Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.03.070
M. Kozar, S. Kryvdik, L. Sietaia, O. Panova, L. Proskurka, I. Shvaika, I. Shvaika
The ICP-MS research results of the interesting from a metallogenic point of view Saltychian granites of the Azov geoblock western part are presented. Compared to the surrounding granitoids, the Saltychian granites can be enriched in Nb and Ta. It is assumed that vein pegmatites and pegmatoid granites with minerals of rare metals (Nb, Ta, REE, Y) are genetically related to them. For the first time, the results of ICP-MS analysis for the determination of the full REE spectrum as well as elements, such as Hf, Ta, Sc, etc., are presented. The main impurity elements in rocks and minerals from them (apatite, ilmenite, biotite, titanite, orthite) were determined in seven samples. Such specific features of the Saltychian granites as the presence of orthite and an increased amount of titanite, are highlighted. These are the main concentrator minerals of REE, Th, U, and Y. Based on the results of our research and the materials of the predecessors, detailed comparative characteristics of orthite and titanite in various rocks are provided. A significant part of REE and Y is concentrated in apatite and titanite, and Nb, Ta, Zr, V — in ilmenite and biotite. The geochemical features of these minerals are considered by comparing the author's results and literature data. Possible reasons for some discrepancies are analyzed. The research results presented in the article confirm the current ideas postulating the genetic connection of Saltychian granites and pegmatites of the Azov with rare metal mineralization (Nb, Ta, REE, Y).
从成矿学角度介绍了亚速海陆块西部盐基下花岗岩的ICP-MS研究成果。与周围花岗岩体相比，盐底纪花岗岩体富集Nb和Ta。认为脉状伟晶岩和类伟晶花岗岩与它们有亲缘关系，其矿物为稀有金属(Nb、Ta、REE、Y)。首次报道了用ICP-MS法测定稀土全谱及Hf、Ta、Sc等元素的结果。测定了7个样品中岩石及其矿物中的主要杂质元素(磷灰石、钛铁矿、黑云母、钛铁矿、正长石)。强调了盐底下花岗岩中正长石的存在和钛矿含量的增加等特殊特征。这些是稀土、钍、铀、钇的主要富集矿物。在本文研究成果的基础上，结合前人资料，给出了各种岩石中正长石和钛矿的详细对比特征。稀土和Y主要富集在磷灰石和钛铁矿中，铌、Ta、Zr、V主要富集在钛铁矿和黑云母中。通过与文献资料的比较，探讨了这些矿物的地球化学特征。分析了一些差异的可能原因。本文的研究结果证实了目前关于亚速盆地盐底纪花岗岩和伟晶岩与稀有金属(Nb, Ta, REE, Y)成矿关系的观点。
{"title":"GEOCHEMICAL CHARACTERISTICS OF THE SALTYCHIAN GRANITES (WESTERN AZOV AREA) ACCORDING TO THE ICP-MS RESEARCH RESULTS","authors":"M. Kozar, S. Kryvdik, L. Sietaia, O. Panova, L. Proskurka, I. Shvaika, I. Shvaika","doi":"10.15407/mineraljournal.45.03.070","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.03.070","url":null,"abstract":"The ICP-MS research results of the interesting from a metallogenic point of view Saltychian granites of the Azov geoblock western part are presented. Compared to the surrounding granitoids, the Saltychian granites can be enriched in Nb and Ta. It is assumed that vein pegmatites and pegmatoid granites with minerals of rare metals (Nb, Ta, REE, Y) are genetically related to them. For the first time, the results of ICP-MS analysis for the determination of the full REE spectrum as well as elements, such as Hf, Ta, Sc, etc., are presented. The main impurity elements in rocks and minerals from them (apatite, ilmenite, biotite, titanite, orthite) were determined in seven samples. Such specific features of the Saltychian granites as the presence of orthite and an increased amount of titanite, are highlighted. These are the main concentrator minerals of REE, Th, U, and Y. Based on the results of our research and the materials of the predecessors, detailed comparative characteristics of orthite and titanite in various rocks are provided. A significant part of REE and Y is concentrated in apatite and titanite, and Nb, Ta, Zr, V — in ilmenite and biotite. The geochemical features of these minerals are considered by comparing the author's results and literature data. Possible reasons for some discrepancies are analyzed. The research results presented in the article confirm the current ideas postulating the genetic connection of Saltychian granites and pegmatites of the Azov with rare metal mineralization (Nb, Ta, REE, Y).","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67126937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.02.099
I. M. Lisna, O. Ponomarenko, L. Shumlyanskyy, A. Larikov, L. Somka, V. Gulko, O. Kovalenko
