Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory
Four late Quaternary cryostratigraphic units are recognized in the unconsolidated valley-bottom deposits of the Klondike area, Yukon Territory. Three of the units, in ice-rich, loessal sediments of pre-Wisconsinan or Wisconsinan age, collectively compose the King Solomon Formation. They are overlain...
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crcansciencepubl:10.1139/e00-013 2024-04-28T08:23:37+00:00 Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory Kotler, E Burn, C R 2000 http://dx.doi.org/10.1139/e00-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/e00-013 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 37, issue 6, page 849-861 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2000 crcansciencepubl https://doi.org/10.1139/e00-013 2024-04-09T06:56:24Z Four late Quaternary cryostratigraphic units are recognized in the unconsolidated valley-bottom deposits of the Klondike area, Yukon Territory. Three of the units, in ice-rich, loessal sediments of pre-Wisconsinan or Wisconsinan age, collectively compose the King Solomon Formation. They are overlain by a Holocene organic unit. The units are distinguished by their cryostratigraphic characteristics and oxygen-isotope ratios of included ground ice. The basal unit is the Last Chance Creek Member, a pre-Late Wisconsinan deposit, containing preserved ice wedges δ 18 O ~ -28 to -26; δD ~ -225 to -209). The overlying Quartz Creek Member, a Late Wisconsinan unit, is dominated by organic-rich loess. Massive ice is noticeably absent, although the sediments are ice rich. The isotopic composition of ice in this unit is characteristic of full-glacial conditions (δ 18 O ~ -32 to -29; δD ~ -234 to -257). An abrupt change to warmer and wetter conditions at the end of glaciation, prior to the Holocene, is recorded by the ice-rich, colluviated Dago Hill Member (δ 18 O ~ -28 to -21; δD ~ -164 to -225), which began accumulating by 11.62 14 C ka BP. Large ice wedges originate in this unit, and, in places, penetrate the underlying full-glacial sediments. Even higher δ 18 O and δD values occur for ice in the Holocene organic unit (δ 18 O ~ -25 to -20; δD ~ -164 to -189). The majority of the massive icy bodies in the King Solomon Formation are ice wedges, but pool ice and aggradational ice are also exposed, especially in the Dago Hill Member. Massive icy beds formed by groundwater intrusion into permafrost occur at the lower contact of the Quartz Creek Member. Article in Journal/Newspaper Ice permafrost wedge* Yukon Canadian Science Publishing Canadian Journal of Earth Sciences 37 6 849 861 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Kotler, E Burn, C R Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory |
topic_facet |
General Earth and Planetary Sciences |
description |
Four late Quaternary cryostratigraphic units are recognized in the unconsolidated valley-bottom deposits of the Klondike area, Yukon Territory. Three of the units, in ice-rich, loessal sediments of pre-Wisconsinan or Wisconsinan age, collectively compose the King Solomon Formation. They are overlain by a Holocene organic unit. The units are distinguished by their cryostratigraphic characteristics and oxygen-isotope ratios of included ground ice. The basal unit is the Last Chance Creek Member, a pre-Late Wisconsinan deposit, containing preserved ice wedges δ 18 O ~ -28 to -26; δD ~ -225 to -209). The overlying Quartz Creek Member, a Late Wisconsinan unit, is dominated by organic-rich loess. Massive ice is noticeably absent, although the sediments are ice rich. The isotopic composition of ice in this unit is characteristic of full-glacial conditions (δ 18 O ~ -32 to -29; δD ~ -234 to -257). An abrupt change to warmer and wetter conditions at the end of glaciation, prior to the Holocene, is recorded by the ice-rich, colluviated Dago Hill Member (δ 18 O ~ -28 to -21; δD ~ -164 to -225), which began accumulating by 11.62 14 C ka BP. Large ice wedges originate in this unit, and, in places, penetrate the underlying full-glacial sediments. Even higher δ 18 O and δD values occur for ice in the Holocene organic unit (δ 18 O ~ -25 to -20; δD ~ -164 to -189). The majority of the massive icy bodies in the King Solomon Formation are ice wedges, but pool ice and aggradational ice are also exposed, especially in the Dago Hill Member. Massive icy beds formed by groundwater intrusion into permafrost occur at the lower contact of the Quartz Creek Member. |
format |
Article in Journal/Newspaper |
author |
Kotler, E Burn, C R |
author_facet |
Kotler, E Burn, C R |
author_sort |
Kotler, E |
title |
Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory |
title_short |
Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory |
title_full |
Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory |
title_fullStr |
Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory |
title_full_unstemmed |
Cryostratigraphy of the Klondike "muck" deposits, west-central Yukon Territory |
title_sort |
cryostratigraphy of the klondike "muck" deposits, west-central yukon territory |
publisher |
Canadian Science Publishing |
publishDate |
2000 |
url |
http://dx.doi.org/10.1139/e00-013 http://www.nrcresearchpress.com/doi/pdf/10.1139/e00-013 |
genre |
Ice permafrost wedge* Yukon |
genre_facet |
Ice permafrost wedge* Yukon |
op_source |
Canadian Journal of Earth Sciences volume 37, issue 6, page 849-861 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e00-013 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
37 |
container_issue |
6 |
container_start_page |
849 |
op_container_end_page |
861 |
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1797584459235590144 |