Découverte d'un système hydrothermal océanique fossile dans l'ophiolite antécambrienne de Khzama (massif du Siroua, Anti-Atlas marocain)
Identifieur interne : 000381 ( France/Analysis ); précédent : 000380; suivant : 000382Découverte d'un système hydrothermal océanique fossile dans l'ophiolite antécambrienne de Khzama (massif du Siroua, Anti-Atlas marocain)
Auteurs : Hassan Admou [Maroc] ; Thierry Juteau [France]Source :
- Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science [ 1251-8050 ] ; 1998.
Descripteurs français
English descriptors
- KwdEn :
Abstract
Abstract: The Khzama Precambrian ophiolite, tectonized and metamorphosed, exhibits all the lithological units of a complete ophiolite suite. The dyke complex, studied in detail in three tectonic slices, consists of isotropic to laminated, sometimes banded gabbros (about 50 %), crosscut by swarms of isolated diabase dykes with systematic chilled margins (about 50 %). This dyke complex unit shows a remarkably preserved network of fossil hydrothermal veins, consisting of quartz-epidote-sulfides associations, mostly oriented parallel to the margins of the diabase dykes. Greenish epidosites form veins and pockets, around which the diabases are impregnated with still fresh and shining sulfides, disseminated in the dykes' groundmass. These characteristics are identical to those described in fossil hydrothermal systems of much younger ophiolites, such as the cretaceous ophiolites of Oman or Cyprus, in the lower part of the sheeted dyke complex. The Khzama fossil hydrothermal system could constitute one of the most ancient oceanic hydrothermal systems developed at an oceanic spreading centre.
Url:
DOI: 10.1016/S1251-8050(98)80052-9
Affiliations:
- France, Maroc
- Marrakech-Tensift-Al Haouz, Région Bretagne
- Brest, Marrakech
- Université de Bretagne Occidentale
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 006850
- to stream Istex, to step Curation: 006850
- to stream Istex, to step Checkpoint: 004494
- to stream Main, to step Merge: 009D02
- to stream Main, to step Curation: 009837
- to stream Main, to step Exploration: 009837
- to stream France, to step Extraction: 000381
Links to Exploration step
ISTEX:D235AF63168D5CFEF5251C440F4AA4A7E285F4DALe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="fr">Découverte d'un système hydrothermal océanique fossile dans l'ophiolite antécambrienne de Khzama (massif du Siroua, Anti-Atlas marocain)</title>
<author><name sortKey="Admou, Hassan" sort="Admou, Hassan" uniqKey="Admou H" first="Hassan" last="Admou">Hassan Admou</name>
</author>
<author><name sortKey="Juteau, Thierry" sort="Juteau, Thierry" uniqKey="Juteau T" first="Thierry" last="Juteau">Thierry Juteau</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:D235AF63168D5CFEF5251C440F4AA4A7E285F4DA</idno>
<date when="1998" year="1998">1998</date>
<idno type="doi">10.1016/S1251-8050(98)80052-9</idno>
<idno type="url">https://api.istex.fr/document/D235AF63168D5CFEF5251C440F4AA4A7E285F4DA/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">006850</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">006850</idno>
<idno type="wicri:Area/Istex/Curation">006850</idno>
<idno type="wicri:Area/Istex/Checkpoint">004494</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">004494</idno>
<idno type="wicri:doubleKey">1251-8050:1998:Admou H:decouverte:d:un</idno>
<idno type="wicri:Area/Main/Merge">009D02</idno>
<idno type="wicri:Area/Main/Curation">009837</idno>
<idno type="wicri:Area/Main/Exploration">009837</idno>
<idno type="wicri:Area/France/Extraction">000381</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="fr">Découverte d'un système hydrothermal océanique fossile dans l'ophiolite antécambrienne de Khzama (massif du Siroua, Anti-Atlas marocain)</title>
<author><name sortKey="Admou, Hassan" sort="Admou, Hassan" uniqKey="Admou H" first="Hassan" last="Admou">Hassan Admou</name>
<affiliation wicri:level="3"><country xml:lang="fr">Maroc</country>
<wicri:regionArea>Département des sciences de la Terre, faculté des sciences Semlalia, Université Cadi-Ayyad, bd Prince-Moulay-Abdellah, BP S 15, Marrakech</wicri:regionArea>
