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

Fournier, Hugo G.; Buk, Enrique; Corte, Arturo E.

doi:10.1016/s0165-232x(05)80008-4

Cited by 11 publications

(7 citation statements)

References 3 publications

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“…Geophysical techniques are low‐impact methods that are especially useful in such sensitive and protected areas as the Antarctic. Electromagnetic (airborne induction or radar techniques) and reflection seismic methods are commonly used to determine ice thickness of glaciers and ice caps [ Hubbard and Glasser , 2005], whereas electric, electromagnetic and refraction seismic methods are the preferred choice on frozen ground [e.g., McGinnis et al , 1973; Fournier et al , 1990; Guglielmin et al , 1997].…”

Section: Introductionmentioning

confidence: 99%

Geophysical identification of permafrost in Livingston Island, maritime Antarctica

Hauck¹,

Vieira²,

Gruber³

et al. 2007

J. Geophys. Res.

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[1] The current permafrost distribution on Livingston Island, South Shetland Islands, maritime Antarctic, was investigated using electrical resistivity tomography, refraction seismics, and shallow borehole temperatures. The field sites include different geological and geomorphological settings, including ice cored moraines and bedrock sites with debris covers of different thickness. Two-dimensional geophysical inversion schemes were used to analyze spatial heterogeneity at field sites and to detect isolated occurrences of ground ice. Results confirm that permafrost is widespread on Livingston Island, with high ice content in ice cored moraines and little in the cracks and fissures of frozen bedrock. Specific electrical resistivity values range from 10,000-40,000 ohm-m (frozen unconsolidated material) to 1500-10,000 ohm-m (frozen quartzite/shale). Combining seismic P wave velocities and specific electrical resistivities, a typical ''roof-type'' distribution was found with maximum resistivities coinciding with P wave velocities around 3000 m/s and decreasing resistivities for both increasing and decreasing velocities.

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Section: Introductionmentioning

confidence: 99%

Geophysical identification of permafrost in Livingston Island, maritime Antarctica

Hauck¹,

Vieira²,

Gruber³

et al. 2007

J. Geophys. Res.

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“…In fact, in Arctic areas the occurrence of undersea permafrost is very widespread, with resistivity readings ranging from 10 to 2000 Wm (Selmann et al 1983). The only known values for the Antarctic areas (Seymour Island, Antarctica Peninsula) remain below 2000 Wm, but may generally range from 20 to 400 Wm (Fournier et al 1990). …”

Section: Discussionmentioning

confidence: 99%

“…Electrical soundings have been carried out fairly extensive only in the Dry Valleys area on glacial deposits and periglacial landforms (Hassinger and Mayewsky 1983;McGinnis et al 1973). Geophysical studies in the ice-free areas in the rest of the Antarctic are rare (Chinn et al 1989;Fournier et al 1990; Kuhnke and Blohm 1989). More speciÞcally, limited electrical soundings have been conducted in Northern Victoria Land near Gondwana Station not too far from Terra Nova Bay Station by Kuhnke and Blohm (1989).…”

Section: Introductionmentioning

confidence: 99%

The contribution of geoelectrical investigations in the analysis of periglacial and glacial landforms in ice free areas of the northern foothills (northern victoria land, antarctica)

Guglielmin¹,

Biasini

Smiraglia

1997

Geografiska Annaler: Series A, Physical Geography

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All periglacial and glacial landforms investigated in the Northern Foothills have a very thin active layer (0.1–0.3 m thickness) overlying a thin permafrost layer, characterised by electrical resistivities ranging between 13 and 50 kΩm and by different thicknesses. Below this surficial layer, different types of ground ice (with a resistivity range from 8000 to 0.1 kΩm) were detected. These different types of ground ice permitted ice‐cored rock glaciers to be distinguished from ice‐cemented rock glaciers, subsea permafrost to be identified in some raised beaches, and other interpretations to be suggested about a debris‐covered glacier. These results have been obtained by vertical electrical soundings (VES) carried out in ice‐free areas of the Northern Foothills, near Terra Nova Bay Station during the tenth national Italian expedition in Antarctica (1994–1995). In these areas on the basis of previous geomorphological research, some landforms such as rock glaciers, raised beaches with patterned ground and debris‐covered glaciers were chosen to carry out the VES. The electrical prospection can be considered a good means for understanding the origins of landforms in ice‐free areas of Antarctica and for making a contribution to the palaeoenvironmental reconstruction of this continent.

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“…Finalmente, la tercera capa constituye la base de este SEV debido a queque no existe espacio para un tendido suficientemente largo para alcanzar mayor profundidad, pero arroja valores resistivos de 176 Ωm que como se ha señalado en trabajo previos (Fournier et al, 1990;Fukuda et al, 1992;Silva Busso et al, 2000) se atribuye a la respuesta de permafrost seco (5-7% de hielo) en sedimentos limo arcillosos, magnitud e interpretación típica de la zona de las islas Marambio y Cerro Nevado.…”

Section: Hidrología Superficial Y Formación De Aguasuprapermafrostunclassified

Geologic - geotechnical characteristics and preservation proposals for the Historic Site and Monument n° 38, Nordenskjöld’s Hut, Antarctica

Silva-Buso¹,

Yermolin²

2017

Bol. geol. min.

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

Cited by 11 publications

References 3 publications

Geophysical identification of permafrost in Livingston Island, maritime Antarctica

Geophysical identification of permafrost in Livingston Island, maritime Antarctica

The contribution of geoelectrical investigations in the analysis of periglacial and glacial landforms in ice free areas of the northern foothills (northern victoria land, antarctica)

Geologic - geotechnical characteristics and preservation proposals for the Historic Site and Monument n° 38, Nordenskjöld’s Hut, Antarctica

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