{"id":2137,"date":"2023-12-17T18:46:52","date_gmt":"2023-12-17T16:46:52","guid":{"rendered":"http:\/\/www.g-o-f.org.ua\/?page_id=2137"},"modified":"2023-12-21T13:06:50","modified_gmt":"2023-12-21T11:06:50","slug":"5-5","status":"publish","type":"page","link":"http:\/\/www.g-o-f.org.ua\/gb\/archive\/2023-44\/5-5\/","title":{"rendered":"THE SPECIFIC URANIUM-LEAD ISOTOPIC SYSTEM OF MONAZITE FROM THE LEUCOCRATE GNEISS OF PRIAZOVIA"},"content":{"rendered":"

L.M. Stepanyuk<\/strong>, https:\/\/orcid.org\/0000-0001-5591-5169<\/a>
\nT.I. Dovbush<\/strong>, https:\/\/orcid.org\/0000-0002-3512-3313<\/a>
\nO.B. Vysotsky<\/strong>, E-mail: alek.vysotsky@gmail.com, https:\/\/orcid.org\/0000-0002-3542-4685<\/a>
\nN.O. Kovalenko<\/strong>, https:\/\/orcid.org\/0000-0002-3203-7145<\/a><\/p>\n

M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of\u00a0 Ukraine, 03142, ave Acad. Palladina 34, Kyiv, Ukraine<\/p>\n

https:\/\/doi.org\/10.15407\/gof.2023.44.035<\/a><\/p>\n

The uranium-lead isotopic system of monazites from leucocratic gneiss (Pryazovsky megablock) was studied and the age of their formation was determined. Monazites from leucocratic gneiss are characterized by significant discordance, which is obviously due to the radiogenic component of impurity lead. In our case, the reverse discordance is to a large extent obviously due to the addition of radiogenic lead, which was captured by monazite during crystallization and is a component of impurity (abnormal composition) of lead. Calculating the age of monazite using a concordia diagram (Arens-Wetherill method) gave the following results: at the upper intersection of the regression line, the age was 2029 \u00b1 145 and 1106 \u00b1 337 Ma, at the lower one MSWD = 35. Taking into account the rather large contents of ordinary lead in the monazite samples studied and the significant dependence of the isotopic age determination results on the adequately introduced correction for ordinary (impurity lead), the isotopic composition of which may not correspond to the isotopic composition of ordinary lead according to Stacey and Kramers, calculated the relationship between numerical age values obtained from the 207Pb\/206Pb isotopic ratio and the 206Pb\/204Pb ratio, which sufficiently characterizes the content of ordinary lead. Therefore, the numerical values of the age, calculated using different models, according to the obtained analytical data, are quite different: 2027 Ma, 2037 \u00b1 18, 2029 \u00b1 145, and 2099 Ma. In our opinion, the isotopic date, 2037 \u00b1 18 Ma, calculated by the isotopic composition of lead, taking into account the errors in the determination of lead isotopic ratios, corresponds to the time of monazite crystallization to a greater extent. Within the margin of error, it coincides with the date of 2029 \u00b1 145 Ma, obtained from the upper intersection of the discordia with the concordia in the coordinates of the Ahrens-Weatherill method.<\/p>\n

Keywords:<\/strong> Azov megablock, monocyte, leucocratic gneiss, isotopic age, Ukrainian shield<\/em>.<\/p>\n

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References<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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Download (PDF)<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

