Late Precambrian diamictites of northeastern Svalbard
Summary In northeastern Spitsbergen and western Nordaustlandet well preserved Late Precambrian diamictites have variously been interpreted as tillites or the product of tectonic activity. By focusing on the sedimentology of the diamictites in two key areas, this paper presents unequivocal evidence t...
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Cambridge University Press (CUP)
1982
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Online Access: | http://dx.doi.org/10.1017/s0016756800027035 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800027035 |
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crcambridgeupr:10.1017/s0016756800027035 2024-09-15T18:20:27+00:00 Late Precambrian diamictites of northeastern Svalbard Hambrey, M. J. 1982 http://dx.doi.org/10.1017/s0016756800027035 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800027035 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 119, issue 6, page 527-551 ISSN 0016-7568 1469-5081 journal-article 1982 crcambridgeupr https://doi.org/10.1017/s0016756800027035 2024-07-31T04:04:47Z Summary In northeastern Spitsbergen and western Nordaustlandet well preserved Late Precambrian diamictites have variously been interpreted as tillites or the product of tectonic activity. By focusing on the sedimentology of the diamictites in two key areas, this paper presents unequivocal evidence that the diamictites are indeed glacigenic, confirming the conclusions of previous field investigations. In particular dropstones in large numbers and striated stones are diagnostic of glacial transport, while other characteristics are strongly suggestive of glacial conditions. Stratigraphic studies indicate two discrete glacial episodes, both belonging to the Varangian epoch. The earlier resulted in a thin tillite sequence deposited in a shallow shelf-tidal-lacustrine environment. It is closely associated with stromatolitic dolostones. The later episode resulted in a tillite sequence a few hundred metres thick with two units in northeastern Spitsbergen separated and bounded by dolostone units. Deposition occurred in a shallow marine environment but occasional uplift led to terrestrial conditions and the deposition of fluvioglacial sediments and the development of periglacial phenomena. Article in Journal/Newspaper Nordaustlandet Svalbard Spitsbergen Cambridge University Press Geological Magazine 119 6 527 551 |
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Cambridge University Press |
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crcambridgeupr |
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English |
description |
Summary In northeastern Spitsbergen and western Nordaustlandet well preserved Late Precambrian diamictites have variously been interpreted as tillites or the product of tectonic activity. By focusing on the sedimentology of the diamictites in two key areas, this paper presents unequivocal evidence that the diamictites are indeed glacigenic, confirming the conclusions of previous field investigations. In particular dropstones in large numbers and striated stones are diagnostic of glacial transport, while other characteristics are strongly suggestive of glacial conditions. Stratigraphic studies indicate two discrete glacial episodes, both belonging to the Varangian epoch. The earlier resulted in a thin tillite sequence deposited in a shallow shelf-tidal-lacustrine environment. It is closely associated with stromatolitic dolostones. The later episode resulted in a tillite sequence a few hundred metres thick with two units in northeastern Spitsbergen separated and bounded by dolostone units. Deposition occurred in a shallow marine environment but occasional uplift led to terrestrial conditions and the deposition of fluvioglacial sediments and the development of periglacial phenomena. |
format |
Article in Journal/Newspaper |
author |
Hambrey, M. J. |
spellingShingle |
Hambrey, M. J. Late Precambrian diamictites of northeastern Svalbard |
author_facet |
Hambrey, M. J. |
author_sort |
Hambrey, M. J. |
title |
Late Precambrian diamictites of northeastern Svalbard |
title_short |
Late Precambrian diamictites of northeastern Svalbard |
title_full |
Late Precambrian diamictites of northeastern Svalbard |
title_fullStr |
Late Precambrian diamictites of northeastern Svalbard |
title_full_unstemmed |
Late Precambrian diamictites of northeastern Svalbard |
title_sort |
late precambrian diamictites of northeastern svalbard |
publisher |
Cambridge University Press (CUP) |
publishDate |
1982 |
url |
http://dx.doi.org/10.1017/s0016756800027035 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800027035 |
genre |
Nordaustlandet Svalbard Spitsbergen |
genre_facet |
Nordaustlandet Svalbard Spitsbergen |
op_source |
Geological Magazine volume 119, issue 6, page 527-551 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756800027035 |
container_title |
Geological Magazine |
container_volume |
119 |
container_issue |
6 |
container_start_page |
527 |
op_container_end_page |
551 |
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1810458831499558912 |