Abstract
Several problems in the fields of tectonics, structural geology
and isotopic dating were examined and simplified using computer
programs. These problems include the theory of refolding, refold
applications to three mining areas, hotspots and their
relationship to mantle convection systems and ionium dating of
volcanic rocks. In the first study, it was shown that current
refold classification schemes are inadequate and so modifications
were suggested. Various other aspects of multiple generations of
interfering folds were also examined. The ideas of refold theory
were then applied to three mining areas, the Chisel Lake Ore Body
of Manitoba, the Galena-Roubaix District of South Dakota and
Montauban-les-Mines of Quebec. These three studies represent three
different techniques of identifying fold generations.
The third study of this dissertation involved the examination of
hotspots/highspots at various localities of the earth. The
distribution was then used to define a polygonal convection
system, which is similar to laboratory mantle models. It was also
attempted to integrate this model with recent whole mantle
convection models to see if the combination was compatible with
observed hotspot tracks.
The final study involves a review of the deficiencies of the
various ionium dating techniques used on volcanic rocks. A new
method was presented which is free of these deficiencies.
Thiessen, R.L., 1980. Theoretical and computer assisted studies
in tectonics, structural geology and isotope dating.
Unpublished PhD dissertation, State University of New York at
Albany. 489pp., +ix
University at Albany Science Library call number: SCIENCE
MIC Film QE 601.2 T44X
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Front matter (title,
table of contents, abstract, acknowledgements) - 0.25MB pdf
file
Photo pages in dissertation
(colour
photos with captions): - 2.8MB pdf file
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