Integrated geophysical methods for determining geometry of the Kahrizak Fault,Tehran, Iran |
| |
| Authors: | Asghar Azadi Khaled Hessami Gholam Javan-Doloei |
| |
| Institution: | (1) International Institute of Earthquake Engineering and Seismology, Tehran, Iran; |
| |
| Abstract: | Historical studies and geologic investigations show that the Kahrizak fault located at the southern foot of the central Alborz
Mountains poses a high seismic risk for the Tehran region. However, little is known about the geometry and mechanism of movement
along this seismogenic fault. This paper uses three different geophysical methods namely, seismic refraction, electrical resistivity
and magnetic techniques to investigate geometry and sense of motion across the Kahrizak fault in southern Tehran. Although
the geoelectric measurements do not show clear anomaly across the fault deep down into the ground, it reveals an obvious anomaly
in shallow depths. However, looking at the seismic refraction and magnetic profiles across the Kahrizak scarp, we identified
a high angle fault dipping south. This result in conjunction with the local relief across the fault scarp would suggest that
the southern block is downthrown with respect to the northern block across a normal fault. Such knowledge can contribute to
better evaluate the seismic hazard potential of one of the main seismogenic faults in the Tehran area. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
