Geometry and genetics of joints in bahshiqa area.
Abstract
Two main sets of joints were found in pila spi, alfatha, and injana formation in bahsiqa area.- These sets are ac & BC joints. Joints system were also found but in minor amount.
The paleostress 1 which was responsible for the formation of AC and hko acute about A joints, was trending north south before and during the formation of the major anticline (from middle Eocene pre- Pliocene).
The bc type of joints was formed during the fold formation by two mechanism types ( hinge deformation and limp deformation). In these two mechanism, the axis 1 was trended northeast southwest and north south respectively. At the pre folding time the hko acute about b developed to form subsurface strike slip displacements which influenced the geometry of bahsiqa anticline.
