Indium in cassiterite and ores of tin deposits |
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| Institution: | 1. Institute of Geology and Mineralogy, Russian Academy of Sciences, Siberian Branch, Koptyuga pr. 3, 630090 Novosibirsk, Russia;2. Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia;3. Tomsk State University, Lenina str., 36, 634050 Tomsk, Russia;4. TU Bergakademie Freiberg, Brennhausgasse 14, D-09596 Freiberg, Germany;5. Institute of Geological Sciences, Academy of Science and Technology, Chua Lang str. 84, Hanoi, Vietnam;1. Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education, School of Geosciences and Info-physics, Central South University, Changsha 410083, PR China;2. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China;3. Solid Earth Studies Laboratory, Department of Geology, University of Regina, Regina, Saskatchewan S4S 0A2, Canada;4. Lunar and Planetary Science Research Center, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China;1. Department of Geography and Geology, University of Turku, FIN-20014, Finland;2. Ödemarksvägen 107, FIN-49220 Broby, Finland;3. School of Chemical Engineering, University of Adelaide, Adelaide SA 5005, Australia;1. Universidade de Brasília, Instituto de Geociências, Brasília, DF 70910-900, Brazil;2. Department of Geological Sciences and Geological Engineering, Queen''s University, Kingston, Ontario K7L 3N6, Canada;1. GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany;2. Mineralogisch-Petrographisches Institut, University of Basel, Bernoullistrasse 30, 4056 Basel, Switzerland;3. Department of Geology, Faculty of Science, University of Salamanca, Plaza de los Caídos s/n, 37008 Salamanca, Spain |
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| Abstract: | The results obtained with LA-ICP-MS by less abundant lighter 113In isotope and EPMA show that in cassiterite of cassiterite–quartz veins the indium contents do not exceed 160 ppm, while cassiterite from Sn–sulfide veins is characterized by higher indium contents from 40 to 485 ppm; sulfides of Sn–sulfide veins unlike sulfides of cassiterite–quartz veins also have the highest indium contents: Fe-sphalerite (100–25,000 ppm), chalcopyrite (up to 1000 ppm), and stannite (up to 60,000 ppm). Indium contents in the Sn–sulfide ore of the Tigrinoe and Pravourmiiskoe deposits obtained using SR-XRF, ICP-MS and atomic absorption methods range from 10 to 433 ppm with average values of 56–65 ppm. Indium-rich Sn–sulfide mineralization in five large Sn–Ag ore districts of the Far East Russia (Khingansky, Badzhalsky, Komsomolsky, Arminsky, Kavalerovsky) provides the impetus for further exploration of deposits with Sn–sulfide mineralization as the most promising indium resources in Russia. Empirical observations from geology and geochronology of cassiterite–quartz and Sn–sulfide mineralization show that the combined contribution from granite and alkaline–subalkaline mafic sources and multistage ore-forming processes doubled indium resources of deposits being the main factors in the formation of high grade indium mineralization. |
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