Accession Number:

AD0292089

Title:

SOME PHYSICAL AND CHEMICAL MEASUREMENTS ON ICE WITH REFERENCE TO THE WARD HUNT CORES

Descriptive Note:

Corporate Author:

DARTMOUTH COLL HANOVER N H

Personal Author(s):

Report Date:

1962-10-01

Pagination or Media Count:

1.0

Abstract:

Cores collected from the Ward Hunt shelf during the 1960 field season were analyzed for oxygen contents and gas pressures in an attempt to probe further into the mode of origin and history of the shelf. Three hundred O2 analyses show a wide scatter, and fail to bring out predicted relationships between petrologically determined ice types and gas compositions. Five hundred gas pressure determinations likewise yield unexpectable results. Because the parameters of density, salinity, texture, degree of preferred orientation, grain size, and ice type were known, it was also expected that some type of correlation might be determined between ice strength and these parameters. Shear tests at uniform loading rates and at fixed temperatures failed, however, to bring out any systematic or predictable relationships. Diffusion experiments were run on polycrystalline ice, using tritium as a source material, and nuclear stripping film and liquid scintillation counting for detection. Results led to such high calculated free energies of activation for diffusion 3.5 kcalmole as to suggest abnormal diffusion characteristics. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE