Geometry and genetics of joints in bahshiqa area. | ||
| Iraqi National Journal of Earth Science (INJES) | ||
| Article 12, Volume 2, Issue 1, June 2002, Pages 110-124 PDF (0 K) | ||
| DOI: 10.33899/earth.2002.43836 | ||
| Authors | ||
| Mayada M. Al-Dulaymi; Nabeel K. Al-Azzawi | ||
| 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 δ1 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 δ1 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. | ||
| Keywords | ||
| Geometry; joints; bahshiqa | ||
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