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Article dans une revue
Lithostratigraphic and structural controls of 'tsavorite' deposits at Lemshuku, Merelani area, Tanzania
Abstract : The first study of the Lemshuku ‘tsavorite' mining district is presented. From bottom to top, the lithostratigraphic column corresponds to a metasedimentary sequence composed of quartzite, fine-grained graphitic gneiss, kyanite-graphite gneiss, biotite-almandine gneiss, metasomatized graphitic gneiss and dolomitic marble. ‘Tsavorite' occurs in quartz veins and rarely as nodular concretions. Two factors control mineralization: (1) lithostratigraphy, with ‘tsavorite' in association with pyrite and graphite confined to quartz veins within the metasomatized graphitic gneiss; and (2) structure, with the mineralized veins characteristically controlled by tight isoclinal folds associated with shearing.
https://hal-brgm.archives-ouvertes.fr/hal-00563709
Contributeur : Marielle Arregros Connectez-vous pour contacter le contributeur
Soumis le : lundi 7 février 2011 - 11:06:38
Dernière modification le : lundi 16 mai 2022 - 08:20:17
Contributeur : Marielle Arregros Connectez-vous pour contacter le contributeur
Soumis le : lundi 7 février 2011 - 11:06:38
Dernière modification le : lundi 16 mai 2022 - 08:20:17