L.M. Stepanyuk, https:\/\/orcid.org\/0000-0001-5591-5169 T.I. Dovbush, https:\/\/orcid.org\/0000-0002-3512-3313 O.B. Vysotsky, E-mail: alek.vysotsky@gmail.com, https:\/\/orcid.org\/0000-0002-3542-4685 N.O. Kovalenko, https:\/\/orcid.org\/0000-0002-3203-7145 M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of the National Academy of Sciences of\u00a0 Ukraine, 03142, ave Acad. Palladina 34, Kyiv, Ukraine https:\/\/doi.org\/10.15407\/gof.2023.44.035 The uranium-lead isotopic system of monazites from leucocratic gneiss (Pryazovsky megablock) was studied and the age … Continue reading “THE SPECIFIC URANIUM-LEAD ISOTOPIC SYSTEM OF MONAZITE FROM THE LEUCOCRATE GNEISS OF PRIAZOVIA”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2072,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2137","page","type-page","status-publish","hentry"],"translation":{"provider":"WPGlobus","version":"3.0.0","language":"gb","enabled_languages":["uk","gb"],"languages":{"uk":{"title":true,"content":true,"excerpt":false},"gb":{"title":true,"content":true,"excerpt":false}}},"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P9ghyZ-yt","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":2345,"url":"http:\/\/www.g-o-f.org.ua\/gb\/archive\/2024-45\/gof-2024-45-064\/","url_meta":{"origin":2137,"position":0},"title":"URANIUM MINERALIZATION IN ROCKS OF THE PETRIVSK IRON ORE DEPOSIT (INGUL MEGABLOCK, UKRAINIAN SHIELD)","author":"admin","date":"18\/12\/2024","format":false,"excerpt":"{:uk}\u041e.\u0412. \u041a\u043e\u0432\u0442\u0443\u043d kovtun85@ukr.net; https\/\/orcid: 0000-0003-0475-8778 \u041b.\u041c. \u0421\u0442\u0435\u043f\u0430\u043d\u044e\u043a stepaniuk@nas.gov.ua, https:\/\/orcid.org\/0000-0001-5591-5169 \u041e.\u0412. \u0417\u044e\u043b\u044c\u0446\u043b\u0435 olegzjults@gmail.com, https:\/\/orcid.org\/0000-0002-6204-2009 \u041e.\u0411. \u0412\u0438\u0441\u043e\u0446\u044c\u043a\u0438\u0439 alek.vysotsky@gmail.com; https\/\/orcid.org\/0000-0002-3542-4685 \u0422.\u0406. \u0414\u043e\u0432\u0431\u0443\u0448 tetyana.dovbush1@gmail.com, https:\/\/orcid.org\/0000-0002-3512-3313 \u0413.\u0413. \u041f\u0430\u0432\u043b\u043e\u0432 genychpavlov@gmail.com; https\/\/orcid.org\/0000-0002-5913-042X \u041d.\u041e. \u041a\u043e\u0432\u0430\u043b\u0435\u043d\u043a\u043e https:\/\/orcid.org\/0000-0002-3203-7145 \u0406\u043d\u0441\u0442\u0438\u0442\u0443\u0442 \u0433\u0435\u043e\u0445\u0456\u043c\u0456\u0457, \u043c\u0456\u043d\u0435\u0440\u0430\u043b\u043e\u0433\u0456\u0457 \u0442\u0430 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GREENSTONE STRUCTURE OF THE MIDDLE-DNIEPER MEGABLOCK)","author":"admin","date":"17\/12\/2023","format":false,"excerpt":"{:uk}\u0413.\u0412. \u0410\u0440\u0442\u0435\u043c\u0435\u043d\u043a\u043e1 E-mail: regulgeo@gmail.com; https:\/\/orcid.org\/0000-0002-4528-6853 \u041b.\u041c. \u0421\u0442\u0435\u043f\u0430\u043d\u044e\u043a1 E-mail: stepaniuk@nas.gov.ua; https:\/\/orcid.org\/0000-0001-5591-5169 \u041b.