 | | Journal (article/letter/editorial) | | Park Johannesburg, South Africa brucec@uj.ac.za TSAVORITE The Green Gem Variety of Grossular Merelani Hills...hibschite, hydrogrossular (Transvaal jade), and tsavorite, the emerald-green grossular. Variably colored...depth and intensity of color to be considered tsavorite?” The answer is not straightforward but depends...superseded by the accepted name tsavorite (Bridges 1974). The term tsavorite is used here where the appropriate...literature for a locality specifically mentions tsavorite and provides op252 ROCKS & MINERALS tical and/or |  | Giuliani, Gaston, Fallick, Anthony E., Feneyrol, Julien, Ohnenstetter, Daniel, Pardieu, Vincent, Saul, Mark (2011) 18O/16O and V/Cr ratios in gem tsavorites from the Neoproterozoic Mozambique metamorphic belt: a clue towards their origins?. Mineralium Deposita, 46 (7) 671-676 doi:10.1007/s00126-011-0355-6 | Journal (article/letter/editorial) | | Neoproterozic metasedimentary series. The δ18O value of tsavorite is a good tracer of the environment of its formation;...formation; the δ18O of the fluid in equilibrium with tsavorite was buffered by the host rock during metamorphism...step in characterizing the geochemistry of gem tsavorite from most of the deposits and occurrences worldwide...worldwide. Keywords Mozambique Metamorphic Belt . Tsavorite . Oxygen isotopes . V/Cr ratio . Mn . Geographic...geologic origins Introduction The common name tsavorite used in the American trade refers to the green |  | Feneyrol, Julien, Giuliani, Gaston, Ohnenstetter, Daniel, Rondeau, Benjamin, Fritsch, Emmanuel, Fallick, Anthony E., Ichang'i, Daniel, Omito, Edward, Rakotondrazafy, Michel, Ranatsenho, Madison, Lallier, Florent (2014) New typology and origin of tsavorite based on trace-element chemistry. European Journal of Mineralogy, 26 (2) 293-308 doi:10.1127/0935-1221/2014/0026-2367 | Journal (article/letter/editorial) | | Fast Track Article New typology and origin of tsavorite based on trace-element chemistry oo f JULIEN...the ultraviolet–visible–near infrared. Type 1 tsavorite spectra show a total absorption below 430 nm due...Type 2 tsavorite spectra present the classical absorption bands of V. Types 3 and 4 tsavorite spectra... whereas spectra of Cr-bearing types 4 and 5 tsavorite show the two additional bands of Cr3þ at 697 and...provenance of economic tsavorite from Kenya, Tanzania and Madagascar. Key-words: tsavorite, green grossular |  | Feneyrol, J., Ohnenstetter, D., Giuliani, G., Fallick, A. E., Rollion-Bard, C., Robert, J.-L., Malisa, E. P. (2012) EVIDENCE OF EVAPORITES IN THE GENESIS OF THE VANADIAN GROSSULAR 'TSAVORITE' DEPOSIT IN NAMALULU, TANZANIA. The Canadian Mineralogist, 50 (3) 745-769 doi:10.3749/canmin.50.3.745 | Journal (article/letter/editorial) | | EVAPORITES IN THE GENESIS OF THE VANADIAN GROSSULAR ‘TSAVORITE’ DEPOSIT IN NAMALULU, TANZANIA Julien FENEYROL...Dar-es-Salaam, Tanzania Abstract The Namalulu tsavorite (vanadian grossular up to 0.80 wt.% V2O3) deposit...precipitating calcite and mobilizing the elements for tsavorite crystallization in quartz-calcite veins. The dolomitic...deposited in a marine coastal sabkha located at the eastern margin of the Congo-Kalahari cratons bounded by...Mozambique Ocean during early Neoproterozoic. Tsavorite formed in the Ca-metasomatized gneiss during amphibolite |
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