The Potential of luminescence dating Method for Earthquake risk evaluation of Tehran (And other sites in Iran)
|Category||Tectonic & Seismotectonic|
|Location||21th symposium on geosciences|
|Holding Date||24 May 2008|
Tehran people are apprehensively waiting for an enormous natural disaster. The basis for this anxiety is the announcement of possibility of occurrence of an earthquake in Tehran. An earthquake as strong as the one that flattened the south-eastern city of Bam could kill many times more than the 30,000 people who are feared dead there. The main basis for Tehran earthquake prediction is the historical data which show that many earthquakes have occurred within last hundreds of centuries and there has been a major earthquake in Tehran every 165 years. It is estimated that a repeat of the last big quake to hit Tehran, which killed 45,000 in 1830, would today kill some percent of the capital's population.
Unfortunately, historical records are generally inadequate for evaluations of seismicity. Palaeoseismology addresses this problem and has been widely used in the countries which suffer from adequate historical record (e.g., U.S.A) and countries that have access to historical record but are looking for pre-historical information such as China and Japan.
Iran is a disaster-prone country, and we need to create better coordination between the different organisations who are involved in disaster management to invite the related specialist to plan a scientific program to study palaeo-earthquakes in Tehran (and other sites in Iran).
One of the main bases for palaeo-earthquake studies is to use suitable techniques for dating earthquake-disturbed materials prior to the time of recorded information. Nowadays, luminescence dating has been chosen a potentially possible and reliable dating method for fault dating studies (due to its recent development within last several years). Therefore, it is essential to use this technique to help to recognise "active faults", which is ultimately, a key to programming fortification of buildings and constructing power plants, dams and etc.
This paper presents the theoretical and practical examples of using luminescence in above mentioned studies.