Writers : Seyyed Saeed-al-reza Eslami; Supervisor: Dr. Ahmad Zamani
Refference : Msc. Thesis
Publishing Year : 1386

Abstract :

Fault migration, an important phenomenon in fault-zones, is neither fully investigated nor defined comprehensively. Research of such phenomena is accompanied with many problems because their third and fourth dimensions (i.e. depth and time) are not sufficiently known. These problems say that the existing methods are incomplete and should be modified.
In this research, a new method is represented to study fault migration. Detecting, identifying and measuring the phenomenon are three stages of the new method. It is necessary to study downward for the 2nd stage and upward for the 3rd stage of the proposed method.
A new approach is represented in this research for identifying the phenomenon, i.e. the 2nd stage of proposed method. This approach which is called "fourfold movement" comprises four logically movements: movement from observations to model, movement in the model, movement from the model to observations by the model and movement in the observations by the model.
In this manner, based on observations on Ardekul active strike-slip fault zone (Eastern Iran), an evolutionary path is considered for strike-slip fault zone. According to this evolutionary path four stages; namely embryonic, youth, maturity and declining have been recognized. This evolutionary path may be generalized over different scales of brittle deformation. The proposed evolutionary path makes the fault migration clear. A case study of Ardekul fault zone is chosen for applying defined fault zone evolution and fault migration. Based on the results, fault migration can be divided in two grades; one the prior and second the posterior fault migration. Details of prior migration are distinguished including time of occurrence, stages, types, scales and mechanisms of migration, effective factors on migration and its characteristic features. The posterior migration can be studied from the viewpoint of prior migration. Moreover, the fault migration can be comprehensively classified in two topics; production-oriented fault migration and development-oriented fault migration. Some clay cake experiments are also designed to show the prior and posterior fault migrations.

Subject List : Strickslip fault