TY  - JOUR
AU  - Delmonte B., Petit J. R.
PY  - 2004//
TI  - First characterization and dating of East Antarctic bedrock inclusions from subglacial Lake Vostok acccreted ice.
T2  - Environ. Chem.
JO  - Environmental chemistry
SP  - 1
EP  - 5
VL  - 1
N2  - The Vostok (East Antarctica, 78°S, 106°E) ice core preserves, below the meteoric ice keeping the climatic memory of the last 420?000 years, ice formed by freezing of subglacial Lake Vostok water. This latter contains some bedrock fragments representing unique samples for the geological investigation of the East Antarctic Plateau, covered by ~2–4 km of ice. The first geochemical (87Sr/86Sr versus 143Nd/144Nd) and mineralogical characterization of these inclusions as well as the dating of one of them (Nd model age on whole-rock sample) has given evidence for a Mid-Proterozoic age of the basement lying below the ice sheet, consistent with recent geophysical data. The geochemical characteristics of bedrock inclusions within the accreted ice zone are markedly different from those of the mineral dust of aeolian origin archived in the uppermost part of the Vostok ice core and originating from deflation of the Southern Hemisphere continents, and easily discriminates between the two contributions.
SN  - 1448-2517
UR  - http://dx.doi.org/10.1071/EN04029
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=2605), last updated on Mon, 27 Apr 2009 14:30:05 +0200
ID  - DelmonteB.2004
ER  -