Masters Theses

Abstract

"Stereoscopic examination of radiographs of rock and ore samples allows a rapid, cursory determination of texture and structure without time consuming preparation and use of thin sections. In addition, volumetric estimates of known mineral components can be made providing they possess significantly different x-ray absorption characteristics.

Stereoscopic effect was most pronounced for specimens having well defined components of structure such as bedding, banding, lineation, inclusions, textural variations and moderate to large x-ray absorption differences. In general, these conditions were best met by ores or ore minerals with their related gangue minerals.

Stereoscopic examination was not successful in revealing twinning or reaction rims in monomineralic specimens. Orientation with respect to various crystallographic axes produced no detectable differences in the radiographs.

A 150-kilovolt industrial x-ray unit with a universal head was used in performing all tests. Optimum depth of focus occurred at a target-to-film distance of 36 11 • A tube shift of 4" gave the best stereo depth effect. Image contrast increased as kilovoltage decreased. Exposure time was varied according to specimen thickness. To avoid parallax errors, tube rotation was not used. All viewing was done hyper stereoscopically (apparent depth exaggerated).

Stereoscopic radiography might be applied with success to rock mechanics, to distribution of aggregates in concrete and inspection of prefabricated concrete beams, to determination of permeability and porosity by allowing visual inspection of introduced material, and to mineral replacement studies"--Abstract, p. ii-iii

Advisor(s)

James C. Maxwell

Committee Member(s)

Gerald B. Rupert
Robert V. Wolf

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geology

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1963

Pagination

v, 71 pages

Note about bibliography

Includes bibliographical references (pages 69-70)

Rights

© 1963 Martin Goldstone, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 1497

Print OCLC #

5953267

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