The role of mantle processes in the formation of commercial endogenous uranium deposits on the example of the Ukrainian shield
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- Category: Geological sciences
- Last Updated on Thursday, 04 June 2015 11:30
- Published on Sunday, 29 March 2015 11:50
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Authors:
A.А. Kalashnik, Dr. Sci. (Geol.), State Enterprise “Kirovgeologiya”, Exploration expedition № 37, Chief Geophysicist, Kirovograd, Ukraine
Abstract:
Purpose. To determine new regularities of formation of commercial endogenous uranium deposits of the Ukrainian shield based on the study of deep lithosphere parameters variability that predetermine the appearance of conditions suitable for formation of specialized uranium mantle fluid flows resulting in uranium deposits on the upper floors of the crustal structure which consist of the mantle ore components. This is needed to improve the methodology and results of the forecast of commercial uranium deposits, primarily with large reserves, and to raise the effectiveness geological exploration.
Methodology. We have analyzed large amounts of geophysical, geological, and radioactivity geochemical data concerning the peculiarities of formation and conditions of localization of commercial uranium deposits in the Ukrainian shield (UkrSh) taking into account the peculiarities of the deep structure of the lithosphere and asthenosphere, fault tectonics, mantle magmatism. We have used the results of modern petrological, isotopic geochemical studies.
Findings. We have determined the depth factors of formation of commercial uranium deposits of endogenous class located in the Ukrainian shield. Their effectiveness has been proved by practical results of specialized studies on uranium at drilled-up well-studied areas of the Ukrainian shield. Isotopic and geochemical data proves the mantle nature of the solutions that formed sodium uranium ore metasomatic rocks. This gives us the opportunity to exercise science estimates of potential uranium-ore productive lithosphere segments of the Ukrainian shield and significantly minimize areas for further exploration works.
Originality. As opposed to traditional notions, we have determined that mantle sources of uranium ore-formation components and peculiarities of the lithosphere deep structure are of crucial importance for the formation of commercial uranium endogenous deposits in the Ukrainian shield. As they cause uranium mantle fluid flows resulting in uranium deposits formation on the upper floors of the crustal structure from mantle ore components.
Practical value. New laws of occurrence of commercial endogenous uranium deposits have been discovered based on the modern ideas about metallogenesis of uranium with primary initial stage of concentration of uranium-ore components in the mantle under certain PT-conditions. They reflect the specific formation of endogenous uranium mineralization. This made it possible to scientifically substantiate promising territories of formation of industrial uranium deposits with determination of the most probable areas of their localization.
References:
1. Abramovich,I.I. Metallogeniya (2010), [Metallogeny], GEOKART-GEOS, Moscow, Russia.
Абрамович И.И. Металлогения / Абрамович И.И. – М.: ГЕОКАРТ-ГЕОС, 2010. – 328 с.
2. Belevtsev, Ya.N., Koval, V.B. and Bakarzhiev, A.Kh. (1995), Geneticheskiye tipy i zakonomernosti razmeshcheniya uranovykh mestorozhdeniy Ukrainy [Genetic Types and Regularities of Location Uranium Deposits of Ukraine], Naukova Dumka, Kiev, Ukraine
Генетические типы и закономерности размещения урановых месторождений Украины / [Белевцев Я.Н., Коваль В.Б., Бакаржиев А.Х. и др.]; под ред. Я.Н. Белевцева, В.Б. Коваля. – К.: „Наукова думка“, 1995. –376 с. .
3. Plant, J., Simpson, P. and Smith, B. (1999), “Uranium ore deposits: Product of Radioactive Earth”, Uranium Mineralogy Geochemistry and the Environment, Rev. Mineral, Vol.38, pp. 255–320.
4. Kalashnyk, G.A. (2009), “The relations of uranium ore formation and ultra-basic magmatism within Lelekovskoe and Michurinskoe uranium-ore fields of the Kirovograd block of the Ukrainian Shield”, Mineralni Resursy Ukrainy, no. 4, pp. 18–21.
Калашник А.А. Связь уранового рудообразования и проявлений щелочно-ультраосновного магматизма в пределах Лелековского и Мичуринского урановорудных полей Кировоградского блока УЩ / А.А. Калашник //Мін. ресурси України. – 2009. – № 4. – С. 18–21.
5. Krupennikov, V.A. (2008),“Mantle alkaline fluid-magmatic petrogenezis as the main ore-forming process”, Proc. of the 2nd Int. Symposium “Uranium Resources, Production”, November 26-28, 2008, Publishing House of FSUE VIMS, Moscow, pp. 28–31.
Крупенников В.А. Мантийный щелочной флюидно-магматический петрогнезис как основной рудообразующий процесс: матер. II Межд. симпозиума „Уран–ресурсы, производство“ (Москва 26–28 ноября 2008 г.) / В.А. Крупенников // – М.: Из-во ФГУП ВИМС. – С. 28–31.
6. Letnikov, F.A. (1999), “The fluid facies of the continental lithosphere and problems mineralization”, Vestnik OGGN RAS, no.4 (10), pp. 25.
Летников Ф.А. Флюидные фации континентальной литосферы и проблемы рудообразования / Ф.А. Летников // ВестникОГГН РАН. – 1999. – № 4 (10). – 25 с.
7. Stepaniuk, L.M., Bondarenko, S.M. and Somka, V.O. (2012), “Source of sodium and uranium in uranium-bearing albitites, the example of Dokuchaievsk field Ingulsky megablock of the Ukrainian Shield”,Abstracts of Scientific Conference “Theoretical Issues and Research of Metasomatic Rocks and Ore”, Kyiv, March 14–16, 2012), IGMO, pp. 78–80.
Степанюк Л.М. Джерело натрію та урану ураноносних альбітитів на прикладі Докучаєвського родовища Інгульського мегаблоку УЩ: тези доповідей наукової конференції „Теоретичні питання і практика дослідження метасоматичних порід і руд“, (Київ 14–16 березня 2012 р.)/ Л.М. Степанюк, С.М. Бондаренко, В.О. Сьомка //ИГМР. – 2012. – С. 78–80.
8. Tyapkin, K.F. (2013), “Evaluation of the new rotational hypothesis of the Earth’s tectonosphere structure formation from the perspective of dialectical materialism”, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no.1, pp. 11–24.
Тяпкин К.Ф. Оценка новой ротационной гипотезы в тектоносфере Земли с позиций диалектического материализма / К.Ф.Тяпкин // Науковий вісник НГУ. – 2013. –№1. – С.11–24.
9. Fedoryshyn, Yu.I., Fesenko, O.V. and Deneha, O.B. (2006), “The spatial model of the deep structure of the lithosphere of the Ukrainian shield at the prospect of industrial diamond”, Mineralni Resursy Ukrainy, no. 3, pp. 8–12.
Федоришин Ю.І. Просторова модель глибинної будови літосфери Українського щита у зв’язку з перспективами промислової алмазоносноcті / Ю.І. Федоришин, О.В. Фесенко, О.Б. Денега // Мін. ресурси України. – 2006. – № 3. – С. 8–12.
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