Analysis Seismicity of Bakharden-Quchan Zone with Applying of Asperity and Seismic Parameters

Document Type : Original Article

Authors

1 ph.d student

2 2. Abbas Kangi, Prof of Department of Geology, Shahrood Branch, Islamic Azad University, Shahrood, Iran.

3 3. Abdol RezaJafarian, Prof of Department of Geology, Shahrood Branch, Islamic Azad University, Shahrood, Iran

Abstract

The Bakharden-Quchan Faulted Zone is located in central Part of thrusted­-folding­ belt of kopeh Dagh in NE border of Iran-Turkmenistan with array of active right lateral  ­strike-slip faults by trending NW-SE that their ends have bent to ­joint blind faults in thrusts. Mechanism changing faults to reverse have caused to increase stress, shortening by thrusting in their ends bending. Most of the historical and instrumental earthquakes have distributed around faulted system of Bakharden-Quvhan Zone. Seismicity results of this zone with micro-seismics and computing parameters of b-value, fractal dimension (D) and mapping of local stresses distribution could have achieved us precious data on crust tension distribution, mechanism faults and system fault changes during time and place of probable occurrence future earthquakes. In neo-tectonic active zone b < 0/6 to 1/1 and­ D changes between zero to 2. If b< 0/6 and D closes to zero, faults and earthquakes will concentrate in asperities with high rate of stress but if b> 0/6 and D closes to 2 faults and earthquakes will scatter in whole of zone with low rate of stress. Occurrence of major earthquakes are not far away expectation in edge of asperities although there is a possibility that they gradually loss energy to get inactive because the seismology way of releasing energy in these faults is, when group of faults approach to motion threshold are increased b-values and other group of faults are accumulating energy, so their b-values are decreased

Keywords

Journal of Tectonics
Volume 3, Issue 9
June 2019
Pages 19-39

Files

Share

How to cite

Statistics