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Hydrothermal garnierite; an occurrence at Bou Azzer, Morocco

Jacques Ducloux, Hassan Boukili, Alain Decarreau, Sabine Petit, Alain Perruchot and Philippe Pradel
Un gite hydrothermal de garnierites; l'exemple de Bou Azzer, Maroc
European Journal of Mineralogy (December 1993) 5 (6): 1205-1215


In the mining district of Bou Azzer, Morocco, garnierites containing variable proportions of Ni-kerolite and Ni-lizardite occur in a serpentinized ultramafic body of Precambrian age. These garnierites have 2.03-3.20 wt.% Co replacing Ni. Their delta (super 18) O value of +16.5 per mille and the random distribution of Ni and Mg cations in the octahedral sheet of kerolites indicate a T of formation > 25 degrees C. These results and the occurrence of garnierites in veins in association with Ni-arsenate ores show that these garnierites were formed during an early low-T hydrothermal event. All other garnierite occurrences have been attributed to lateritic weathering of ultramafic rocks.

ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 6
Title: Un gite hydrothermal de garnierites; l'exemple de Bou Azzer, Maroc
Translated Title: Hydrothermal garnierite; an occurrence at Bou Azzer, Morocco
Affiliation: Universite de Poitiers, Pedologie, Petrologie et Metallogenie de la Surface, Poitiers, France
Pages: 1205-1215
Published: 199312
Text Language: French
Summary Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 45
Accession Number: 1994-001555
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N30°34'60" - N30°34'60", W06°45'00" - W06°45'00"
Secondary Affiliation: CPR Derb Ghallef, MAR, MoroccoUniversite Paris-Sud, FRA, France
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199401
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