Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen
Pingos are common features in permafrost regions that form by subsurface massive-ice aggradation and create hill-like landforms. Pingos on Spitsbergen have been previously studied to explore their structure, formation timing and connection to springs as well as their role in postglacial landform evo...
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Copernicus Publications
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ftdoajarticles:oai:doaj.org/article:1d1a8cdfdf8f4deca8148d271a0e189d 2023-05-15T16:37:09+02:00 Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen N. Demidov S. Wetterich S. Verkulich A. Ekaykin H. Meyer M. Anisimov L. Schirrmeister V. Demidov A. J. Hodson 2019-11-01T00:00:00Z https://doi.org/10.5194/tc-13-3155-2019 https://doaj.org/article/1d1a8cdfdf8f4deca8148d271a0e189d EN eng Copernicus Publications https://www.the-cryosphere.net/13/3155/2019/tc-13-3155-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-3155-2019 1994-0416 1994-0424 https://doaj.org/article/1d1a8cdfdf8f4deca8148d271a0e189d The Cryosphere, Vol 13, Pp 3155-3169 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-3155-2019 2022-12-31T12:04:44Z Pingos are common features in permafrost regions that form by subsurface massive-ice aggradation and create hill-like landforms. Pingos on Spitsbergen have been previously studied to explore their structure, formation timing and connection to springs as well as their role in postglacial landform evolution. However, detailed hydrochemical and stable-isotope studies of massive-ice samples recovered by drilling have yet to be used to study the origin and freezing conditions in pingos. Our core record of 20.7 m thick massive pingo ice from Grøndalen is differentiated into four units: two characterised by decreasing δ 18 O and δ D and increasing d (units I and III) and two others showing the opposite trend (units II and IV). These delineate changes between episodes of closed-system freezing with only slight recharge inversions of the water reservoir and more complicated episodes of groundwater freezing under semi-closed conditions when the reservoir was recharged. The water source for pingo formation shows similarity to spring water data from the valley with prevalent Na + and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msubsup><mi mathvariant="normal">HCO</mi><mn mathvariant="normal">3</mn><mo>-</mo></msubsup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="33pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="eb873fe7aee1cdf217b166d877fa3e0f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-3155-2019-ie00001.svg" width="33pt" height="16pt" src="tc-13-3155-2019-ie00001.png"/></svg:svg> ions. The sub-permafrost groundwater originates from subglacial meltwater that most probably followed the fault structures of Grøndalen and Bøhmdalen. The presence of permafrost below the pingo ice body suggests that the talik is frozen, and the water supply and pingo growth are terminated. The maximum thaw ... Article in Journal/Newspaper Ice permafrost The Cryosphere Spitsbergen Directory of Open Access Journals: DOAJ Articles Bøhmdalen ENVELOPE(14.767,14.767,78.000,78.000) Grøndalen ENVELOPE(13.557,13.557,66.675,66.675) Talik ENVELOPE(146.601,146.601,59.667,59.667) The Cryosphere 13 11 3155 3169 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
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Environmental sciences GE1-350 Geology QE1-996.5 N. Demidov S. Wetterich S. Verkulich A. Ekaykin H. Meyer M. Anisimov L. Schirrmeister V. Demidov A. J. Hodson Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Pingos are common features in permafrost regions that form by subsurface massive-ice aggradation and create hill-like landforms. Pingos on Spitsbergen have been previously studied to explore their structure, formation timing and connection to springs as well as their role in postglacial landform evolution. However, detailed hydrochemical and stable-isotope studies of massive-ice samples recovered by drilling have yet to be used to study the origin and freezing conditions in pingos. Our core record of 20.7 m thick massive pingo ice from Grøndalen is differentiated into four units: two characterised by decreasing δ 18 O and δ D and increasing d (units I and III) and two others showing the opposite trend (units II and IV). These delineate changes between episodes of closed-system freezing with only slight recharge inversions of the water reservoir and more complicated episodes of groundwater freezing under semi-closed conditions when the reservoir was recharged. The water source for pingo formation shows similarity to spring water data from the valley with prevalent Na + and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><msubsup><mi mathvariant="normal">HCO</mi><mn mathvariant="normal">3</mn><mo>-</mo></msubsup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="33pt" height="16pt" class="svg-formula" dspmath="mathimg" md5hash="eb873fe7aee1cdf217b166d877fa3e0f"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-13-3155-2019-ie00001.svg" width="33pt" height="16pt" src="tc-13-3155-2019-ie00001.png"/></svg:svg> ions. The sub-permafrost groundwater originates from subglacial meltwater that most probably followed the fault structures of Grøndalen and Bøhmdalen. The presence of permafrost below the pingo ice body suggests that the talik is frozen, and the water supply and pingo growth are terminated. The maximum thaw ... |
format |
Article in Journal/Newspaper |
author |
N. Demidov S. Wetterich S. Verkulich A. Ekaykin H. Meyer M. Anisimov L. Schirrmeister V. Demidov A. J. Hodson |
author_facet |
N. Demidov S. Wetterich S. Verkulich A. Ekaykin H. Meyer M. Anisimov L. Schirrmeister V. Demidov A. J. Hodson |
author_sort |
N. Demidov |
title |
Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen |
title_short |
Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen |
title_full |
Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen |
title_fullStr |
Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen |
title_full_unstemmed |
Geochemical signatures of pingo ice and its origin in Grøndalen, west Spitsbergen |
title_sort |
geochemical signatures of pingo ice and its origin in grøndalen, west spitsbergen |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/tc-13-3155-2019 https://doaj.org/article/1d1a8cdfdf8f4deca8148d271a0e189d |
long_lat |
ENVELOPE(14.767,14.767,78.000,78.000) ENVELOPE(13.557,13.557,66.675,66.675) ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Bøhmdalen Grøndalen Talik |
geographic_facet |
Bøhmdalen Grøndalen Talik |
genre |
Ice permafrost The Cryosphere Spitsbergen |
genre_facet |
Ice permafrost The Cryosphere Spitsbergen |
op_source |
The Cryosphere, Vol 13, Pp 3155-3169 (2019) |
op_relation |
https://www.the-cryosphere.net/13/3155/2019/tc-13-3155-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-3155-2019 1994-0416 1994-0424 https://doaj.org/article/1d1a8cdfdf8f4deca8148d271a0e189d |
op_doi |
https://doi.org/10.5194/tc-13-3155-2019 |
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The Cryosphere |
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13 |
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11 |
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3155 |
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3169 |
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1766027442644844544 |