\u0421. \u0414\u043e\u0432\u0431\u0438\u04481 E-mail: dovbyshls@ukr.net; https:\/\/orcid.org\/0000-0003-4529-448X \u041e.\u0412. \u0417\u044e\u043b\u044c\u0446\u043b\u04351 E-mail: olegzjults@gmail.com; https\/\/orcid.org\/0000-0002-6204-2009 \u0410.\u0412. \u041c\u0430\u0440\u0442\u0438\u043d\u044e\u043a2 E-mail: pravobereg@gmail.com; https\/\/orcid.org\/0000-0002-3542-4685 \u0412.\u041e. \u0412\u0456\u043b\u044c\u043a\u043e\u0432\u0441\u044c\u043a\u0438\u04391 E-mail: V.vilkovskiy@gmail.com; https:\/\/orcid.org\/0009-0007-7117-8980 1 \u0406\u043d\u0441\u0442\u0438\u0442\u0443\u0442 \u0433\u0435\u043e\u0445\u0456\u043c\u0456\u0457, \u043c\u0456\u043d\u0435\u0440\u0430\u043b\u043e\u0433\u0456\u0457 \u0442\u0430 \u0440\u0443\u0434\u043e\u0443\u0442\u0432\u043e\u0440\u0435\u043d\u043d\u044f \u0456\u043c. \u041c.\u041f. \u0421\u0435\u043c\u0435\u043d\u0435\u043d\u043a\u0430 \u041d\u0410\u041d \u0423\u043a\u0440\u0430\u0457\u043d\u0438, 03142, \u043c. \u041a\u0438\u0457\u0432, \u0423\u043a\u0440\u0430\u0457\u043d\u0430, \u043f\u0440\u043e\u0441\u043f. \u0410\u043a\u0430\u0434. \u041f\u0430\u043b\u043b\u0430\u0434\u0456\u043d\u0430, 34 2\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2124,"url":"http:\/\/www.g-o-f.org.ua\/gb\/archive\/2023-44\/4-4\/","url_meta":{"origin":2137,"position":4},"title":"GEOCHEMISTRY OF FLUORINE OF SEDIMENTARY ROCKS OF DIFFERENT MASSES OF THE CARPATIAN BIOSPHERE RESERVE","author":"admin","date":"17\/12\/2023","format":false,"excerpt":"{:uk}{:uk}{:uk}{:uk} {:uk}\u041d.\u041e. \u041a\u0440\u044e\u0447\u0435\u043d\u043a\u043e 1 E-mail: nataliya.kryuchenko@gmail.com, https:\/\/orcid.org\/0000-0001-8774-90 \u0415 \u042f. \u0416\u043e\u0432\u0438\u043d\u0441\u044c\u043a\u0438\u0439 1 E-mail: zhovinsky@ukr.net, https:\/\/orcid.org\/0000-0003-1601-5998 \u041f.\u0421. \u041f\u0430\u043f\u0430\u0440\u0438\u0433\u0430 2 E-mail: paparyga.ps@ukr.net, https:\/\/orcid.org\/0000-0002-4021-0809 \u041e.\u0410. \u0416\u0443\u043a 1 E-mail: igmof.zhuk@gmail.com, https:\/\/orcid.org\/ 0000-0002-5264-0750 \u041c.\u0412. \u041a\u0443\u0445\u0430\u0440 1 E-mail: mvk2819@gmail.com, https:\/\/orcid.org\/0000-0003-3572-5194 1 \u0406\u043d\u0441\u0442\u0438\u0442\u0443\u0442 \u0433\u0435\u043e\u0445\u0456\u043c\u0456\u0457, \u043c\u0456\u043d\u0435\u0440\u0430\u043b\u043e\u0433\u0456\u0457 \u0442\u0430 \u0440\u0443\u0434\u043e\u0443\u0442\u0432\u043e\u0440\u0435\u043d\u043d\u044f \u0456\u043c\u0435\u043d\u0456 \u041c.\u041f. \u0421\u0435\u043c\u0435\u043d\u0435\u043d\u043a\u0430 \u041d\u0410\u041d \u0423\u043a\u0440\u0430\u0457\u043d\u0438 03142, \u043f\u0440\u043e\u0441\u043f. \u0410\u043a\u0430\u0434. \u041f\u0430\u043b\u043b\u0430\u0434\u0456\u043d\u0430, 34, \u041a\u0438\u0457\u0432,\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1784,"url":"http:\/\/www.g-o-f.org.ua\/gb\/archive\/2020-41\/8-2\/","url_meta":{"origin":2137,"position":5},"title":"U-Pb geochronology by zircon of fine-grained granite of the Osnitsky complex. (Volinsky megablok US)","author":"admin","date":"09\/12\/2020","format":false,"excerpt":"{:uk}\u041e.