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Rogers & Gerla 1988
Rogers, R.D. and Gerla, P. (1988). Fracture-accommodated strain in the Diamond Joe stock, Arizona. Journal of Geophysical Research 93: doi: 10.1029/88JB01446. issn: 0148-0227.

Fractures filled with hydrothermal minerals form a dominantly radial pattern in the Diamond Joe stock. These fractures record a portion of the deformation experienced by the pluton from the time that it was emplaced until it cooled to ambient conditions. In individual outcrops, fracture orientations are very consistent, to within ¿10¿. Where fractures cross k-feldspar phenocrysts, no shear offset is observed, indicating that the fractures have opened by dilation. We have measured the apertures of these veins and define a two-dimensional deformation gradient matrix to characterize the uniaxial strain accommodated by each fracture. We assume that each fracture represents one increment of strain and superimpose all increments in an individual outcrop to compute the fracture-accommodated strain for that outcrop. We calculate the orientation and magnitude of the principal strains for each outcrop as well as the area change accommodated by the fractures. All of the outcrops have experienced a decrease in area that ranges from 5%. A portion of this area change is interpreted as thermal contraction. However, in the central part of the pluton, additional contraction is present. In this portion of the pluton the amount of strain, and area change, correlates well with fracture contraction to result from volume changes associated with crystallization contraction to result from volume changes associated with crystallization and/or vapor exsolution during crystallization of the pluton. ¿ American Geophysical Union 1988

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Keywords
Information Related to Geographic Region, North America
Journal
Journal of Geophysical Research
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American Geophysical Union
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