Joint orientation measurements in Western Alberta and British Columbia

Abstract

Joint orientations were measured in the mountains of Western Alberta<br />and British Columbia. These were then evaluated statistically according<br />to the standard method of Kohlbeck and Scheidegger. If the bisectrices<br />of the preferred joint orientations are interpreted as principal directions<br />of the neotectonic stress field, the maximum compression in the latter<br />is found to be from NE-SW (in the South) to NNE-SSW (in the North).<br />This agrees well with data regarding the neotectonic intraplate stresses<br />observed from oil-well break-out data.