Geochronology of the Vatutinka uranium deposit (Ingul megablock of the Ukrainian Shield)

Stepanyuk, L.M.; Bondarenko, S.M.; Yvanov, B.N.; Dovbush, T.; Kurylo, S.I.; Semka, V.O.; Shestopalova, E. E.

doi:10.15407/gof.2014.34.018

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Most granites of Ingul megablock (Ukrainian shield) and vein varieties closely associated with them are not so different in age of their formation. Early published data (Stepanyuk et al, 2005;2012;2014;2015a,b;2016) and results of new dating discussed in this paper indicate rather narrow age interval, 2040-2020 Ma, of formation of most granite varieties (Novoukrainka, Dolinsky, Voznesensky, Lysogirsky, Berezivsky massifs) distributed within Ingul megablock. At the same time, there are also many field evidences found that can testify for gradual transition between rare metal pegmatites and aplite-pegmatitic granites.…”

Section: Notes: 1-4 -Size Fractions Of Crystals Selected By Rolling Amentioning

confidence: 57%

“…Aplite-pegmatitic granite is rock that is pink-gray in colour. It includes such minerals (%) as plagioclase (30-35), microcline (about 30), quartz (30-32), biotite (6)(7)(8) Monazites occur as light yellow, transparent (about 2 %), yellow and brownish-yellow semitransparent (about 98%), greenish-yellow opaque (single grains) crystals of rounded shape. Light yellow crystal are very small in size (<0.04 mm) characterized by cake-like morphology and smooth lustrous surfaces.…”

Section: Notes: 1-4 -Size Fractions Of Crystals Selected By Rolling Amentioning

confidence: 99%

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Geochronology of Lithium-Bearing Granitoids of Ingul Megablock (Ukrainian Shield)

Stepanyuk¹,

Hrinchenko

Slobodian³

et al. 2018

VKNUGEOL

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Rare-metal elements are strategic metals which, in general, are extremely important for economic development or maintenance of defence capability of any country at the modern level. The list of needs for these strategic metals ranges depending on the level of economic development of certain country, but in general it includes such elements as Li, Ta, Nb, Be, Sb, W, REE and others. The majority of these elements has the lithophilous nature and, therefore, is characterized by close genetic relations with granites and pegmatites associated with them. In the world, industrial production of lithium is shared between deposits to lithium-bearing brine of saline depositions of marine basins (Argentina, Chile), some granites (China) and rare-metal pegmatites (Australia, China, Zimmbabve). In pegmatites lithium mineralization is represented mainly by spodumene (LiAlSi2O6), But other lithium-containing metallic minerals can also play an important role in production of this metal – petalite (LiAlSi4O10), minerals of lepidolite (Sa [Li,Al]3[Si,Al]4O10[F,OH]2) and amblygonite-montebrasite (LiAlPO4 [F,OH]) series. Rare-metal pegmatite of Ingul megablock of Ukrainian Shield can be treated as unique (insufficiently studied in world practice) pegmatitic formations in which the main metallic mineral is represented by petalite. In metallogenic interpretations two ore districts can be distinguished within the megablok, that are specialized on rare metals (Li, Rb, Cs, Be, Ta, Nb, Sn) – Polohivka and Stankuvatka. Deposits and numerous ore manifestations of rare metals formed in rather similar geological and tectonic conditions and have many common features – both country rocks composition and mineralogic composition of ores. Within Ingul megablock (Shpola-Tashlyk rare-metal district) a number of lithium rare-metal deposits associated with pegmatites is discovered. In order to determine the age of lithium mineralization in granites of Lypniazhka, Taburyshche massifs and vein bodies of pegmatitic and aplito-pegmatitic granites, which are selected from different localities of this megablock, are dated by U-Pd isotopic method by monazites. It is established that emplacement of vein granites of Ingul megablock occurred within rather narrow age interval – 2040-2020 Ma and it is not significantly separated in time from formation of most granitoids they are spatially associated with. This fact, together with geological evidences, gives grounds to make the assumption that rare-metal lithium pegmatite are formed in the same age interval.

