, Metamorphic series, Ministere, Monzogranite, Nimba, Northern nigeria, Notice explicative, Orthogneiss, Plagioclase, Porphyritic, Porphyritic monzogranite, Precambrian, Precambrian research, Protolith, Reguibat rise, Same conditions, Sierra leone, Simandou series, Spot analyses, Structural trend, Thieblemont, Tounkarata, Tounkarata batholith, Trondhjemitic, Trondhjemitic gneiss, West africa, West african craton, Western slopes, Zircon.

Abstract

Abstract: A granite–gneiss formation (Guélémata Orthogneiss) was mapped on the northern and western slopes of the Mount Nimba hill range in Guinea. The original rocks were high-Al, low-Yb, medium to high-K granites similar to most Archean TTG. Analyses of U and Pb isotopes in zircons, using an ion-microprobe (SHRIMP), gave ages of 3542 and 3535 Ma respectively for the granite–gneiss and a neighbouring granulitic metagabbro. These are the oldest ages so far reported from the Archean Kenema-Man domain of West Africa. Partial melting of an unfractionated basalt under eclogite facies conditions appears to be a suitable model for the origin of the granite–gneiss.

Url:

https://api.istex.fr/document/AF99E6B00935A05AA1C76A69AEC5CDDC4F97B5CB/fulltext/pdf

DOI: 10.1016/S0301-9268(00)00160-1

Affiliations:

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

to stream Istex, to step Corpus: 002150
to stream Istex, to step Curation: 002150
to stream Istex, to step Checkpoint: 001E82
to stream Main, to step Merge: 00C921
to stream Main, to step Curation: 00BA76

Le document en format XML

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<term>Archean</term>
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<term>Balde</term>
<term>Basic protolith</term>
<term>Batholith</term>
<term>Bering</term>
<term>Brgm</term>
<term>Carte</term>
<term>Carte geologique</term>
<term>Cocherie</term>
<term>Conakry</term>
<term>Concordia diagram</term>
<term>Craton</term>
<term>Crustal accretion</term>
<term>Delor</term>
<term>Detrital zircons</term>
<term>Dnrgh</term>
<term>Early Archean</term>
<term>Early archean</term>
<term>Eclogite facies conditions</term>
<term>Error ellipses</term>
<term>Facies</term>
<term>Feuille</term>
<term>Garnet</term>
<term>Geochronological</term>
<term>Geochronological data</term>
<term>Geol</term>
<term>Geologie</term>
<term>Geologique</term>
<term>Gneiss</term>
<term>Goujou</term>
<term>Granulitic metagabbro</term>
<term>Guelemata orthogneiss</term>
<term>Guinea</term>
<term>Guinee</term>
<term>Kenema-Man domain</term>
<term>Kouamelan</term>
<term>Lafon tegyey</term>
<term>Liberian</term>
<term>Liberian granitoids</term>
<term>Macenta</term>
<term>Macenta batholith</term>
<term>Metagabbro</term>
<term>Metamorphic</term>
<term>Metamorphic series</term>
<term>Ministere</term>
<term>Monzogranite</term>
<term>Nimba</term>
<term>Northern nigeria</term>
<term>Notice explicative</term>
<term>Orthogneiss</term>
<term>Plagioclase</term>
<term>Porphyritic</term>
<term>Porphyritic monzogranite</term>
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<term>Precambrian research</term>
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<term>Reguibat rise</term>
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<term>Simandou series</term>
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<term>Tounkarata batholith</term>
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<term>Trondhjemitic gneiss</term>
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<term>West africa</term>
<term>West african craton</term>
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<term>Archean</term>
<term>Average composition</term>
<term>Balde</term>
<term>Basic protolith</term>
<term>Batholith</term>
<term>Bering</term>
<term>Brgm</term>
<term>Carte</term>
<term>Carte geologique</term>
<term>Cocherie</term>
<term>Conakry</term>
<term>Concordia diagram</term>
<term>Craton</term>
<term>Crustal accretion</term>
<term>Delor</term>
<term>Detrital zircons</term>
<term>Dnrgh</term>
<term>Early archean</term>
<term>Eclogite facies conditions</term>
<term>Error ellipses</term>
<term>Facies</term>
<term>Feuille</term>
<term>Garnet</term>
<term>Geochronological</term>
<term>Geochronological data</term>
<term>Geol</term>
<term>Geologie</term>
<term>Geologique</term>
<term>Gneiss</term>
<term>Goujou</term>
<term>Granulitic metagabbro</term>
<term>Guelemata orthogneiss</term>
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<term>Guinee</term>
<term>Kouamelan</term>
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<term>Liberian granitoids</term>
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<term>Metamorphic</term>
<term>Metamorphic series</term>
<term>Ministere</term>
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<term>Northern nigeria</term>
<term>Notice explicative</term>
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<front><div type="abstract" xml:lang="en">Abstract: A granite–gneiss formation (Guélémata Orthogneiss) was mapped on the northern and western slopes of the Mount Nimba hill range in Guinea. The original rocks were high-Al, low-Yb, medium to high-K granites similar to most Archean TTG. Analyses of U and Pb isotopes in zircons, using an ion-microprobe (SHRIMP), gave ages of 3542 and 3535 Ma respectively for the granite–gneiss and a neighbouring granulitic metagabbro. These are the oldest ages so far reported from the Archean Kenema-Man domain of West Africa. Partial melting of an unfractionated basalt under eclogite facies conditions appears to be a suitable model for the origin of the granite–gneiss.</div>
</front>
</TEI>
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<li>Brésil</li>
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A 3.5 Ga granite–gneiss basement in Guinea: further evidence for early archean accretion within the West African Craton

A 3.5 Ga granite–gneiss basement in Guinea: further evidence for early archean accretion within the West African Craton

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