Skip to Main content Skip to Navigation
Journal articles

Helium and Neon in the Accreted Ice of the Subglacial Antarctic Lake Vostok

Abstract : We analyzed helium and neon in 24 samples from between 3,607 and 3,767 m (i.e., down to 2 m above the lake-ice interface) of the accreted ice frozen to the ceiling of Lake Vostok. Within uncertainties, the neon budget of the lake is balanced, the neon supplied to the lake by the melting of glacier ice being compensated by the neon exported by lake ice. The helium concentration in the lake is about 12 times more than in the glacier ice, with a measured 3He/4He ratio of 0.12 ± 0.01 Ra. This shows that Lake Vostok's waters are enriched by a terrigenic helium source. The 3He/4He isotope ratio of this helium source was determined. Its radiogenic value (0.057 × Ra) is typical of an old continental province, ruling out any magmatic activity associated with the tectonic structure of the lake. It corresponds to a low geothermal heat flow estimated at 51 mW/m2.
Document type :
Journal articles
Complete list of metadata
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Tuesday, June 28, 2022 - 8:17:17 AM
Last modification on : Thursday, June 30, 2022 - 3:27:24 AM


Geophysical Research Letters -...
Publisher files allowed on an open archive





P. Jean-Baptiste, E. Fourré, J. R. Petit, V. Lipenkov, S. Bulat, et al.. Helium and Neon in the Accreted Ice of the Subglacial Antarctic Lake Vostok. Geophysical Research Letters, 2018, 45, pp.4927-4932. ⟨10.1029/2018GL078068⟩. ⟨insu-03706507⟩



Record views


Files downloads