As a result of the mineralogical and isotopic-geochemical study of U-Pb, Lu-Hf, isotopic systems of zircons from Pobug enderbites, the existence of crustal and juvenile enderbites was established. Negative values of (εNd) and negative values of εHf in zircons from enderbito-gneisses of the Middle Bouh area, Lityn enderbite, and Sabariv enderbite indicate their crustal nature, origin by account of older (Eoarchean?) rocks series, the protolith for which was probably mafic protocrust. The transformation of these rocks occurred pulsatingly 3.6-3.4, 3.0-2.8 and 2.1-1.9 billion years ago. The presence of "typomorphic" zircons in enderbites is also evidence of their crustal nature. Juvenile enderbites 117/79, from the quarry in Tyvriv and 127/79 from the quarry in the village of Holoskove have positive εNd and positive εHf values in zircons, indicating their formation from a juvenile source. They are 2080 and 2070 million years old, respectively. It is believed that it is the juvenile rocks that give increase to the continental crust, which is consistent with the idea that the growth of continents was accompanied by the addition of new sialic material from the mantle. At the same time, rocks that are an addition to the сгust may not differ in composition from older rocks. The available isotopic-geochemical and geological data indicate at least three stages of formation of enderbites (TTG association) within the Pobug granulite belt. The oldest of them is represented by enderbites (enderbito-gneisses) of the Haivoron complex. The next TTG association (Lityn complex, ~2.8 billion years ago) is more widespread, and in general forms a wide "shell" around the protocontinental core, formed by the rocks of the Haivoron complex. The youngest TTG association in the borders of the Pobug granulite belt (Berdychiv complex) is often represented by numerous intrusive bodies of juvenile enderbites, with xenoliths of more ancient rocks.
{"title":"The Nature of Enderbites From Bug Area According to the Data of Sm-Nd, U-Pb and Lu-Hf Methods","authors":"I. M. Lisna, O. Ponomarenko, L. Shumlyanskyy, A. Larikov, L. Somka, V. Gulko, O. Kovalenko","doi":"10.15407/mineraljournal.45.02.099","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.02.099","url":null,"abstract":"As a result of the mineralogical and isotopic-geochemical study of U-Pb, Lu-Hf, isotopic systems of zircons from Pobug enderbites, the existence of crustal and juvenile enderbites was established. Negative values of (εNd) and negative values of εHf in zircons from enderbito-gneisses of the Middle Bouh area, Lityn enderbite, and Sabariv enderbite indicate their crustal nature, origin by account of older (Eoarchean?) rocks series, the protolith for which was probably mafic protocrust. The transformation of these rocks occurred pulsatingly 3.6-3.4, 3.0-2.8 and 2.1-1.9 billion years ago. The presence of \"typomorphic\" zircons in enderbites is also evidence of their crustal nature. Juvenile enderbites 117/79, from the quarry in Tyvriv and 127/79 from the quarry in the village of Holoskove have positive εNd and positive εHf values in zircons, indicating their formation from a juvenile source. They are 2080 and 2070 million years old, respectively. It is believed that it is the juvenile rocks that give increase to the continental crust, which is consistent with the idea that the growth of continents was accompanied by the addition of new sialic material from the mantle. At the same time, rocks that are an addition to the сгust may not differ in composition from older rocks. The available isotopic-geochemical and geological data indicate at least three stages of formation of enderbites (TTG association) within the Pobug granulite belt. The oldest of them is represented by enderbites (enderbito-gneisses) of the Haivoron complex. The next TTG association (Lityn complex, ~2.8 billion years ago) is more widespread, and in general forms a wide \"shell\" around the protocontinental core, formed by the rocks of the Haivoron complex. The youngest TTG association in the borders of the Pobug granulite belt (Berdychiv complex) is often represented by numerous intrusive bodies of juvenile enderbites, with xenoliths of more ancient rocks.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67127154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.01.003
V. Pavlyshyn, N. M. Cherniyenko
In order to consistently highlight the distribution and forms of finding lithium in the subsoil of Ukraine, its geochemistry and mineralogy, genetic types of deposits and ore occurrences, mineralogical criteria and methods of their search and evaluation, the authors have planned a series of articles. The first part quantitatively and qualitatively analyzed the distribution and forms of Li occurrence in existing and prospective objects — the Volyn deposit, the Perzhansky ore district, rare-metal granites of the Azov region and the Korosten pluton, rare-metal pegmatites of the Azov region and the Shpolyansk-Tashlytsky ore region (Inguletsky megablock), hydrothermal of the Nagolny ridge (Donbas). The lithium-concentrating minerals in these objects, according to our data, are the following: spodumene, petalite, evcryptite, tourmaline, holmquistite, Li-Al micas of the isomorfic series (muscovite-lepidolite), Li-Fe micas of the isomorphic series (anite (lepidomelan) or siderophyllite, protolithionite, zinnwaldite, cryophyllite, lepidolite), margarite, donbasite, kukeite, polylithionite (?), tainiolite, tryphyllite, amblygonite, simferite.
