Oxygen isotopic composition of boron minerals from kurchatovite-sakhaite ores of the Solongo deposit
https://doi.org/10.21285/2686-9993-2022-45-2-104-118
Abstract
The Solongo boron-magnetite skarn deposit (Western Transbaikalia, Russia) features industrial reserves of rare kurchatovite-sakhaite ores. The purpose of the work is to study the oxygen isotopic composition of boron-bearing minerals from the kurchatovite-sakhaite ores of the deposit. The samples were studied using modern methods of electron microscopy, mass spectrometry. The original photographs of transparent thin sections and images of the samples in backscattered electrons show mineral associations of sakhaite and kurchatovite icluding polymineral szaibeliite-sibirskite-calcite aggregate, roweite, fedorovskite, ludwigite, forsterite, serpentine, titanite, sphalerite, magnetite, jacobsite, apatite, turneaureite. The evolution of the Solongo deposit boron minerals is described. The following indicators of the oxygen isotopic composition δ18О v-SMOW in minerals have been obtained: sakhaite – +1 ‰, roweite – +2.7 ‰, kurchatovite – +1.9 ‰, magnetite – -0.3 ‰. The comparison of isotopic data on sakhaite with the available literature data has shown that the sakhaite of Solongo boron ores has a relatively light oxygen composition. The indicators obtained are attributed to the participation of meteoric waters including melt waters of firn basins and permafrost, in the formation process of the deposit, as well as reduced index of the oxygen isotope composition δ18O of the dolomites of the Ozerninsky ore cluster, whose transformation is associated with the sakhaite formation.
About the Authors
S. Yu. Izbrodina
Dobretsov Geological Institute, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Svetlana Yu. Izbrodina, Engineer of the Laboratory of Metallogeny and Ore Formation, Dobretsov Geological Institute
Ulan-Ude
V. F. Posokhov
Dobretsov Geological Institute, Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Viktor F. Posokhov, Senior Researcher of the Laboratory of Instrumental Methods of Analysis, Dobretsov Geological Institute
Ulan-Ude
References
1. Malinko S. V., Lisitsyn A. E., Dorofeeva K. A., Ostrovskaya I. V., Shashkin D. P. A new mineral kurchatovite. Zapiski Vsesoyuznogo mineralogicheskogo obshchestva.1966;95(2):203-209. (In Russ.).
2. Malinko S. V. A new boron mineral – solongoite. Zapiski Vsesoyuznogo mineralogicheskogo obshchestva. 1974;103(1):117-121. (In Russ.).
3. Malinko S. V., Shashkin D. P., Yurkina K. V. Fedorovskite as a new mineral of boron and as an isomorphic series of roweite. Zapiski Vsesoyuznogo mineralogicheskogo obshchestva. 1976;105(1):71-85. (In Russ.).
4. Simonov M. A., Malinko S. V., Belov N. V., Kazanskaya E. V., Egorov-Tismenko Yu. K., Fe-dorenko M. B., et al. New mineral hexahydroborite Са[В(ОН)4]2·2Н2О. Zapiski Vsesoyuznogo mineralogicheskogo obshchestva. 1977;106(6):688-691. (In Russ.).
5. Chukanov N. V., Pekov I. V., Malinko S. V., Zadov A. E., Dubinchuk V. T. A new mineral vitimite Ca6B14O19[SO4](ОН)14·5H2O and its formation conditions at the Solongo deposit (Buryatia). Zapiski Vserossiiskogo mineralogicheskogo obshchestva. 2002;131(4):41-47. (In Russ.).
6. Malinko S. V., Chukanov N. V., Dubinchuk V. T., Zadov A. E. A new mineral buryatite Ca3(Si,Fe3+,A1)[SO4] [B(OH)4](OH) 5O∙12H2O. Zapiski Vserossiiskogo mineralogicheskogo obshchestva. 2001;130(2):72-78. (In Russ.).
7. Gordienko I. V., Bulgatov A. N., Ruzhentsev S. V., Minina O. R., Klimuk V. S., Vetluzhskikh L. I., et al. The late riphean-paleozoic history of the Uda-Vitim Island Arc System in the Transbaikalian sector of the Paleoasian Ocean. Geologiya i geofizika. 2010;51(5):589-614. (In Russ.).