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Section: Notes: 1-4 -Size Fractions Of Crystals Selected By Rolling Amentioning

confidence: 57%

Section: Notes: 1-4 -Size Fractions Of Crystals Selected By Rolling Amentioning

confidence: 99%

Geochronology of Lithium-Bearing Granitoids of Ingul Megablock (Ukrainian Shield)

Stepanyuk¹,

Hrinchenko

Slobodian³

et al. 2018

VKNUGEOL

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Mineralogical and geochemical features of bismuth in Proterozoic ore-bearing structures of west part of the Ingul megablok (Ukrainian shield)

Bondarenko¹,

Syomka²,

Stepanyuk³

et al. 2020

Geohim. rudoutvorennâ

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In this paper we summarize the geological information about regional distribution features of bismuth in the Ingul megablok of Ukrainian shield. Different Proterozoic ore sites situated within the Bratsk-Zvenihorodka and the Ingul-Tyasmyn metallogenic zone are considered. They are characterized by the presence of various scale deposits of uranium, rare metals (Li, Rb, Cs, Ta, Nb, W, Sn) and precious metals (Au, Ag). Minerals-concentrators of bismuth and main paragenetic associations comprising native Bi, tellurides, bismutite, maldonite, wittichenite, parkerite, matildite are investigated. It should be noted that within the intrusions of the Korsun-Novomyrgorod pluto and the Novoukraika massif, which spatially separate the Bratsk-Zvenihorodka and the Ingul-Tyasmyn metallogenic zone, there are also deposits of uranium and titanium, but bismuth is practically absent. At a relatively low content (from 5 to 60 g / t) bismuth is a typical metal for ore objects of K-U formation and rare metal pegmatites of Polokhiv and Stankuvatske ore fields. For the first time, mineral forms of bismuth (native bismuth, Pb-bismuth, galenobismuthin) were determined in the Obginnyi ore occurence, where abnormally high content values of bismuth up to 0,8-1,3%. The geochemical feature of numerous gold ore objects is the almost complete dominance of bismuth compounds with tellurium. There are headleite (Ві7Те3), telluric bismuthite (Ві2Те3), tsumoit (ВіТе), pilsenite (Ві4Те3), joseite-B (Bi4(S,Te)3) detected individualized phases in the Bi-Te system. In the skarns of the Bandurkivsky ore occurence the early productive association consists of maldonite + joseite-B + tetradimite, and the late one consists of native gold + bismuth. Bismuth sulfosalts are present in various ore objects as part of sulfide Cu-Ag-Bi and Pb-Ag-Bi mineralization. The study of geochemistry and mineralogy of bismuth was performed in M.P. Semenenko institute of geochemistry, mineralogy and ore formation of NAS of Ukraine, using a scanning electron microscope JSM-6700F (JEOL). Data on the chemical composition of minerals were obtained using microprobe devices JCXA-733, JXA-8200 (Technical Center of the National Academy of Sciences of Ukraine) and Cameca SX-100 (Technical University, Klausstal (Germany)). The data of spectral and atomic absorption analysis of the central laboratory of KP «Kirovgeologiya» were also used in writing the article.

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Uranium-Lead Age of Granites of Kirovohrad Massif of the Inhul Megablock of the Ukrainian Shield

Stepanyuk¹,

Konoval²,

Dovbush³

et al. 2021

Mìneral. ž.

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The porphyry-like biotite-garnet granites (sample KВ-5-1) of the Sokolivkа quarry were studied. The quarry is located in the Kirovohrad granite massif on the southwest of Kropyvnytsky city. The aim of our geochronology investigation is to determine the age of granites of the Kirovohrad massif by the U-Pb isotope method using monazite. The age of granites from Kirovohrad massif by the U-Pb method using monazite has not been determined yet. According to our data, the porphyry granites of the Kirovohrad massif (Sokolivkа quarry) were formed 2034 million years ago. This U-Pb data of the porphyry-like granites is significantly lower than the U-Pb age of the granites from other parts of this massif. This may be due to the multistage formation of the Kirovohrad massif, for example, the Novoukrainskiy and some granite massifs of the Zhytomyr complex from Volyn’ megablock.

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Geochronology of the Vatutinka uranium deposit (Ingul megablock of the Ukrainian Shield)

Cited by 3 publications

References 2 publications

Geochronology of Lithium-Bearing Granitoids of Ingul Megablock (Ukrainian Shield)

Geochronology of Lithium-Bearing Granitoids of Ingul Megablock (Ukrainian Shield)

Mineralogical and geochemical features of bismuth in Proterozoic ore-bearing structures of west part of the Ingul megablok (Ukrainian shield)

Uranium-Lead Age of Granites of Kirovohrad Massif of the Inhul Megablock of the Ukrainian Shield

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