{"title":"LITHIUM IN THE SUBSOIL OF UKRAINE Part 1. Distribution and forms of finding lithium in mineral complexes of Ukraine","authors":"V. Pavlyshyn, N. M. Cherniyenko","doi":"10.15407/mineraljournal.45.01.003","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.01.003","url":null,"abstract":"In order to consistently highlight the distribution and forms of finding lithium in the subsoil of Ukraine, its geochemistry and mineralogy, genetic types of deposits and ore occurrences, mineralogical criteria and methods of their search and evaluation, the authors have planned a series of articles. The first part quantitatively and qualitatively analyzed the distribution and forms of Li occurrence in existing and prospective objects — the Volyn deposit, the Perzhansky ore district, rare-metal granites of the Azov region and the Korosten pluton, rare-metal pegmatites of the Azov region and the Shpolyansk-Tashlytsky ore region (Inguletsky megablock), hydrothermal of the Nagolny ridge (Donbas). The lithium-concentrating minerals in these objects, according to our data, are the following: spodumene, petalite, evcryptite, tourmaline, holmquistite, Li-Al micas of the isomorfic series (muscovite-lepidolite), Li-Fe micas of the isomorphic series (anite (lepidomelan) or siderophyllite, protolithionite, zinnwaldite, cryophyllite, lepidolite), margarite, donbasite, kukeite, polylithionite (?), tainiolite, tryphyllite, amblygonite, simferite.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67127252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.01.083
M. Heichenko, O. Falkovich, A. Mienasova, H. Liventseva
The paper presents a description of three lithium ore deposits — Shevchenkivske, Polokhivske and the Dobra site. They are the most promising among others in terms of the economic feasibility of their development. Each of them has its advantages and disadvantages. The Shevchenkivske deposit is located in Pryazovsky, and the other two — in the Ingulsk’s megablocks. On the first, the main ore mineral is spodumene, on the second — petalite, on the Dobra site the mixed type is spodumene-petalite. All three deposits are covered by a rather thick layer of sedimentary rocks and weathering crust (up to 100 m). They are located in the steppe zone with a predominantly flat topography. The deposits were discovered at the end of the twentieth century as a result of large-scale regional geological research. They have different degrees of geological study. A common drawback is the lack of core material. Lithium ore reserves and resources up to a depth of 500 m from the day surface are estimated at the specified deposits. Taking into account the constantly growing demand for lithium, investing in the development of these deposits in Ukraine is a promising business.
