Article Dans Une Revue Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science Année : 2001

High crystalline quality of large single crystals of subglacial ice above Lake Vostok (Antarctica) revealed by hard X-ray diffraction

Résumé

X-ray diffraction experiments were carried out on large ice crystals from accreted ice above Lake Vostok, a subglacial lake lying beneath the East Antarctic ice sheet. Results indicate a surprisingly very low lattice distortion. This crystalline quality does not seem to be affected by impurities. Abnormal grain growth should occur and could explain both the large grain size and the low lattice distortion. Accreted ice is therefore supposed to be non-plastically deforming. These results should be taken into account for further studies of the permeability of accreted ice to drilling fluid present in the borehole.

Domaines

Fichier principal
Vignette du fichier
montagnat2001.pdf (188.95 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Licence

Dates et versions

hal-05062295 , version 1 (28-05-2025)

Licence

Identifiants

Citer

Maurine Montagnat, Paul Duval, Pierre Bastie, Bernard Hamelin, Olivier Brissaud, et al.. High crystalline quality of large single crystals of subglacial ice above Lake Vostok (Antarctica) revealed by hard X-ray diffraction. Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, 2001, 333 (8), pp.419-425. ⟨10.1016/S1251-8050(01)01667-6⟩. ⟨hal-05062295⟩
1020 Consultations
135 Téléchargements

Altmetric

Partager

  • More