Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene
The syngenetic ice and ice-ground composite veins in khasyrey (alas) and interalas plateaus were studied on the second lake-alluvial terrace located in the North of the Gydan Peninsula near the village of Gyda. On the basis of the radiocarbon dating, the time of formation of deposits containing vein...
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| Format: | Article |
| Language: | Russian |
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Nauka
2019-12-01
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| Series: | Лëд и снег |
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| Online Access: | https://ice-snow.igras.ru/jour/article/view/746 |
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| author | Ya. V. Tikhonravova A. V. Lupachev E. A. Slagoda V. V. Rogov A. O. Kuznetsova V. I. Butakov G. V. Simonova N. A. Taratunina D. R. Mullanurov |
| author_facet | Ya. V. Tikhonravova A. V. Lupachev E. A. Slagoda V. V. Rogov A. O. Kuznetsova V. I. Butakov G. V. Simonova N. A. Taratunina D. R. Mullanurov |
| author_sort | Ya. V. Tikhonravova |
| collection | DOAJ |
| description | The syngenetic ice and ice-ground composite veins in khasyrey (alas) and interalas plateaus were studied on the second lake-alluvial terrace located in the North of the Gydan Peninsula near the village of Gyda. On the basis of the radiocarbon dating, the time of formation of deposits containing veins from was established – from 16 640 to 854 BP. The peat deposits are mainly represented by the following species: Carex sp., Eriophorum sp., Betula nana, Equisetum sp., Calamagrostis sp., Vaccinium vitis-idaea, Drepanocladus sp., Empetrum sp., Vaccinium uliginosum, Rubus arcticus, Petasites sp. It is established that the polygonal-veined ice of khasyrey and interalas plateaus, except for vertical-striped «clean» ice, contain areas with vertical wavy streaks of ice-ground. Ice of elementary veins and segregation ice were revealed in the composition of veins according to structural and textural features in polarized light. Elementary ice veins compose «clean» ice sections of veins and segregation ice which are their ice-ground sections. Elementary veins are indicative of the predominance of the process of frost cracking during the formation of polygonal-vein ices. The presence of inclusions of ice-ground in the structure of veins points is evidence of a manifestation of local thermokarst processes under the growth of polygonal-vein ice. Ice-ground veins were formed by repeated thawing of the initial ice veins. The formation of ice-ground veins during syngenetic freezing of sediments of the second lake-alluvial terrace is related to uneven manifestation of thermokarst in different facies situations and and climate changes at the Early Pleistocene and Holocene. |
| format | Article |
| id | doaj-art-b48b80df209a4b249cc198baebf0d564 |
| institution | DOAJ |
| issn | 2076-6734 2412-3765 |
| language | Russian |
| publishDate | 2019-12-01 |
| publisher | Nauka |
| record_format | Article |
| series | Лëд и снег |
| spelling | doaj-art-b48b80df209a4b249cc198baebf0d5642025-08-20T03:22:01ZrusNaukaЛëд и снег2076-67342412-37652019-12-0159455757010.15356/2076-6734-2019-4-367592Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–HoloceneYa. V. Tikhonravova0A. V. Lupachev1E. A. Slagoda2V. V. Rogov3A. O. Kuznetsova4V. I. Butakov5G. V. Simonova6N. A. Taratunina7D. R. Mullanurov8Earth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch, Russian Academy of Sciences; Melnikov Permafrost Institute, Siberian Branch, Russian Academy of SciencesInstitute of Physicochemical and Biological Problems at Soil Science, Russian Academy of SciencesEarth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch, Russian Academy of Sciences; Tyumen State University; Industrial University of TyumenEarth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch, Russian Academy of Sciences; Lomonosov Moscow State UniversityEarth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch, Russian Academy of SciencesEarth Cryosphere Institute, Tyumen Scientific Centre, Siberian Branch, Russian Academy of Sciences; Industrial University of TyumenInstitute of Monitoring of Climatic and Ecological Systems, Siberian Branch, Russian Academy of SciencesLomonosov Moscow State UniversityIndustrial University of TyumenThe syngenetic ice and ice-ground composite veins in khasyrey (alas) and interalas plateaus were studied on the second lake-alluvial terrace located in the North of the Gydan Peninsula near the village of Gyda. On the basis of the radiocarbon dating, the time of formation of deposits containing veins from was established – from 16 640 to 854 BP. The peat deposits are mainly represented by the following species: Carex sp., Eriophorum sp., Betula nana, Equisetum sp., Calamagrostis sp., Vaccinium vitis-idaea, Drepanocladus sp., Empetrum sp., Vaccinium uliginosum, Rubus arcticus, Petasites sp. It is established that the polygonal-veined ice of khasyrey and interalas plateaus, except for vertical-striped «clean» ice, contain areas with vertical wavy streaks of ice-ground. Ice of elementary veins and segregation ice were revealed in the composition of veins according to structural and textural features in polarized light. Elementary ice veins compose «clean» ice sections of veins and segregation ice which are their ice-ground sections. Elementary veins are indicative of the predominance of the process of frost cracking during the formation of polygonal-vein ices. The presence of inclusions of ice-ground in the structure of veins points is evidence of a manifestation of local thermokarst processes under the growth of polygonal-vein ice. Ice-ground veins were formed by repeated thawing of the initial ice veins. The formation of ice-ground veins during syngenetic freezing of sediments of the second lake-alluvial terrace is related to uneven manifestation of thermokarst in different facies situations and and climate changes at the Early Pleistocene and Holocene.https://ice-snow.igras.ru/jour/article/view/746botanical composition of peatcomposite wedgeice wedgeradiocarbon agesegregated icetexture and structure of icethermokarst |
| spellingShingle | Ya. V. Tikhonravova A. V. Lupachev E. A. Slagoda V. V. Rogov A. O. Kuznetsova V. I. Butakov G. V. Simonova N. A. Taratunina D. R. Mullanurov Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene Лëд и снег botanical composition of peat composite wedge ice wedge radiocarbon age segregated ice texture and structure of ice thermokarst |
| title | Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene |
| title_full | Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene |
| title_fullStr | Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene |
| title_full_unstemmed | Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene |
| title_short | Structure and formation of ice-ground veins of the second lake-alluvial terrace in the North of Gydan in the late Neopleistocene–Holocene |
| title_sort | structure and formation of ice ground veins of the second lake alluvial terrace in the north of gydan in the late neopleistocene holocene |
| topic | botanical composition of peat composite wedge ice wedge radiocarbon age segregated ice texture and structure of ice thermokarst |
| url | https://ice-snow.igras.ru/jour/article/view/746 |
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