%0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Feneyrol, J. %A Giuliani, Gaston %A Ohnenstetter, D. %A Le Goff, E. %A Malisa, E. P. J. %A Saul, M. %A Saul, E. %A Saul, J. %A Pardieu, V. %T Lithostratigraphic and structural controls of 'tsavorite' deposits at Lemshuku, Merelani area, Tanzania %D 2010 %L fdi:010052900 %G ENG %J Comptes Rendus Geoscience %@ 1631-0713 %K Tanzania ; Lemshuku Mine ; "Tsavorite" ; Quartz vein ; Lithostratigraphic ; and structural controls %M ISI:000283470000003 %N 10 %P 778-785 %R 10.1016/j.crte.2010.06.003 %U https://www.documentation.ird.fr/hor/fdi:010052900 %> https://www.documentation.ird.fr/intranet/publi/2010/11/010052900.pdf %V 342 %W Horizon (IRD) %X 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. %$ 064