Pub Date : 2024-06-20DOI: 10.1134/s1028334x24602529
D. A. Lykhin, A. A. Ivanova, N. V. Alymova, E. B. Salnikova, A. B. Kotov, A. V. Nikiforov, A. A. Vorontsov, Yu. V. Plotkina, O. L. Galnikova, E. V. Tolmacheva
Abstract
The issue of the age of rare-metal granites of the Zashikhinskoye field is discussed. To obtain U–Pb (ID TIMS) geochronological data, a modified “chemical abrasion” technique with preliminary high-temperature annealing was used for metamictic zircon. Estimates of the age of alkaline leucogranites and albitites coincide and correspond to the age of formation of rare-metal granites of the Zashikhinskoye field 267 ± 1 Ma. Within East Sayan, igneous rocks with close ages are not yet known. The closest area of magmatic activity of this time was the large zonal Khangai magmatic range, which arose under the influence of the mantle plume and is characterized by widespread development in its peripheral part of alkaline and bimodal associations, including rare-metal magmatic ones. The Zashikhinskoye field is more than 350 km from the edge of its range. Nevertheless, on the basis of geochronological and geochemical data, it was assumed that this field was associated with the activity of the Khangai plume.
{"title":"Age of the Zashikhinskoye Rare Metal Deposit (Eastern Sayan): Results of U–Pb (ID TIMS) Geochronological Studies of Metamictic Zircon","authors":"D. A. Lykhin, A. A. Ivanova, N. V. Alymova, E. B. Salnikova, A. B. Kotov, A. V. Nikiforov, A. A. Vorontsov, Yu. V. Plotkina, O. L. Galnikova, E. V. Tolmacheva","doi":"10.1134/s1028334x24602529","DOIUrl":"https://doi.org/10.1134/s1028334x24602529","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The issue of the age of rare-metal granites of the Zashikhinskoye field is discussed. To obtain U–Pb (ID TIMS) geochronological data, a modified “chemical abrasion” technique with preliminary high-temperature annealing was used for metamictic zircon. Estimates of the age of alkaline leucogranites and albitites coincide and correspond to the age of formation of rare-metal granites of the Zashikhinskoye field 267 ± 1 Ma. Within East Sayan, igneous rocks with close ages are not yet known. The closest area of magmatic activity of this time was the large zonal Khangai magmatic range, which arose under the influence of the mantle plume and is characterized by widespread development in its peripheral part of alkaline and bimodal associations, including rare-metal magmatic ones. The Zashikhinskoye field is more than 350 km from the edge of its range. Nevertheless, on the basis of geochronological and geochemical data, it was assumed that this field was associated with the activity of the Khangai plume.</p>","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24601056
V. Ovtchinnikov, O. Usoltseva
{"title":"Multiscale Inhomogeneities on the Surface of the Earth’s Inner Core","authors":"V. Ovtchinnikov, O. Usoltseva","doi":"10.1134/s1028334x24601056","DOIUrl":"https://doi.org/10.1134/s1028334x24601056","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24602396
O. B. Oleinikov, M. Stifeeva, N. A. Oparin, A. Kotov, E. Salnikova, M. G. Oshchepkova
{"title":"U–Pb (ID-TIMS) Age of Perovskite from Kimberlites of the Manchary Pipe (Khompu-Maya Kimberlite Field, Central Yakutia)","authors":"O. B. Oleinikov, M. Stifeeva, N. A. Oparin, A. Kotov, E. Salnikova, M. G. Oshchepkova","doi":"10.1134/s1028334x24602396","DOIUrl":"https://doi.org/10.1134/s1028334x24602396","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x2460227x
G. Zherebtsov, A. V. Tashchilin, N. Perevalova, K. Ratovsky, I. V. Medvedeva
{"title":"Modeling the Influence of Changes in the Parameters of a Neutral Atmosphere on the Ionospheric Electron Density","authors":"G. Zherebtsov, A. V. Tashchilin, N. Perevalova, K. Ratovsky, I. V. Medvedeva","doi":"10.1134/s1028334x2460227x","DOIUrl":"https://doi.org/10.1134/s1028334x2460227x","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x2460213x
T. O. Chaplina, V. P. Pakhnenko
{"title":"Vortex Convective Flows Formed during Ice Melting in Single-Component Media","authors":"T. O. Chaplina, V. P. Pakhnenko","doi":"10.1134/s1028334x2460213x","DOIUrl":"https://doi.org/10.1134/s1028334x2460213x","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24602190
Yu. N. Chizhova, V. N. Mikhalenko, I. A. Korneva, Ya. D. Muravyov, A. G. Hayredinova, M. A. Vorobiev
{"title":"New Data on Deuterium Excess Values of Glacial Ice in Kamchatka Peninsula","authors":"Yu. N. Chizhova, V. N. Mikhalenko, I. A. Korneva, Ya. D. Muravyov, A. G. Hayredinova, M. A. Vorobiev","doi":"10.1134/s1028334x24602190","DOIUrl":"https://doi.org/10.1134/s1028334x24602190","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141357685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24602220
E. Solotchina, P. A. Solotchin, E. Bezrukova, A. Zhdanova, A. A. Shchetnikov, I. Danilenko, M. I. Kuzmin
{"title":"Mineralogical Indicators of the Holocene Climate in Sediments of the High-Mountain Lake Sagan-Nur (East Sayan Mountains)","authors":"E. Solotchina, P. A. Solotchin, E. Bezrukova, A. Zhdanova, A. A. Shchetnikov, I. Danilenko, M. I. Kuzmin","doi":"10.1134/s1028334x24602220","DOIUrl":"https://doi.org/10.1134/s1028334x24602220","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24602335
A. Bolsunovsky, R. V. Borisov, D. Dementyev
{"title":"New Data on Potential Mobility of Anthropogenic Radionuclides in Bottom Sediments of the Yenisei River","authors":"A. Bolsunovsky, R. V. Borisov, D. Dementyev","doi":"10.1134/s1028334x24602335","DOIUrl":"https://doi.org/10.1134/s1028334x24602335","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24602402
I. Garagash, L. Lobkovsky, A. A. Baranov
{"title":"Stress State and Mechanics of Ice Shelves Collapse","authors":"I. Garagash, L. Lobkovsky, A. A. Baranov","doi":"10.1134/s1028334x24602402","DOIUrl":"https://doi.org/10.1134/s1028334x24602402","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141356734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-11DOI: 10.1134/s1028334x24602414
G. Matishov, O. N. Yasakova
{"title":"Discovery of New Species of Dinoflagellates in the Pelagic Zone of the Northeastern Part of the Black Sea","authors":"G. Matishov, O. N. Yasakova","doi":"10.1134/s1028334x24602414","DOIUrl":"https://doi.org/10.1134/s1028334x24602414","url":null,"abstract":"","PeriodicalId":11352,"journal":{"name":"Doklady Earth Sciences","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141359044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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