{"title":"CURRENT STATE’S CONDITION OF LITHIUM ORE DEPOSITS IN UKRAINE","authors":"M. Heichenko, O. Falkovich, A. Mienasova, H. Liventseva","doi":"10.15407/mineraljournal.45.01.083","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.01.083","url":null,"abstract":"The paper presents a description of three lithium ore deposits — Shevchenkivske, Polokhivske and the Dobra site. They are the most promising among others in terms of the economic feasibility of their development. Each of them has its advantages and disadvantages. The Shevchenkivske deposit is located in Pryazovsky, and the other two — in the Ingulsk’s megablocks. On the first, the main ore mineral is spodumene, on the second — petalite, on the Dobra site the mixed type is spodumene-petalite. All three deposits are covered by a rather thick layer of sedimentary rocks and weathering crust (up to 100 m). They are located in the steppe zone with a predominantly flat topography. The deposits were discovered at the end of the twentieth century as a result of large-scale regional geological research. They have different degrees of geological study. A common drawback is the lack of core material. Lithium ore reserves and resources up to a depth of 500 m from the day surface are estimated at the specified deposits. Taking into account the constantly growing demand for lithium, investing in the development of these deposits in Ukraine is a promising business.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67126914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.02.003
I. Poberezhska, O. Matkovskyi, Ye. M. Slyvko, I. Dubrovskyi
In general, the pumpellyite series (hydrous silicates of Ca and Al) includes such mineral species as pumpellyite-(Al), pumpellyite-(Fe2+), pumpellyite-(Fe3+), pumpellyite-(Mg), and pumpellyite-(Mn). We studied pumpellyite from the Mesozoic metabasalts of the Ukrainian Carpathians in order to recreatethe facies conditions of mineral formation. The studied rocks are metabasalts of the Rakhivsko-Chyvchynskyi and Uholskyi magmatic complexes, which were studied using mineralogical, petrographical and petrogeochemical methods. In the rocks of the Rakhivsko-Chyvchynskyi complex, two morphological varieties of pumpellyite-(Fe) were found, while in the Uholskyi complex an intermediate mineral species between pumpellyite-(Al) and pumpellyite-(Fe2+) was found. The temperature of mineralization during the formation of pumpellyite-containing parageneses was determined: according to ternary feldspar geothermometry — 260 and 310 °C and according to chlorite geothermometry — from 170 to 320 °С. On the PT-diagram for metamorphic facies, the mineral paragenesis of both studied magmatic complexes fall into the field of prehnite-pumpellyite facies. The absence of clear pumpellyite-actinolite subfacies associations indicates that the pressure in the mineral formation system did not exceed 300 MPa.
{"title":"PUMPELLYITE FROM METABASALTS OF THE UKRAINIAN CARPATHIANS","authors":"I. Poberezhska, O. Matkovskyi, Ye. M. Slyvko, I. Dubrovskyi","doi":"10.15407/mineraljournal.45.02.003","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.02.003","url":null,"abstract":"In general, the pumpellyite series (hydrous silicates of Ca and Al) includes such mineral species as pumpellyite-(Al), pumpellyite-(Fe2+), pumpellyite-(Fe3+), pumpellyite-(Mg), and pumpellyite-(Mn). We studied pumpellyite from the Mesozoic metabasalts of the Ukrainian Carpathians in order to recreatethe facies conditions of mineral formation. The studied rocks are metabasalts of the Rakhivsko-Chyvchynskyi and Uholskyi magmatic complexes, which were studied using mineralogical, petrographical and petrogeochemical methods. In the rocks of the Rakhivsko-Chyvchynskyi complex, two morphological varieties of pumpellyite-(Fe) were found, while in the Uholskyi complex an intermediate mineral species between pumpellyite-(Al) and pumpellyite-(Fe2+) was found. The temperature of mineralization during the formation of pumpellyite-containing parageneses was determined: according to ternary feldspar geothermometry — 260 and 310 °C and according to chlorite geothermometry — from 170 to 320 °С. On the PT-diagram for metamorphic facies, the mineral paragenesis of both studied magmatic complexes fall into the field of prehnite-pumpellyite facies. The absence of clear pumpellyite-actinolite subfacies associations indicates that the pressure in the mineral formation system did not exceed 300 MPa.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67126960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.02.016
M. Taran, O. Vyshnevskyi
Variously colored gem-quality iron-bearing beryls from two Brazilian localities, Lavra do Abilio (Minas Gerais) and Garimpo do Cercadinho (Bahia), were studied by polarized optical absorption spectroscopy and microprobe analysis. The purpose of this study was to investigate the spatial distribution of Fe2+ in the tetrahedral site that is normally occupied by Be2+ along the c-axis of the crystals. This was done by measuring the intensity of the E^c-polarized electronic spin-allowed band of BeFe2+ that occurs at ~12 000 cm–1. The beryl samples from the two localities are different because crystals from Lavra do Abilio show a homogeneous distribution of Fe2+, whereas Fe2+ in Garimpo do Cercadinho beryls strongly varies along c. This indicates different physico-chemical conditions of crystallization. No correlation between BeFe2+ and Fetotal and Fe2+ at the octahedral Al-site was deteremined by microprobe analysis. The latter (VIFe2+) causes the blue color of aquamarine and the green color of "green" beryl. Heliodor centers also affect color. An analysis of weak narrow spin-forbidden bands of octahedral VIFe3+ at the nominal Al site and narrow molecular H2O (located in structural channels) vibrational modes indicates that both are distributed homogenously in both beryl types. Investigation of a light-blue synthetic hydrothermally grown beryl, which was studied as well, shows that the BeFe2+ distribution along c and perpendicular to c is constant in value.
