Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice
Recent studies have shown that stratigraphically disturbed meteoric ice bedded at Vostok Station between 3318 and 3539 m dates back to 1.2 Ma BP and possibly beyond. As part of the VOICE (Vostok Oldest Ice Challenge) initiative, a new deviation from parent hole 5G-1 was made at depths of 3270–3291 m...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2021-09-01
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| Series: | Annals of Glaciology |
| Subjects: | |
| Online Access: | https://www.cambridge.org/core/product/identifier/S0260305521000045/type/journal_article |
| _version_ | 1811157209263898624 |
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| author | Aleksei V. Turkeev Nikolai I. Vasilev Vladimir Ya. Lipenkov Alexey V. Bolshunov Alexey A. Ekaykin Andrei N. Dmitriev Dmitrii A. Vasilev |
| author_facet | Aleksei V. Turkeev Nikolai I. Vasilev Vladimir Ya. Lipenkov Alexey V. Bolshunov Alexey A. Ekaykin Andrei N. Dmitriev Dmitrii A. Vasilev |
| author_sort | Aleksei V. Turkeev |
| collection | DOAJ |
| description | Recent studies have shown that stratigraphically disturbed meteoric ice bedded at Vostok Station between 3318 and 3539 m dates back to 1.2 Ma BP and possibly beyond. As part of the VOICE (Vostok Oldest Ice Challenge) initiative, a new deviation from parent hole 5G-1 was made at depths of 3270–3291 m in the 2018/19 austral season with the aim of obtaining a replicate core of the old ice. Sidetracking was initiated using the standard KEMS-132 electromechanical drill routinely employed for deep ice coring at Vostok, without significant changes to its initial design. Here we describe the method and operating procedures for replicate coring at a targeted depth in an existing slant hole, involving the use of a cable-suspended electromechanical drill. The design of the milling cutter head used for sidetracking is presented. The performance characteristics and the experience of drilling branch-hole 5G-5 at Vostok are described and discussed. |
| first_indexed | 2024-04-10T05:03:16Z |
| format | Article |
| id | doaj.art-1341df518a4645489ce1aab1eaa49dbe |
| institution | Directory Open Access Journal |
| issn | 0260-3055 1727-5644 |
| language | English |
| last_indexed | 2024-04-10T05:03:16Z |
| publishDate | 2021-09-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Annals of Glaciology |
| spelling | doaj.art-1341df518a4645489ce1aab1eaa49dbe2023-03-09T12:27:44ZengCambridge University PressAnnals of Glaciology0260-30551727-56442021-09-016230531010.1017/aog.2021.4Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric iceAleksei V. Turkeev0https://orcid.org/0000-0002-9453-4059Nikolai I. Vasilev1Vladimir Ya. Lipenkov2Alexey V. Bolshunov3Alexey A. Ekaykin4https://orcid.org/0000-0001-9819-2802Andrei N. Dmitriev5Dmitrii A. Vasilev6https://orcid.org/0000-0001-8132-8881Arctic and Antarctic Research Institute, St. Petersburg, RussiaSaint-Petersburg Mining University, St. Petersburg, RussiaArctic and Antarctic Research Institute, St. Petersburg, RussiaSaint-Petersburg Mining University, St. Petersburg, RussiaArctic and Antarctic Research Institute, St. Petersburg, Russia Institute of Earth Sciences, St. Petersburg State University, St. Petersburg, RussiaSaint-Petersburg Mining University, St. Petersburg, RussiaSaint-Petersburg Mining University, St. Petersburg, RussiaRecent studies have shown that stratigraphically disturbed meteoric ice bedded at Vostok Station between 3318 and 3539 m dates back to 1.2 Ma BP and possibly beyond. As part of the VOICE (Vostok Oldest Ice Challenge) initiative, a new deviation from parent hole 5G-1 was made at depths of 3270–3291 m in the 2018/19 austral season with the aim of obtaining a replicate core of the old ice. Sidetracking was initiated using the standard KEMS-132 electromechanical drill routinely employed for deep ice coring at Vostok, without significant changes to its initial design. Here we describe the method and operating procedures for replicate coring at a targeted depth in an existing slant hole, involving the use of a cable-suspended electromechanical drill. The design of the milling cutter head used for sidetracking is presented. The performance characteristics and the experience of drilling branch-hole 5G-5 at Vostok are described and discussed.https://www.cambridge.org/core/product/identifier/S0260305521000045/type/journal_articleIce drillingold icepaleoclimatereplicate ice coringsidetracking |
| spellingShingle | Aleksei V. Turkeev Nikolai I. Vasilev Vladimir Ya. Lipenkov Alexey V. Bolshunov Alexey A. Ekaykin Andrei N. Dmitriev Dmitrii A. Vasilev Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice Annals of Glaciology Ice drilling old ice paleoclimate replicate ice coring sidetracking |
| title | Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice |
| title_full | Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice |
| title_fullStr | Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice |
| title_full_unstemmed | Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice |
| title_short | Drilling the new 5G-5 branch hole at Vostok Station for collecting a replicate core of old meteoric ice |
| title_sort | drilling the new 5g 5 branch hole at vostok station for collecting a replicate core of old meteoric ice |
| topic | Ice drilling old ice paleoclimate replicate ice coring sidetracking |
| url | https://www.cambridge.org/core/product/identifier/S0260305521000045/type/journal_article |
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