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

2021 ◽  
Vol 43 (4) ◽  
pp. 56-62
Author(s):  
L.M. STEPANYUK ◽  
N.M. KONOVAL ◽  
T.I. DOVBUSH ◽  
O.V. KOVTUN ◽  
O.B. VYSOTSKY ◽  
...  
Keyword(s):  
Ukrainian Shield ◽  
Pb Isotope ◽  
Granite Massif ◽  
Isotope Method

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.

scholarly journals STRUCTURAL AND MORPHOLOGICAL FEATURES OF VERBA MOLYBDENUM ORE MINERALIZATION

2018 ◽  
pp. 15-19
Author(s):  
M. M. Kostenko ◽  
P. A. Kondratenko
Keyword(s):  
Internal Structure ◽  
Complex Structure ◽  
Morphological Features ◽  
Ukrainian Shield ◽  
Granite Massif ◽  
South Eastern ◽  
Ore Minerals ◽  
Ore Mineralization ◽  
Mineralized Zone ◽  
Native Bismuth

The article shows the Verba ore mineralization of molybdenum (Volyn Block of the Ukrainian Shield) is associated with small granite intrusions. They are located in the south-eastern exocontact zone of the Ustynivka granite massif of the Paleoproterozoic Chisinau complex. The Verba minera­lization is a linear-coarse mineralized zone of the complex structure. This is confirmed by the development in its rocks of frequent, non-orientated veins of quartz, fluorite-quartz and carbonate-quartz compositions and numerous cracks. They have molybdenite and concomitant mineralization, as well as the wide spreading of molybdenite inclusions directly in the granites. A number of differently oriented faults and of small fracturing local zones, cataclasite, millonitized and breccias represents the internal structure of the mineralized zone. The characteristic of molybdenite the leading ore minerals is shown. It is morphologically represented by a closely connected scattered inclusions, rarely veined inclusions, and associated ore minerals: cassiterite, bismuth, native bismuth, emlectocytes, galena, sphalerite, chalcopyrite, pyrite, ilmenite, magnetite and titanomagnetite.

scholarly journals Uranium-Lead Geochronology on Monacite of Granites of the Lypnyazka Massif and its Framing (Ingul Megablock of the Ukrainian Shield)

2021 ◽  
pp. 71-79
Author(s):  
L.M. Stepanyuk ◽  
◽  
S.I. Kurylo ◽  
V.O. Syomka ◽  
T.I. Dovbush ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Ukrainian Shield ◽  
Upper Crust ◽  
Isotopic Dating ◽  
Granite Massif ◽  
Rare Elements ◽  
The Village

The Lipnyazka massif is located in the Dobrovelychkivsky district of the Kirovohrad region, v. Lipnyazka and further south. Structurally, it is located within the Bratskyy Synclinorium of the Ingul megablock and coincides with the Mikhailovsky anticline. The main petrotype of the massif rocks are porphyry-like granites, often with a gneiss-like texture, aplito-pegmatoid, pegmatoid granites and pegmatites. The latter most often form secant vein bodies. Uranium-lead isotopic dating of granitoids of the Lipnyazka granite massif has been performed, with which a number of deposits and ore occurrences of rare elements, primarily lithium, are spatially and probably genetically connected. The age of porphyry-like granites (2032 ± 6 million years), which is the main petrotype of rocks distributed in the area of the village of Limestone and pegmatoid granites (2027 ± 1 million years), which cut porphyry-like in the form of vein bodies. Aplithoid framed granites (2046 ± 8 million years old), common in the area of the mouth of the Sukhyi Tashlyk River (Dobryanka village), are somewhat older. Based on the results of determining the isotopic composition of strontium in the accessory apatite of granites, a conclusion was made about the upper crust source of granites of the Lipnyazka massif (87Sr/86Sr – 0.730-0.785).

scholarly journals SHRIMP U-Th-Pb zircon dating of the granitoid massifs in the Malé Karpaty Mountains (Western Carpathians): evidence of Meso-Hercynian successive S- to I-type granitic magmatism

2009 ◽  
Vol 60 (5) ◽  
pp. 345-350 ◽  
Author(s):  
Milan Kohút ◽  
Pavel Uher ◽  
Marián Putiš ◽  
Martin Ondrejka ◽  
Sergey Sergeev ◽  
...  
Keyword(s):  
Granitic Rock ◽  
Granitic Rocks ◽  
Western Carpathians ◽  
Pb Isotope ◽  
Zircon Dating ◽  
Rock Samples ◽  
Isotope Method ◽  
Granitic Magmatism

SHRIMP U-Th-Pb zircon dating of the granitoid massifs in the Malé Karpaty Mountains (Western Carpathians): evidence of Meso-Hercynian successive S- to I-type granitic magmatismRepresentative granitic rock samples from the Malé Karpaty Mountains of the Western Carpathians (Slovakia) were dated by the SHRIMP U-Th-Pb isotope method on zircons. Oscillatory zoned zircons revealed concordant Mississippian magmatic ages: 355±5 Ma in Bratislava granodiorite, and 347±4 Ma in Modra tonalite. The results document nearly synchronous, successive Meso-Hercynian plutonic events from S-type to I-type granites. The Neo-Proterozoic inherited zircon cores (590±13 Ma) were identified in the Bratislava S-type granitic rocks whereas scarce Paleo-Proterozoic inherited zircons (1984±36 Ma) were detected within the Modra I-type tonalites.