利用偏光吸收光谱和微探针分析研究了来自巴西两个地区——Lavra do Abilio(米纳斯吉拉斯州)和Garimpo do Cercadinho(巴伊亚州)的各种颜色的宝石级含铁绿柱石。本研究的目的是研究Fe2+在晶体c轴上通常被Be2+占据的四面体位置上的空间分布。这是通过测量BeFe2+在~12 000 cm-1处的E^c极化电子自旋允许带的强度来完成的。两个地区的绿柱石样品的不同之处在于，来自Lavra do Abilio的绿柱石晶体中Fe2+呈均匀分布，而来自Garimpo do Cercadinho的绿柱石中Fe2+沿c方向变化强烈，这说明了不同的结晶物理化学条件。微探针分析表明，BeFe2+与Fetotal和八面体al位点上的Fe2+没有相关性。后者(VIFe2+)导致海蓝宝石的蓝色和绿柱石的绿色。Heliodor中心也影响颜色。八面体VIFe3+在名义Al位的弱窄自旋禁带和位于结构通道中的窄分子H2O的振动模式分析表明，两者在两种绿柱石类型中分布均匀。对一种浅蓝色的水热合成绿柱石的研究表明，BeFe2+沿c和垂直于c的分布是恒定的。
{"title":"SPATIAL DISTRIBUTION OF THE Fe2+ IN THE TETRAHEDRAL STRUCTURAL POSITION OF Be2+ IN CRYSTALS OF NATURAL BERYL","authors":"M. Taran, O. Vyshnevskyi","doi":"10.15407/mineraljournal.45.02.016","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.02.016","url":null,"abstract":"Variously colored gem-quality iron-bearing beryls from two Brazilian localities, Lavra do Abilio (Minas Gerais) and Garimpo do Cercadinho (Bahia), were studied by polarized optical absorption spectroscopy and microprobe analysis. The purpose of this study was to investigate the spatial distribution of Fe2+ in the tetrahedral site that is normally occupied by Be2+ along the c-axis of the crystals. This was done by measuring the intensity of the E^c-polarized electronic spin-allowed band of BeFe2+ that occurs at ~12 000 cm–1. The beryl samples from the two localities are different because crystals from Lavra do Abilio show a homogeneous distribution of Fe2+, whereas Fe2+ in Garimpo do Cercadinho beryls strongly varies along c. This indicates different physico-chemical conditions of crystallization. No correlation between BeFe2+ and Fetotal and Fe2+ at the octahedral Al-site was deteremined by microprobe analysis. The latter (VIFe2+) causes the blue color of aquamarine and the green color of \"green\" beryl. Heliodor centers also affect color. An analysis of weak narrow spin-forbidden bands of octahedral VIFe3+ at the nominal Al site and narrow molecular H2O (located in structural channels) vibrational modes indicates that both are distributed homogenously in both beryl types. Investigation of a light-blue synthetic hydrothermally grown beryl, which was studied as well, shows that the BeFe2+ distribution along c and perpendicular to c is constant in value.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67126970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.01.050
A. Larikov, O. Zaiats, M. Bagmut
The electronic paramagnetic resonance spectra of microfractions of microcline, plagioclase and albite from the Ruska Polyana granites of the Korsun-Novomyrhorod pluton located in the Ukrainian Shield were measured. The results are used together with chemical and X-ray fluorescence analyzes to study the nature of Fe and Mn in the feldspars. It is shown that structural Fe3+ in the microcline and plagioclase reflect the iron content in the melt during crystallization of the granite. At the same time, nonstructural impurities of Fe3+ and Mn2+ in the feldspar monofractions, which are part of hydroxides and carbonates along grain boundaries, do not show correlations with structural impurities of Fe3+ replacing Al3+ ions in microcline and plagioclase, and presumably reflect postcrystallization processes. The ratio of the intensities of the Fe3+ EPR lines in the spectra of microcline indicates that its ordering temperatures are close to 670 K for all studied samples.