\u0411. \u0412\u0438\u0441\u043e\u0446\u044c\u043a\u0438\u0439 E-mail: alek.vysotsky@gmail.com, https:\/\/orcid.org\/0000-0002-3542-4685 \u041b.\u041c. \u0421\u0442\u0435\u043f\u0430\u043d\u044e\u043a https:\/\/orcid.org\/0000-0001-5591-5169 \u0422.\u0406. \u0414\u043e\u0432\u0431\u0443\u0448 https:\/\/orcid.org\/0000-0002-3512-3313 \u041d.\u041e. \u041a\u043e\u0432\u0430\u043b\u0435\u043d\u043a\u043e https:\/\/orcid.org\/0000-0002-3203-7145 \u0406\u043d\u0441\u0442\u0438\u0442\u0443\u0442 \u0433\u0435\u043e\u0445\u0456\u043c\u0456\u0457, \u043c\u0456\u043d\u0435\u0440\u0430\u043b\u043e\u0433\u0456\u0457 \u0442\u0430 \u0440\u0443\u0434\u043e\u0443\u0442\u0432\u043e\u0440\u0435\u043d\u043d\u044f \u0456\u043c\u0435\u043d\u0456 \u041c.\u041f. \u0421\u0435\u043c\u0435\u043d\u0435\u043d\u043a\u0430 \u041d\u0410\u041d \u0423\u043a\u0440\u0430\u0457\u043d\u0438, 03142, \u043f\u0440\u043e\u0441\u043f. \u0430\u043a\u0430\u0434. \u041f\u0430\u043b\u043b\u0430\u0434\u0456\u043d\u0430, 34, \u041a\u0438\u0457\u0432, \u0423\u043a\u0440\u0430\u0457\u043d\u0430 \u041d\u0430\u0432\u0435\u0434\u0435\u043d\u043e \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0438 \u0443\u0440\u0430\u043d-\u0441\u0432\u0438\u043d\u0446\u0435\u0432\u043e\u0433\u043e \u0434\u0430\u0442\u0443\u0432\u0430\u043d\u043d\u044f \u0446\u0438\u0440\u043a\u043e\u043d\u0443 \u0437 \u0434\u0440\u0456\u0431\u043d\u043e\u0437\u0435\u0440\u043d\u0438\u0441\u0442\u043e\u0433\u043e \u0433\u0440\u0430\u043d\u0456\u0442\u0443 \u041e\u0441\u043d\u0438\u0446\u044c\u043a\u043e\u0433\u043e \u0431\u043b\u043e\u043a\u0443 \u0412\u043e\u043b\u0438\u043d\u0441\u044c\u043a\u043e\u0433\u043e \u043c\u0435\u0433\u0430\u0431\u043b\u043e\u043a\u0443 \u0423\u043a\u0440\u0430\u0457\u043d\u0441\u044c\u043a\u043e\u0433\u043e \u0449\u0438\u0442\u0430. \u0420\u0456\u0437\u043d\u043e\u043c\u0430\u043d\u0456\u0442\u043d\u0456\u0441\u0442\u044c \u0433\u0440\u0430\u043d\u0456\u0442\u0456\u0432 \u043e\u0441\u043d\u0438\u0446\u044c\u043a\u043e\u0433\u043e \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0441\u0443 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0454\u0442\u044c\u0441\u044f\u2026","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.g-o-f.org.ua\/wp-content\/uploads\/2020\/index.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/pages\/2137","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/comments?post=2137"}],"version-history":[{"count":8,"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/pages\/2137\/revisions"}],"predecessor-version":[{"id":2230,"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/pages\/2137\/revisions\/2230"}],"up":[{"embeddable":true,"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/pages\/2072"}],"wp:attachment":[{"href":"http:\/\/www.g-o-f.org.ua\/gb\/wp-json\/wp\/v2\/media?parent=2137"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}