Landslides as paleoseismic indicators along the North Tehran Fault (North of Iran)
عنوان دوره: هجدهمین کنفرانس ژئوفیزیک ایران
نویسندگان
1دانشجو
2موسسه ژئوفیزیک
3دانشیار
چکیده
Study of large earthquakes in mountainous ranges suggests that earthquakes have always caused multiple landslides. We used Earthquake-induced Landslides for our paleoseismology investigations along North Tehran Fault (NTF). After identifying 4 landslides (Kan (2 landslides), Suleghan and Keshar) we studied them for seismic triggering. Based on our field studies and some other evidences like 958AD Ray-Taleghan earthquake’s report, seismic triggering can be inferred. We collected our OSL samples for dating Suleghan landslide from its Lake sediments which caused by the landslide. We also have a plan to take samples from other landslide so we can compare the ages of landslides. If all four landslides show a similar age, all four of them are triggered in an earthquake and otherwise there will be other scenarios. We also observed Olistolith deposits which they are most likely to be deposited during the paleo-earthquakes (Eocene) in the Karaj sedimentary basin and show inversion tectonics in central Alborz (normal to reverse).
کلیدواژه ها
 
Title
Landslides as paleoseismic indicators along the North Tehran Fault (North of Iran)
Authors
Mahbubeh shojaei saady, morteza fattahi, Mohammad Reza Ghassemi
Abstract
Study of large earthquakes in mountainous ranges suggests that earthquakes have always caused multiple landslides. We used Earthquake-induced Landslides for our paleoseismology investigations along North Tehran Fault (NTF). After identifying 4 landslides (Kan (2 landslides), Suleghan and Keshar) we studied them for seismic triggering. Based on our field studies and some other evidences like 958AD Ray-Taleghan earthquake’s report, seismic triggering can be inferred. We collected our OSL samples for dating Suleghan landslide from its Lake sediments which caused by the landslide. We also have a plan to take samples from other landslide so we can compare the ages of landslides. If all four landslides show a similar age, all four of them are triggered in an earthquake and otherwise there will be other scenarios. We also observed Olistolith deposits which they are most likely to be deposited during the paleo-earthquakes (Eocene) in the Karaj sedimentary basin and show inversion tectonics in central Alborz (normal to reverse).
Keywords
Earthquake-induced landslide, Olistolith, Alborz