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Title: A tale of two sutures: COCORP's deep seismic surveys of the Grenville province in the eastern U. S. midcontinent

Abstract

A pair of oppositely dipping, crustal-scale shear zones imaged within Grenville basement beneath the Paleozoic cover of Ohio can be correlated, via geopotential lineaments, with similarly oriented geologic and seismically imaged structures hundreds of kilometres to the northeast and southwest, suggesting a relatively simple structural framework for the eastern midcontinent region. An east-dipping zone extending from Lake Huron through western Ohio, and possibly farther southwest, marks the western edge of the Grenville province. Perhaps of greater consequence to an understanding of Grenville tectonics is the discovery of a west-dipping zone underlying the Appalachian basin from northern Alabama to New York within the Grenville province. Correlation of this feature with the seismogenic Clarendon-Linden fault in western New York and a boundary between terranes containing magmatic-arc rocks exposed in Canada suggests that it could mark the site of an intra-Grenville province suture zone. Implications of this interpretation are that the Precambrian foundation of the eastern U.S. midcontinent comprises a relatively simple assemblage of laterally extensive terranes or belts of coeval terranes accreted by familiar plate tectonic processes, and that deep seismic profiling is an effective tool for mapping the three-dimensional distribution of these terranes.

Authors:
; ;  [1]
  1. Cornell Univ., Ithaca, NY (USA)
Publication Date:
OSTI Identifier:
6357388
Resource Type:
Journal Article
Journal Name:
Geology; (USA)
Additional Journal Information:
Journal Volume: 18:7; Journal ID: ISSN 0091-7613
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; APPALACHIAN BASIN; LINEAMENTS; CORRELATIONS; ALABAMA; BASEMENT ROCK; CANADA; CONTINENTAL CRUST; GEOLOGIC FAULTS; GEOLOGIC MODELS; GEOLOGIC STRUCTURES; MAPPING; NEW YORK; OHIO; PRECAMBRIAN ERA; REGIONAL ANALYSIS; SEISMIC SURVEYS; SHEAR; TECTONICS; EARTH CRUST; FEDERAL REGION II; FEDERAL REGION IV; FEDERAL REGION V; GEOLOGIC AGES; GEOLOGIC FRACTURES; GEOPHYSICAL SURVEYS; NORTH AMERICA; SEDIMENTARY BASINS; SURVEYS; USA; 580000* - Geosciences

Citation Formats

Culotta, R C, Oliver, J, and Pratt, T. A tale of two sutures: COCORP's deep seismic surveys of the Grenville province in the eastern U. S. midcontinent. United States: N. p., 1990. Web. doi:10.1130/0091-7613(1990)018<0646:ATOTSC>2.3.CO;2.
Culotta, R C, Oliver, J, & Pratt, T. A tale of two sutures: COCORP's deep seismic surveys of the Grenville province in the eastern U. S. midcontinent. United States. https://doi.org/10.1130/0091-7613(1990)018<0646:ATOTSC>2.3.CO;2
Culotta, R C, Oliver, J, and Pratt, T. 1990. "A tale of two sutures: COCORP's deep seismic surveys of the Grenville province in the eastern U. S. midcontinent". United States. https://doi.org/10.1130/0091-7613(1990)018<0646:ATOTSC>2.3.CO;2.
@article{osti_6357388,
title = {A tale of two sutures: COCORP's deep seismic surveys of the Grenville province in the eastern U. S. midcontinent},
author = {Culotta, R C and Oliver, J and Pratt, T},
abstractNote = {A pair of oppositely dipping, crustal-scale shear zones imaged within Grenville basement beneath the Paleozoic cover of Ohio can be correlated, via geopotential lineaments, with similarly oriented geologic and seismically imaged structures hundreds of kilometres to the northeast and southwest, suggesting a relatively simple structural framework for the eastern midcontinent region. An east-dipping zone extending from Lake Huron through western Ohio, and possibly farther southwest, marks the western edge of the Grenville province. Perhaps of greater consequence to an understanding of Grenville tectonics is the discovery of a west-dipping zone underlying the Appalachian basin from northern Alabama to New York within the Grenville province. Correlation of this feature with the seismogenic Clarendon-Linden fault in western New York and a boundary between terranes containing magmatic-arc rocks exposed in Canada suggests that it could mark the site of an intra-Grenville province suture zone. Implications of this interpretation are that the Precambrian foundation of the eastern U.S. midcontinent comprises a relatively simple assemblage of laterally extensive terranes or belts of coeval terranes accreted by familiar plate tectonic processes, and that deep seismic profiling is an effective tool for mapping the three-dimensional distribution of these terranes.},
doi = {10.1130/0091-7613(1990)018<0646:ATOTSC>2.3.CO;2},
url = {https://www.osti.gov/biblio/6357388}, journal = {Geology; (USA)},
issn = {0091-7613},
number = ,
volume = 18:7,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 1990},
month = {Sun Jul 01 00:00:00 EDT 1990}
}