Call number:
ZSP-202-42
In:
Research report / Cold Regions Research and Engineering Laboratory, 42
Description / Table of Contents:
Summary: The results of petrofabric studies in the laboratory on five samples of high-density snow collected in 1954 and 1955 at depths of 8.0, 15.5, 23.0, 34.2, and 46.3 m in a pit at Site 2 are reported. The porosity of the samples, the number of grains/cm^2, the mean number of adjacent grains per grain, the mean grain cross section, the size distribution of grain cross sections, and the orientation of c-axes were determined from enlarged photomicrographs of thin sections, using reflected light and transmitted polarized light. The number of adjacent grains per grain, the ratio of free to occupied grain surface, and the sphericity clearly depended on porosity and on each other. There was no strong relation between these data and the number of grains/cm^2. Hence, the structure of high density snow can be satisfactorily described by the porosity and the number of grains/cm^2 . Conclusions from a two-dimensional thin section can be applied to a spatial sample only if the sample is isotropic by strata.
Type of Medium:
Series available for loan
Pages:
iv, 24 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory 42
URL:
https://hdl.handle.net/11681/2719
Language:
English
Note:
CONTENTS
Page
Preface
Summary
Introduction
Methods of preparation
Measurements of structural properties
Measurements on homogeneity and isotropy
Results
Structure data
Orientation of c-axes
Analysis of the distribution of the orientation of c-axes
Preferred directions of the fabric
Distribution of grain cross sections
Size and shape of the counting areas
Interrelations of the structure, data
Conclusions
Recommendations for further studies
References
Location:
AWI Archive
Branch Library:
AWI Library
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