8. Izbrodina S. Yu., Khubanov V. B. The role of granitization in the formation of the Solongo magnesian-skarn iron-boron deposit (Ozerninsky ore cluster, Republic of Buryatia). In: Novoe v poznanii protsessov rudoobrazovaniya: sb. tr. X Ros. molodezhn. nauch.-prakt. shkoly s mezhdunar. uch. = New in ore formation processes perception: Collected works of the 10th Russian youth scientific and practical school with international participation. 29 November – 3 December 2021, Moscow. Moscow: Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences; 2021, p. 116–119. (In Russ.).
9. Lisitsyn A. E., Vinogradov B. K., Malinko S. V. Skarns of the Solongo deposit in Buryatia and their ore content. Sovetskaya geologiya. 1974;3:116-123. (In Russ.).
10. Malinko S. V., Lisitsyn A. E. Exotic boron ores from the Solongo deposit in Buryatia. Rudy i metally = Ores and Metals. 1997;5:63-71. (In Russ.).
11. Aleksandrov S. M. Genesis and composition of ore-forming magnesian borates, their analogues, and modifications. Geokhimiya. 2003;5:492-512. (In Russ.).
12. Pankova Yu. A., Krivovichev S. V., Pekov I. V., Grew E. S., Yapaskurt V. O. Kurchatovite and clinokurchatovite, ideally CaMgB2O5: an example of modular polymorphism. Minerals. 2018;8(8):332. https://doi.org/10.3390/min8080332.
13. Aleksandrov S. M. Borates of the sakhaiteharkerite series at magnesian skarn deposits in the northeast of Russia: genesis and isomorphism. Geokhimiya. 2005;9:966-989. (In Russ.).
14. Sharp Z. D. A laser-based microanalytical method for the in situ determination of oxygen isotope ratios of silicates and oxides. Geochimica et Cosmochimica Acta. 1990;54(5):1353-1357. https://doi.org/10.1016/0016-7037(90)90160-M.
15. Marincea S., Dumitraş D.-G. Contrasting types of boron-bearing deposits in magnesian skarns from Romania. Ore Geology Reviews. 2019;112:102952. https://doi.org/10.1016/j.oregeorev.2019.102952.
16. Evans R. J., Groat L. A., Cempirek J., Škoda R., Grew E. S., Bernard C. The crystal chemistry of the sakhite-harkerite solid solution. American Mineralogist. 2018;103(11):1749-1760. https://doi.org/10.2138/am-2018-6563.
17. Aleksandrov S. M. Geochemistry of skarn and ore formation in dolomites. Moscow: Nauka; 1990. 343 p. (In Russ.).
18. Aleksandrov S. M. Endogenous transformations of kotoite in calciphyres at magnesian-skarn deposits of boron. Geokhimiya. 2007;7:733-752. (In Russ.).
19. Nekrasov I. Ya., Malinko S. V. Experimental study of sakhaite formation conditions. Doklady Akademii nauk SSSR. 1973;210(6):1427-1430. (In Russ.).
20. Aleksandrov S. M., Malinko S. V. Geochemical features of endogenous and exogenous changes in borate carbonates. Geokhimiya. 1975;1:3-16. (In Russ.).
21. Malinko S. V., Chukanov N. V. Arsenate analogs of apatite –turneaureite and johnbaumite from the Solongo deposit, Buryatia. Zapiski Vserossiiskogo mineralogicheskogo оbshchestva = Proceedings of the All-Russian Mineralogical Society. 1998;3:92-95. (In Russ.).
22. Nabelek P. I. Stable isotope monitors. In: Kerrick D. M. (ed.). Contact metamorphism. Berlin – Boston: De Gruyter; 1991, p. 395–435.
23. Hoefs J. Stable isotope geochemistry. Berlin:Springer; 2009. 285 p.
24. Kovalev K. R., Ripp G. S., Distanov E. G., Baulina M. V. FE-Mg carbonates and variations in isotopic compositions of carbon and oxygen at the Ozernoe hydrothermalsedimentary pyrite-polymetallic deposit (Transbaikalia). Geologiya i geofizika. 2005;46(4):383-397. (In Russ.).
Review
For citations:
Izbrodina S.Yu., Posokhov V.F. Oxygen isotopic composition of boron minerals from kurchatovite-sakhaite ores of the Solongo deposit. Earth sciences and subsoil use. 2022;45(2):104-118. (In Russ.) https://doi.org/10.21285/2686-9993-2022-45-2-104-118
Views:
260
Email this article 
Post a Comment 
