CobaltMaghrebV1, France, Analysis, bibRecord, 000444

Un gîte hydrothermal de garniérites: l'exemple de Bou Azzer, Maroc

Identifieur interne : 000444 ( France/Analysis ); précédent : 000443; suivant : 000445

Un gîte hydrothermal de garniérites: l'exemple de Bou Azzer, Maroc

Auteurs : J. Ducloux [France] ; H. Boukili [France] ; A. Decarreau [France] ; S. Petit [France] ; A. Perruchot [France] ; P. Pradel [France]

Source :

European journal of mineralogy : (1989)

RBID : Pascal:94-0033515

Descripteurs français

Pascal (Inist)
- Garnierite, Serpentinite, Lizardite, Pimelite, Nepouite, Ultrabasite, Ophiolite, Antécambrien, Maroc, Gîte hydrothermal, Nickel, Substitution, Cobalt, Isotope stable, O 18, Géothermométrie, Faille, Filon, Carbonate, Minéralisation, Arséniate, Basse température, Analyse chimique, Kerolite, Boutonnière Bou Azzer, Diffraction RX, Diagramme poudre, spectre IR.
Wicri :
- geographic : Maroc.
- topic : Nickel, Cobalt.

English descriptors

KwdEn :
- Morocco, O-18, Precambrian, X-ray diffraction analysis, X-ray powder diffraction, arsenates, carbonates, chemical composition, cobalt, faults, garnierite, geologic thermometry, hydrothermal processes, infrared spectra, lizardite, low temperature, mineralization, nepouite, nickel, ophiolite, pimelite, serpentinite, stable isotopes, substitution, ultramafics, veins.

Abstract

In the mining district of Bou Azzer, garnierites containing variable proportions of Ni-kerolite and Ni-lizardite occur within a serpentinized ultramafic body of Precambrian-II age. These garnierites have high Ni-contents partially substituted by Co. Their oxygen isotope composition (δ¹⁸O = + 16.5‰) and the random distribution of Ni and Mg cations in the octahedral sheet of kerolites indicate a formation temperature higher than 25°C. These data and the occurrence of gamierites within veins, located along faults and associated with Ni-arsenate ores, show that these garnierites were formed during an early low-temperature hydrothermal event. This is the first record of such a garnierite occurrence since all the other ones, recent or ancient, are considered as lateritic weathering products of ultramafic rocks

Affiliations:

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

to stream PascalFrancis, to step Corpus: 000369
to stream PascalFrancis, to step Curation: 000334
to stream PascalFrancis, to step Checkpoint: 000366
to stream Main, to step Merge: 001344
to stream Main, to step Curation: 001293
to stream Main, to step Exploration: 001293
to stream France, to step Extraction: 000444

Links to Exploration step

Pascal:94-0033515

Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="fr" level="a">Un gîte hydrothermal de garniérites: l'exemple de Bou Azzer, Maroc</title>
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<author><name sortKey="Pradel, P" sort="Pradel, P" uniqKey="Pradel P" first="P." last="Pradel">P. Pradel</name>
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<series><title level="j" type="main">European journal of mineralogy : (1989)</title>
<title level="j" type="abbreviated">Eur. j. mineral. : (1989)</title>
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<seriesStmt><title level="j" type="main">European journal of mineralogy : (1989)</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Morocco</term>
<term>O-18</term>
<term>Precambrian</term>
<term>X-ray diffraction analysis</term>
<term>X-ray powder diffraction</term>
<term>arsenates</term>
<term>carbonates</term>
<term>chemical composition</term>
<term>cobalt</term>
<term>faults</term>
<term>garnierite</term>
<term>geologic thermometry</term>
<term>hydrothermal processes</term>
<term>infrared spectra</term>
<term>lizardite</term>
<term>low temperature</term>
<term>mineralization</term>
<term>nepouite</term>
<term>nickel</term>
<term>ophiolite</term>
<term>pimelite</term>
<term>serpentinite</term>
<term>stable isotopes</term>
<term>substitution</term>
<term>ultramafics</term>
<term>veins</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Garnierite</term>
<term>Serpentinite</term>
<term>Lizardite</term>
<term>Pimelite</term>
<term>Nepouite</term>
<term>Ultrabasite</term>
<term>Ophiolite</term>
<term>Antécambrien</term>
<term>Maroc</term>
<term>Gîte hydrothermal</term>
<term>Nickel</term>
<term>Substitution</term>
<term>Cobalt</term>
<term>Isotope stable</term>
<term>O 18</term>
<term>Géothermométrie</term>
<term>Faille</term>
<term>Filon</term>
<term>Carbonate</term>
<term>Minéralisation</term>
<term>Arséniate</term>
<term>Basse température</term>
<term>Analyse chimique</term>
<term>Kerolite</term>
<term>Boutonnière Bou Azzer</term>
<term>Diffraction RX</term>
<term>Diagramme poudre</term>
<term>spectre IR</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Maroc</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Nickel</term>
<term>Cobalt</term>
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<front><div type="abstract" xml:lang="en">In the mining district of Bou Azzer, garnierites containing variable proportions of Ni-kerolite and Ni-lizardite occur within a serpentinized ultramafic body of Precambrian-II age. These garnierites have high Ni-contents partially substituted by Co. Their oxygen isotope composition (δ<sup>18</sup>
O = + 16.5‰) and the random distribution of Ni and Mg cations in the octahedral sheet of kerolites indicate a formation temperature higher than 25°C. These data and the occurrence of gamierites within veins, located along faults and associated with Ni-arsenate ores, show that these garnierites were formed during an early low-temperature hydrothermal event. This is the first record of such a garnierite occurrence since all the other ones, recent or ancient, are considered as lateritic weathering products of ultramafic rocks</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
</country>
<region><li>Nouvelle-Aquitaine</li>
<li>Poitou-Charentes</li>
<li>Île-de-France</li>
</region>
<settlement><li>Orsay</li>
<li>Poitiers</li>
</settlement>
</list>
<tree><country name="France"><region name="Nouvelle-Aquitaine"><name sortKey="Ducloux, J" sort="Ducloux, J" uniqKey="Ducloux J" first="J." last="Ducloux">J. Ducloux</name>
</region>
<name sortKey="Boukili, H" sort="Boukili, H" uniqKey="Boukili H" first="H." last="Boukili">H. Boukili</name>
<name sortKey="Decarreau, A" sort="Decarreau, A" uniqKey="Decarreau A" first="A." last="Decarreau">A. Decarreau</name>
<name sortKey="Perruchot, A" sort="Perruchot, A" uniqKey="Perruchot A" first="A." last="Perruchot">A. Perruchot</name>
<name sortKey="Petit, S" sort="Petit, S" uniqKey="Petit S" first="S." last="Petit">S. Petit</name>
<name sortKey="Pradel, P" sort="Pradel, P" uniqKey="Pradel P" first="P." last="Pradel">P. Pradel</name>
</country>
</tree>
</affiliations>
</record>

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Un gîte hydrothermal de garniérites: l'exemple de Bou Azzer, Maroc

Un gîte hydrothermal de garniérites: l'exemple de Bou Azzer, Maroc

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