{"title":"EPR CHARACTERISTICS OF FELDSPARS FROM GRANITES OF RUSKA POLYANA MASSIF OF KORSUN-NOVOMYRHOROD PLUTON (UKRAINIAN SHIELD)","authors":"A. Larikov, O. Zaiats, M. Bagmut","doi":"10.15407/mineraljournal.45.01.050","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.01.050","url":null,"abstract":"The electronic paramagnetic resonance spectra of microfractions of microcline, plagioclase and albite from the Ruska Polyana granites of the Korsun-Novomyrhorod pluton located in the Ukrainian Shield were measured. The results are used together with chemical and X-ray fluorescence analyzes to study the nature of Fe and Mn in the feldspars. It is shown that structural Fe3+ in the microcline and plagioclase reflect the iron content in the melt during crystallization of the granite. At the same time, nonstructural impurities of Fe3+ and Mn2+ in the feldspar monofractions, which are part of hydroxides and carbonates along grain boundaries, do not show correlations with structural impurities of Fe3+ replacing Al3+ ions in microcline and plagioclase, and presumably reflect postcrystallization processes. The ratio of the intensities of the Fe3+ EPR lines in the spectra of microcline indicates that its ordering temperatures are close to 670 K for all studied samples.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67127311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.03.060
L. Stepanyuk, O. Kovtun, O. Vysotsky, T. Dovbush, V. Gulko
The Ingul Megablock of the Ukrainian Shield is an area of mostly Paleoproterozoic continental crust located between the Dniester-Buh and Middle Dnieper Archean cratons. Its central part is occupied by the Korsun-Novomyrhorod anorthosite-rapakivigranite massif, which is 1757—1740 Ma, and the Novoukrainskyi massif, which is 2037—2034 Ma. A wide range of granitoids (biotite, garnet-biotite, hypersthene-garnet-biotite porphyry, trachytoid granites, granosyenites, and quartz syenites) participates in the geological structure of the Novoukrainskyi massif; medium and basic rocks of the monzonite series (quartz monzonites, monzonites, monzodiorites) play a significantly smaller role, gabbromonzonites) and gabroids (norites and gabbronorites). The article presents the results of the optical-microscopic study of the internal structure of zircon crystals and uranium-lead isotopic dating of monazite from trachytoid granite (sample Bo-1) and from the xenolith of giant-grained biotite-hypersthene granite (sample Во-2a) of the Novoukrainskyi massif, exposed by the Voynivskyi block stone. For trachytoid granite, sample Bo-1, an age of 2035.3 ± 2 Ma was obtained, for the age of monazite from a xenolith of coarse-grained granite, sample Bo-2a, we take the weighted average age value according to the 207Pb/206Pb isotopic ratio —2035.2 ± 1.8 Ma. Isotopic age values for monazites from trachytoid granite and coarse-grained granite xenolith expanded in the Voynivskyi block stone quarry completely coincide with the results of determining the age of gabroids (according to zircon) and granitoids according to monazite: 2037.4 ± 0.6 million years and 2034.8 ± 0.6 million years, respectively. Thus, the time of formation of the crystalline rocks of the Novoukrainskyi massif (2037—2034 Ma) completely coincides with the time of formation of granitoids of the Kirovohrad complex (2040—2020 Ma), which, taking into account the anatectic nature of the granitoids of both the Novoukrainskyi and Kirovohrad complexes, gives grounds for uniting the granitoids both complexes into one, for example, the Kropyvnytskyi complex, leaving only habroids as part of the Novoukrainskyi complex.
{"title":"NOVOUKRAINSKYI MASSIF: SOURCE OF ORIGINAL MAGMAS AND TIME OF FORMATION","authors":"L. Stepanyuk, O. Kovtun, O. Vysotsky, T. Dovbush, V. Gulko","doi":"10.15407/mineraljournal.45.03.060","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.03.060","url":null,"abstract":"The Ingul Megablock of the Ukrainian Shield is an area of mostly Paleoproterozoic continental crust located between the Dniester-Buh and Middle Dnieper Archean cratons. Its central part is occupied by the Korsun-Novomyrhorod anorthosite-rapakivigranite massif, which is 1757—1740 Ma, and the Novoukrainskyi massif, which is 2037—2034 Ma. A wide range of granitoids (biotite, garnet-biotite, hypersthene-garnet-biotite porphyry, trachytoid granites, granosyenites, and quartz syenites) participates in the geological structure of the Novoukrainskyi massif; medium and basic rocks of the monzonite series (quartz monzonites, monzonites, monzodiorites) play a significantly smaller role, gabbromonzonites) and gabroids (norites and gabbronorites). The article presents the results of the optical-microscopic study of the internal structure of zircon crystals and uranium-lead isotopic dating of monazite from trachytoid granite (sample Bo-1) and from the xenolith of giant-grained biotite-hypersthene granite (sample Во-2a) of the Novoukrainskyi massif, exposed by the Voynivskyi block stone. For trachytoid granite, sample Bo-1, an age of 2035.3 ± 2 Ma was obtained, for the age of monazite