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Geometry of the Concord, North Carolina, intrusive complex; a synthesis of potential field modeling and petrologic data

Richard T. Williams and Harry Y. McSween
Geometry of the Concord, North Carolina, intrusive complex; a synthesis of potential field modeling and petrologic data
Geology (Boulder) (January 1989) 17 (1): 42-45

Abstract

We propose a new model to explain the geometric and petrologic characteristics of a large gabbro-syenite complex in the southern Appalachian Piedmont, based on reinterpretation of available gravity, magnetic, and petrologic data. In our interpretation the complex is composed of vertically stacked, tabular plutons, and the exposed intrusive rocks are underlain by a much larger body, vertically separated by 1-1.5 km. Our model provides a possible explanation for the perplexing absence from the Concord complex of rock types intermediate to syenite and gabbro in the fractionation sequence. Fractionation occurred in the deeper magma chamber, which was episodically tapped to produce syenite and gabbro at higher levels.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 17
Serial Issue: 1
Title: Geometry of the Concord, North Carolina, intrusive complex; a synthesis of potential field modeling and petrologic data
Affiliation: Univ. Tenn., Dep. Geol. Sci., Knoxville, TN, United States
Pages: 42-45
Published: 198901
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 23
Accession Number: 1989-024525
Categories: Igneous and metamorphic petrologyStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch maps
N35°15'00" - N35°30'00", W80°45'00" - W80°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1989
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