EFFECT OF HEPARIN ON THE CORTICOSTERONE SECRETION RATE WITH A DESCRIPTION OF THE DOUBLE ISOTOPE METHOD USED

1967 ◽  
Vol 56 (1_Suppl) ◽  
pp. S140 ◽  
Author(s):  
A. F. Casparie ◽  
Th. J. Benraad ◽  
P. W. C. Kloppenborg ◽  
C. L. H. Majoor
Keyword(s):  
Secretion Rate ◽  
Isotope Method ◽  
Corticosterone Secretion ◽  
Double Isotope

The final stage of granitoid magmatism in the Dniester-Bug megablocks Ukrainian shield

2016 ◽  
Vol 36 ◽  
pp. 72-81 ◽  
Author(s):  
L.M. Stepaniuk ◽  
◽  
T.Y. Dovbush ◽  
S.Y. Kurylo ◽  
Y.M. Lesnaya ◽  
...  
Keyword(s):  
Final Stage ◽  
Ukrainian Shield ◽  
Granitoid Magmatism

New Findings of Rare Minerals in Alkaline Rocks of Ukrainian Shield

2020 ◽  
Vol 42 (4) ◽  
pp. 3-22
Author(s):  
V.V. SHARYGIN ◽  
S.G. KRYVDIK ◽  
O.V. DUBYNA
Keyword(s):  
Rare Earth ◽  
Chemical Composition ◽  
Ukrainian Shield ◽  
Silicate Mineral ◽  
Alkaline Rocks ◽  
First Finding ◽  
Azov Region ◽  
New Findings ◽  
Oxide Minerals

Over recent years, new rare minerals have been discovered in the alkaline rocks of the Ukrainian Shield. Agpaitic varieties of alkaline magmatic and metasomatic rocks turned out to be especially abundant in rare minerals. Numerous findings are related to alkaline metasomatites which are considered to be fenites and apofenite albitites of the Dmytrivka quarry. It is well known primarily by the presence of various accessory (Nb, REE, and Zr) minerals, as well as silicate and oxide minerals that are rare for Ukraine. The most common albite microcline fenites of this quarry are characterized by rare-earth mineralization, whereas the concentration of REE decreases in apofenite albitites and Zr and Nb increase. New rare minerals were also found in the essentially albite rock with astrophyllite, alkaline pyroxene and amphibole of the Malatersa massif and agpaitic phonolites of the Oktyabrsky massif. In the rocks of the mentioned massifs and occurrences of alkaline rocks the most interesting are the findings of the perraultite — jinshajiangite series. They were found in three points of the Azov area and include 1) perraultite and jinshajiangite in the alkaline metasomatites of the Dmytrivka quarry; 2) only perraultite in agpaitic phonolites of the Oktyabrsky massif (Kam’yana gully); 3) jinshajiangite in a veined albite rock among the gabbro of the Malatersa massif. Baotite and minerals of the hejtmanite — bafertisite series were also found in the metasomatites of the Dmytrivka quarry. The latter belong to intermediate varieties in terms of MnO (10-17 wt.%) and FeO (10-17 wt.%) which distinguishes them from Fe-rich bafertisite from other regions. A silicate mineral with high content of Na, Zr, Mn and elevated Ti and Nb is rarely observed as small inclusions in the kupletskite grains from alkaline metasomatite of the Dmytrivka quarry. According to the chemical composition it was previously diagnosed as janhaugite. Tainiolite was found in some occurrences of alkaline metasomatites in the Azov region. In addition small aggregates of the REE-enriched epidote were found in fenites of the Kaplany village, which is probably the first finding in Ukraine. Two new Zr minerals have been found in the aegirine syenites of the Korsun-Novomyrhorod pluton: elpidite and mineral with a high content of Y2O3 (13-14 wt.%) (Y-hagatalite ?).

Scarn Gold Mineralization of the Bandurka Ore Occurrences (Ingul Megablock, Ukrainian Shield)

2017 ◽  
Vol 39 (2) ◽  
pp. 8-18
Author(s):  
N. Lyzhachenkо ◽  
◽  
S. Bondarenko ◽  
S. Kurylо ◽  
V. Syоmkа ◽  
...  
Keyword(s):  
Gold Mineralization ◽  
Ukrainian Shield
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