Regional basement geology of Lake Huron

O'Hara, Norbert W.; Hinze, William J.

doi:10.1130/0016-7606(1980)91<348:rbgolh>2.0.co;2

Cited by 15 publications

(2 citation statements)

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“…But this anomaly is much broader than that due to the Kentucky body, it is relatively more asymmetrical, and in fact, it is its minimum which overlies the Front. A complex zone of positive gravity anomalies occurs in Lake Huron and the thumb of Michigan, and was used with other information [20] to draw the Grenville Front there, but again the character of these anomiies is unlike that due to the Kentucky body.…”

Section: Regional Structual Settingmentioning

confidence: 99%

Satellite and surface geophysical expression of anomalous crustal structure in Kentucky and Tennessee

Mayhew

Thomas

Wasilewski

1982

Earth and Planetary Science Letters

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Section: Regional Structual Settingmentioning

confidence: 99%

Satellite and surface geophysical expression of anomalous crustal structure in Kentucky and Tennessee

Mayhew

Thomas

Wasilewski

1982

Earth and Planetary Science Letters

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“…13b). GM-1, GM-2, GG-1, and GG-2 may be tracing the southern extension of the Grenville Front because of their similarity to magnetic and gravity anomalies mapped from contour maps along the exposed portion and the inferred southwest extension of the front beneath Paleozoic rocks in Lake Huron (O'Hara and Hinze, 1980;Gibb and others, 1983).…”

Section: Regional Geophysical Trendsmentioning

confidence: 92%

Geological and geophysical evaluation of the region around Saginaw Bay, Michigan (central Michigan Basin) with image processing techniques

Herman

Vincent²,

Drake³

1991

Geological Society of America Special Papers

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A northeast-trending graben was hypothesized to extend southwest of Saginaw Bay to the Mid-Michigan Gravity High, based on interpretation of Landsat 1 imagery, stream drainage maps, and sparse well-log data. The edges of the graben were thought to extend along and southwest of the Pinconning oil field on the northwest side, and the Quanicassee River on the southeast side. Subsequent analysis of digital terrain, magnetic, gravity, seismic, and well-log data showed that no unequivocal evidence for a discrete, simple graben within the originally defined limits could be found. However, the new data indicated that the proposed edges of the "graben" correspond to structural lineaments (monoclines and anticlines) expressed within the Paleozoic section and on the bedrock surface. These structural features correlate with basement contacts and/or fault zones inferred from interpretation of magnetic and gravity images. These possibly basement-controlled structural lineaments influenced depositional patterns intermittently during the Paleozoic, as evidenced by the presence of northeast-trending highs within the limits of the "graben" on isopach maps of Pennsylvanian, Mississippian, and Devonian stratigraphic units. Rapid thinning and facies changes in Middle and Lower Ordovician units across the southeastern edge of the "graben," coupled with its correlation with northeast-trending positive gravity and magnetic anomalies, suggest that this is a significant structural feature, possibly controlled or influenced by the Grenville Front.

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