from a xenolith of coarse-grained granite, sample Bo-2a, we take the weighted average age value according to the 207Pb/206Pb isotopic ratio —2035.2 ± 1.8 Ma. Isotopic age values for monazites from trachytoid granite and coarse-grained granite xenolith expanded in the Voynivskyi block stone quarry completely coincide with the results of determining the age of gabroids (according to zircon) and granitoids according to monazite: 2037.4 ± 0.6 million years and 2034.8 ± 0.6 million years, respectively. Thus, the time of formation of the crystalline rocks of the Novoukrainskyi massif (2037—2034 Ma) completely coincides with the time of formation of granitoids of the Kirovohrad complex (2040—2020 Ma), which, taking into account the anatectic nature of the granitoids of both the Novoukrainskyi and Kirovohrad complexes, gives grounds for uniting the granitoids both complexes into one, for example, the Kropyvnytskyi complex, leaving only habroids as part of the Novoukrainskyi complex.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67127396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.02.032
V. Pavlyshyn, N. M. Cherniyenko, I.M. Lunova
The second part of the publication "Lithium in the subsoil of Ukraine" highlights the mineralogy of rock-forming quartz from lithium-bearing objects of Ukraine: chamber pegmatites of the Korosten pluton, Perzhansky ore district, rare-metal granites and pegmatites of the Azov region, rare-metal pegmatites of the Inhulsky megablock, hydrothermalites of the Nagolny Ridge (Donetsk basin). In all these objects, quartz is characterized mostly from the point of view of its typomorphic value. The conclusion was as follows: the habit of quartz crystals has a typomorphic value, but cannot be described for all genetic situations by one simple scheme of the evolution of simple forms; so the main typomorphic information is "hidden" in the middle of quartz crystals. Point defects of its crystal structure are of greatest importance, primarily Al-O– centers and hydrogen defects, which are the most common in the mineral. They are best studied in crystals of chambered pegmatites and hydrothermal veins of the Nagolny ridge. The dependence of these defects on the action of external factors has been clarified. In particular, in chambered pegmatites, in contrast to crystal-bearing veins, a paradox occurs: with a decrease in the temperature of quartz growth, which is accompanied by an increase in the concentration (activity) of Li in the environment of mineralization, the number of lithium-hydrogen defects in the late zones of quartz decreases. It is assumed that in productive pegmatites this is due to the competing action of lithium micas — the main Li absorbers, the role of which increased with a decrease in the temperature of the solutions and an increase in their pH. In the quartz of rare-metal pegmatites, a high concentration of Al-Li centers has been established, which reaches a maximum in the quartz of the central zones and is therefore a criterion for the degree of differentiation of pegmatites. The luminescent properties of quartz from the petalite pegmatites of the Inhulsky megablock, caused by superimposed metasomatic processes and metamorphism, are unusual.
{"title":"Lithium in the Subsoil of Ukraine. Part 2. Mineralogy of Lithium-Bearing Objects: Quartz","authors":"V. Pavlyshyn, N. M. Cherniyenko, I.M. Lunova","doi":"10.15407/mineraljournal.45.02.032","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.02.032","url":null,"abstract":"The second part of the publication \"Lithium in the subsoil of Ukraine\" highlights the mineralogy of rock-forming quartz from lithium-bearing objects of Ukraine: chamber pegmatites of the Korosten pluton, Perzhansky ore district, rare-metal granites and pegmatites of the Azov region, rare-metal pegmatites of the Inhulsky megablock, hydrothermalites of the Nagolny Ridge (Donetsk basin). In all these objects, quartz is characterized mostly from the point of view of its typomorphic value. The conclusion was as follows: the habit of quartz crystals has a typomorphic value, but cannot be described for all genetic situations by one simple scheme of the evolution of simple forms; so the main typomorphic information is \"hidden\" in the middle of quartz crystals. Point defects of its crystal structure are of greatest importance, primarily Al-O– centers and hydrogen defects, which are the most common in the mineral. They are best studied in crystals of chambered pegmatites and hydrothermal veins of the Nagolny ridge. The dependence of these defects on the action of external factors has been clarified. In particular, in chambered pegmatites, in contrast to crystal-bearing veins, a paradox occurs: with a decrease in the temperature of quartz growth, which is accompanied by an increase in the concentration (activity) of Li in the environment of mineralization, the number of lithium-hydrogen defects in the late zones of quartz decreases. It is assumed that in productive pegmatites this is due to the competing action of lithium micas — the main Li absorbers, the role of which increased with a decrease in the temperature of the solutions and an increase in their pH. In the quartz of rare-metal pegmatites, a high concentration of Al-Li centers has been established, which reaches a maximum in the quartz of the central zones and is therefore a criterion for the degree of differentiation of pegmatites. The luminescent properties of quartz from the petalite pegmatites of the Inhulsky megablock, caused by superimposed metasomatic processes and metamorphism, are unusual.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67126979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.15407/mineraljournal.45.02.062
