Abstract
Geological and geophysical investigations are being conducted to determine the origin, occurrence, and regional distribution of ground ice in the Slave Province. Borehole data, stable isotope analysis, and porewater chemistry provide means of determining ground ice origin. Ground penetrating radar (GPR) provides coverage of sedimentary structures, massive ice extent, and bedrock topography. In conjunction with Ohm-Mapper resistivity surveys, ground penetrating radar is an effective means of delineating massive ice. Preliminary results from 1995 and 1996 suggest that ice in the BHP Airstrip esker was deposited contemporaneously with esker sediments and is interpreted as buried ice. It is presently unclear if ground ice beneath the Carat Lake outwash terrace is intrasedimental ice or buried ground ice. Both are plausible given the geological history and sedimentology of the area. Additional drilling and sampling conducted in the summer of 1996 should provide a more definitive conclusion.
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