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Three permafrost conditions indicated by geophysical soundings in Tertiary sediments at Seymour Island, Antarctic Peninsula

Fournier, H.G. / Buk, E.M. / Corte, A.E.

AbstractFour sites on a flat terrain with Tertiary sediments at Seymour Island were sounded for permafrost depths with VES: two on the Meseta at 200 m a.s.l., one on the Submeseta 50–60 m a.s.l. and one near the shore line at Larsen. Such VES soundings are compared with previous MT soundings: for the compared area, on the Meseta, there is perfect coupling of both types of data.There are three permafrost conditions in the Meseta which are a result of temperature and salinity: the upper one, 80 m thick, an intermediate brine layer, 8.0 m thick, and a lower permafrost, not icebounded, 44 m thick.Permafrost thickness decreases from 127.5 m on the Meseta at 200 m a.s.l. down to 44 m on the Submeseta at 55 m a.s.l. and down to Larsen sea shore with 28 m. This is considered as a response of sea level withdrawal during the last thousands of years because of isostatic rebound of the island due to glacial unloading.

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Three permafrost conditions indicated by geophysical soundings in Tertiary sediments at Seymour Island, Antarctic Peninsula

Fournier, H.G. / Buk, E.M. / Corte, A.E.

AbstractFour sites on a flat terrain with Tertiary sediments at Seymour Island were sounded for permafrost depths with VES: two on the Meseta at 200 m a.s.l., one on the Submeseta 50–60 m a.s.l. and one near the shore line at Larsen. Such VES soundings are compared with previous MT soundings: for the compared area, on the Meseta, there is perfect coupling of both types of data.There are three permafrost conditions in the Meseta which are a result of temperature and salinity: the upper one, 80 m thick, an intermediate brine layer, 8.0 m thick, and a lower permafrost, not icebounded, 44 m thick.Permafrost thickness decreases from 127.5 m on the Meseta at 200 m a.s.l. down to 44 m on the Submeseta at 55 m a.s.l. and down to Larsen sea shore with 28 m. This is considered as a response of sea level withdrawal during the last thousands of years because of isostatic rebound of the island due to glacial unloading.

Three permafrost conditions indicated by geophysical soundings in Tertiary sediments at Seymour Island, Antarctic Peninsula

Fournier, H.G. / Buk, E.M. / Corte, A.E.

AbstractFour sites on a flat terrain with Tertiary sediments at Seymour Island were sounded for permafrost depths with VES: two on the Meseta at 200 m a.s.l., one on the Submeseta 50–60 m a.s.l. and one near the shore line at Larsen. Such VES soundings are compared with previous MT soundings: for the compared area, on the Meseta, there is perfect coupling of both types of data.There are three permafrost conditions in the Meseta which are a result of temperature and salinity: the upper one, 80 m thick, an intermediate brine layer, 8.0 m thick, and a lower permafrost, not icebounded, 44 m thick.Permafrost thickness decreases from 127.5 m on the Meseta at 200 m a.s.l. down to 44 m on the Submeseta at 55 m a.s.l. and down to Larsen sea shore with 28 m. This is considered as a response of sea level withdrawal during the last thousands of years because of isostatic rebound of the island due to glacial unloading.

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Title:

Three permafrost conditions indicated by geophysical soundings in Tertiary sediments at Seymour Island, Antarctic Peninsula

Contributors:

Fournier, H.G. (author) / Buk, E.M. (author) / Corte, A.E. (author)

Published in:

Cold Regions, Science and Technology ; 17 ; 301-307

Publication date:

1989-07-14

Size:

7 pages

ISSN:

DOI:

https://doi.org/10.1016/S0165-232X(05)80008-4

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

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