K.Ye. Shniukova, L. Tomurko, N. Konoval
Rapakivi of the Korsun-Novomyrhorod pluton (KNP), being the latest Precambrian granites of the central part of the Ukrainian shield, contain older acidic and intermediate rocks as xenoliths, the geochemical features of which reflect the Early Proterozoic geodynamic situation. Rapakivi granites, their differentiates and three types of xenoliths in them, represented by plagiogneiss, pink granite and charnockitoid (mangerite), were selected in the northwestern part of the KNP for geochemical studies. Analysis findings were compared with the geochemical characteristics of similar rocks of igneous and metamorphic Precambrian complexes that surround the KNP and could serve as a source of xenoliths. Based on distribution patterns of rare earth elements, lithophile elements content and their ratios relations in the rocks, taking into account their petrographic composition, it was established that plagiogneiss belongs to the upper part of the Inhul-Inhulets series, pink granite belongs to the Kirovohrad complex, and charnokitoid belongs to the intermediate rocks of the Tashlyk complex. In the latter, acid charnockitoids (enderbites) are probably younger than intermediate ones and were formed in another geodynamic setting. Pink granite, like the granites of the Kirovohrad complex, shows collisional geochemical features, in contrast to the rapakivi granites containing these xenoliths, which have predominantly within-plate geochemical characteristics. Thus, in the form of xenoliths in rapakivi those rocks were preserved that had been generated before and during the collision that occurred about 2 billion years ago and constructed a crust thickening at the site of the Inhul megablock, under subsequent extension of which about 1.75 billion years ago the KNP was intruded. Acid charnockitoids of the Tashlyk complex and rocks of the Novoukrainian complex, which are absent in xenoliths, probably were formed after the collision.
{"title":"Geochemistry of Xenoliths in Rapakivi Granites of the Korsun-Novomyrhorod Pluton (Ukrainian Shield)","authors":"K.Ye. Shniukova, L. Tomurko, N. Konoval","doi":"10.15407/mineraljournal.45.02.062","DOIUrl":"https://doi.org/10.15407/mineraljournal.45.02.062","url":null,"abstract":"Rapakivi of the Korsun-Novomyrhorod pluton (KNP), being the latest Precambrian granites of the central part of the Ukrainian shield, contain older acidic and intermediate rocks as xenoliths, the geochemical features of which reflect the Early Proterozoic geodynamic situation. Rapakivi granites, their differentiates and three types of xenoliths in them, represented by plagiogneiss, pink granite and charnockitoid (mangerite), were selected in the northwestern part of the KNP for geochemical studies. Analysis findings were compared with the geochemical characteristics of similar rocks of igneous and metamorphic Precambrian complexes that surround the KNP and could serve as a source of xenoliths. Based on distribution patterns of rare earth elements, lithophile elements content and their ratios relations in the rocks, taking into account their petrographic composition, it was established that plagiogneiss belongs to the upper part of the Inhul-Inhulets series, pink granite belongs to the Kirovohrad complex, and charnokitoid belongs to the intermediate rocks of the Tashlyk complex. In the latter, acid charnockitoids (enderbites) are probably younger than intermediate ones and were formed in another geodynamic setting. Pink granite, like the granites of the Kirovohrad complex, shows collisional geochemical features, in contrast to the rapakivi granites containing these xenoliths, which have predominantly within-plate geochemical characteristics. Thus, in the form of xenoliths in rapakivi those rocks were preserved that had been generated before and during the collision that occurred about 2 billion years ago and constructed a crust thickening at the site of the Inhul megablock, under subsequent extension of which about 1.75 billion years ago the KNP was intruded. Acid charnockitoids of the Tashlyk complex and rocks of the Novoukrainian complex, which are absent in xenoliths, probably were formed after the collision.","PeriodicalId":53834,"journal":{"name":"Mineralogical Journal-Ukraine","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67127071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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