Composition оf Тa-Nb mineralization in pegmatites and apogranitic metasomatites of Shpoliano-Tashlyk ore field

Grinchenko, O.; Bondarenko, S.M.; Siomka, V.O.; Иванов, Б. Н.; Kanunikova, L.I.

doi:10.15407/gof.2016.36.047

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…This paper describes the Stankuvatske Li-deposit from the western part of the Inhul Domain of the Ukrainian Shield, which contains petalite and spodumene rare-element granitic mineralisations. To date, numerous Li-rich dykes have been discovered in this region by borehole prospecting (e.g., Nechaev et al, 1991;Nechaev and Syomka, 2012;Eremenko et al, 1996;Vozniak et al, 2000Vozniak et al, , 2001Ivanov and Lysenko, 2001;Ivanov et al, 2011;Hrinchenko et al, 2016;Bondarenko et al, 2019). However, very few data on this Li-mineralisation are available.…”

Section: Introductionmentioning

confidence: 99%

“…To date, numerous Li-rich dykes have been discovered in this region by borehole prospecting (e.g. Nechaev et al , 1991; Nechaev and Syomka, 2012; Eremenko et al , 1996; Vozniak et al , 2000; Vozniak and Pavlyshyn (2001); Ivanov and Lysenko, 2001; Ivanov et al , 2011; Hrinchenko et al , 2016; Bondarenko et al , 2019). However, very few data on the Li-mineralisation are available.…”

Section: Introductionmentioning

confidence: 99%

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Fine-grained petalite and spodumene dykes in the Stankuvatske Li-deposit, Ukrainian Shield: products of tectono–metamorphic recrystallisation

Kurylo

Uher

Broska

et al. 2022

MinMag

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The Paleoproterozoic (~2.0−1.8 Ga) Stankuvatske Li deposit (Ukrainian Shield, Central Ukraine) represents an uncommon case of recrystallised, fine-grained petalite  spodumene metapegmatite dykes with LCT affinity hosted in amphibolites and metaultrabasic rocks. The metapegmatite dykes show remnants of primary, pre-metamorphic zoning, with dominant magmatic albite, Kfeldspar, quartz, Li-phases (petalite, spodumene, rarely triphylite, and montebrasite), and accessory muscovite, fluorapatite, columbite-(Fe), tantalite-(Fe), cassiterite, Ta-rich rutile, zincoand ferronigerite, gahnite, pyrite, sphalerite, and zircon. The parental magma of the investigated metapegmatites was peraluminous, and enriched in Li and P but relatively poor in B and F during

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fine-grained petalite and spodumene dykes in the Stankuvatske Li-deposit, Ukrainian Shield: products of tectono–metamorphic recrystallisation

Kurylo

Uher

Broska

et al. 2022

MinMag

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Geochemistry of Nb and Та in magmatic rocks of the Ukrainian Shield

Kryvdik¹,

Dubyna²

2020

Geohim. rudoutvorennâ

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It was made an attempt to generalize geochemical data of Nb and Ta concentration in the most common igneous rocks of the Ukrainian Shield (USh). In the majority of widely distributed rocks of the USh (normal and subalkaline granitoids) the Nb and Ta concentration are similar to upper crust but lower the accepted Clark value for acidic rocks. In the more differentiated rapakivi granites concentrations of these elements reach or exceed the Clark’s concentrations (up to 35 ppm). Only highly differentiated alkaline rocks and alkaline feldspar granites (Perga, Kamiani mogyly, Ruska Poliana massifs) have high Nb concentrations (up to 800, 120 and 370 ppm, respectively). Medium rocks of the normal range are the least geochemically studied and typically are characterized low Nb and Ta concentrations. Almost all gabbroids as well as their metamorphosed analogues in the greenstone structures, are characterized by very low Nb (and Ta) concentration (two or more orders of magnitude) compared with Clark’s values for basic rocks (20 ppm Nb and 0.48 ppm Ta) according to A.P. Vinogradov. Against this background, increased of Nb and Ta concentration is observed in the main rocks of anorthosite-rapakivi-granite plutons. Howover even in these rocks concentration of these elements rarely reach or does not achieve the values which are typical for subalkaline and alkaline basalts of continental rifts. The regional heterogeneity in Nb and Ta distribution is observed in alkaline rocks of different composition: in the Azov Sea region these rocks are characterized by high concentrations, while in the western part of the USh the content of these elements is extremely low. The increased concentration of these elements is also revealed in kimberlites from the Azov Sea region and the Kyrovohrad megablock of the USh. The authors give some considerations and assumptions about the dependence on geochemical features of the Precambrian igneous rocks of the USh from the geodynamic conditions of their formation.

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Ta-Nb mineralization in rare-metal pegmatite from north-western frame of Lypniazhka granite-migmatite structure

Kurylo¹,

N.²,

Bondarenko³

et al. 2020

Geohim. rudoutvorennâ

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The three type of rare-metal pegmatites are know in Stankuvatske ore field (Ingul megablock, the Ukraianian Shield), such as: Li-bearing, Bi-As-U and Ta-Nb pegmatites. For the first time Ta-Nb mineralisation from Ta-Nb bearing albite-K-Feldspar rare metal pegmatite have been described. Investigated pegmatite is located on the Norh-West frame of the Lypnazky granitemigmatite massive among hosted amphibolites. Rare-metal pegmatite doesn’t have obvious zonality and consist of alkaline feldspar, biotite, muscovite, dark to black colour quartz, blue-greenish apatite, nigerite, gachnite, tourmaline, monazite. The primary ferrocolumbite and Nb-rutile-II have undergone strong hydrothermal alteration. Thus primary rutile-II decomposed with formation of skeletal intergrowths of secondary cassiterite and rutile-III with a much lower volume of Nb and Ta under the influence of hydrothermal fluid. Primary homogenous Nb-rutile-I (Nb2O5+Ta2O5 from 33,5 to 42,9 wt.%) exsolved a fine trellis-like pattern and lamellar of Nb-pure rutile-III, cassiterite and Mn-rich ilmenite. The Nb-rutile-II is occurred in tabular grains with unclear internal zonation. Primary ferrcolumbite breakdown to Ti-ixiolite and Nb-rutile-III. Primary oscillatory zonality is transformed into irregularly patchy and veinlety. Recrystallized ferrotantalite is secondary and uncommon mineral. Ferrocolumbite contains 2.93 to 4.74 wt.%TiO2, and titanian ixiolite 7,33-10,76 wt.%. The (Ti,Nb)>Ta mineral assemblages, and compositional trend of columbite with very low Ta/(Ta+Nb) and Mn/ (Mn+Fe) imply a general low level of fractionation in comparison with typical beryl-columbite rare-metal pegmatites.

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Composition оf Тa-Nb mineralization in pegmatites and apogranitic metasomatites of Shpoliano-Tashlyk ore field

Cited by 3 publications

References 5 publications

Fine-grained petalite and spodumene dykes in the Stankuvatske Li-deposit, Ukrainian Shield: products of tectono–metamorphic recrystallisation

Fine-grained petalite and spodumene dykes in the Stankuvatske Li-deposit, Ukrainian Shield: products of tectono–metamorphic recrystallisation

Geochemistry of Nb and Та in magmatic rocks of the Ukrainian Shield

Ta-Nb mineralization in rare-metal pegmatite from north-western frame of Lypniazhka granite-migmatite structure

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