Lithostratigraphic and structural controls of ‘tsavorite’ deposits at Lemshuku,Merelani area,Tanzania |
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| Authors: | Julien Feneyrol Gaston Giuliani Daniel Ohnenstetter Elisabeth Le Goff Elias P.J. Malisa Mark Saul Eric Saul John Saul Vincent Pardieu |
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| Affiliation: | 1. CRPG-CNRS, Nancy université, 15, rue Notre-Dame-des-Pauvres, 54501 Vandœuvre-lès-Nancy, France;2. IRD-LMTG, 24, avenue Édouard-Belin, 31200 Toulouse, France;3. BRGM, 3, avenue Claude-Guillemin, 45060 Orléans, France;4. Department of Geology, University of Dar-es-Salaam, P.O. Box 35052, Dar-es-Salaam, Tanzania;5. Swala Gem Traders, Sokoine Road, Arusha, Tanzania;6. ORYX, 3, rue Bourdaloue, 75009 Paris, France;g GIA, 10th Floor, U-Chu-Liang Building, 968, Rama IV Road, Silom Bangrak, Bangkok, Thailand |
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| 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. |
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| Keywords: | Tanzania Lemshuku Mine &lsquo Tsavorite&rsquo Quartz vein Lithostratigraphic and structural controls |
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