|Northeastern Section - 43rd Annual Meeting (27-29 March 2008)|
|Paper No. 3-3|
|Presentation Time: 8:50 AM-9:10 AM|
THE INFLUENCE OF DUCTILE STRUCTURE AND RHEOLOGICAL HETEROGENEITY ON BRITTLE STRUCTURES AS EXHIBITED BY AVALONIAN GRANITES IN SOUTHEASTERN MASSACHUSETTS
KOPERA, Joseph P., Office of the Massachusetts State Geologist, University of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-5820, firstname.lastname@example.org|
The orientation and geographic distribution of joints, veins, and brittle faults show a conspicuous correlation with the heterogeneous distribution of foliation and lineation intensity in Neo-Proterozoic granites and their deformed counterparts in southeastern Massachusetts. Field mapping and stereonet analysis of brittle and ductile structural data collected during 1:24,000-scale geologic mapping of the Milford quadrangle yielded the following general observations, which suggest that the ductile deformational history of this region appears to have strongly influenced the later development of brittle structures in the same rocks:
The behavior of these fractures in relation to ductile structure have implications for rheological constraints on tectonic models of the post-Alleghenian core of the New England Appalachians, hydrogeologic models of regional fractured bedrock aquifers, and the interpretation of topographic lineaments.
Northeastern Section - 43rd Annual Meeting (27-29 March 2008)
General Information for this Meeting
|Session No. 3|
NEtectonics: The Implications of Crustal Heterogeneity for Structure, Rheology, and Tectonics I
Hyatt Regency Buffalo: Regency Ballroom
8:00 AM-11:30 AM, Thursday, 27 March 2008
Geological Society of America Abstracts with Programs, Vol. 40, No. 2, p. 3
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