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Article Dans Une Revue Comptes Rendus Géoscience Année : 2010

Lithostratigraphic and structural controls of 'tsavorite' deposits at Lemshuku, Merelani area, Tanzania

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Résumé

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.
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Dates et versions

hal-00563709 , version 1 (07-02-2011)

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Julien Feneyrol, Gaston Giuliani, Daniel Ohnenstetter, Elisabeth Le Goff, Elias P.J. Malisa, et al.. Lithostratigraphic and structural controls of 'tsavorite' deposits at Lemshuku, Merelani area, Tanzania. Comptes Rendus Géoscience, 2010, 342 (10), pp.778-785. ⟨10.1016/j.crte.2010.06.003⟩. ⟨hal-00563709⟩
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