Date of Award

1993

Degree Type

Thesis

Degree Name

M.Sc.

Department

Civil and Environmental Engineering

First Advisor

Holm, P.

Keywords

Geology.

Rights

CC BY-NC-ND 4.0

Abstract

Cores of a marble of the Grenville province, near Tweed, Ontario were experimentally deformed to determine the influence of the previous strain history and resultant fabric of the mylonite on its deformational behaviour during subsequent deformation. Samples for this analysis were obtained from a mylonitic shear zone within the Central Metasedimentary Belt (CMB) of the Grenville Province near Tweed, Ontario. Outcrops of the shear zone were mapped in detail, and field observations and thin sections of the marbles were used to determine the kinematic history of the shear zone. Nineteen large oriented blocks of the marble were collected within the study area, and one was collected east of the study area from a marble outcrop. Of the 20 blocks collected 4 exhibit a mylonitic texture, and one is transitional, with well preserved mylonitic textures. Kinematic analysis of the shear zone indicated that the movement sense of the shear zone was top side down (extensional) to the southeast. Experimental tests of 125 sample cores from 5 blocks of the marble were conducted in three orientations with respect to the core axis. The confining pressures of 0, 10, 40, 100, and 200 MPa were chosen to span the range of deformational modes of extension fracture, shear fracture, brittle fault, ductile fault, and possibly uniform flow. (Abstract shortened by UMI.)Dept. of Geology and Geological Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1993 .M323. Source: Masters Abstracts International, Volume: 32-06, page: 1609. Adviser: Paul E. Holm. Thesis (M.Sc.)--University of Windsor (Canada), 1993.

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