Date of Award
Master of Science
Dr. R. B. Chase
Dr. C. J. Schmidt
Dr. R. N. Passero
Masters Thesis-Open Access
The major fracture systems in the Jacobsville sandstone likely originated by reverse faulting on the Keweenaw fault and by glacially produced thrusting. Fracture orientations, apertures, and spacings are uniform in the Jacobsville sandstone and Lighthouse Point member of the Mona Schist, and are variable in the Lower member of the Mona schist and Compeau Creek gneiss. Fracture sets in the Compeau Creek gneiss exist in domains separated by metadiabase dikes. The metadiabase dikes relieved the strain produced by the Penokean orogeny by fracturing. Fractures present in inclusions, quartz veins, metadiabase and diabase dikes can be used to temporally evaluate the strain history of the Compeau Creek gneiss.
Potential sources for useful groundwater wells will be found in areas of thrust faulted Jacobsville sandstone, fractured zones in the pillowed Lower member of the Mona schist, and linear sags in the topography of the Compeau Creek gneiss.
Belliveau, Leonard Paul, "Fractures in the Jacobsville Sandstone and the Precambrian “W” Rocks in Eastern Marquette County, Michigan" (1991). Master's Theses. 944.