Feneyrol J., Giuliani Gaston, Ohnenstetter D., Le Goff E., Malisa E. P. J., Saul M., Saul E., Saul J., Pardieu V. (2010). Lithostratigraphic and structural controls of 'tsavorite' deposits at Lemshuku, Merelani area, Tanzania. Comptes Rendus Geoscience, 342 (10), p. 778-785. ISSN 1631-0713.
Titre du document
Lithostratigraphic and structural controls of 'tsavorite' deposits at Lemshuku, Merelani area, Tanzania
Feneyrol J., Giuliani Gaston, Ohnenstetter D., Le Goff E., Malisa E. P. J., Saul M., Saul E., Saul J., Pardieu V.
Source
Comptes Rendus Geoscience, 2010,
342 (10), p. 778-785 ISSN 1631-0713
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.
