--> ABSTRACT: 363,000-Acre Cambro-Ordovician Gas-Bearing Structure in Newaygo and Mecosta Counties, Michigan, by Lucille C. Tamm and David J. Lachance; #91038 (2010)

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363,000-Acre Cambro-Ordovician Gas-Bearing Structure in Newaygo and Mecosta Counties, Michigan

Lucille C. Tamm, David J. Lachance

A gas-producing structure with an areal extent of approximately 363,000 acres was delineated in December 1985 by the authors. The Newaygo-Mecosta Known Geologic Structure was defined on the basis of recent deep gas wells drilled in Newaygo County, Michigan, in conjunction with publicly available gravity and magnetic surveys, interpreted with the concepts of plate tectonics. Drilling since that time has greatly enlarged the potential for oil as well as gas in the early Paleozoic and late Precambrian of the Michigan basin. Well data and seismic are inadequate to interpret the complex tectonic setting which contributed to the large accumulations of gas now being discovered in the early Paleozoic of the Michigan basin.

The Newaygo-Mecosta Known Geologic Structure's boundaries roughly coincide with a large but low-intensity magnetic low centered in eastern Newaygo County. The large structure is on the southwestern flank of the Mid-Michigan gravity and magnetic anomaly. The structure of the Newaygo-Mecosta Known Geologic Structure was probably formed in association with the tectonic events which created the Mid-Michigan rift zone and the associated sedimentary deposition.

AAPG Search and Discovery Article #91038©1987 AAPG Annual Convention, Los Angeles, California, June 7-10, 1987.