In-situ Stress Measurement Program-Field Results. Determination of the Regional Stress Field in New York State and Adjacent Areas by In-Situ Strain Relief Measurements.

摘要

The mapping of stress orientations and magnitudes in rock outcrops may identify domains of uniform stress. These uniform stress domains may help to redefine uniform stress field domains in rock outcrops of tectonic provinces to be more applicable to the problems of earthquake hazard analysis. The focus of this experiment used an overcoring technique to obtain and evaluate the significance of strain-relief measurements over a relatively large region of New York. This report describes the technique used,the sites occupied,the rationale for their selection and discusses some preliminary observations.