<placeName><settlement type="city">Marrakech</settlement>
<region nuts="2">Marrakech-Tensift-Al Haouz</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Juteau, Thierry" sort="Juteau, Thierry" uniqKey="Juteau T" first="Thierry" last="Juteau">Thierry Juteau</name>
<affiliation wicri:level="4"><country xml:lang="fr">France</country>
<wicri:regionArea>Domaines océaniques, département des sciences de la Terre et UMR 6538, université de Bretagne Occidentale, IUEM, place Nicolas-Copernic, 29280 Plouzané</wicri:regionArea>
<orgName type="university">Université de Bretagne Occidentale</orgName>
<placeName><settlement type="city">Brest</settlement>
<region type="region" nuts="2">Région Bretagne</region>
</placeName>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science</title>
<title level="j" type="abbrev">PXTOLD</title>
<idno type="ISSN">1251-8050</idno>
<imprint><publisher>ELSEVIER</publisher>
<date type="published" when="1998">1998</date>
<biblScope unit="volume">327</biblScope>
<biblScope unit="issue">5</biblScope>
<biblScope unit="page" from="335">335</biblScope>
<biblScope unit="page" to="340">340</biblScope>
</imprint>
<idno type="ISSN">1251-8050</idno>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">1251-8050</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anti-Atlas</term>
<term>Maroc</term>
<term>Morocco</term>
<term>Precambrian</term>
<term>Précambrien</term>
<term>complexe filonien</term>
<term>dyke complex</term>
<term>hydrothermalisme océanique</term>
<term>oceanic hydrothermalism</term>
<term>ophiolites</term>
</keywords>
<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Maroc</term>
<term>Maroc</term>
</keywords>
</textClass>
<langUsage><language ident="fr">fr</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Abstract: The Khzama Precambrian ophiolite, tectonized and metamorphosed, exhibits all the lithological units of a complete ophiolite suite. The dyke complex, studied in detail in three tectonic slices, consists of isotropic to laminated, sometimes banded gabbros (about 50 %), crosscut by swarms of isolated diabase dykes with systematic chilled margins (about 50 %). This dyke complex unit shows a remarkably preserved network of fossil hydrothermal veins, consisting of quartz-epidote-sulfides associations, mostly oriented parallel to the margins of the diabase dykes. Greenish epidosites form veins and pockets, around which the diabases are impregnated with still fresh and shining sulfides, disseminated in the dykes' groundmass. These characteristics are identical to those described in fossil hydrothermal systems of much younger ophiolites, such as the cretaceous ophiolites of Oman or Cyprus, in the lower part of the sheeted dyke complex. The Khzama fossil hydrothermal system could constitute one of the most ancient oceanic hydrothermal systems developed at an oceanic spreading centre.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
<li>Maroc</li>
</country>
<region><li>Marrakech-Tensift-Al Haouz</li>
<li>Région Bretagne</li>
</region>
<settlement><li>Brest</li>
<li>Marrakech</li>
</settlement>
<orgName><li>Université de Bretagne Occidentale</li>
</orgName>
</list>
<tree><country name="Maroc"><region name="Marrakech-Tensift-Al Haouz"><name sortKey="Admou, Hassan" sort="Admou, Hassan" uniqKey="Admou H" first="Hassan" last="Admou">Hassan Admou</name>
</region>
</country>
<country name="France"><region name="Région Bretagne"><name sortKey="Juteau, Thierry" sort="Juteau, Thierry" uniqKey="Juteau T" first="Thierry" last="Juteau">Thierry Juteau</name>
</region>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Santé/explor/EdenteV2/Data/France/Analysis
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000381 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/France/Analysis/biblio.hfd -nk 000381 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Santé |area= EdenteV2 |flux= France |étape= Analysis |type= RBID |clé= ISTEX:D235AF63168D5CFEF5251C440F4AA4A7E285F4DA |texte= Découverte d'un système hydrothermal océanique fossile dans l'ophiolite antécambrienne de Khzama (massif du Siroua, Anti-Atlas marocain) }}
This area was generated with Dilib version V0.6.32. |