The Development of Tabular Massive Ground Ice at Peninsula Point, N.W.T., Canada

ABSTRACT

By employing a recently developed technique for extracting and analyzing the gas content in ice, new information on the origin and age of the tabular massive ground ice body located at Peninsula Point, N.W.T., was acquired. The ice sublimation gas extraction technique was used to measure gas content, CO2 and N2O concentrations, and 13C and 18O isotope abundances. These data were supplemented by petrographic analysis of the ice core and 18O measurements of the H2O. From this new information it is apparent that the genesis of the ice body involves a complex history of ice segregation taking place as recently as 13,860 years BP.