Mt. Simon Formation, Michigan Basin and Ohio Area (16)

Comments on Geologic Parameters

16 Rock Mineralogy:

In cores and cuttings of the Mt. Simon sandstone in the subsurface of Michigan and from outcrops in adjacent areas, the rock is a feldspathic quartzose sandstone, and most is arkose. "Many of the quartz and feldspar grains have authigenic overgrowths of secondary-mineral cement." (Briggs, 1968; p.141). However, one should keep in mind that Briggs had a very small data set to choose from. The outcrop observations of Driese and others (1981) (that the Mt. Simon is a quartz arenite) must be taken into account as well. Nonetheless, Briggs (1968) provided a table of rock mineralogy from the Consumers Power Company Brine Disposal No. 139, and we have included it in our analysis.

16 Table:

139 Consumers Power Co 46.6 0.9 26.5 1.4 24.0

16 Reference:

Briggs, L. I., 1968, Geology of subsurface waste disposal in Michigan Basin, in Galley, J. E., ed., Subsurface disposal in geologic basins-a study of reservoir strata: American Association of Petroleum Geologists Memoir 10, p. 128-153.

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