Writers : M.Eliassi,A.A. Nogol Sadat ,M.Gharashi
Refference : Geosciences Scientific Quarterly Journal,No.:35-36,P.:18
Publishing Year : 1380

Abstract :
Shear planes, containIng eUckenside Ilneatlons were analysed statistically In 28 localIties. The sampling sites were .ele!ed on the basis of Post-Eocene fault activations. Th. sites cover an area of 750 square kilometers of the southern part of the Central Alborz. Different methods of shape factor determination ware tested. The results demonstrated that plotting 3-D unscaled Mohrdlagram Is the most reliable method. Variation In A-spectrum In the studied area proved to be of type II, I.e geometrically type flattened (0< R< 1).
The A- value of equivalent ellipsoid represents the whole ellipsoids can be replaced by an ellipsoid similar to that causing conjugate faults. Variation In A- spectrum also supports the slIp-tendency model to be low and high In Mobarak Abed and Tochai area respectively. Key words: Psleostr.ss, fault Plane solution, shape factor, Mohr- circle.
Subject List : Tension, Ellipsoids