Independent estimates of deterministic and probabilistic methods of hazard analysis in the region of Tabas City were conducted in this study . Gutenberg - Richter relation for Tabas was obtained by analyses of seismic data based on LogN= 2.3 - 0.50 Ms. The greatest hori More
Independent estimates of deterministic and probabilistic methods of hazard analysis in the region of Tabas City were conducted in this study . Gutenberg - Richter relation for Tabas was obtained by analyses of seismic data based on LogN= 2.3 - 0.50 Ms. The greatest horizontal acceleration on Tabas city is 0.7g rsulted from Shotori thrust with a shaking power of 7.4 Richters. The obtained results show that, Kalmard fault with length of 170 km and distance of 50 kilometers from Tabas, has the highest impact after Shotori thrust. So that, the most expected seismic (8.93 Richter), the maximum relative intensity at the center (8.32), the maximum horizontal displacement at the center (29.82cm) and the maximum vertical displacement (66.70cm) are the result of this fault on Tabas. Using geostatistical analysis tool in ArcGIS (ordinary kriging), a suitable model was introduced for mapping the maximum gravitational acceleration. Using this map, zones with high and very high seismic risks and two liner earthquake sources with NE- SW trend (west of Tabas) as a result of Kalmard and Ladar faults and NW-SE (east of Tabas) as a result of Shotori, Esfandiar and Nayband faults were identified.
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Hatamabad syncline is located 40 km north of Qayen and with an area of more than 190 km2. In this study, the geometric - kinematic analysis of this syncline was assessed to understand the genetic relation between this structure and Dasht-e-Bayaz active fault. Hatamabad More
Hatamabad syncline is located 40 km north of Qayen and with an area of more than 190 km2. In this study, the geometric - kinematic analysis of this syncline was assessed to understand the genetic relation between this structure and Dasht-e-Bayaz active fault. Hatamabad syncline is situated in Dasht-e-Bayaz fault segmentations gap and its S shape is the result of a sinisteral strike slip movement, raised a lot of questions about the effect of Dasht-e-Bayaz sinisteral fault. Geometric analysis of structural cross sections, determine maximum strain trend 221 or 41 degrees for the Hatamabad syncline. This shows good correlation with stress trend of Dasht-e-Bayaz fault. In addition mechanism of Mohammad Abad -e- Alam fault along with its stress trend 217 or 37 degrees that is obtained by right dihedral method, proves S- shape of Hatamabad syncline. Finally the Hatamabad syncline was deformed due to its location in a sinisteral transpression zone between Dasht-e-Bayaz sinisteral fault with a reverse parameter and Mohammad Abad -e- Alam reverse fault with sinisteral strike slip component.
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